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1

GLADY CASSIT Y VANDALIA MURPHY CR EEK BU CKHN-CENT URY CLAY  

Gasoline and Diesel Fuel Update (EIA)

ABBOTT-FREN CH CR EEK AU BURN DAGU E BEASON RU N ELLAMORE RUSSET GAULEY MOUNTAIN JORDAN RUN OVERHI LL HANNIBAL BU FFALO FETT ERMAN ETAM AR MBRUST LOR EN TZ ORM A LINDEN FALL...

2

Market Statistics Data Provided by IRES, LLC  

E-Print Network (OSTI)

Market Statistics Data Provided by IRES, LLC Rockwell Hall West #12;#12;Market Statistics ­ Northern Colorado Region Market Statistics ­ 2014 ©2014 Everitt Real Estate Center, All Rights Reserved. The EREC Market Statistics for the Northern Colorado Region details historical closing and inventory trends

3

Low-temperature vacuum resonator for IRES-1001 and IRES-1003 EPR spectrometer-relaxometers  

SciTech Connect

A vacuum resonator for studying electron paramagnetic resonance at temperatures of 4.2-300 degrees K is described. The resonator allows recording of EPR spectra when the scanning time of the polarizing magnetic field greater than or equal to50 usec and its amplitude less than or equal to20 mT. Use of this resonator in the IRES-1001 EPR spectrometer relaxometer considerably increased the accuracy of studies of the temperature dependence of the spectra and the electron SLR times of the paramagnetic centers.

Troitskii, V.V.; Cheredintsev, V.G.; Dudkov, V.N.; Nuromtsev, V.I.

1985-10-01T23:59:59.000Z

4

LOOKOU T U-87 U-70 PEC ONI C COM AN CHE CR EEK U-107 HUGO CLIFF  

U.S. Energy Information Administration (EIA) Indexed Site

Liquids Reserve Class Liquids Reserve Class No 2001 liquids reserves 0.1 - 10 Mbbl 10.1 - 100 Mbbl 100.1 - 1,000 Mbbl 1,000.1 - 10,000 Mbbl 10,000.1 - 100,000 Mbbl Denver Basin Outline The mapped oil and gas field boundary outlines were created by the Reserves and Production Division, Office of Oil and Gas, Energy Information Administration pursuant to studies required by Section 604 of the Energy Policy and Conservation Act Amendments of 2000 (P.L. 106-469). The boundaries are not informed by subsurface structural information. The data and methods used in their creation are detailed in a report, "Scientific Inventory of Onshore Federal Lands' Oil and Gas Resources and Reserves and the Extent and Nature of Restrictions to Their Development", prepared by the US Departments of Interior, Agriculture and Energy.

5

LOOKOU T U-87 U-70 PEC ONI C COM AN CHE CR EEK U-107 HUGO CLIFF  

U.S. Energy Information Administration (EIA) Indexed Site

Gas Reserve Class Gas Reserve Class No 2001 gas reserves 0.1 - 10 MMCF 10.1 - 100 MMCF 100.1 - 1,000 MMCF 1,000.1 - 10,000 MMCF 10,000.1 - 100,000 MMCF > 100,000 MMCF Denver Basin Outline The mapped oil and gas field boundary outlines were created by the Reserves and Production Division, Office of Oil and Gas, Energy Information Administration pursuant to studies required by Section 604 of the Energy Policy and Conservation Act Amendments of 2000 (P.L. 106-469). The boundaries are not informed by subsurface structural information. The data and methods used in their creation are detailed in a report, "Scientific Inventory of Onshore Federal Lands' Oil and Gas Resources and Reserves and the Extent and Nature of Restrictions to Their Development", prepared by the US

6

LOOKOU T U-87 U-70 PEC ONI C COM AN CHE CR EEK U-107 HUGO CLIFF  

U.S. Energy Information Administration (EIA) Indexed Site

BOE Reserve Class BOE Reserve Class No 2001 reserves 0.1 - 10 MBOE 10.1 - 100 MBOE 100.1 - 1,000 MBOE 1,000.1 - 10,000 MBOE 10,000.1 - 100,000 MBOE > 100,000 MBOE Denver Basin Outline The mapped oil and gas field boundary outlines were created by the Reserves and Production Division, Office of Oil and Gas, Energy Information Administration pursuant to studies required by Section 604 of the Energy Policy and Conservation Act Amendments of 2000 (P.L. 106-469). The boundaries are not informed by subsurface structural information. The data and methods used in their creation are detailed in a report, "Scientific Inventory of Onshore Federal Lands' Oil and Gas Resources and Reserves and the Extent and Nature of Restrictions to Their Development", prepared by the US

7

Spectroscopic Investigation of p-Shell Lambda Hypernuclei by the (e,e'K+) Reaction  

SciTech Connect

Hypernuclear spectroscopy is a powerful tool to investigate Lambda-N interaction. Compared with other Lambda hypernuclei productions, electroproduction via the (e,e'K+) reaction has the advantage of exciting states deeply inside of the hypernucleus and achieving sub-MeV energy resolution. The E05-115 experiment, which was successfully performed in 2009, is the third generation hypernuclear experiment in JLab Hall C. A new splitter magnet and electron spectrometer were installed, and beam energy of 2.344 GeV was selected in this experiment. These new features gave better field uniformity, optics quality and made the ?tilt method? more effective in improving yield-to-background ratio. The magnetic optics of the spectrometers were carefully studied with GEANT simulation, and corrections were applied to compensate for the fringe field cross talk between the compact spectrometer magnets. The non-linear least chi-squared method was used to further calibrate the spectrometer with the events from Lambda, Sigma0 and B12Lambda and uniform magnetic optics as well as precise kinematics were achieved. Several p-shell Lambda hypernuclear spectra, including B12Lambda, Be10Lambda, He7Lambda, were obtained with high energy resolution and good accuracy. For B12Lambda, eight peaks were recognized with the resolution of ~540keV (FWHM), and the ground state binding energy was obtained as 11.529 0.012(stat.) 0.110(syst.) MeV. Be10Lambda, twelve peaks were recognized with the resolution of ~520keV (FWHM), and the binding energy of the ground state was determined as 8.710 0.059(stat.) 0.114(syst.) MeV. For He7Lambda, three peaks were recognized with the resolution of ~730keV, and the ground state binding energy was obtained as 5.510 0.050(stat.) 0.120(syst.) MeV. Compared with the published data of B12Lambda from the JLab Hall A experiment, four extra peaks were fitted and interpreted thanks to the highest ever energy resolution and sufficient statistics. The determined binding energy of Be10Lambda provides new information on charge symmetry breaking effect in the Lambda-N interaction. Compared with the results of He7Lambda from the E01-011 experiment, the ground state position is consistent with 4 times more statistics, and two extra peaks corresponding to excited states were recognized.

Chen, Chunhua [Hampton University

2014-08-01T23:59:59.000Z

8

64 IRE TRANSACTIONS ON ENGINEERING MANAGEMENT July Systenas Engineering-Key to Modern Development  

E-Print Network (OSTI)

to ascertain the current output of this phase is the creative idea that marks the status of systems engineering64 IRE TRANSACTIONS ON ENGINEERING MANAGEMENT July Systenas Engineering-Key to Modern Development, integration, emphasis on the field of systems engineering. Though and evaluation. In a sense, these terms

Rhoads, James

9

Prediction of Ocular Irritancy of 26 Chemicals and 26 Cosmetic Products with Isolated Rabbit Eye (IRE) Test  

Science Journals Connector (OSTI)

Objective This study aims to establish and evaluate the methodology of isolated rabbit eye (IRE) test. Methods IRE test was performed according to modifications of the in vitro toxicology (INVITTOX) Protocol No.85: Rabbit enucleated eye test by European Centre for the Validation of Alternative Methods (ECVAM), and then 26 chemicals and 26 cosmetic products were tested in both in vitro IRE and in vivo Draize tests. A statistical analysis was conducted to determine the relevance of the IRE test to the data generated in the Draize test. Results IRE test was established successfully in our laboratory. It was shown that ranking correlation and class concordance were fairly well between the IRE test and the Draize test for 26 reference chemicals (Fisher's Exact Test ?2=51.314, P<0.001; McNemar P=0.261; Gamma=0.960, P<0.001; Kappa=0.843, P<0.001) and 26 cosmetic products (Fisher's Exact Test ?2=15.522, P<0.001; McNemar P=0.311; Gamma=0.967, P<0.001; Kappa=0.611, P<0.001). Conclusion IRE test was established successfully for in vitro testing of eye irritation as an alternative to Draize test.

Xiang GUO; Xing Fen YANG; Ying YANG; Raabe HANS; Jing Heng CAI; Jin Yu XUE; Xiao Hua TAN; Xiao Ping XIE; Xi Kun XIONG; Jun Ming HUANG

2012-01-01T23:59:59.000Z

10

Pontotoc Co. Greene Co. Hale Co. OAK GROVE C OAL D EGAS CEDAR COVE COAL DEGAS  

U.S. Energy Information Administration (EIA) Indexed Site

COAL DEGAS COAL DEGAS BLU E CREEK COAL DEGAS BR OOKWOOD C OAL D EGAS ST AR ROBIN SONS BEND COAL DEGAS BLU FF COR INNE MOU NDVILLE COAL DEGAS BLU EGU T CR EEK WH ITE OAK CREEK COAL DEGAS BEAVERT ON BLU FF FAYETTE W SN EAD S CREEK SPLU NGE PAR HAM N MUSGR OVE CR EEK MCCRAC KEN MOU NTAIN DAVIS C HAPEL BAC ON BLOOMING GROVE MT Z ION FAIRVIEW JASPER BLOWHORN CREEK MAPLE BRAN CH KEN NEDY COAL F IRE CR EEK MCGEE LAKE SILOAM MILLPOR T FERNBANK DAVIS C HAPEL NE DETROIT E BEANS F ERRY LEXIN GT ON PET ERSON COAL DEGAS CALEDONIA ABERD EEN HOL T COAL DEGAS MULDON ELD RIDGE MCKINLEY CREEK TREBLOC HEARTLIN E SH ANNON TROY_MS_D BOXES CREEK WISE GAP NOR THSID E TREMONT VAN VLEET HOL LY BET HEL CHU RCH ABERD EEN S ST RONG BAN KST ON MOLLOY WR EN COR INT H WELLS THORN REID REID HOU STON ST AR DEERLICK CR EEK C OAL DEGAS OAK GROVE C OAL D EGAS BIG SANDY C REEK COAL D EGAS MABEN LITT LE SAND Y CREEK COAL DEGAS

11

Blanchard Cr JohnsonGulch  

E-Print Network (OSTI)

Cr MeadowCr Min eral Cr BeaverCr StonewallCr Blackfoot Rive r Blackfoot River Dun hamCr North Ketchikan Cr NFkFl a theadRiver N FkFla th ead River SageCr Akokal a Cr AkokalaCr W h ale Cr Bo w m a n Cr N

12

Blanchard Cr West Fk Clearwater R  

E-Print Network (OSTI)

Con norC r SullivanCr Ball Cr Addition Cr Bunker Cr M iddle Fork Cr Bu nker Cr Big Salmon Cr H olbrook

13

Pontotoc Co. Greene Co. Hale Co. OAK GROVE C OAL D EGAS CEDAR COVE  

U.S. Energy Information Administration (EIA) Indexed Site

COAL D EGAS BLU E CREEK COAL DEGAS BR OOKWOOD C OAL D EGAS ST AR ROBIN SONS BEND COAL D EGAS BLU FF COR INNE MOU NDVILLE COAL D EGAS BLU EGU T CR EEK WH ITE OAK CREEK COAL DEGAS BEAVERT ON BLU FF FAYETTE W SN EAD S CREEK SPLU NGE PAR HAM N MUSGR OVE CR EEK MCCRAC KEN MOU NTAIN DAVIS C HAPEL BAC ON BLOOMING GROVE MT Z ION FAIRVIEW JASPER BLOWHORN CREEK MAPLE BRAN CH KEN NEDY COAL F IRE CR EEK MCGEE LAKE SILOAM MILLPOR T FERNBANK DAVIS C HAPEL NE DETROIT E BEANS F ERRY LEXIN GT ON PET ERSON COAL D EGAS CALEDONIA ABERD EEN HOL T COAL D EGAS MULDON ELD RIDGE MCKINLEY CREEK TREBLOC HEARTLIN E SH ANNON TROY_MS_D BOXES CREEK WISE GAP NOR THSID E TREMONT VAN VLEET HOL LY BET HEL CHU RCH ABERD EEN S ST RONG BAN KST ON MOLLOY WR EN COR INTH WELLS THORN REID REID HOU STON ST AR DEERLICK CREEK COAL D EGAS OAK GROVE COAL D EGAS BIG SANDY CREEK COAL D EGAS MABEN LITT LE SAND Y CREEK COAL D

14

CR TELECOMMUNICATIONS STANDARDS TELECOMMUNICATIONS  

E-Print Network (OSTI)

CR TELECOMMUNICATIONS STANDARDS TELECOMMUNICATIONS STANDARDS Published JANUARY 2002 January 2002 Page 1 of 137 #12;CR TELECOMMUNICATIONS STANDARDS January 2002 Page 2 of 137 FOREWARD Approval to CR Telecommunications Standards. · The format of this document has been changed to resemble

California at Davis, University of

15

CR Telecommunications Standards January 2006 Cr.ucdavis.edu  

E-Print Network (OSTI)

CR Telecommunications Standards January 2006 Cr.ucdavis.edu TELECOMMUNICATIONS STANDARDS Published JANUARY 2006 #12;CR Telecommunications Standards January 2006 Page 2 of 207 Foreword Approval&E) and their design consultants. Documents Superseded · This standard replaces the CR Telecommunications Standards

California at Davis, University of

16

MA 125-4 CR PH 105-4 CR  

E-Print Network (OSTI)

490-3 CR Mechanical Engineering Design I I Proj Lab Proj Lab MA 125-4 CR Calculus I or Equivalent M MEMA 125-4 CR Calculus I or Equivalent PH 105-4 CR Gen Physics with Calculus MA 126-4 CR Calculus I I or Equivalent M Required Course Elective Course Prerequisite NS M W LAB Proj Lab Natural Science Mathematics

Carver, Jeffrey C.

17

NUREG/CR-6853  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

NUREG/CR-6853 Comparison of Average Transport and Dispersion Among a Gaussian, a Two-Dimensional, and a Three-Dimensional Model Lawrence Livermore National Laboratory U.S. Nuclear Regulatory Commission Office of Nuclear Regulatory Research Washington, DC 20555-0001 NUREG/CR-6853 Comparison of Average Transport and Dispersion Among a Gaussian, a Two-Dimensional, and a Three-Dimensional Model Manuscript Completed: October 2004 Date Published: October 2004 Prepared by C.R. Molenkamp (LLNL), N.E. Bixler, C.W. Morrow (SNL), J.V. Ramsdell, Jr., (PNNL), J.A. Mitchell (NRC) Atmospheric Science Division Sandia National Laboratories Lawrence Livermore National Laboratory Albuquerque, NM 87185-0748 Livermore, CA 94550

18

Oxidation behavior of Cr-Cr{sub 2}Nb alloys  

SciTech Connect

Oxidation of hypoeutectic Cr-Cr{sub 2}Nb alloys containing 6 and 12% Nb at 950 C resulted in formation of a multiproduct scale consisting of a continuous Cr{sub 2}O{sub 3} outer layer and an inner region of discrete CrNbO{sub 4} products interspersed with Cr{sub 2}O{sub 3}. Overall oxidation behavior resembled that of Cr as reactions with the Cr-rich phase tended to dominate. Oxidation resistance, in terms of reaction kinetics and scale adherence, increased with increasing volume fraction of the Cr-Cr{sub 2}Nb eutectic phase. A model for the oxidation of these alloys based on the growth of Cr{sub 2}O{sub 3} on the Cr-rich matrix regions and the formation of a slower growing CrNbO{sub 4} on the Cr{sub 2}Nb-enriched phase can qualitatively explain the development of the multiproduct scale and the observed gravimetric and spallation results. Possible microstructural/compositional modifications to improve oxidation resistance are suggested.

Tortorelli, P.F.; Pint, B.A.

1996-12-31T23:59:59.000Z

19

Nanoscale Phase Separation In Epitaxial Cr-Mo and Cr-V Alloy...  

NLE Websites -- All DOE Office Websites (Extended Search)

Separation In Epitaxial Cr-Mo and Cr-V Alloy Thin Films Studied Using Atom Probe Tomography: Comparison Of Nanoscale Phase Separation In Epitaxial Cr-Mo and Cr-V Alloy Thin Films...

20

Tracking Hexavalent Cr in Groundwater  

Science Journals Connector (OSTI)

...Soils, U.S. EPA Ground Water Issue Paper, EPA...Reactive Barriers: Remediation of Chlorinated and...Cr-52 drinking water geochemistry ground water hexavalent chromium...pump-and-treat remediation stable isotopes toxic...

David Blowes

2002-03-15T23:59:59.000Z

Note: This page contains sample records for the topic "ire cr eek" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Improvement of SOFC Electrodes through Catalyst Infiltration & Control of Cr Volatilization from FeCr Components  

SciTech Connect

This presentation discusses the improvement of SOFC electrodes through catalyst infiltration and control of Cr volatilization from FeCr components.

Visco, S.J.; Jacobson, C.; Kurokawa, H.; Sholklapper, T.; Lu, C.; De Jonghe, L.

2005-01-28T23:59:59.000Z

22

CR  

NLE Websites -- All DOE Office Websites (Extended Search)

MASSIE SANTOS BALLON MASSIE SANTOS BALLON The 5th Annual DOE Joint Genome Institute "Genomics of Energy & Environment" User Meeting started off on a provo- cative note: the first speaker, Dennis Hedgecock of the University of Southern California, compared eating an oyster to "kissing the sea on the lips." Given the meeting's focus on genomics for energy and the environment, Hedgecock was quick to note that Pacific oys- ters can annually sequester the amount of carbon equiva- lent to that produced by the African nation of Cameroon during the same period. He said researchers are interested in finding ways to boost the oyster's ability to capture carbon just as biofuels researchers are interested in using the idea of hybrid vigor to boost biomass production in energy crops.

23

CR  

NLE Websites -- All DOE Office Websites (Extended Search)

MASSIE MASSIE SANTOS BALLON The Sequencing, Finishing, Analysis in the Future Meeting first convened in Santa Fe, New Mexico five years ago. Back then, the conference title was much shorter, and the crowd in attendance much smaller. The 2006 Meeting primarily focused on genome finishing technologies and how new sequencing technologies would impact them. Over the years, the Meeting's focus has moved from simply genome finishing to how next genera- tion sequencing technologies have affected genomics over- all in assembly, finishing, annotation and analysis. Claire Fraser-Liggett sum- marized the current state of genomic research succinctly in her opening keynote of the 5th annual meeting held June 2-4, 2010: "We're not in Kansas anymore, and yet we are." Addressing a record crowd of 250 attendees, Fraser- Liggett discussed current sequencing technologies and applications

24

I. NANOSCIENCE COURSE REQUIREMENTS CR A. Communication Skills (8 cr.) CR APSC-101 Applied Science Profession I 1 ENGL-101 Freshman English Composition Required OR 3  

E-Print Network (OSTI)

I. NANOSCIENCE COURSE REQUIREMENTS CR A. Communication Skills (8 cr.) CR APSC-101 Applied Science OF SCIENCE Concentration in Nanoscience University of Wisconsin-Stout 2010-2011 #12;I. MATERIALS SCIENCE

Wu, Mingshen

25

Thermodynamics of Cr2O3, FeCr2O4, ZnCr2O4 and CoCr2O4  

SciTech Connect

High temperature heat capacity measurements were obtained for Cr{sub 2}O{sub 3}, FeCr{sub 2}O{sub 4}, ZnCr{sub 2}O{sub 4} and CoCr{sub 2}O{sub 4} using a differential scanning calorimeter. These data were combined with previously-available, overlapping heat capacity data at temperatures up to 400 K and fitted to 5-parameter Maier-Kelley C{sub p}(T) equations. Expressions for molar entropy were then derived by suitable integration of the Maier-Kelley equations in combination with recent S{sup o}(298) evaluations. Finally, a database of high temperature equilibrium measurements on the formation of these oxides was constructed and critically evaluated. Gibbs energies of Cr{sub 2}O{sub 3}, FeCr{sub 2}O{sub 4} and CoCr{sub 2}O{sub 4} were referenced by averaging the most reliable results at reference temperatures of 1100, 1400 and 1373 K, respectively, while Gibbs energies for ZnCr{sub 2}O{sub 4} were referenced to the results of Jacob [Thermochim. Acta 15 (1976) 79-87] at 1100 K. Thermodynamic extrapolations from the high temperature reference points to 298.15 K by application of the heat capacity correlations gave {Delta}{sub f}G{sup o}(298) = -1049.96, -1339.40, -1428.35 and -1326.75 kJ mol{sup -1} for Cr{sub 2}O{sub 3}, FeCr{sub 2}O{sub 4}, ZnCr{sub 2}O{sub 4} and CoCr{sub 2}O{sub 4}, respectively.

Ziemniak SE, Anovitz LM, Castelli RA, Porter WD

2007-01-09T23:59:59.000Z

26

SEM CR GRADE Intro to Chem Eng 1  

E-Print Network (OSTI)

SEM CR GRADE 4 PHYS 408 Physics 2 First Year Sophomore Year Junior Year Senior Year Fall__ Spring__ Fall__ Spring__ Fall__ Spring__ Fall__ Spring__ SEM CR GRADE 3 CHEM 683 Physical Chemistry 1 SEM CR Discovery 1 Fine Arts SEM CR GRADE 4 Discovery 2 Humanities SEM CR GRADE 4 MATH 644 Statistics for Engineers

Pringle, James "Jamie"

27

Watermelon-like iron nanoparticles: Cr doping effect on magnetism...  

NLE Websites -- All DOE Office Websites (Extended Search)

Watermelon-like iron nanoparticles: Cr doping effect on magnetism and magnetization interaction reversal. Watermelon-like iron nanoparticles: Cr doping effect on magnetism and...

28

Midea: ENERGY STAR Referral (MWF-08CR)  

Energy.gov (U.S. Department of Energy (DOE))

DOE referred the matter of Westpointe-brand room air conditioner model MWF-08CR to the EPA for appropriate action after DOE testing showed that the model does not meet the ENERGY STAR specification.

29

UCRL-CR-117755 B239746  

Office of Scientific and Technical Information (OSTI)

CR-117755 B239746 Direct Calibration of the Yield of Nuclear Explosion Keith Nakanishi Alexi Nikolayev June 1994 DISCLAIMER This document was prepared as an account of w o r k...

30

CR-B-02-02.PUB  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

CR-B-02-02 CR-B-02-02 AUDIT REPORT U.S. DEPARTMENT OF ENERGY OFFICE OF INSPECTOR GENERAL OFFICE OF AUDIT SERVICES PROCUREMENT ADMINISTRATION AT BROOKHAVEN NATIONAL LABORATORY AUGUST 2002 U. S. DEPARTMENT OF ENERGY Washington, DC 20585 August 22, 2002 MEMORANDUM FOR THE ACTING MANGER, CHICAGO OPERATIONS OFFICE FROM: Rickey R. Hass, Director (Signed) Science, Energy, Technology, and Financial Audits Office of Audit Services Office of Inspector General SUBJECT: INFORMATION: Audit Report on "Procurement Administration at

31

Triplet pair correlations and nonmonotonic supercurrent decay with Cr thickness in Nb/Cr/Fe/Nb Josephson devices  

E-Print Network (OSTI)

roughness and interdiffusion, an antiferromagnetic spin density wave (SDW) state can still form in Cr close to the interface. Here, we show evidence for triplet pair correlations in Josephson junctions with Cr/Fe and Cr/Fe/Cr barriers. Although the exact...

Robinson, J. W. A.; Banerjee, N.; Blamire, M. G.

2014-03-05T23:59:59.000Z

32

CR-B-02-01.PDF  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

CR-B-02-01 CR-B-02-01 AUDIT REPORT FIXED-PRICE CONTRACTING FOR DEPARTMENT OF ENERGY CLEANUP ACTIVITIES OCTOBER 2001 U.S. DEPARTMENT OF ENERGY OFFICE OF INSPECTOR GENERAL OFFICE OF AUDIT SERVICES October 15, 2001 MEMORANDUM FOR THE ASSISTANT SECRETARY, OFFICE OF ENVIRONMENTAL MANAGEMENT FROM: Phillip L. Holbrook (Signed) Deputy Inspector General for Audit Services Office of Inspector General SUBJECT: INFORMATION: Audit Report on "Fixed-Price Contracting for Department of Energy Cleanup Activities" BACKGROUND As part of its Contract Reform effort, the Department of Energy (Department) acted to increase its use of

33

Morphology, deformation, and defect structures of TiCr{sub 2} in Ti-Cr alloys  

SciTech Connect

The morphologies and defect structures of TiCr{sub 2} in several Ti-Cr alloys have been examined by optical metallography, x-ray diffraction, and transmission electron microscopy (TEM), in order to explore the room-temperature deformability of the Laves phase TiCr{sub 2}. The morphology of the Laves phase was found to be dependent upon alloy composition and annealing temperature. Samples deformed by compression have also been studied using TEM. Comparisons of microstructures before and after deformation suggest an increase in twin, stacking fault, and dislocation density within the Laves phase, indicating some but not extensive room-temperature deformability.

Chen, K.C.; Allen, S.M.; Livingston, J.D.

1992-12-31T23:59:59.000Z

34

NUREG/CR-6870 Consideration of Geochemical  

E-Print Network (OSTI)

in Groundwater Restoration at Uranium In-Situ Leach Mining Facilities Manuscript Completed: December 2006 Date associated with uranium mining sites throughout the United States are also included in this report. A tableNUREG/CR-6870 Consideration of Geochemical Issues in Groundwater Restoration at Uranium In

35

Femtosecond Cr:LiSAF and Cr:LiCAF lasers pumped by tapered diode lasers  

Science Journals Connector (OSTI)

We report compact, low-cost and efficient Cr:Colquiriite lasers that are pumped by high brightness tapered laser diodes. The tapered laser diodes provided 1 to 1.2 W of output power...

Demirbas, Umit; Schmalz, Michael; Sumpf, Bernd; Erbert, Gtz; Petrich, Gale S; Kolodziejski, Leslie A; Fujimoto, James G; Krtner, Franz X; Leitenstorfer, Alfred

2011-01-01T23:59:59.000Z

36

Cr-doped scandium borate laser  

DOE Patents (OSTI)

A broadly wavelength-tunable laser is provided which comprises as the laser medium a single crystal of MBO.sub.3 :Cr.sup.3+, where M is selected from the group of Sc, In and Lu. The laser may be operated over a broad temperature range from cryogenic temperatures to elevated temperatures. Emission is in a spectral range from red to infrared, and the laser is useful in the fields of defense, communications, isotope separation, photochemistry, etc.

Chai, Bruce H. (Bridgewater, NJ); Lai, Shui T. (Florham Park, NJ); Long, Margaret N. (Landing, NJ)

1989-01-01T23:59:59.000Z

37

Carbon migration in 5Cr-0.5Mo/21Cr-12Ni dissimilar metal welds  

SciTech Connect

The carbon migration between a ferritic steel and an austenitic steel was studied in submerged arc-welded 5Cr-0.5Mo/21Cr-12Ni dissimilar metal welds (DMWs) after aging at 500 C for various times and after long-term service in technical practice. The distribution of carbon, chromium, nickel, and iron in the areas around the weld interface was determined by electron probe microanalysis, and the microstructural aspect in the carbon-depleted/enriched zone was characterized by optical microscopy and transmission electron microscopy (TEM). Furthermore, the precipitation sequences and composition characteristics of the carbides were identified by diffraction pattern microanalysis and energy-dispersive X-ray (EDX) microanalysis. It was found (1) that there exists a coherent relationship between intracrystalline M{sub 23}C{sub 6} and the austenitic matrix; (2) that the composition of M{sub 23}C{sub 6} in the carbon-enriched zone is independent of the duration of aging and service; (3) that the maximum carbon concentration is determined by the carbide type, the composition characteristic of precipitated carbides, and the concentration of carbide-forming Cr adjacent to the weld interface in the carbon-enriched zone; and (4) that the carbon migration in the 5Cr-0.5Mo/21Cr-12Ni DMWs can be described by a diffusion model.

Huang, M.L.; Wang, L. [Dalian Univ. of Technology (China). Dept. of Materials Engineering

1998-12-01T23:59:59.000Z

38

The following 24 credits are required. Course Cr Semester Course Cr Semester  

E-Print Network (OSTI)

Fundamentals of Pest Management 3 Soil and Water Science Minor 15 credits required Course Cr Required SWS Agriculture & Environmental Quality 3 SWS2007 World of Water 3 SWS2008 Humans, Soils, & Environmental Impact 3 SWS3023L Soil Judging 2 SWS4116 Environmental Nutrient Management 3 SWS4223 Environmental

Watson, Craig A.

39

Microsoft Word - CR-AH Policy.doc  

NLE Websites -- All DOE Office Websites (Extended Search)

laboratory and User safety along with User efficiency. After- Hours work inside the cleanroom (CR-AH) is an access privilege that requires deliberate selection of requested Users...

40

Using CrAIN Multilayer Coatings to Improve Oxidation Resistance...  

NLE Websites -- All DOE Office Websites (Extended Search)

Coatings to Improve Oxidation Resistance of Steel Interconnects for Solid Oxide Fuel Cell Stacks. Using CrAIN Multilayer Coatings to Improve Oxidation Resistance of Steel...

Note: This page contains sample records for the topic "ire cr eek" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

CR mammography: Design and implementation of a quality control program  

SciTech Connect

Despite the recent acquisition of significant quantities of computed radiography CR equipment for mammography, Mexican regulations do not specify the performance requirements for digital systems such as those of CR type. The design of a quality control program QCP specific for CR mammography systems was thus considered relevant. International protocols were taken as reference to define tests, procedures and acceptance criteria. The designed QCP was applied in three CR mammography facilities. Important deficiencies in spatial resolution, noise, image receptor homogeneity, artifacts and breast thickness compensation were detected.

Moreno-Ramirez, A.; Brandan, M. E.; Villasenor-Navarro, Y.; Galvan, H. A.; Ruiz-Trejo, C. [Instituto de Fisica, Universidad Nacional Autonoma de Mexico, DF 04510 (Mexico); Departamento de Radiodiagnostico, Instituto Nacional de Cancerologia, DF 14080 (Mexico); Instituto de Fisica, Universidad Nacional Autonoma de Mexico, DF 04510 (Mexico)

2012-10-23T23:59:59.000Z

42

Large half-metallic gap in ferromagnetic semi-Heusler alloys CoCrP and CoCrAs  

SciTech Connect

We investigate the electronic structure and magnetism of semi-Heusler alloys CoCrP and CoCrAs using the full-potential linearized augmented plane wave method. The calculations reveal that CoCrP and CoCrAs are half-metallic (HM) ferromagnets with the same magnetic moment of 2.00 {mu}{sub B} per formula unit. Both alloys have large half-metallic gaps (up to 0.50 eV) and wide band gaps (above 1 eV). The half-metallicity of CoCrP and CoCrAs can be retained even when their lattice constants are changed by -4.8% to 6.6% and -7.7% to 4.5%, respectively. The two alloys show great promise in the applications of spin valve and magnetic tunnel junction.

Yao Zhongyu [School of Physics and Electronic Engineering, Hainan Normal University, Haikou 571158 (China); Zhang, Y. S. [School of Physics, Huazhong University of Science and Technology, Wuhan 430074 (China); Yao, K. L. [School of Physics, Huazhong University of Science and Technology, Wuhan 430074 (China); International Center of Materials Physics, Chinese Academy of Science, Shenyang 110015 (China)

2012-08-06T23:59:59.000Z

43

Risk-assessment-methodology development for waste isolation in geologic media. Technical review of documents NUREG/CR-0394, NUREG/CR-0424, NUREG/CR-0458  

SciTech Connect

A review of five documents that were prepared for the USNRC by Sandia Laboratories is presented in this report. The documents covered in the present review include: NUREG/CR-1262, NUREG/CR-1376, NUREG/CR-1377, NUREG/CR-1397 and NUREG/CR-1608. This constitutes the second phase of the review; the first phase was reported in Volume 1 of NUREG/CR-1672, November 1980. Two of the documents concern simplified computational methods illustrative of the calculations necessary to produce a response surface. Three of the reports pertain to statistical methods, including the application of Latin hypercube Sampling (LHS). The following observations have been made relative to the above reports: (1) the reports are, in general, difficult to read, due, in part, to unnecessarily complicated notation and lack of adequate explanation and examples, (2) the relationship of the work to similar work in the US and abroad is not discussed, and (3) limitations of the LHS method are not discussed in sufficient depth. The Sandia's response to this review is published as NUREG/CR-2428. Volume 1 is scheduled for completion in June 1982.

Stevens, C.A.; Fullwood, R.R.; Basin, S.L.

1980-11-01T23:59:59.000Z

44

Spectroscopic properties of Cr-doped melilite crystals  

Science Journals Connector (OSTI)

?Four kinds of Cr-droped melilite crystals, Ca2MgSi2O7 (akermanite), CaAl2SiO7 (gehlenite), CaGa2SiO7 (Ga-gehlenite) and CaGa2GeO7 (GaGe-gehlenite), with different sizes of the sites for Cr ions to substitute, we...

Akiko Sugimoto; Yukio Nobe; Takafumi Yamazaki

1997-07-01T23:59:59.000Z

45

NUREG/CR-6911 Tests of Uranium (VI) Adsorption  

E-Print Network (OSTI)

NUREG/CR-6911 Tests of Uranium (VI) Adsorption Models in a Field Setting U.S. Geological Survey U/CR-6911 Tests of Uranium (VI) Adsorption Models in a Field Setting Manuscript Completed: August 2006 Date Published: August 2006 Prepared by G. P. Curtis, J. A. Davis Water Resources Division U.S. Geological Survey

46

CR-L-01-06.PDF  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

8, 2001 8, 2001 MEMORANDUM FOR THE SECRETARY FROM: Gregory H. Friedman (Signed) Inspector General SUBJECT: INFORMATION: Federal Managers' Financial Integrity Act Audit Report Audit Report No.: CR-L-01-06 We reviewed the Department of Energy's (Department) progress in implementing the Federal Managers' Financial Integrity Act (FMFIA) of 1982. The review was made to assist you in determining whether the evaluations of the systems of management, accounting, and administrative controls were carried out in a reasonable and prudent manner by the Department for Fiscal Year 2000. The Department's evaluation of its control systems was examined for compliance with requirements of the FMFIA, the General Accounting Office's "Standards for Internal Control in the Federal Government," Office of Management and Budget Circulars

47

The electrical resistance of Cr films  

Science Journals Connector (OSTI)

Measurements of the thickness dependence of the electrical resistance of two very thin Cr films deposited at substrate temperatures of 385 and 360?C and pressures of 410? 7 and 10? 6 Torr are reported. Preliminary measurements of the thickness dependence of the Nel temperature (T N ) of the film deposited at 360?C at thicknesses ?10 nm are also presented. In these two films the resistance in the thickness region 2?d?7.5 nm can be very well described by R?[(d/d c )? 1 ]?t with d c equal to 1.640.20 and 1.030.20 nm respectively and t=1.340.11. The Nel temperatures show a turning point around 14 nm in agreement with the known thickness dependence of the stress. d T N /d S t has been found to be ?100 K/kbar where S t is the internal tensile stress in the film.

J. A. J. Lourens; S. Arajs; H. F. Helbig; L. Cheriet; El?Sayed A. Mehanna

1988-01-01T23:59:59.000Z

48

PARS II Change Request (CR) Form  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Title: Phone #: Office/Symbol: Email: CHANGE TYPE: Defect: New Requirement: PRIORITY: PARS II Change Request Form (APR 2011) PARS II Change Request (CR) Form 1 = Prevents the accomplishment of an essential PARS-II capability 3 = Adversely affects the accomplishment of an essential PARS-II capability, but a work-around solution is known 4 = Results in User / Operator inconvenience or annoyance, but does not affect an essential PARS-II capability 5 = Any other effect 1) Detailed description of problem/need. (If possible, provide project #(s) you are working with). PROBLEM/CHANGE DESCRIPTION: 2) Where in system defect is seen or where new functionality is required (i.e., which screen, which report). Screenshots (as separate attachments) are helpful.

49

Audit Report: CR-FS-97-02 | Department of Energy  

Office of Environmental Management (EM)

CR-FS-97-02 Audit Report: CR-FS-97-02 May 1, 1997 Audit of the Department of Energy's Consolidated Financial Statements for Fiscal Year 1996 Audit Report: CR-FS-97-02 More...

50

An Internet research project draws conservative ire  

Science Journals Connector (OSTI)

...administration's targeting of conservatives. The Free Beacon story, for example, says NSF is financing the creation of a web service that will monitor suspicious memes and what it considers false and misleading ideas, with a major focus...

Jeffrey Mervis

2014-11-07T23:59:59.000Z

51

9 Cr-- 1 Mo steel material for high temperature application  

DOE Patents (OSTI)

One or more embodiments relates to a high-temperature, titanium alloyed, 9 Cr-1 Mo steel exhibiting improved creep strength and oxidation resistance at service temperatures up to 650.degree. C. The 9 Cr-1 Mo steel has a tempered martensite microstructure and is comprised of both large (0.5-3 .mu.m) primary titanium carbides and small (5-50 nm) secondary titanium carbides in a ratio of. from about 1:1.5 to about 1.5:1. The 9 Cr-1 Mo steel may be fabricated using exemplary austenizing, rapid cooling, and tempering steps without subsequent hot working requirements. The 9 Cr-1 Mo steel exhibits improvements in total mass gain, yield strength, and time-to-rupture over ASTM P91 and ASTM P92 at the temperature and time conditions examined.

Jablonski, Paul D; Alman, David; Dogan, Omer; Holcomb, Gordon; Cowen, Christopher

2012-11-27T23:59:59.000Z

52

TI--CR--AL--O thin film resistors  

DOE Patents (OSTI)

Thin films of Ti--Cr--Al--O are used as a resistor material. The films are rf sputter deposited from ceramic targets using a reactive working gas mixture of Ar and O.sub.2. Resistivity values from 10.sup.4 to 10.sup.10 Ohm-cm have been measured for Ti--Cr--Al--O film <1 .mu.m thick. The film resistivity can be discretely selected through control of the target composition and the deposition parameters. The application of Ti--Cr--Al--O as a thin film resistor has been found to be thermodynamically stable, unlike other metal-oxide films. The Ti--Cr--Al--O film can be used as a vertical or lateral resistor, for example, as a layer beneath a field emission cathode in a flat panel display; or used to control surface emissivity, for example, as a coating on an insulating material such as vertical wall supports in flat panel displays.

Jankowski, Alan F. (Livermore, CA); Schmid, Anthony P. (Solana Beach, CA)

2000-01-01T23:59:59.000Z

53

Precipitates in a Cr(VI)-Contaminated Concrete  

Science Journals Connector (OSTI)

The composition, determined by energy-dispersive X-ray spectroscopy, morphology, and d spacings, measured by electron diffraction, identifies these crystals as chromate enriched ettringite (Ca6Al2((S,Cr)O4)2(OH)1226H2O) with the mole fraction of CrO42- in the SO42- position being 0.41 and 0.72. ... Some of these crystals appear to be pseudomorphs of ettringite. ... The CrO42--hydrocalumite crystals are coated with smaller acicular crystals that are most likely solid solutions between Si-ettringite (Ca6Al2(SiO3)3(OH)1226H2O) and CrO42--ettringite. ...

Carl D. Palmer

2000-09-01T23:59:59.000Z

54

Polarized neutron reflectometry of Fe/Cr/Gd superlattices  

Science Journals Connector (OSTI)

The magnetic structure of Fe/Cr/Gd superlattices is investigated using complementary methods of SQUID magnetometry and polarized neutron reflectometry. The complex magnetic behavior of the given...d (Fe) and 4f (...

M. V. Ryabukhina; E. A. Kravtsov

2014-09-01T23:59:59.000Z

55

Phase stability and elastic properties of Cr-V alloys  

SciTech Connect

V is the only element in the periodic table that forms a complete solid solution with Cr and thus is particularly important in alloying strategy to ductilize Cr. This study combines first-principles density functional theory calculations and experiments to investigate the phase stability and elastic properties of CrV binary alloys. The cluster expansion study reveals the formation of various ordered compounds at low temperatures that were not previously known. These compounds become unstable due to the configurational entropy of bcc solid solution as the temperature is increased. The elastic constants of ordered and disordered compounds are calculated at both T = 0 K and finite temperatures. The overall trends in elastic properties are in agreement with measurements using the resonant ultrasound spectroscopy method. The calculations predict that addition of V to Cr decreases both the bulk modulus and the shear modulus, and enhances the Poissons ratio, in agreement with experiments. Decrease in the bulk modulus is correlated to decrease in the valence electron density and increase in the lattice constant. An enhanced Poissons ratio for bcc CrV alloys (compared to pure Cr) is associated with an increased density of states at the Fermi level. Furthermore, the difference charge density in the bonding region in the (110) slip plane is highest for pure Cr and decreases gradually as V is added. The present calculation also predicts a negative Cauchy pressure for pure Cr, and it becomes positive upon alloying with V. The intrinsic ductilizing effect from V may contribute, at least partially, to the experimentally observed ductilizing phenomenon in the literature.

Gao, M. C.; Suzuki, Y.; Schweiger, H.; Do?an, .N.; Hawk, J.; Widom M.

2013-02-20T23:59:59.000Z

56

Atom probe: a direct technique for kinetic measurements. [Fe-24Cr; Fe-32Cr; Fe-28. 5Cr-10. 6Co  

SciTech Connect

The atom probe has been used to study the phase transformations occurring within the low-temperature miscibility gaps in Fe-Cr and Fe-Cr-Co alloys. The morphology of the two-phase microstructure resulting from phase separation deep within the miscibility gaps was found to be highly interconnected and charactristic of an isotropic spinodal reaction. The characteristic dimensions of the microstructure and the changes in composition were measured as a function of aging. The coarsening of the network structures could be fitted with a power law with time exponents that were significantly less than the classical Lifshitz-Slyozov-Wagner value of one-third.

Miller, M.K.; Brenner, S.S.; Camus, P.P.; Soffa, W.A.

1984-04-04T23:59:59.000Z

57

Effect of the magnetic phase transition on the charge transport in layered semiconductor ferromagnets TlCrS{sub 2} and TlCrSe{sub 2}  

SciTech Connect

TlCrS{sub 2} and TlCrSe{sub 2} crystals were synthesized by solid-state reaction. X-ray diffraction analysis showed that TlCrS{sub 2} and TlCrSe{sub 2} compounds crystallize in the hexagonal crystal system with lattice parameters a = 3.538 A, c = 21.962 A, c/a {approx} 6.207, z = 3; a = 3.6999 A, c = 22.6901 A, c/a {approx} 6.133, z = 3; and X-ray densities {rho}{sub x} = 6.705 and 6.209 g/cm{sup 3}, respectively. Magnetic and electric studies in a temperature range of 77-400 K showed that TlCrS{sub 2} and TlCrSe{sub 2} are semiconductor ferromagnets. Rather large deviations of the experimental effective magnetic moment of TlCrS{sub 2} (3.26 {mu}{sub B}) and TlCrSe{sub 2} (3.05 {mu}{sub B}) from the theoretical one (3.85 {mu}{sub B}) are attributed to two-dimensional magnetic ordering in the paramagnetic region of strongly layered ferromagnets TlCrS{sub 2} and TlCrSe{sub 2}. The effect of the magnetic phase's transition on the charge transport in TlCrS{sub 2} and TlCrSe{sub 2} is detected.

Veliyev, R. G.; Sadikhov, R. Z.; Kerimova, E. M., E-mail: ekerimova@physics.ab.az; Asadov, Yu. G.; Jabbarov, A. I. [Azerbaijan National Academy of Sciences, Institute of Physics (Azerbaijan)

2009-09-15T23:59:59.000Z

58

Grain boundary depletion and migration during selective oxidation of Cr in a Ni-5Cr binary alloy exposed to high-temperature hydrogenated water  

SciTech Connect

High-resolution microscopy of a high-purity Ni-5Cr alloy exposed to 360C hydrogenated water reveals intergranular selective oxidation of Cr accompanied by local Cr depletion and diffusion-induced grain boundary migration (DIGM). The corrosion-product oxide consists of a porous, interconnected network of Cr2O3 platelets with no further O ingress into the metal ahead. Extensive grain boundary depletion of Cr (to <0.05at.%) is observed typically 20100 nm wide as a result of DIGM and reaching depths of many micrometers beyond the oxidation front.

Schreiber, Daniel K.; Olszta, Matthew J.; Bruemmer, Stephen M.

2014-10-15T23:59:59.000Z

59

Nitrate Enhanced Microbial Cr(VI) Reduction-Final Report  

SciTech Connect

A major challenge for the bioremediation of radionuclides (i.e., uranium, technetium) and metals (i.e., Cr(VI), Hg) is the co-occurrence of nitrate as it can inhibit metal transformation. Denitrification (nitrate reduction to dinitrogen gas) is considered the most important ecological process. For many metal and metalloid reducing bacteria, however, ammonia is the end product through respiratory nitrate reduction (RNRA). The focus of this work was to determine how RNRA impacts Cr(VI) transformation. The goal was to elucidate the specific mechanism(s) that limits Cr(VI) reduction in the presence of nitrate and to use this information to develop strategies that enhance Cr(VI) reduction (and thus detoxification). Our central hypothesis is that nitrate impacts the biotransformation of metals and metalloids in three ways 1) as a competitive alternative electron acceptor (inhibiting transformation), 2) as a co-metabolite (i.e., concomitant reduction, stimulating transformation), and 3) as an inducer of specific proteins and pathways involved in oxidation/reduction reactions (stimulating transformation). We have identified three model organisms, Geobacter metallireducens (mechanism 1), Sulfurospirillum barnesii, (mechasism 2), and Desulfovibrio desulfuricans (mechanisms 3). Our specific aims were to 1) investigate the role of Cr(VI) concentration on the kinetics of both growth and reduction of nitrate, nitrite, and Cr(VI) in these three organisms; 2) develop a profile of bacterial enzymes involved in nitrate transformation (e.g., oxidoreductases) using a proteomic approach; 3) investigate the function of periplasmic nitrite reductase (Nrf) as a chromate reductase; and 4) develop a strategy to maximize microbial chromium reduction in the presence of nitrate. We found that growth on nitrate by G. metallireducens was inhibited by Cr(VI). Over 240 proteins were identified by LC/MS-MS. Redox active proteins, outer membrane heavy metal efflux proteins, and chemotaxis sensory proteins (Gmet_2478 and Gmet_1641) were up-regulated with exposure to Cr(VI). A nine-heme cytochrome C was purified that could reduce nitrite and could be oxidized by Cr(VI). For D. desulfuricans, we found that confirmed that Cr(VI) induced a prolonged lag period when Cr(VI) was reduced. Over three hundred proteins were unequivocally identified by LC/MS-MS and a significant number of down-regulated proteins for which the levels were changed >2 fold compared to control. Sulfite reductase levels were similar, however, nitrate and nitrite reductase were down-regulated. The supernatant of spent cultures was found to contain a filterable, heat stable compound that rapidly reduced Cr(VI). In addition, desulfoviridin was purified from nitrate grown cells and shown to have nitrite reductase activity that was inhibited by Cr(VI). For S. barnesii, periplasmic nitrate reductase (Nap), nitrite reductase (Nrf), and the metalloid reductase (Rar) were purified and characterized. The supernatant of spent cultures was also found to contain a filterable, heat stable compound that rapidly reduced Cr(VI) but that Rar also reduced Cr(VI). Our results from specific aims 1 through 3 indicate that for G. metallireducens, Cr(VI) inhibits nitrate respiration as it oxidizes cytochromes involved in nitrate respiration. Iron reduction is apparently not affected and the inhibitory affects of Cr(VI) may be attenuated by the addition of sufficient Fe(III) to generate Fe(II) that abiotically reduces the chromium. For S. barnesii, although the enzyme assays indicate that the components of the respiratory pathway for nitrate (e.g. Nap and Nrf) are inhibited by chromate, the organism has a mechanism to prevent this from actually occurring. Our current hypothesis is that the non-specific metalloid reductase (Rar) is providing resistance by reducing the Cr(VI). The strategy here would be to enhance its growth and metabolism in the natural setting. Lactate is a suitable electron donor for S. barnesii but other donors are possible. Although the version of the Phylochip used for monitoring the microb

John F. Stolz

2011-06-15T23:59:59.000Z

60

Metastable bcc phase formation in the Nb-Cr system  

SciTech Connect

Extended metastable bcc solid solutions of Nb-Xat.%Cr (X = 35, 50, 57, 77, 82, and 94) were synthesized by two-anvil splat-quenching. In addition, bcc (Nb-67at.%Cr) was prepared by mechanically alloying mixtures of niobium and chromium powders. The lattice parameters were measured by X-ray diffraction and the Young`s moduli were measured by low-load microindentation. The composition dependence of the lattice parameters and elastic moduli show a positive deviation with respect to a rule of mixtures. During continuous heating at 15C/min., the metastable precursor bcc phases decomposed at temperatures above 750C to uniformly refined microstructures.

Thoma, D.J.; Schwarz, R.B. [Los Alamos National Lab., NM (United States); Perepezko, J.H. [Wisconsin Univ., Madison, WI (United States). Dept. of Materials Science and Engineering; Plantz, D.H. [Coast Guard Academy, New London, CT (United States). Dept. of Engineering

1993-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "ire cr eek" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
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61

Cascade Locks Wahtum LakeWahtum Lake  

E-Print Network (OSTI)

Cliff -- BJO Mesic Lowlands Conifer-Hardwood Forest -- BE, NSO Montane Mixed Conifer Forest -- NSOCreek Casey Creek Slide Creek Indian Cr eek USDA Forest Service USFS - Columbia Gorge Scenic Area Wilderness State Hood River County Hood River County Forest Private S.D.S. Co. LLC Other Columbia River Gorge

62

October 2006 NASA/CR-2006-214298  

E-Print Network (OSTI)

October 2006 NASA/CR-2006-214298 NIA Report No. 2006-01 A High-Level Formalization of Floating of Aerospace, Hampton, Virginia #12;The NASA STI Program Office . . . in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA Scientific and Technical

Muñoz, César A.

63

Structural relaxation around substitutional Cr3+ in pyrope garnet  

E-Print Network (OSTI)

the spinel- garnet transformation -a major phase boundary in the Earth's upper mantle- to pressures as high shells of neighbors (Mg and Si) relax only partially. Site relaxation is accommodated by strain diamonds (Irifune et al. 1982). In the garnet structure (Novak and Gibbs 1971), Cr3+ is small enough

64

Aquatic Chemistry Course Id: CHEM 605 (3 cr.)  

E-Print Network (OSTI)

Aquatic Chemistry Fall 2010 Course Id: CHEM 605 (3 cr.) Lecture: TR 3:40-5:20pm, REIC 165 of this course is to introduce students to the concepts and models used in aquatic chemistry while providing-base chemistry, complexation, precipitation-dissolution and reduction-oxidation reactions. Student Learning

Wagner, Diane

65

SEM CR GRADE Intro to Chem Eng 1  

E-Print Network (OSTI)

Physics 2 First Year Sophomore Year Junior Year Senior Year Fall__ Spring__ Fall__ Spring__ Fall__ Spring__ Fall__ Spring__ SEM CR GRADE 3 CHEM 683 Physical Chemistry 1 Continuous line = prerequisite, dashed GRADE 3 CHEM 652A Organic Chemistry 2 Chemical Engineering Department University of New Hampshire

Pringle, James "Jamie"

66

Integrated Ecogenomics Study for Bioremediation of Cr(VI) at Hanford 100H Area  

E-Print Network (OSTI)

reducer isolated from the Hanford 100H site capable of Iron(study for bioremediation of Cr(VI) at Hanford 100H area RomyVI)contamination at Hanford ?? Cr(VI) highly soluble, toxic

Chakraborty, Romy

2008-01-01T23:59:59.000Z

67

Synthesis of Room-Temperature Ferromagnetic Cr-doped TiO(110...  

NLE Websites -- All DOE Office Websites (Extended Search)

Ferromagnetic Cr-doped TiO(110) Rutile Single Crystals using Ion Implantation. Synthesis of Room-Temperature Ferromagnetic Cr-doped TiO(110) Rutile Single Crystals using Ion...

68

Thermal stability and oxidation resistance of TiCrAlYO coatings...  

NLE Websites -- All DOE Office Websites (Extended Search)

stability and oxidation resistance of TiCrAlYO coatings on SS430 for solid oxide fuel cell interconnect applications. Thermal stability and oxidation resistance of TiCrAlYO...

69

Audit Report: CR-B-95-06 | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Audit Report: CR-B-95-06 June 30, 1995 Audit of Department of Energy Support Service Contracting Audit Report: CR-B-95-06 More Documents & Publications Audit Report: IG-0427...

70

Non-equilibrium synthesis of Fe-Cr-C-W alloy by laser cladding  

Science Journals Connector (OSTI)

Synthesis of Fe-Cr-C-W alloy using the laser cladding technique offered an opportunity to produce a ... and uniform microstructure. Use of preheating during laser cladding Fe-Cr-C-W provided crack-free ... carbid...

J. Choi; J. Mazumder

1994-09-01T23:59:59.000Z

71

Audit Report: CR-B-96-01 | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

6-01 Audit Report: CR-B-96-01 May 24, 1996 The Federal Energy Regulatory Commission Leased Warehouse Space Audit Report: CR-B-96-01 More Documents & Publications Semiannual Report...

72

Surface structure of ?-Cr2O3(0001) after activated oxygen...  

NLE Websites -- All DOE Office Websites (Extended Search)

Surface structure of ?-Cr2O3(0001) after activated oxygen exposure. Surface structure of ?-Cr2O3(0001) after activated oxygen exposure. Abstract: The surface structure...

73

Growth of Cr-doped TiO Films in the Rutile and Anatase Structures...  

NLE Websites -- All DOE Office Websites (Extended Search)

of Cr-doped TiO Films in the Rutile and Anatase Structures by Oxygen Plasma Assisted Molecular Beam Epitaxy . Growth of Cr-doped TiO Films in the Rutile and Anatase Structures by...

74

Excited Carrier Dynamics of ?-Cr2O3/?-Fe2O3 Core...  

NLE Websites -- All DOE Office Websites (Extended Search)

Excited Carrier Dynamics of ?-Cr2O3?-Fe2O3 Core-Shell Nanostructures. Abstract: In this work ?-Cr2O3?-Fe2O3 core-shell polycrystalline...

75

Lightest Isotope of Bh Produced Via the 209Bi(52Cr,n)260Bh Reaction  

E-Print Network (OSTI)

models. For many years, cold fusion reactions utilizingproduced via the new cold fusion reaction 209 Bi( 52 Cr,

2007-01-01T23:59:59.000Z

76

Non-classical nuclei and growth kinetics of Cr precipitates in FeCr alloys during ageing  

SciTech Connect

In this manuscript, we quantitatively calculated the thermodynamic properties of critical nuclei of Cr precipitates in FeCr alloys. The concentration profiles of the critical nuclei and nucleation energy barriers were predicted by the constrained shrinking dimer dynamics (CSDD) method. It is found that Cr concentration distribution in the critical nuclei strongly depend on the overall Cr concentration as well as temperature. The critical nuclei are non-classical because the concentration in the nuclei is smaller than the thermodynamic equilibrium value. These results are in agreement with atomic probe observation. The growth kinetics of both classical and non-classical nuclei was investigated by the phase field approach. The simulations of critical nucleus evolution showed a number of interesting phenomena: 1) a critical classical nucleus first shrinks toward its non-classical nucleus and then grows; 2) a non-classical nucleus has much slower growth kinetics at its earlier growth stage compared to the diffusion-controlled growth kinetics. 3) a critical classical nucleus grows faster at the earlier growth stage than the non-classical nucleus. All of these results demonstrate that it is critical to introduce the correct critical nuclei in order to correctly capture the kinetics of precipitation.

Li, Yulan; Hu, Shenyang Y.; Zhang, Lei; Sun, Xin

2014-01-10T23:59:59.000Z

77

Oxygen Plasma Activation of Cr(CO)(6) on ?-Fe2O3(0001)...  

NLE Websites -- All DOE Office Websites (Extended Search)

Oxygen Plasma Activation of Cr(CO)(6) on ?-Fe2O3(0001). Oxygen Plasma Activation of Cr(CO)(6) on ?-Fe2O3(0001). Abstract: The chemistry of Cr(CO)6 on the Fe3O4(111)...

78

Electronic and optical properties of Cr and CrN doped anatase TiO2 from screened Coulomb hybrid calculations  

Science Journals Connector (OSTI)

We studied the electronic and atomic structures of anatase TiO2 codoped with Cr and N using hybrid density functional theory calculations. The nonlocal screened HartreeFock exchange energy is partially mixed with the traditional semilocal exchange energy. This not only patches the bandgap underestimation but also improves the description of the anion/cation-driven impurity states and the magnetization of the dopants. Cr and/or N doping modifies the valence and conduction band edges of TiO2, leading to significant bandgap reduction. Hence, Cr, N and CrN doped TiO2 are promising for enhanced visible light absorbance.

Veysel elik; Ersen Mete

2013-01-01T23:59:59.000Z

79

Partially filled intermediate band of Cr-doped GaN films  

SciTech Connect

We investigated the band structure of sputtered Cr-doped GaN (GaCrN) films using optical absorption, photoelectron yield spectroscopy, and charge transport measurements. It was found that an additional energy band is formed in the intrinsic band gap of GaN upon Cr doping, and that charge carriers in the material move in the inserted band. Prototype solar cells showed enhanced short circuit current and open circuit voltage in the n-GaN/GaCrN/p-GaN structure compared to the GaCrN/p-GaN structure, which validates the proposed concept of an intermediate-band solar cell.

Sonoda, S. [Department of Electronics, Kyoto Institute of Technology, Kyoto 606-8585 (Japan)

2012-05-14T23:59:59.000Z

80

Watermelon-like iron nanoparticles: Cr doping effect on magnetism and magnetization interaction reversal  

SciTech Connect

Chromium (Cr) forms a solid solution with iron (Fe) lattice when doped in core-shell iron -iron oxide nanocluster (NC) and shows a mixed phase of sigma (?) FeCr and bcc Fe. The Cr dopant affects heavily the magnetization and magnetic reversal process, and causes the hysteresis loop to shrink near the zero field axis. Dramatic transformation happens from dipolar interaction (0 at. % Cr) to strong exchange interaction (8 at. % of Cr) is confirmed from the Henkel plot and delta M plot, and is explained by a water-melon model of core-shell NC system.

Kaur, Maninder; Dai, Qilin; Bowden, Mark E.; Engelhard, Mark H.; Wu, Yaqiao; Tang, Jinke; Qiang, You

2013-06-26T23:59:59.000Z

Note: This page contains sample records for the topic "ire cr eek" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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to obtain the most current and comprehensive results.


81

Room Temperature, Intrinsic Vacancy Mediated Ferromagnetism in Cr:Ga2Se3/Si E. N. Yitamben,1,  

E-Print Network (OSTI)

Room Temperature, Intrinsic Vacancy Mediated Ferromagnetism in Cr:Ga2Se3/Si E. N. Yitamben,1, T. C of 4 µB/Cr. The intrinsic- vacancy structure of defected-zinc-blende -Ga2Se3 enables Cr incorporation, as well as strong overlap between Cr 3d states and the Se 4p states lining the intrinsic vacancy rows, ob

Olmstead, Marjorie

82

MgO seed layers for CoCrPt/Cr longitudinal magnetic recording media Li-Lien Lee, B. K. Cheong,a)  

E-Print Network (OSTI)

MgO seed layers for CoCrPt/Cr longitudinal magnetic recording media Li-Lien Lee, B. K. Cheong,a) D, the industry is still in the process of search- ing for a better seed layer. MgO is an ionic crystal that has

Laughlin, David E.

83

Kohlenstoffhaltige ternre Verbindungen (V-Ge-C, Nb-Ga-C, Ta-Ga-C, Ta-Ge-C, Cr-Ga-C und Cr-Ge-C)  

Science Journals Connector (OSTI)

Die ternren Phasen V2GeC, Cr2GaC und Cr2GeC werden aus den Komponenten hergestellt und als H-Phasen identifiziert. Ferner drften auch die H-Phasen Ti2GaC, und Ti2GeC existieren. In gleicher Weise hergestellte L...

W. Jeitschko; H. Nowotny; F. Benesovsky

1963-01-01T23:59:59.000Z

84

Vibronic spectroscopy of unsaturated transition metal complexes: CrC2H, CrCH3 , and NiCH3  

E-Print Network (OSTI)

to characterize diatomic transition metal oxides, nitrides, and carbides.8­22 In addition to these pure metallicVibronic spectroscopy of unsaturated transition metal complexes: CrC2H, CrCH3 , and NiCH3 Dale J investigation of small transition metal clusters and organo- metallic radicals is that these species serve

Morse, Michael D.

85

Soft zone formation in dissimilar welds between two Cr-Mo steels  

SciTech Connect

Two dissimilar weldments between 9Cr-1Mo and 2.25Cr-1Mo ferritic steels have been characterized for their microstructural stability during various postweld heat treatments (PWHTs). The samples for the investigation were extracted from bead-on-plate weldments made by depositing 2.25Cr-1Mo weld metal on 9Cr-1Mo base plate and vice versa. Subsequent application of PWHT resulted in the formation of a soft zone in the low Cr ferritic steel weld or base plate. A carbide-rich hard zone, adjoining the soft zone, was also detected in the high Cr side of the weldment. Unmixed zones in the weld metal provided additional soft and hard zones in the weld metals. The migration of carbon from low-Cr steel to high-Cr steel, driven by the carbon activity gradient, has been shown to be responsible for the formation of soft and hard zones. A carbon activity diagram for 2.25Cr-1Mo/9Cr-1Mo weldments has been proposed to aid in the selection of welding consumables for reducing or preventing the soft zone formation.

Albert, S.K.; Gill, T.P.S.; Tyagi, A.K.; Mannan, S.L.; Rodriguez, P. [Indira Gandhi Centre for Atomic Research, Kalpakkam (India); Kulkarni, S.D. [Indian Inst. of Tech., Bombay (India)

1997-03-01T23:59:59.000Z

86

Improved oxidation sulfidation resistance of Fe-Cr-Ni alloys  

DOE Patents (OSTI)

High temperature resistance of Fe-Cr-Ni alloy compositions to oxidative and/or sulfidative conditions is provided by the incorporation of about 1 to 8 wt % of Zr or Nb and results in a two-phase composition having an alloy matrix as the first phase and a fine grained intermetallic composition as the second phase. The presence and location of the intermetallic composition between grains of the matrix provides mechanical strength, enhanced surface scale adhesion, and resistance to corrosive attack between grains of the alloy matrix at temperatures of 500 to 1000/sup 0/C.

Natesan, K.; Baxter, D.J.

1983-07-26T23:59:59.000Z

87

Bulk and track etch properties of CR-39 SSNTD etched in NaOH/ethanol  

E-Print Network (OSTI)

Bulk and track etch properties of CR-39 SSNTD etched in NaOH/ethanol K.F. Chan, F.M.F. Ng, D. described the use of NaOH/ethanol as an etchant for the CR-39 detector, and have determined the corre and track etch properties of CR- 39 in NaOH/ethanol were derived from direct measurements. The bulk etch

Yu, K.N.

88

Three dimensional magnetism and coupling to conduction electrons in PdCrO2  

SciTech Connect

We report density functional calculations addressing the electronic structure and magnetic properties of delafossite PdCrO{sub 2}. We find substantial magnetic interactions in the c-axis direction as well as beyond first nearest neighbors in-plane, so that PdCrO{sub 2} is a three-dimensional (3D) frustrated antiferromagnet. We also find substantial coupling between the Cr moments and the Pd derived conduction electrons.

Ong, Khuong P [IHPC, Singapore; Singh, David J [ORNL

2012-01-01T23:59:59.000Z

89

A novel low Cr-containing FeCrCo alloy for metallic interconnects in planar intermediate temperature solid oxide fuel cells  

Science Journals Connector (OSTI)

Abstract A newly developed low-Cr containing FeCrCo alloy, named as FeCro, is evaluated as a candidate material of metallic interconnects for intermediate temperature solid oxide fuel cells (IT-SOFCs). This alloy possesses excellent oxidation resistance and adequate electrical conductivity at 750C in air, and shows slight Cr deposition in/around La0.72Sr0.18MnO3(LSM) electrode under a harsh accelerating condition of 400mAcm?2 and 850C. The thickness of the oxide scale thermally grown at 750C in air for 1000 his less than 1?m, presenting a double-layered structure with dense (Mn, Cr)3O4 on the top of Cr2O3. The oxidation kinetics at 750C obeys the parabolic law with a low rate constant of1.42נ10?15g2cm?4s?1. The Cr deposition in/around the LSM electrode in the presence of the FeCro alloy is remarkably reduced, compared to the commercial Crofer 22H alloy. The measured area specific resistance (ASR) at 750C in air after 1000h isothermal oxidation is 14m?cm2. It is the unique microstructure of the formed oxide scale that significantly enhances the resistances of the FeCro alloy to oxidation and Cr volatilization.

Wenying Zhang; Dong Yan; Jie Yang; Jing Chen; Bo Chi; Jian Pu; Jian Li

2014-01-01T23:59:59.000Z

90

Optimisation of deep cryogenic treatment for 100cr6 bearing steel using the grey taguchi technique; -.  

E-Print Network (OSTI)

??Deep Cryogenic treatment is a supplementary process to the conventional heat treatment for enhancing the mechanical properties of steels 100Cr6 bearing steel is widely used (more)

Sri Siva, R

2014-01-01T23:59:59.000Z

91

CORROSION OF Fe-10Al-Cr ALLOYS BY COAL CHAR  

E-Print Network (OSTI)

off-gas from a typical gasifier contains large percentagesIOAl-Cr alloys at coal-gasifier This FeS and CaS0 operating

Gordon, B.A.

2011-01-01T23:59:59.000Z

92

Structure, Magnetism, and Transport of CuCr2Se4 Thin Films  

E-Print Network (OSTI)

to the surface. Electronic structure calculations indicatealso present electronic structure calculations for CuCr 2 Sewith the electronic structure calculations. 1. Introduction

2008-01-01T23:59:59.000Z

93

Precipitation in 9Ni-12Cr-2Cu maraging steels  

SciTech Connect

Two maraging steels with the compositions 9Ni-12Cr-2Cu-4Mo (wt%) and 9Ni-12Cr-2Cu and with small additions of Al and Ti were investigated using atom probe field ion microscopy. Tomographic atom probe investigations were performed to clarify the spatial distribution of elements in and close to the precipitates. Materials heat treated at 475 C for 5, 25 min, 1, 2, 4 and 400 h were analyzed. Precipitates in the Mo-rich material were observed already after 5 min of aging, while in the material without MO, precipitation started later. In both materials precipitation begins with the formation of Cu-rich particles which work as nucleation sites for a Ni-rich phase of type Ni{sub 3}(Ti,Al). A Mo-rich phase was detected in the Mo-rich steel after 2 h of aging. The distribution of alloying elements in the precipitates, their role in the precipitation process, and the mechanism of hardening in the two materials are discussed.

Stiller, K.; Haettestrand, M. [Chalmers Univ. of Technology, Goeteborg (Sweden). Dept. of Physics] [Chalmers Univ. of Technology, Goeteborg (Sweden). Dept. of Physics; Danoix, F. [Univ. de Rouen, Mont Saint Aignan (France). Lab. de Microscopie Ionique] [Univ. de Rouen, Mont Saint Aignan (France). Lab. de Microscopie Ionique

1998-11-02T23:59:59.000Z

94

Proton spectroscopy of 48Ni, 46Fe, and 44Cr  

E-Print Network (OSTI)

Results of decay spectroscopy on nuclei in vicinity of the doubly magic 48Ni are presented. The measurements were performed with a Time Projection Chamber with optical readout which records tracks of ions and protons in the gaseous volume. Six decays of 48Ni including four events of two-proton ground-state radioactivity were recorded. An advanced reconstruction procedure yielded the 2p decay energy for 48Ni of Q2p = 1.29(4) MeV. In addition, the energy spectra of \\b{eta}-delayed protons emitted in the decays of 44Cr and 46Fe, as well as half-lives and branching ratios were determined. The results were found to be consistent with the previous measurements made with Si detectors. A new proton line in the decay of 44Cr corresponding to the decay energy of 760 keV is reported. The first evidence for the \\b{eta}2p decay of 46 Fe, based on one clear event, is shown.

M. Pomorski; M. Pftzner; W. Dominik; R. Grzywacz; A. Stolz; T. Baumann; J. S. Berryman; H. Czyrkowski; R. D?browski; A. Fija?kowska; T. Ginter; J. Johnson; G. Kami?ski; N. Larson; S. N. Liddick; M. Madurga; C. Mazzocchi; S. Mianowski; K. Miernik; D. Miller; S. Paulauskas; J. Pereira; K. P. Rykaczewski; S. Suchyta

2014-07-06T23:59:59.000Z

95

Nanolayered CrAlTiN and multilayered CrAlTiNAlTiN coatings for solid particle erosion protection  

Science Journals Connector (OSTI)

Abstract Applying hard coatings on airfoil surfaces is proven to be an effective approach to mitigating erosion damage to engine components. Nanolayered or multilayered coatings, because of their capability of tailoring hardness and toughness through modifications in the chemistry and architecture of layer constituents, have been explored as potential candidates for this specific application. In this study, nanolayered CrAlTiN (CrN/AlTiN) coatings with different modulation periods, along with multilayered CrAlTiNAlTiN coatings having different number of layers and different thickness of individual layers, were fabricated, characterized and evaluated. All the coatings significantly outperformed the CrN baseline in erosion resistance, and their performance was strongly affected by the bilayer period of the nanolayered coatings or the layer architectural characteristics of multilayered coatings.

Q. Yang; R. McKellar

2015-01-01T23:59:59.000Z

96

Corrosion Behavior of Solution-Annealed CoCrMo Medical Implant  

E-Print Network (OSTI)

! ! ! Corrosion Behavior of Solution- Annealed CoCrMo Medical Implant Alloys Pooja Panigrahi University June 6, 2011 #12;! ! ""! Corrosion Behavior of Solution-Annealed CoCrMo Medical Implant Alloys and Applied Sciences Northwestern University June 6, 2011 Abstract Corrosion behavior of solution annealed

Shull, Kenneth R.

97

Characterization of the Ni-Cr Alloy Prepared by Laser Cladding Method  

Science Journals Connector (OSTI)

The laser cladding Ni-Cr alloy was prepared by adding nickel coated chromium composite powders on the surface of 45 steel using the laser cladding method. The component and microstructure were investigated by EDS, SEM, and HRTEM. The results show that ... Keywords: Ni-Cr alloy, laser cladding, characterization

Rui Yang; Dongjian Gao; Zhijia Qu

2012-07-01T23:59:59.000Z

98

MAGNESIUM ISOTOPIC COMPOSITION OF CAIs AND CHONDRULES FROM CR CHONDRITES. B. , M. Gounelle1  

E-Print Network (OSTI)

MAGNESIUM ISOTOPIC COMPOSITION OF CAIs AND CHONDRULES FROM CR CHONDRITES. B. Mimoun1 , M. Gounelle1. Introduction: The magnesium isotopic composi- tion of primitive extraterrestrial materials is worth measuring.g. 10]. Figure 1: The magnesium isotopic composition of CAIs in CR chondrites. Error bars are 1

Technische Universiteit Delft

99

EPR, ENDOR, and optical-absorption study of Cr3 centers substituting  

E-Print Network (OSTI)

ARTICLES EPR, ENDOR, and optical-absorption study of Cr3¿ centers substituting for niobium in Li of Sciences, Kiev, Ukraine Received 6 January 2000; revised manuscript received 3 May 2000 A triplet of EPR % of Cr. Detailed investigations of the angular dependencies of EPR and electron nuclear double

Malovichko, Galina

100

The effect of metallurgical variables on the electrocatalytic properties of PtCr alloys  

SciTech Connect

In this investigation, the effect of alloying on catalysis, especially with respect to oxygen and the ORR, was examined. A series of PtCr alloys allowed four major aspects of alloying to be investigated: (i) effect of decreasing lattice parameter with increasing Cr content in the Pt terminal solid solution, (ii) effect of an order/disorder transition, (iii) difference between intermetallic and solid solution structures, and (iv) effect of dendritic segregation. Results indicated that contrary to the findings of previous investigators, decreased lattice spacing did not correlate with an increase in ORR activity. Atomic ordering in low Cr content specimens, however, was found to generally increase catalysis. Results also indicated that disordered structures interact more strongly with impurities than the ordered structures. ORR Tafel slopes, however, were unaffected by atomic ordering although additional chromium, up to at least 35 atom percent (a/o), caused a decrease in Tafel slope apparently due to oxide reduction effects. At higher Cr concentrations, catalysis decreased due to the passive nature of chromium oxide. The change in crystal structure which occurs for the 80 a/o Cr sample and the dendritic structure, had little effect on most of the electrochemical parameters studied relative simply to the additional Cr content. The results of this work also indicated that, in general, no alloy in the PtCr system is more catalytic than pure Pt. This result is in contrast to gas diffusion cell studies which have shown significant increases in catalysis due to PtCr alloying.

Glass, J.T.; Cahen, G.L. Jr.; Stoner, G.E.; Taylor, E.J.

1987-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ire cr eek" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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101

A DFT Study of Ethanol Adsorption and Dehydrogenation on Cu/Cr2O3 Catalyst  

Science Journals Connector (OSTI)

In this work, DFT simulation method was used to study the adsorption and dehydrogenation of ethanol on Cu/Cr2O3 catalyst. Firstly, the stable configuration of Cu4 cluster adsorbed on Cr2O3...(001) surface was stu...

Minhua Zhang; Yanping Huang; Ruzhen Li; Guiming Li; Yingzhe Yu

2014-11-01T23:59:59.000Z

102

Resonant impurity scattering and electron-phonon scattering in the electrical resistivity of Cr thin films  

E-Print Network (OSTI)

Resonant impurity scattering and electron-phonon scattering in the electrical resistivity of Cr The resistivity as a function of temperature from 0.6 to 300 K for epitaxial and polycrystalline Cr thin films residual resistivity up to 400 cm and a minimum at low temperatures below 100 K . This is strong

Hellman, Frances

103

SF6432-CR (02-01-12) Cost Reimbursement  

NLE Websites -- All DOE Office Websites (Extended Search)

2/01/12 2/01/12 Page 1 of 24 Printed copies of this document are uncontrolled. Retrieve latest version electronically. SANDIA CORPORATION SF 6432-CR (02/01/12) SECTION II STANDARD TERMS AND CONDITIONS FOR COST-REIMBURSEMENT CONTRACTS THE FOLLOWING CLAUSES APPLY TO THIS CONTRACT AS INDICATED UNLESS SPECIFICALLY DELETED, OR EXCEPT TO THE EXTENT THEY ARE SPECIFICALLY IDENTIFIED AS BEING CHANGED, SUPPLEMENTED, OR AMENDED IN WRITING ISSUED BY THE SANDIA CONTRACTING REPRESENTATIVE. (CTRL+CLICK ON A LINK BELOW TO ADVANCE DIRECTLY TO THAT SECTION) ACCEPTANCE OF TERMS AND CONDITIONS (Ts&Cs) ALLOWABLE COSTS AND FEE APPLICABLE LAW ASSIGNMENT AUTHORIZED DISTRIBUTORS BANKRUPTCY CLAIM OF COSTS INCURRED DEFINITIONS DISPUTES EXCESS FREIGHT CHARGES

104

Mn-doping-induced itinerant-electron ferromagnetism in Cr2GeC  

Science Journals Connector (OSTI)

The magnetism of the Mn+1AXn phase, Cr2GeC, and its Mn-doped system, (Cr1?xMnx)2GeC (x?0.25), synthesized via a solid state reaction, was investigated systematically. Cr2GeC is in a spin-unpolarized state, but the ferromagnetic band polarization is induced immediately by the Mn doping. The Curie temperature, TC, and the spontaneous moment, ps, increase almost proportionally to the Mn concentration, strongly suggesting that Cr2GeC is located in the vicinity of a ferromagnetic quantum critical point. The strong concentration dependence of peff/ps, where peff is the effective moment in the paramagnetic state, indicates that the ferromagnetism appearing in the Mn-doped Cr2GeC can be classified as a typical itinerant-electron ferromagnetism in a wide range of the degree of electron localization.

Z. Liu; T. Waki; Y. Tabata; H. Nakamura

2014-02-28T23:59:59.000Z

105

Photocatalysts of Cr Doped TiO2 Film Prepared by Micro Arc Oxidation  

Science Journals Connector (OSTI)

A series of Cr doped TiO2 films were prepared by micro arc oxidation (MAO) using an electrolyte of Na 3PO4+K2Cr2O7. X-ray diffraction and scanning electron microscopy revealed that the films mainly consisted of anatase phase with a porous surface morphology. The films have an excellent photocatalytic effect for degradation of methylene blue and decomposition of water under visible light illumination. This arises from the formation of Cr3+/Cr4+ and oxygen vacancy energy levels owing to Cr doping. The former reduces the electron-hole recombination chance while the latter generates a new gap between the conduction band (CB) and valence band (VB) of TiO2 which lowers the photo energy of the excited electron in the VB to the oxygen vacancy states. The mechanisms for film synthesis during the MAO process are also presented.

Li Wan; Jian-feng Li; Jia-you Feng; Wei Sun; Zong-qiang Mao

2008-01-01T23:59:59.000Z

106

Solid Solutions between CrO4- and SO4-Ettringite Ca6(Al(OH)6)2[(CrO4)x(SO4)1-x]3*26 H2O  

Science Journals Connector (OSTI)

Solid Solutions between CrO4- and SO4-Ettringite Ca6(Al(OH)6)2[(CrO4)x(SO4)1-x]3*26 H2O ... Solid solutions between SO4- and CrO4-ettringite are synthesized, characterized and solubility products are determined and illustrated in a Lippmann diagram. ... In cementitous systems, CrO42? is thought to be incorporated as a solid solution with SO42? in ettringite. ...

Sabine M. Leisinger; Barbara Lothenbach; Gwenn Le Saout; Ralf Kgi; Bernhard Wehrli; C. Annette Johnson

2010-11-05T23:59:59.000Z

107

Integrated Ecogenomics Study for Bioremediation of Cr(VI) at Hanford 100H Area  

SciTech Connect

Hexavalent chromium is a widespread contaminant found in groundwater. In order to stimulate microbially mediated Cr(VI)-reduction, a poly-lactate compound was injected into Cr(VI)-contaminated aquifers at site 100H at Hanford. Investigation of bacterial community composition using high-density DNA microarray analysis of 16S rRNA gene products revealed a stimulation of Pseudomonas, Desulfovibrio and Geobacter species amongst others. Enrichment of these organisms coincided with continued Cr(VI) depletion. Functional gene-array analysis of DNA from monitoring well indicated high abundance of genes involved in nitrate-reduction, sulfate-reduction, iron-reduction, methanogenesis, chromium tolerance/reduction. Clone-library data revealed Psedomonas was the dominant genus in these samples. Based on above results, we conducted lab investigations to study the dominant anaerobic culturable microbial populations present at this site and their role in Cr(VI)-reduction. Enrichments using defined anaerobic media resulted in isolation of an iron-reducing, a sulfate-reducing and a nitrate-reducing isolate among several others. Preliminary 16S rDNA sequence analysis identified the isolates as Geobacter metallireducens, Pseudomonas stutzeri and Desulfovibrio vulgaris species respectively. The Pseudomonas isolate utilized acetate, lactate, glycerol and pyruvate as alternative carbon sources, and reduced Cr(VI). Anaerobic washed cell suspension of strain HLN reduced almost 95?M Cr(VI) within 4 hr. Further, with 100?M Cr(VI) as sole electron-acceptor, cells grew to 4.05 x 107 /ml over 24 h after an initial lag, demonstrating direct enzymatic Cr(VI) reduction coupled to growth. These results demonstrate that Cr(VI)-immobilization at Hanford 100H site could be mediated by direct microbial metabolism in addition to indirect chemical reduction of Cr(VI) by end-products of microbial activity.

Chakraborty, Romy; Chakraborty, Romy

2008-08-12T23:59:59.000Z

108

Investigation of the {gamma}-Ti(Cr,Al)2 phase at 800 C and 1000 C  

SciTech Connect

A section of the Ti-Al-Cr ternary system, centered around the {gamma}-TiCr{sub 2} phase was examined using five quenched bulk alloy samples and three diffusion couples. Due to the sluggishness of diffusion both at 800 and 1,000 C in the TiCr{sub 2} phase fields, the heat treatment produced a state of near-equilibrium in the samples rather than complete equilibrium, as desired. However, as previous studies have made use of similar, or shorter, processing schedules, the results of the present study should be considered as valid as the earlier works. As a confirmation of the phase composition obtained from the near-equilibrium bulk alloys, the results of a diffusion couple analysis, yielded similar compositions. It is clear, based on the above results that the {gamma}-TiCr{sub 2}, with a C14 crystal structure, does indeed extend into the Ti-Al-Cr ternary system as indicated by Suprunenko et al. The {gamma}-TiCr{sub 2} phase advances into the ternary as the b solid solution pulls away from the Ti-Cr binary system with decreasing temperature. Solubility into the ternary system is made possible by Al atoms substituting onto Cr sites, as is observed for the Al-Cr-Nb ternary system. Although the solubility of the {gamma}-TiCr{sub 2} phase extends from about 3--19at% Al at 1,000 C and from 6--24at% Al at 800 C, the exact limits of solubility are yet to be determined.

Jewett, T.J.; Dahms, M. [GKSS Research Centre, Geesthacht (Germany)] [GKSS Research Centre, Geesthacht (Germany)

1995-05-15T23:59:59.000Z

109

Usnesen ze 4. zasedn Vdeck rady AV CR konanho dne 10. z 1. Oven a kontrola zpisu z 3. zasedn  

E-Print Network (OSTI)

reform terciárního vzdlávání. Vdecká rada AV CR bere se souhlasem na vdomí stanovisko AR AV CR k reform

Tebbens, Jurjen Duintjer

110

Role of Embedded Clustering in Dilute Magnetic Semiconductors: Cr Doped GaN X. Y. Cui,1  

E-Print Network (OSTI)

, typically 5 (20­30) times smaller for Cr-based (Mn-based) III-V DMS than the value expected, 3 B= Cr4 BRole of Embedded Clustering in Dilute Magnetic Semiconductors: Cr Doped GaN X. Y. Cui,1 J. E configurations coexist and the statistical distribution and associated magnetism will depend sensitively

Medvedeva, Julia E.

111

Using direct hot-rolling approach to obtain dual-phase weathering steel CuPCrNiMo  

Science Journals Connector (OSTI)

A weathering steel CuPCrNiMo has been ... based on the continuous cooling transformation diagram of weathering steel CuPCrNiMo. The results show that the microstructures of DP weathering steels CuPCrNi...

Chunling Zhang; Dayong Cai; Bo Liao; Yunchang Fan

2010-01-01T23:59:59.000Z

112

Itinerant and local-moment magnetism in EuCr2As2 single crystals  

Science Journals Connector (OSTI)

We report on the crystal structure, physical properties, and electronic structure calculations for the ternary pnictide compound EuCr2As2. X-ray diffraction studies confirmed that EuCr2As2 crystalizes in the ThCr2Si2-type tetragonal structure (space group I4/mmm). The Eu ions are in a stable divalent state in this compound. Eu moments in EuCr2As2 order magnetically below Tm=21 K. A sharp increase in the magnetic susceptibility below Tm and the positive value of the paramagnetic Curie temperature obtained from the Curie-Weiss fit suggest dominant ferromagnetic interactions. The heat capacity exhibits a sharp ?-shape anomaly at Tm, confirming the bulk nature of the magnetic transition. The extracted magnetic entropy at the magnetic transition temperature is consistent with the theoretical value Rln(2S+1) for S=7/2 of the Eu2+ ion. The temperature dependence of the electrical resistivity ?(T) shows metallic behavior along with an anomaly at 21 K. In addition, we observe a reasonably large negative magnetoresistance (??24%) at lower temperature. Electronic structure calculations for EuCr2As2 reveal a moderately high density of states of Cr-3d orbitals at the Fermi energy, indicating that the nonmagnetic state of Cr is unstable against magnetic order. Our density functional calculations for EuCr2As2 predict a G-type AFM order in the Cr sublattice. The electronic structure calculations suggest a weak interlayer coupling of the Eu moments.

U. B. Paramanik; R. Prasad; C. Geibel; Z. Hossain

2014-04-25T23:59:59.000Z

113

Electrochemical Testing of Ni-Cr-Mo-Gd Alloys  

SciTech Connect

The waste package site recommendation design specified a boron-containing stainless steel, Neutronit 976/978, for fabrication of the internal baskets that will be used as a corrosion-resistant neutron-absorbing material. Recent corrosion test results gave higher-than-expected corrosion rates for this material. The material callout for these components has been changed to a Ni-Cr-Mo-Gd alloy (ASTM-B 932-04, UNS N06464) that is being developed at the Idaho National Laboratory. This report discusses the results of initial corrosion testing of this material in simulated in-package environments that could contact the fuel baskets after breach of the waste package outer barrier. The corrosion test matrix was executed using the potentiodynamic and potentiostatic electrochemical test techniques. The alloy performance shows low rates of general corrosion after initial removal of a gadolinium-rich second phase that intersects the surface. The high halide-containing test solutions exhibited greater tendencies toward initiation of crevice corrosion.

T. E. Lister; R. E. Mizia; H. Tian

2005-10-01T23:59:59.000Z

114

Steamside Oxidation Behavior of Experimental 9%Cr Steels  

SciTech Connect

Reducing emissions and increasing economic competitiveness require more efficient steam power plants that utilize fossil fuels. One of the major challenges in designing these plants is the availability of materials that can stand the supercritical and ultra-supercritical steam conditions at a competitive cost. There are several programs around the world developing new ferritic and austenitic steels for superheater and reheater tubes exposed to the advanced steam conditions. The new steels must possess properties better than current steels in terms of creep strength, steamside oxidation resistance, fireside corrosion resistance, and thermal fatigue resistance. This paper introduces a series of experimental 9%Cr steels containing Cu, Co, and Ti. Stability of the phases in the new steels is discussed and compared to the phases in the commercially available materials. The steels were tested under both the dry and moist conditions at 650C for their cyclical oxidation resistance. Results of oxidation tests are presented. Under the moist conditions, the experimental steels exhibited significantly less mass gain compared to the commercial P91 steel. Microstructural characterization of the scale revealed different oxide compositions.

Dogan, O.N.; Holcomb, G.R.; Alman, D.E.; Jablonski, P.D.

2007-10-01T23:59:59.000Z

115

Argonne TTRDC - D3 (Downloadable Dynamometer Database) - 2010 Honda CR-Z  

NLE Websites -- All DOE Office Websites (Extended Search)

CR-Z Hybrid CR-Z Hybrid honda crz Front View - 2010 Honda CR-Z Hybrid The Honda CR-Z hybrid builds upon the Insight/Civic Honda hybrid systems with a sporty angle. The vehicle is marketed as a successor to the CRX 2-seat sport compact. It features a 1.5 L (83 kW) engine (larger than the 1.3 L used in the Insight and Civic HEVs) and is offered with both an automatic (push-belt CVT) and a manual transmission. The battery is similar to the Insight pack at 100.8 nominal voltage. The IMA motor is specified at 13 hp. Key Technology Mild hybrid "Honda IMA" hybrid system 1.5 L (83 kW) engine 100.8-Volt Nickel-Metal-Hydride (NiMH) Features 3 operational modes: "Econ," "Normal," and "Sport" Report Testing Summary (pdf) Data Download all data (zip)

116

Microsoft Word - CR-091 Primary Basis of Cost Savings and Cost...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

CR-091 Primary Basis of Cost Savings and Cost Savings Amount Custom Fields Primary Basis of Cost Savings and Cost Savings Amount Custom Fields Background On August 29 th , 2013 the...

117

Luminescence and other spectroscopic properties of purple and green Cr-clinochlore  

Science Journals Connector (OSTI)

The luminescence of purple chlorite is rather unusual because of a quite high amount of Cr2O3 in this crystal. Accordingly, effective concentration quenching of luminescence might be expected. Indeed, the emissio...

Maria Czaja; Mariola K?dzio?ka-Gawe?

2014-02-01T23:59:59.000Z

118

C/CrC nanocomposite coating deposited by magnetron sputtering at high ion irradiation conditions  

SciTech Connect

CrC with the fcc NaCl (B1) structure is a metastable phase that can be obtained under the non-equilibrium conditions of high ion irradiation. A nano-composite coating consisting of amorphous carbon embedded in a CrC matrix was prepared via the unbalanced magnetron sputtering of graphite and Cr metal targets in Ar gas with a high ionized flux (ion-to-neutral ratio Ji/Jn = 6). The nanoscale amorphous carbon clusters self-assembled into layers alternated by CrC, giving the composite a multilayer structure. The phase, microstructure, and composition of the coating were characterized using x-ray diffraction, transmission electron microscopy, and aberration corrected scanning transmission electron microscopy coupled with electron energy loss spectroscopy. The interpretation of the true coating structure, in particular the carbide type, is discussed.

Zhou, Z.; Rainforth, W. M. [Department of Materials Science and Engineering, University of Sheffield, Sheffield, S1 3JD (United Kingdom); Gass, M. H.; Bleloch, A. [SuperSTEM at Daresbury Laboratory, Daresbury, Cheshire, WA4 4AD (United Kingdom); Ehiassarian, A. P.; Hovsepian, P. Eh. [Materials Engineering Research Institute, Sheffield Hallam University, Sheffield, S1 1WB (United Kingdom)

2011-10-01T23:59:59.000Z

119

Graphene mode-locked Cr:ZnS laser with 41 fs pulse duration  

Science Journals Connector (OSTI)

We report the ultrashort-pulse Cr:ZnS laser mode-locked by graphene-based saturable absorber mirror. Using the combination of bulk material and a chirped mirror, we demonstrate the...

Tolstik, Nikolai; Sorokin, Evgeni; Sorokina, Irina T

2014-01-01T23:59:59.000Z

120

Optimizing Cr(VI) adsorption on activated carbon produced from heavy oil fly ash  

Science Journals Connector (OSTI)

In order to explore the beneficial utilization of heavy oil fly ash (HOFA) generated in the power plants, the present study is intended to optimize the chromium(VI) [Cr(VI)] adsorption on activated carbon prod...

Abdullah Mofarrah; Tahir Husain; Bing Chen

2014-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "ire cr eek" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Observations of Unresolved Photospheric Magnetic Fields in Solar Flares Using Fe i and Cr i Lines  

Science Journals Connector (OSTI)

The structure of the photospheric magnetic field during solar flares is examined using echelle spectropolarimetric observations. The study is based on several Fei and Cri lines observed at locations correspondi...

M. Gordovskyy; V. G. Lozitsky

2014-10-01T23:59:59.000Z

122

Widely-tunable femtosecond operation of Cr:LiSAF lasers using broadband saturable bragg reflectors  

E-Print Network (OSTI)

We describe a low-cost diode-pumped Cr:LiSAF laser, mode-locked using a broadband saturable Bragg reflector. The laser produces continuously tunable sub-200-fs pulses from 800 nm to 905 nm.

Demirbas, Umit

123

Audit Report: CR-B-02-01 | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

2-01 Audit Report: CR-B-02-01 October 15, 2001 Fixed-Price Contracting for Department of Energy Cleanup Activities As part of its Contract Reform effort, the Department of Energy...

124

Properties of spark-deposited NiCrNiAl coatings  

Science Journals Connector (OSTI)

The structure and phase composition of sintered NiCrNiAl alloys and the kinetics of their electrospark deposition onto 45 steel are examined. It is ... shown that the mass transfer coefficient for the deposition

A. V. Paustovskii; R. A. Alfintseva

2009-07-01T23:59:59.000Z

125

Preliminary observations of the thermodynamic predictions of Fe-Cr-Ni alloys in coal gasifier environments  

Science Journals Connector (OSTI)

The construction of thermodynamic stability diagrams for the Fe-Cr-Ni systems is discussed. The constructed diagrams are used to predict materials behavior at coal gasifier oxygen and sulfur pote...

B. A. Gordon; V. Nagarajan

1979-04-01T23:59:59.000Z

126

Thermodynamic predictions of the behavior of Fe-Cr-Al alloys in coal gasifier environments  

Science Journals Connector (OSTI)

The construction of thermodynamic stability diagrams for the Fe-Cr-Al system is discussed. The constructed diagrams are used to predict materials behavior at coal gasifier oxygen and sulfur potentials. Experiment...

B. A. Gordon; W. Worrell; V. Nagarajan

1979-02-01T23:59:59.000Z

127

Cr17Ni14Mo3 Powder Laser Cladding on 45Steel Substrate  

Science Journals Connector (OSTI)

The relationship between laser power, scan-rate, thickness of pre-placed powder particles, overlap, preheating and laser cladding coating quality was analyzed. Laser cladding of Cr17Ni14Mo3 stainless steel powder...

Sun Huilai; Lin Shuzhong; Zhao Fangfang; Qi Xiangyang

2010-01-01T23:59:59.000Z

128

Flat panel display using Ti-Cr-Al-O thin film  

DOE Patents (OSTI)

Thin films of Ti--Cr--Al--O are used as a resistor material. The films are rf sputter deposited from ceramic targets using a reactive working gas mixture of Ar and O.sub.2. Resistivity values from 10.sup.4 to 10.sup.10 Ohm-cm have been measured for Ti--Cr--Al--O film <1 .mu.m thick. The film resistivity can be discretely selected through control of the target composition and the deposition parameters. The application of Ti--Cr--Al--O as a thin film resistor has been found to be thermodynamically stable, unlike other metal-oxide films. The Ti--Cr--Al--O film can be used as a vertical or lateral resistor, for example, as a layer beneath a field emission cathode in a flat panel display; or used to control surface emissivity, for example, as a coating on an insulating material such as vertical wall supports in flat panel displays.

Jankowski, Alan F. (Livermore, CA); Schmid, Anthony P. (Solan Beach, CA)

2002-01-01T23:59:59.000Z

129

Structure, Magnetism, and Transport of CuCr2Se4 Thin Films  

E-Print Network (OSTI)

Structure, Magnetism, and Transport of CuCr 2 Se 4 Thindichroism shows that the magnetism persists to the surfacesuch as the nature of magnetism at surfaces and interfaces.

2008-01-01T23:59:59.000Z

130

Low-cost, single-mode diode-pumped Cr:Colquiriite lasers  

E-Print Network (OSTI)

We present three Cr[superscript 3+]:Colquiriite lasers as low-cost alternatives to Ti:Sapphire laser technology. Single-mode laser diodes, which cost only $150 each, were used as pump sources. In cw operation, with ~520 ...

Demirbas, Umit

131

Microstructural analyses of Cr(VI) speciation in chromite ore processing Residue (COPR)  

E-Print Network (OSTI)

Christodoulatos, C. Ettringite-Induced Heave in Chromite Orehydrotalcite calcite quartz ettringite amorphous HB n.d.of the total Cr(VI). Ettringite (Ca 6 Al 2 (SO 4 ) 3 (OH) 12

CHRYSOCHOOU, MARIA

2010-01-01T23:59:59.000Z

132

Audit Report: CR-FS-96-03 | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

FS-96-03 Audit Report: CR-FS-96-03 April 15, 1996 Report on Matters Identified at Strategic Petroleum Reserve During Audit of Statement of Financial Position Audit Report:...

133

Heat treatment, aging effects, and microstructure of 12 Pct Cr steels  

Science Journals Connector (OSTI)

The 12 pct Cr steels are attractive materials for advanted steam generators. In support of the DEBENE project for the development of a sodiumcooled fast reactor, a materials program is in progress to show the ...

J. W. Schinkel; P. L. F. Rademakers; B. R. Drenth

1984-06-01T23:59:59.000Z

134

Laser Performance of Composite Nd:YAG/Cr:YAG Ceramics for Laser Ignition  

Science Journals Connector (OSTI)

Monolithic lasers of composite Nd:YAG/Cr:YAG ceramics with different Nd concentrations and cavity lengths were tested. A passively Q-switched pulse energy of 1.7mJ with a duration of...

Tsunekane, Masaki; Taira, Takunori

135

CORROSION OF Fe-10Al-Cr ALLOYS BY COAL CHAR  

E-Print Network (OSTI)

Potent.ials Encountered in Coal Conversion Systems", NASA TNof Illinois #6 ash and coal char. Figure 1. Cross sectionsof Fe-lOAl-Cr Alloys by Coal Char B. A. Gordon and V.

Gordon, B.A.

2011-01-01T23:59:59.000Z

136

Electronic Structure of CrN: from Macro to Nano | Argonne National...  

NLE Websites -- All DOE Office Websites (Extended Search)

Electronic Structure of CrN: from Macro to Nano January 28, 2015 11:00AM to 12:00PM Presenter Antia Sanchez Botana, University of California, Davis Location Building 223, Room S105...

137

Heat Resistance of Electric Arc Coatings Made of FeCrBAl Powder Wire  

Science Journals Connector (OSTI)

Electric metallized coatings made of FeCrBAl powder wire possess a high heat resistance at 700800C at the level ... the base material. To obtain heat-resistant electric metallized coatings of powder wire, it...

V. Pokhmurs'kyi; M. Student; B. Formanek; V. Serivka; Yu. Dz'oba

2003-11-01T23:59:59.000Z

138

ISSUES REGARDING FEE STRUCTURE FOR THREE ENVIRONMENTAL MANAGEMENT CONTRACTS, CR-B-01-01  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

CR-B-01-01 CR-B-01-01 AUDIT REPORT ISSUES REGARDING FEE STRUCTURE FOR THREE ENVIRONMENTAL MANAGEMENT CONTRACTS MAY 2001 U.S. DEPARTMENT OF ENERGY OFFICE OF INSPECTOR GENERAL OFFICE OF AUDIT SERVICES DEPARTMENT OF ENERGY Washington, DC 20585 May 9, 2001 MEMORANDUM FOR THE DIRECTOR, OFFICE OF MANAGEMENT AND ADMINISTRATION FROM: Phillip L. Holbrook (Signed) Deputy Inspector General for Audit Services Office of Inspector General SUBJECT: INFORMATION: Audit Report on "Issues Regarding Fee Structure for

139

PVD synthesis and high-throughput property characterization of Ni?Fe?Cr alloy libraries  

SciTech Connect

Three methods of alloy library synthesis, thick-layer deposition followed by interdiffusion, composition-spread codeposition and electron-beam melting of thick deposited layers, have been applied to Ni-Fe-Cr ternary and Ni-Cr binary alloys. Structural XRD mapping and mechanical characterization by means of nanoindentation have been used to characterize the properties of the libraries. The library synthesis methods are compared from the point of view of the structural and mechanical information they can provide.

Rar, A.; Frafjord, J.J.; Fowlkes, Jason D.; Specht, E.D.; Rack, P.D.; Santella, M.L.; Bei, H.; George, E.P.; Pharr, G.M. (Tennessee-K); (Tennessee-K); (ORNL)

2010-11-10T23:59:59.000Z

140

Heat treatment of NiCrFe alloy to optimize resistance to intergrannular stress corrosion  

DOE Patents (OSTI)

A process of producing a NiCrFe alloy having a high resistance to stress corrosion cracking comprising heating a NiCrFe alloy to a temperature sufficient to enable the carbon present in the alloy body in the form of carbide deposits to enter into solution, rapidly cool the alloy body, and heat the cooled body to a temperature between 1100.degree. to 1500.degree. F. for about 1 to 30 hours.

Steeves, Arthur F. (Schenectady, NY); Bibb, Albert E. (Clifton Park, NY)

1984-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ire cr eek" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

High-pressure structure of half-metallic CrO2 B. R. Maddox  

E-Print Network (OSTI)

transition from rutile -CrO2 phase I P42/mnm to orthorhombic -CrO2 phase II CaCl2-like, Pnnm is presented. The transition to the CaCl2 structure, which appears to be second order, occurs at 12±3 GPa without any typically transforms to another sixfold-coordinated structure, CaCl2, or the -PbO2 structure found in shock

Pickett, Warren

142

while ll 6= ERROR do tcl tuple of ctcl corresponding to ll.tid cr  

E-Print Network (OSTI)

corresponding to cdb.tid cr lca #12;rst tuple t of li cl such that t.class >= ca.name caf while lca 6= ERROR and lca.class = ca.name do lia tuple of logical images corresponding to lca.tid cr lcb #12;rst tuple next tuple of li cl in alphabetic order can lca next tuple of li cl in alphabetic order can Plan P4P

Samet, Hanan

143

Surface modification to improve fireside corrosion resistance of Fe-Cr ferritic steels  

DOE Patents (OSTI)

An article of manufacture and a method for providing an Fe--Cr ferritic steel article of manufacture having a surface layer modification for corrosion resistance. Fe--Cr ferritic steels can be modified to enhance their corrosion resistance to liquid coal ash and other chemical environments, which have chlorides or sulfates containing active species. The steel is modified to form an aluminide/silicide passivating layer to reduce such corrosion.

Park, Jong-Hee (Clarendon Hills, IL); Natesan, Krishnamurti (Naperville, IL); Rink, David L. (Mokena, IL)

2010-03-16T23:59:59.000Z

144

Optimizing Cr(VI) and Tc(VII) remediation through nano-scale biomineral engineering  

SciTech Connect

To optimize the production of biomagnetite for the bioremediation of metal oxyanion contaminated waters, the reduction of aqueous Cr(VI) to Cr(III) by two biogenic magnetites and a synthetic magnetite was evaluated under batch and continuous flow conditions. Results indicate that nano-scale biogenic magnetite produced by incubating synthetic schwertmannite powder in cell suspensions of Geobacter sulfurreducens is more efficient at reducing Cr(VI) than either biogenic nano-magnetite produced from a suspension of ferrihydrite 'gel' or synthetic nano-scale Fe{sub 3}O{sub 4} powder. Although X-ray Photoelectron Spectroscopy (XPS) measurements obtained from post-exposure magnetite samples reveal that both Cr(III) and Cr(VI) are associated with nanoparticle surfaces, X-ray Magnetic Circular Dichroism (XMCD) studies indicate that some Cr(III) has replaced octahedrally coordinated Fe in the lattice of the magnetite. Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES) measurements of total aqueous Cr in the associated solution phase indicated that, although the majority of Cr(III) was incorporated within or adsorbed to the magnetite samples, a proportion ({approx}10-15 %) was released back into solution. Studies of Tc(VII) uptake by magnetites produced via the different synthesis routes also revealed significant differences between them as regards effectiveness for remediation. In addition, column studies using a {gamma}-camera to obtain real time images of a {sup 99m}Tc(VII) radiotracer were performed to visualize directly the relative performances of the magnetite sorbents against ultra-trace concentrations of metal oxyanion contaminants. Again, the magnetite produced from schwertmannite proved capable of retaining more ({approx}20%) {sup 99m}Tc(VII) than the magnetite produced from ferrihydrite, confirming that biomagnetite production for efficient environmental remediation can be fine-tuned through careful selection of the initial Fe(III) mineral substrate supplied to Fe(III)-reducing bacteria.

Cutting, R. S.; Coker, V. S.; Telling, N. D.; Kimber, R. L.; Pearce, C. I.; Ellis, B.; Lawson, R; van der Laan, G.; Pattrick, R.A.D.; Vaughan, D.J.; Arenholz, E.; Lloyd, J. R.

2009-09-09T23:59:59.000Z

145

Controllable resistive type fault current limiter (CR-FCL) with frequency and pulse duty-cycle  

Science Journals Connector (OSTI)

Abstract In this paper a controllable resistive type fault current limiter (CR-FCL) is introduced. The CR-FCL inserts a pre-specified value of resistance based on a pre-defined function, by using a simple switching method, in series with the fault current path. When a fault occurs, a self turn off switch starts switching with a pre-specified frequency and duty cycle. By this switching pattern, the controlled value of resistance enters to the fault current path. So, the CR-FCL limits the fault current to the desired values. In addition, from transient stability point of view, by inserting the optimal resistance value, the CR-FCL is capable to enhance power system transient stability in a good manner. In fact, generation of the controllable resistance that depends on the duty cycle of the self turn off switch is the main idea of the CR-FCL. The variable duty cycle results the variable resistance and the fixed duty cycle results the fixed resistance. Analytical analyses of the proposed FCL are presented in details. Simulation results by power system computer-aided design/electromagnetic transients, including dc (PSCAD/EMTDC) software and corresponding experimental results are studied to validate the effectiveness of the CR-FCL. Considering error analyses, there is the good agreement between the simulation results and the experimental results.

Seyed Behzad Naderi; Mehdi Jafari; Mehrdad Tarafdar Hagh

2014-01-01T23:59:59.000Z

146

Theoretical investigation of spin-filtering in CrAs/GaAs heterostructures  

SciTech Connect

The electronic structure of bulk zinc-blende GaAs, zinc-blende and tetragonal CrAs, and CrAs/GaAs supercells, computed within linear muffin-tin orbital (LMTO) local spin-density functional theory, is used to extract the band alignment for the [1,0,0] GaAs/CrAs interface in dependence of the spin orientation. With the lateral lattice constant fixed to the experimental bulk GaAs value, a local energy minimum is found for a tetragonal CrAs unit cell with a longitudinal ([1,0,0]) lattice constant reduced by ?2%. Due to the identified spin-dependent band alignment, half-metallicity of CrAs no longer is a key requirement for spin-filtering. Based on these findings, we study the spin-dependent tunneling current in [1,0,0] GaAs/CrAs/GaAs heterostructures within the non-equilibrium Green's function approach for an effective tight-binding Hamiltonian derived from the LMTO electronic structure. Results indicate that these heterostructures are promising candidates for efficient room-temperature all-semiconductor spin-filtering devices.

Stickler, B. A.; Ertler, C.; Ptz, W., E-mail: walter.poetz@uni-graz.at [Institute of Physics, Karl-Franzens Universitt Graz, Graz (Austria); Chioncel, L. [Institute of Physics, Theoretical Physics III, Center for Electronic Correlations and Magnetism, University of Augsburg, D-86135 Augsburg (Germany)

2013-12-14T23:59:59.000Z

147

Microstructure and Mechanical Properties of n-irradiated Fe-Cr Model Alloys  

SciTech Connect

High chromium ( 9-12 wt %) ferritic/martensitic steels are candidate structural materials for future fusion reactors and other advanced systems such as accelerator driven systems (ADS). Their use for these applications requires a careful assessment of their mechanical stability under high energy neutron irradiation and in aggressive environments. In particular, the Cr concentration has been shown to be a key parameter to be optimized in order to guarantee the best corrosion and swelling resistance, together with the least embrittlement. In this work, the characterization of the neutron irradiated Fe-Cr model alloys with different Cr % with respect to microstructure and mechanical tests will be presented. The behavior of Fe-Cr alloys have been studied using tensile tests at different temperature range ( from -160 deg. C to 300 deg. C). Irradiation-induced microstructure changes have been studied by TEM for two different irradiation doses at 300 deg. C. The density and the size distribution of the defects induced have been determined. The tensile test results indicate that Cr content affects the hardening behavior of Fe-Cr binary alloys. Hardening mechanisms are discussed in terms of Orowan type of approach by correlating TEM data to the measured irradiation hardening. (authors)

Matijasevic, Milena; Al Mazouzi, Abderrahim [Reactor materials research, SCK-CEN, Mol (Belgium)

2008-07-01T23:59:59.000Z

148

On the influence of Stark broadening on Cr I lines in stellar atmospheres  

E-Print Network (OSTI)

Using the semiclassical perturbation method, electron-, proton-, and ionized helium-impact line widths and shifts for the nine Cr I spectral lines from the $4p^7P^0-4d^7D$ multiplet, have been calculated for a perturbers density of 10$^{14}$ cm$^{-3}$ and temperatures T =2,500 - 50,000 K. The obtained results have been used to investigate the influence of Stark broadening effect in the Cr-rich Ap star $\\beta $ CrB atmosphere on line shapes of these lines. It has been found that the contribution of the proton and He II collisions to the line width and shift is significant, and it is comparable and sometimes (depending of the electron temperature) even larger than electron-impact contribution. Moreover, not only the Stark line width, but, depending on the electron-, proton-, and He\\ii density in stellar atmosphere also the Stark shift may contribute to the blue as well as to the red asymmetry of the same line. The obtained results have been used to investigate the influence of Stark broadening effect on line shapes of Cr\\i lines in the atmosphere of Cr-rich Ap star $\\beta $ CrB.

M. S. Dimitrijevic; T. Ryabchikova; L. C. Popovic; D. Shulyak; S. Khan

2005-01-30T23:59:59.000Z

149

Detection of charge transfer processes in Cr-doped SrTiO{sub 3} single crystals  

SciTech Connect

An insulator-to-metal transition is observed in Cr-doped SrTiO{sub 3} single crystals upon extended exposure to a high electric field, namely, electroconditioning (EC). Electron paramagnetic resonance (EPR) and transport measurements under laser irradiation show anticorrelation between the Cr{sup 3+} EPR signal and the electrical current. This proves that the Cr{sup 3+} ions are responsible for the photocurrent that initiates the EC process. We observe the presence of Cr{sup 3+}/Cr{sup 4+} mixed valencies in the bulk in the conducting state. The EPR characterization of the spectra in the conducting state excludes the possibility of a Cr{sup 3+}-oxygen vacancy complex in the bulk as a result of the EC.

La Mattina, F. [Physik-Institut der Universitaet Zuerich, Winterthurerstr. 190, CH-8057 Zuerich (Switzerland); IBM Research, Zurich Research Laboratory, Saeumerstr. 4, CH-8803 Rueschlikon (Switzerland); Bednorz, J. G.; Alvarado, S. F. [IBM Research, Zurich Research Laboratory, Saeumerstr. 4, CH-8803 Rueschlikon (Switzerland); Shengelaya, A. [Physics Institute of Tbilisi State University, Chavchavadze 3, GE-0128, Tbilisi (Georgia); Keller, H. [Physik-Institut der Universitaet Zuerich, Winterthurerstr. 190, CH-8057 Zuerich (Switzerland)

2008-07-14T23:59:59.000Z

150

Assessment of the compositional influences on the toughness of TiCr{sub 2}-base laves phase alloys  

SciTech Connect

Systematic studies of alloys based on TiCr{sub 2} have been performed in order to improve the toughness of Laves phase intermetallics. The extent to which alloy compositions and annealing treatments influence the toughness was quantified by Vickers indentation. The single-phase Laves behavior was first established by studying stoichiometric and nonstoichiometric TiCr{sub 2}. Next, alloying effects were investigated with ternary Laves phases based on TiCr{sub 2}. Different microstructures of two-phase alloys consisting of (Ti,Cr)-bcc+TiCr{sub 2} were also examined. Various toughening theories based on vacancies, site-substitutions, crystal structure (C14, C36, or C15) stabilization, and the presence of a second phase were evaluated. The most effective factors improving the toughness of TiCr{sub 2} were determined, and toughening mechanisms are suggested.

Chen, K.C.; Allen, S.M.; Livingston, J.D.

1997-03-01T23:59:59.000Z

151

Comparative studies of etching mechanisms of CR-39 in NaOH/H2O and NaOH/ethanol  

E-Print Network (OSTI)

Comparative studies of etching mechanisms of CR-39 in NaOH/H2O and NaOH/ethanol K.C.C. Tse, D Avenue, Kowloon Tong, Hong Kong Available online 13 May 2007 Abstract The bulk etch rate for CR-39 in NaOH/ethanol accumulates on the surface of CR-39 detector during etching in NaOH/ethanol, which is absent during etching

Yu, K.N.

152

Recent developments in Cr{sup 2+}-doped II-VI compound lasers  

SciTech Connect

Transition-metal-doped zinc chalcogenide crystals have recently been investigated as potential mid-IR lasers. Tetrahedrally-coordinated Cr{sup 2+} ions are especially attractive as lasants on account of high luminescence quantum yields for emission in the 2000-3000 nm range. {sup 5}E radiative lifetimes and emission cross sections are respectively {approximately}10 {mu}sec and {approximately}10{sup -18} cm{sup 2}. The associated absorption band peaked at {approximately}1800 nm enables laser-diode pumping of the Cr{sup 2+} systems. Laser demonstrations with ZnS:Cr and ZnSe:Cr (using a MgF{sub 2}:Co{sup 2+} laser pump source) gave slope efficiencies up to 30%. Excited-state-absorption losses appear small, and passive losses dominate. Tuning experiments with a birefringent filter evidence a tuning range covering at least 2280 - 2530 nm. Cr-doped laser samples can be produced by Bridgman growth, seeded physical vapor transport, or diffusion doping.

Page, R.H.; DeLoach, L.D.; Schaffers, K.I., Patel, F.D.; Beach, R.J.; Payne, S.A.; Krupke, W.F. [Lawrence Livermore National Lab., CA (United States); Burger, A. [Fisk Univ., Nashville, TN (United States). Center for Photonic Materials and Devices

1996-09-01T23:59:59.000Z

153

Reduction of Cr(VI) under acidic conditions by the facultative Fe(III)-reducing bacterium Acidiphilium cryptum  

SciTech Connect

The potential for biological reduction of Cr(VI) under acidic conditions was evaluated with the acidophilic, facultatively metal-reducing bacterium Acidiphilium cryptum strain JF-5 to explore the role of acidophilic microorganisms in the Cr cycle in low-pH environments. An anaerobic suspension of washed A. cryptum cells rapidly reduced 50 M Cr(VI) at pH 3.2; biological reduction was detected from pH 1.7-4.7. The reduction product, confirmed by XANES analysis, was entirely Cr(III) that was associated predominantly with the cell biomass (70-80%) with the residual residing in the aqueous phase. Reduction of Cr(VI) showed a pH optimum similar to that for growth and was inhibited by 5 mM HgCl2, suggesting that the reaction was enzyme-mediated. Introduction of O2 into the reaction medium slowed the reduction rate only slightly, whereas soluble Fe(III) (as ferric sulfate) increased the rate dramatically, presumably by the shuttling of electrons from bioreduced Fe(II) to Cr(VI) in a coupled biotic-abiotic cycle. Starved cells could not reduce Cr(VI) when provided as sole electron acceptor, indicating that Cr(VI) reduction is not an energy-conserving process in A. cryptum. We speculate, rather, that Cr(VI) reduction is used here as a detoxification mechanism.

David E. Cummings; Scott Fendorf; Rajesh K. Sani; Brent M. Peyton; Timothy S. Magnuson

2007-01-01T23:59:59.000Z

154

Visible Light-Driven Water Oxidation by Ir oxide Clusters Coupledto Single Cr Centers in Mesoporous Silica  

SciTech Connect

Visible light-induced water oxidation has been demonstrated at an Ir oxide nanocluster coupled to a single Cr{sup VI} site on the pore surface of MCM-41 mesoporous silica. The photocatalytic unit was assembled by the reaction of surface Cr=O groups with Ir(acac){sub 3} precursor followed by calcination at 300 C and bond formation monitored by FT-Raman and FT-IR spectroscopy. High-resolution Z-contrast electron micrographs of the calcined material combined with energy-dispersive X-ray spot analysis confirmed the occlusion of Ir oxide nanoparticles inside the mesopores. Oxygen evolution of an aqueous suspension of the Ir{sub x}O{sub y}-CrMCM-41 upon visible light irradiation of the Cr{sup VI}-O ligand-to-metal charge-transfer absorption was monitored mass-spectrometrically. Comparison of the product yields for samples with low Cr content (Cr/Si {le} 0.02) and high Cr content (Cr/Si = 0.05) indicates that only isolated Cr centers are capable of extracting electrons from Ir oxide clusters, while di- or polychromate species are not. Water oxidation at a multielectron-transfer catalyst coupled to a single metal center has not been demonstrated before. The ability to drive water oxidation with a single metal center as electron pump offers opportunities for coupling the oxygen-evolving photocatalytic unit to reducing sites in the nanoporous scaffold.

Nakamura, Ryuhei; Frei, Heinz

2006-07-10T23:59:59.000Z

155

Solid Solutions between CrO4-and SO4-Ettringite Ca6(Al(OH)6)2-  

E-Print Network (OSTI)

Solid Solutions between CrO4- and SO4-Ettringite Ca6(Al(OH)6)2- [(CrO4)x(SO4)1-x]3*26 H2O S A B I N to be incorporated as a solid solution with SO4 2- in ettringite. The formation of a solid solution (SS) could lower the soluble CrO4 2- concentrations. Ettringite containing SO4 2- or CrO4 2- and mixtures thereof have been

Wehrli, Bernhard

156

Dissimilar-weld failure analysis and development. Comparative behavior of similar and dissimilar welds. Final report. [Welds of 2-1/4Cr-1Mo to 2-1/4Cr-1Mo using 2-1/4Cr-1Mo filler material; and austenitic to ferritic steel welds made by fusion welding alloy-800H to 2-1/4Cr-1Mo using nickel base filler metal ERNiCr-3  

SciTech Connect

The 593/sup 0/C (1100/sup 0/F) stress rupture behavior of similar metal welds (SMWs) and dissimilar metal welds (DMWs) was investigated under cyclic load and cyclic temperature conditions to provide insight into the question, ''Why do DMWs fail sooner than SMWs in the fossil fuel boilers.'' The weld joints of interest were an all ferritic steel SMW made by fusion welding 2-1/4Cr-1Mo to 2-1/4Cr-1Mo using 2-1/4Cr-1Mo filler metal and an austenitic to ferritic steel DMW made by fusion welding Alloy-800H to 2-1/4Cr-1Mo using a nickel base filler metal ERNiCr-3. The stress rupture behavior obtained on cross weld specimens was similar for both types of welds with only a 20% reduction in rupture life for the DMW. For rupture times less than 1500 hours, failures occurred in the 2-1/4Cr-1Mo base metal whereas, for rupture times greater than 1500 hours, failures occurred in the 2-1/4Cr-1Mo heat affected zone (HAZ). The HAZ failures exhibited a more brittle appearance than the base metal failures for both types of welds and it appears that the life of both joints was limited by the stress rupture properties of the HAZ. These results support the hypothesis that increased residual stresses due to abrupt changes in hardness (strength) of metals involved are the major contributors to the reduction in life of DMWs as compared to SMWs. 10 refs., 15 figs., 7 tabs.

Busboom, H.; Ring, P.J.

1986-07-01T23:59:59.000Z

157

Audit Report: CR-B-02-01 | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

CR-B-02-01 CR-B-02-01 Audit Report: CR-B-02-01 October 15, 2001 Fixed-Price Contracting for Department of Energy Cleanup Activities As part of its Contract Reform effort, the Department of Energy (Department) acted to increase its use of fixed-price contracts. This shift was designed to increase the cost-effectiveness of operations. Since October 1994, the Office of Environmental Management (EM) has awarded a number of fixed-price contracts for environmental cleanup activities. In so doing, EM expected significant cost savings when compared to approaches previously employed by management and operating contractors. Accurately estimating those savings is crucial to contracting strategy and project funding decisions, as well as the Department's overall environmental cleanup strategy. The objective of our audit was to determine if the cost

158

A diagnosis of intense ion beam by CR-39 detectors analyzing the back scattered particles  

SciTech Connect

A new diagnosis method has been developed utilizing back scattered particles for high energy intense ion beams. The CR-39 detector mounted on the uniform back-scatterer was irradiated with {sup 4}He{sup 2+} ions with an energy 25 MeV/n, which is never recorded as etchable track in CR-39. We found that it is possible to diagnose by analyzing the etch pits on the rear surface of CR-39 that directly contacted on the back-scatterers. It turns out that most of etch pits in the rear surface are made by the backscattered particles by investigating the growth pattern of each etch pit with multi-step etching technique. This method allows simple diagnosis of the ion beam profile and intensity distribution in mixed radiation field such as laser-driven ion acceleration experiments.

Kanasaki, Masato; Yamauchi, Tomoya; Fukuda, Yuji; Sakaki, Hironao; Hori, Toshihiko; Tampo, Motonobu; Kurashima, Satoshi; Kamiya, Tomihiro; Oda, Keiji; Kondo, Kiminori [Graduate School of Maritime Sciences, Kobe University, Kobe 658-0022, Japan and Japan Atomic Energy Agency, Kizugawa, Kyoto 619-0215 (Japan); Graduate School of Maritime Sciences, Kobe University, Kobe 658-0022 (Japan); Japan Atomic Energy Agency, Kizugawa, Kyoto 619-0215 (Japan); Japan Atomic Energy Agency, Takasaki, Gunma 370-1292 (Japan); Graduate School of Maritime Sciences, Kobe University, Kobe 658-0022 (Japan); Japan Atomic Energy Agency, Kizugawa, Kyoto 619-0215 (Japan)

2012-07-11T23:59:59.000Z

159

CrRb: A molecule with large magnetic and electric dipole moments  

SciTech Connect

We report calculations of Born-Oppenheimer potential energy curves of the chromium-rubidium heteronuclear molecule ({sup 52}Cr{sup 87}Rb), and the long-range dispersion coefficient for the interaction between ground state Cr and Rb atoms. Our calculated van der Waals coefficient (C{sub 6}=1770 a.u.) has an expected error of 3%. The ground state {sup 6{Sigma}+} molecule at its equilibrium separation has a permanent electric dipole moment of d{sub e}(R{sub e}=3.34Angstrom)=2.90 D. We investigate the hyperfine and dipolar collisions between trapped Cr and Rb atoms, finding elastic to inelastic cross section ratio of 10{sup 2}-10{sup 3}.

Pavlovic, Z. [ITAMP, Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts 02138 (United States); Department of Physics, University of Connecticut, Storrs, Connecticut 06269-3046 (United States); Sadeghpour, H. R. [ITAMP, Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts 02138 (United States); Cote, R. [Department of Physics, University of Connecticut, Storrs, Connecticut 06269-3046 (United States); Roos, B. O. [Department of Theoretical Chemistry, University of Lund, S-221 00 Lund (Sweden)

2010-05-15T23:59:59.000Z

160

Spin injection and filtering in halfmetal/semiconductor (CrAs/GaAs) heterostructures  

SciTech Connect

Theoretical investigations of spin-dependent transport in GaAS/CrAs/GaAs halfmetal-semiconductor heterostructures indicate that this system is a candidate for an efficient room temperature spin injector and filter. The spin dependent electronic structure of zincblende CrAs and the band offset between GaAs and CrAs are determined by ab-initio calculations within the method of linear muffin tin orbitals (LMTO). This band structure is mapped onto an effective sp{sup 3}d{sup 5}s* nearest neighbor tight-binding (TB) Hamiltonian and the steady-state transport characteristic is calculated within a non-equilibrium Greens function approach. Even at room temperature we find current spin polarizations up to 97%.

Stickler, B. A.; Ertler, C.; Ptz, W. [Institute of Physics, Karl-Franzens Universitt Graz (Austria); Chioncel, L. [Institute of Physics, Universitt Augsburg (Germany); Arrigoni, E. [Institute of Theoretical and Computational Physics, TU Graz (Austria)

2013-12-04T23:59:59.000Z

Note: This page contains sample records for the topic "ire cr eek" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Switching of the exchange bias in Fe/Cr(211) double-superlattice structures  

SciTech Connect

The reversal of the direction of the exchange bias in a ''double-superlattice'' system which consists of an Fe/Cr antiferromagnetic (AF) superlattice which is ferromagnetically coupled with an Fe/Cr ferromagnetic (F) superlattice through a Cr spacer layer, is observed. Magnetometry and polarized neutron reflectometry show that a switch in the bias direction occurs at a field ({approx}447 Oe) well below the field (14 kOe) necessary to saturate the AF superlattice and well below the field (2 kOe) where the AF superlattice initiates a spin-flop transition. The switching of the exchange bias cannot be explained in terms of a model of uniform rotation, but rather by breakdown into domains and reversal of the AF layers. The transparency of magnetic behavior of the double superlattice may be useful in understanding the behavior of traditional exchange bias systems. (c) 2000 American Institute of Physics.

Velthuis, S. G. E. te [Argonne National Laboratory, Argonne, Illinois 60439 (United States); Jiang, J. S. [Argonne National Laboratory, Argonne, Illinois 60439 (United States)] [Argonne National Laboratory, Argonne, Illinois 60439 (United States); Felcher, G. P. [Argonne National Laboratory, Argonne, Illinois 60439 (United States)] [Argonne National Laboratory, Argonne, Illinois 60439 (United States)

2000-10-02T23:59:59.000Z

162

Audit Report: CR-B-99-02 | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Report: CR-B-99-02 Report: CR-B-99-02 Audit Report: CR-B-99-02 September 30, 1999 Management of Unneeded Materials and Chemicals For more than 50 years, the U.S. Department of Energy (Department) and its contractors operated large production facilities and laboratories that acquired and produced directly or as by-products enormous amounts of non-nuclear materials such as sodium, lead, chemicals, and scrap metal. However, a mission change resulting from the end of the Cold War called into question the need for continued stockpiling of these materials. In the past, the Department has conducted reviews that have identified inefficiencies and recommended improvements to the materials management function. The objective of this audit was to determine if the Department efficiently disposed of its unneeded materials.

163

Precipitation behavior of Ni-Cr-22 Fe-18 Mo (Hastelloy-X) and Ni-Cr-22 Co-12 Mo (Inconel-617) after isothermal aging  

SciTech Connect

The precipitation behavior of the nickel-base alloys Ni-Cr-22Fe-18Mo (Hastelloy-X) and Ni-Cr-22Co12Mo (Inconel-617) has been investigated as a function of aging temperature. Hastelloy-X shows that M/sub 6/C and TiN are primary precipitates and M/sub 12/C, A/sub 3/B/sub 2/ (approx. = Fe/sub 3/Mo/sub 2/), and M/sub 23/C/sub 6/ are secondary precipitates, while Inconel-617 also has M/sub 6/C and TiN as primary precipitates and M/sub 23/C/sub 6/, M/sub 12/C, and Ni/sub 3/AlTi as secondary precipitates. The characterization has been carried out by metallographic and transmission electron microscopy investigations and by x-ray examinations of electrochemical isolated precipitates.

Kirchhofer, H.; Nickel, H.; Schubert, F.

1984-07-01T23:59:59.000Z

164

Magnetic and electrical properties of layered magnets Tl(Cr,Mn,Co)Se{sub 2}  

SciTech Connect

Tl(Cr,Mn,Co)Se{sub 2} crystals were synthesized at T {approx} 1050 K. X-ray diffraction analysis showed that TlCrSe{sub 2}, TlMnSe{sub 2}, and TlCoSe{sub 2} compounds crystallize in the hexagonal crystal system with the lattice parameters: a = 3.6999 A, c = 22.6901 A, c/a {approx} 6.133, z = 3, {rho}{sub x} = 6.209 g/cm{sup 3}; a = 6.53 A, c = 23.96 A, c/a {approx} 3.669, z = 8, {rho}{sub x} = 6.71 g/cm{sup 3}; and a = 3.747 A, c = 22.772 A, c/a {approx} 6.077, z = 3, {rho}{sub x} = 7.577 g/cm{sup 3}, respectively. Magnetic and electrical studies in the temperature range from 80-400 K showed that TlCrSe{sub 2} is a semiconductor ferromagnet, TlMnSe{sub 2} is a semiconductor antiferromagnet, and TlCoSe{sub 2} is a ferrimagnet with a conductivity characteristic of metals. A rather large deviation in the experimental effective magnetic moment for TlCrSe{sub 2} (3.05 {mu}B) from the theoretical value (3.85 {mu}B) is attributed to two-dimensional magnetic ordering in the paramagnetic region of the noticeably layered ferromagnet TlCrSe{sub 2}. In TlCrSe{sub 2}, a correlation between magnetic and electrical properties was detected.

Veliyev, R. G.; Sadikhov, R. Z.; Kerimova, E. M., E-mail: ekerimova@physics.ab.az; Asadov, Yu. G.; Jabbarov, A. I. [National Academy of Sciences of Azerbaijan, Institute of Physics (Azerbaijan)

2009-02-15T23:59:59.000Z

165

/sup 51/Cr-EDTA: a marker of early intestinal rejection in the rat  

SciTech Connect

Intestinal permeability was studied after accessory intestinal transplantation in Lewis rats. Five groups were evaluated: Group 1--isografts (N = 6); Group 2--Lewis X Brown Norway F1 (LBN-F1) allografts (N = 6); Group 3--isografts treated with CsA 2 mg/kg/day X 10 days (N = 6); Group 4--LBN-F1 allografts treated with CsA 2 mg/kg/day X 10 days (N = 6); Group 5--LBN-F1 allografts treated with CsA 4 mg/kg/day X 28 days (N = 6). Chromium-labeled ethylenedimianetetraacetate (/sup 51/Cr-EDTA) was given through the proximal stoma of the graft. Renal clearance of /sup 51/Cr-EDTA and mucosal biopsies were followed post-transplant. The biopsies of the intestinal graft showed no rejection in Groups 1, 3, and 5; fulminant rejection in Group 2; and mild atypical rejection in Group 4. /sup 51/Cr-EDTA clearance was elevated in all groups during the first 7 days post-transplant. Thereafter, /sup 51/Cr-EDTA excretion fell to lower levels in the animals with histologically normal grafts (Groups 1, 3, and 5). /sup 51/Cr-EDTA excretion in Group 4 was increased with the first histological evidence of rejection on Day 14 and remained elevated until sacrifice (P less than 0.02 compared to Groups 3 and 5). A transient permeability defect occurs after intestinal grafting. Once the graft has recovered from this injury, /sup 51/Cr-EDTA is a sensitive marker for intestinal rejection.

Grant, D.; Lamont, D.; Zhong, R.; Garcia, B.; Wang, P.; Stiller, C.; Duff, J.

1989-05-01T23:59:59.000Z

166

Accumulation of Amorphous Cr(III)Te(IV) Nanoparticles on the Surface of Shewanella oneidensis MR-1 through Reduction of Cr(VI)  

Science Journals Connector (OSTI)

Industrial effluents constitute a major source of metal pollution of aquatic bodies. ... Before the XAFS measurement, all samples were maintained in argon (Ar) atmosphere in order to remove any air-borne contamination leading to sample oxidation. ... (-500 mV vs. Ag/AgCl) showed that a mediatorless MR-1 biocathode started up under aerated conditions in the presence of lactate, received 5.5 and 1.7 times more electrons for Cr(VI) redn. ...

Dong-Hun Kim; Sunhwa Park; Min-Gyu Kim; Hor-Gil Hur

2014-11-13T23:59:59.000Z

167

Microstructure and High Temperature Oxidation Behavior of Cr-W Alloys  

SciTech Connect

Cr alloys containing 0-30%W by weight were investigated for use in elevated temperature applications. The alloys were melted in a water-cooled, copper-hearth arc furnace. Microstructure of the alloys was characterized using x-ray diffraction, scanning electron microscopy, and light microscopy. A pseudocyclic oxidation test was employed to study scale formation at 1000C in dry air. The scale was predominantly chromia and spalled upon cooling. Alloying with aluminum up to 8 weight percent reduced the spalling drastically. Furthermore, aluminizing the surface of the Cr-W alloys completely stopped the spalling.

Dogan, O.N.

2007-02-01T23:59:59.000Z

168

Silicon's role in determining swelling in neutron-irradiated Fe-Cr-Ni-Si alloys  

SciTech Connect

Two silicon-modified alloy series, one based on Fe-15Cr-20Ni and another based on Fe-15Cr-25Ni were irradiated at target temperatures between 399 and 649{degree}C in EBR-II. The influence of silicon on swelling is more complex than previously envisioned and indicates that silicon plays two or more competing roles while in solution. Radiation-induced formation of {gamma}{prime} (Ni{sub 3}Si) precipitates is dependent on silicon and nickel content, as well as temperature. Precipitation of {gamma}{prime} appears to play only a minor role in void formation.

Sekimura, N. (Tokyo Univ., Tokai, Ibaraki (Japan)); Garner, F. A. (Pacific Northwest Lab., Richland, WA (United States)); Newkirk, J.W. (Missouri Univ., Rolla, MO (United States))

1991-11-01T23:59:59.000Z

169

Toughness of Cr-Mo-V steels for steam-turbine rotors  

SciTech Connect

Cr-Mo-V steels are used extensively as the rotor material in the High Pressure and Intermediate Pressure Sections of modern steam turbines. The toughness of these rotors has a major influence on the reliability and efficiency of the turbine and the overall economy of operation and maintenance of the plant. The metallurgical factors affecting the toughness of the rotors and the methods to improve the toughness are now understood better than ever before. This paper will present a broad overview of the materials and design aspects of the toughness of Cr-Mo-V rotors with emphasis on the salient results of recent research programs aimed at improving their toughness.

Viswanathan, R.; Jaffee, R.I.

1982-04-01T23:59:59.000Z

170

Pulsed electrospark deposition of MAX phase Cr2AlC based coatings on titanium alloy  

Science Journals Connector (OSTI)

Abstract Coatings with a high amount of MAX phase were obtained onto Ti substrate using the pulsed electrospark deposition (PED) technique and Cr2AlC electrode material (??). The structure and phase formation of the coatings generated at different modes were studied. It was found, that a layer of titanium carbide was formed during the initial stage of the deposition at the interface as a result of chemical reaction between Cr2AlC electrode and Ti substrate which further acts as a diffusion barrier.

E.I. Zamulaeva; E.A. Levashov; T.A. Sviridova; N.V. Shvyndina; M.I. Petrzhik

2013-01-01T23:59:59.000Z

171

Removal of B, Cr, Mo, and Se from Wastewater by Incorporation into Hydrocalumite and Ettringite  

Science Journals Connector (OSTI)

Removal of B, Cr, Mo, and Se from Wastewater by Incorporation into Hydrocalumite and Ettringite ... During the leaching of fly ash in alkaline environments, hydrocalumite (Ca4Al2(OH)12(OH)26H2O) and ettringite (Ca6Al2(OH)12(SO4)326H2O) form as secondary precipitates. ... In this study, the removal of B, Cr, Mo, and Se oxyanions from high pH waters by incorporation into hydrocalumite and ettringite was examined. ...

Min Zhang; Eric J. Reardon

2003-06-03T23:59:59.000Z

172

Substitution of modified 9 Cr-1 Mo steel for austentic stainless steels  

SciTech Connect

This report describes the current program to develop a high-strength ferritic-martensitic steel. The alloy is essentially Fe-9% Cr-1% Mo with small additions of V and Nb and is known as modifed 9 Cr-1 Mo steel. Its elevated-temperature properties and design allowable stresses match those of type 304 stainless steel for temperatures up to 600/sup 0/C and exceed those of other ferritic steels by factors of 2 to 3. The improved strength of this alloy permits its use in place of stainless steels for many applications.

Sikka, V. K.

1982-04-01T23:59:59.000Z

173

Oxygen-17 NMR Shifts Caused by Cr{Sup ++} in Aqueous Solutions  

DOE R&D Accomplishments (OSTI)

Cr{sup ++} in solution produces a paramagnetic shift in the NMR absorption of O{sup 17} in ClO{sub 4}{sup -}, as well as the expected paramagnetic shift for O{sup 17} in H{sub 2}O. As the concentration of ClO{sub 4}{sup -} increases, the shift in the H{sub 2}O{sup 17} absorption is diminished, and eventually changes sign. The effects are ascribed to preferential replacement by ClO{sub 4}{sup -} of water molecules from the axial positions in the first coordination sphere about Cr{sup ++}.

Jackson, J. A.; Lemons, J. F.; Taube, H.

1962-00-00T23:59:59.000Z

174

Can one identify the intrinsic structure of the yrast states in $^{48}$Cr after the backbending?  

E-Print Network (OSTI)

The backbending phenomenon in $^{48}$Cr has been investigated using the recently developed Projected Configuration Interaction (PCI) method, in which the deformed intrinsic states are directly associated with shell model (SM) wavefunctions. Two previous explanations, (i) $K=0$ band crossing, and (ii) $K=2$ band crossing have been reinvestigated using PCI, and it was found that both explanations can successfully reproduce the experimental backbending. The PCI wavefunctions in the pictures of $K=0$ band crossing and $K=2$ band crossing are highly overlapped. We conclude that there are no unique intrinsic states associated with the yrast states after backbending in $^{48}$Cr.

Gao, Zao-Chun; Chen, Y S; Chen, Y J; Tuya,

2010-01-01T23:59:59.000Z

175

Can one identify the intrinsic structure of the yrast states in $^{48}$Cr after the backbending?  

E-Print Network (OSTI)

The backbending phenomenon in $^{48}$Cr has been investigated using the recently developed Projected Configuration Interaction (PCI) method, in which the deformed intrinsic states are directly associated with shell model (SM) wavefunctions. Two previous explanations, (i) $K=0$ band crossing, and (ii) $K=2$ band crossing have been reinvestigated using PCI, and it was found that both explanations can successfully reproduce the experimental backbending. The PCI wavefunctions in the pictures of $K=0$ band crossing and $K=2$ band crossing are highly overlapped. We conclude that there are no unique intrinsic states associated with the yrast states after backbending in $^{48}$Cr.

Zao-Chun Gao; Mihai Horoi; Y. S. Chen; Y. J. Chen; Tuya

2010-08-02T23:59:59.000Z

176

RIMS analysis of Ca and Cr in genesis solar wind collectors.  

SciTech Connect

RIMS depth profiles have been measured for Cr and Ca in Genesis solar wind collector made from Si and compared to such measurements for ion-implanted Si reference material. The presence of surface contamination has been shown to be a significant factor influencing the total Ca and Cr fluence measured in the Genesis collectors. A procedure to remove the contaminant signal from these depth profiles using the reference material implanted with a minor isotope demonstrated that 36% of the measured Ca fluence in our Genesis sample comes from terrestrial contamination.

Veryovkin, I. V.; Tripa, C. E.; Zinovev, A. V.; King, B. V.; Pellin, M. J.; Burnett, D. S.; Materials Science Division; Univ. of Newcastle; California Inst. of Tech.

2011-01-01T23:59:59.000Z

177

Spin polarization at Fe/Cr interfaces L. Pizzagalli, M. Freyss, G. Moraitis, D. Stoeffler, C. Demangeat, and H. Dreysse  

E-Print Network (OSTI)

configuration with zero net moment of a thin Fe layer on a Cr surface due to a high step density. © 1997.g., a zero net magnetic moment of a Cr layer grown on a stepped Fe surface.6 It will be shown below how some irregularities at the interfaces. The spin-polarized electronic charge distribution was calculated by using

Bayreuther, Günther

178

High-energy, high-efficiency harmonic generation from a Cr:LiSrAlF6 laser system  

Science Journals Connector (OSTI)

We have developed a near-diffraction-limited Q-switched Cr:LiSrAlF6 (Cr:LiSAF) laser system capable of producing 860-nm, 400-mJ pulses at a repetition rate of 2 Hz. Our...

Zenzie, H H; Isyanova, Y

1995-01-01T23:59:59.000Z

179

USE OF MICRO X-RAY ABSORPTION SPECTROSCOPY AND DIFFRACTION TO DELINEATE Cr(VI) SPECIATION IN COPR  

SciTech Connect

The speciation of Cr(VI) in Cromite Ore Processing Residue was investigated by means of bulk XRD, and a combination of micro-XRF, -XAS and -XRD at the Advanced Light Source (ALS), Berkeley, CA, U.S.A.. Bulk XRD yielded one group of phases that contained explicitly Cr(VI) in their structure, Calcium Aluminum Chromium Oxide Hydrates, accounting for 60% of the total Cr(VI). Micro-analyses at ALS yielded complimentary information, confirming that hydrogarnets and hydrotalcites, two mineral groups that can host Cr(VI) in their structure by substitution, were indeed Cr(VI) sinks. Chromatite (CaCrO4) was also identified by micro-XRD, which was not possible with bulk methods due to its low content. The acquisition of micro-XRF elemental maps enabled not only the identification of Cr(VI)-binding phases, but also the understanding of their location within the matrix. This information is invaluable when designing Cr(VI) treatment, to optimize release and availability for reduction.

CHRYSOCHOOU, M.; MOON, D. H.; FAKRA, S.; MARCUS, M.; DERMATAS, D.; CHRISTODOULATOS, C.

2010-06-22T23:59:59.000Z

180

Chromium(VI) bioremoval by pseudomonas bacteria: role of microbial exudates for natural attenuation and biotreatment of Cr(VI) contamination  

SciTech Connect

Laboratory batch and column experiments were conducted to investigate the role of microbial exudates, e.g., exopolymeric substance (EPS) and alginic acid, on microbial Cr(VI) reduction by two different Pseudomonas strains (P. putida P18 and P. aeuroginosa P16) as a method for treating subsurface environment contaminated with Cr(VI). Our results indicate that microbial exudates significantly enhanced microbial Cr(VI) reduction rates by forming less toxic and highly soluble organo-Cr(III) complexes despite the fact Cr(III) has a very low solubility under the experimental conditions studied (e.g., pH 7). The formation of soluble organo-Cr(III) complexes led to the protection of the cells and chromate reductases from inactivation. In systems with no organic ligands, soluble organo-Cr(III) end products were formed between Cr(III) and the EPS directly released by bacteria due to cell lysis. Our results also provide evidence that cell lysis played an important role in microbial Cr(VI) reduction by Pseudomonas bacteria due to the release of constitutive reductases that intracellularly and/or extracellularly catalyzed the reduction of Cr(VI) to Cr(III). The overall results highlight the need for incorporation of the release and formation of organo-Cr(III) complexes into reactive transport models to more accurately design and monitor in situ microbial remediation techniques for the treatment of subsurface systems contaminated with Cr(VI).

Dogan, N.M.; Dodge, C.; Kantar, C.; Gulcan, S.; Yilmaz, B.C.; Mazmanci, M.A.

2011-02-14T23:59:59.000Z

Note: This page contains sample records for the topic "ire cr eek" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Chromium(VI) Bioremoval by Pseudomonas Bacteria: Role of Microbial Exudates for Natural Attenuation and Biotreatment of Cr(VI) Contamination  

SciTech Connect

Laboratory batch and column experiments were conducted to investigate the role of microbial exudates, e.g., exopolymeric substance (EPS) and alginic acid, on microbial Cr(VI) reduction by two different Pseudomonas strains (P. putida P18 and P. aeuroginosa P16) as a method for treating subsurface environment contaminated with Cr(VI). Our results indicate that microbial exudates significantly enhanced microbial Cr(VI) reduction rates by forming less toxic and highly soluble organo-Cr(III) complexes despite the fact Cr(III) has a very low solubility under the experimental conditions studied (e.g., pH 7). The formation of soluble organo-Cr(III) complexes led to the protection of the cells and chromate reductases from inactivation. In systems with no organic ligands, soluble organo-Cr(III) end products were formed between Cr(III) and the EPS directly released by bacteria due to cell lysis. Our results also provide evidence that cell lysis played an important role in microbial Cr(VI) reduction by Pseudomonas bacteria due to the release of constitutive reductases that intracellularly and/or extracellularly catalyzed the reduction of Cr(VI) to Cr(III). The overall results highlight the need for incorporation of the release and formation of organo-Cr(III) complexes into reactive transport models to more accurately design and monitor in situ microbial remediation techniques for the treatment of subsurface systems contaminated with Cr(VI).

N Mercan Dogan; C Kantar; S Gulcan; C Dodge; B Coskun Yilmaz; M Ali Mazmanci

2011-12-31T23:59:59.000Z

182

Audit of Department of Energy Support Service Contracting, CR-B-95-06  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

DEPARTMENT OF ENERGY DEPARTMENT OF ENERGY OFFICE OF INSPECTOR GENERAL AUDIT OF DEPARTMENT OF ENERGY SUPPORT SERVICE CONTRACTING Report Number: Capital Regional Audit Office Date of Issue: Germantown, MD 20874 REPORT NO. U.S. DEPARTMENT OF ENERGY RELEASE DATE OFFICE OF INSPECTOR GENERAL CR-B-95-06 JUNE 30, 1995 _________________________________________________________________ _______________________ AUDIT OF DEPARTMENT OF ENERGY SUPPORT SERVICE CONTRACTING

183

Project EARTH-11-DP1: Exploring early solar system processes using Cr isotopes  

E-Print Network (OSTI)

Project EARTH-11-DP1: Exploring early solar system processes using Cr isotopes Supervisors: Dr D Porcelli & Dr K Amor Various isotope methods have been recently developed to explore the conditions in the early solar system and the processes that have led to the formation of the terrestrial planets. Stable

Henderson, Gideon

184

NASA/CR-2001-210853 ICASE Report No. 2001-7  

E-Print Network (OSTI)

NASA/CR-2001-210853 ICASE Report No. 2001-7 Tactical Conflict Detection and Resolution in a 3-D April 2001 #12;The NASA STI Program Office... in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA Scientific and Technical Information (STI) Program

Muñoz, César A.

185

NASA/CR-2001-211271 ICASE Interim Report No. 39  

E-Print Network (OSTI)

NASA/CR-2001-211271 ICASE Interim Report No. 39 Real Automation in the Field C6sar Mu_oz ICASE, Hampton, Virginia Micaela Mayero INRIA, Le Chesnay Cedex, France December 2001 #12;The NASA STI Program Office... in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics

Muñoz, César A.

186

NASA/CR-2000-210097 ICASE Report No. 2000-16  

E-Print Network (OSTI)

NASA/CR-2000-210097 ICASE Report No. 2000-16 Aircraft Trajectory Modeling and Alerting Algorithm Verification Cdsar Muhoz ICASE, Hampton, Virginia Victor Carreho NASA Langley Research Center, Hampton, Virginia April 2000 #12;The NASA STI Program Office... in Profile Since its founding, NASA has been

Muñoz, César A.

187

NASA/CR-2000-209851 ICASE Report No. 2000-4  

E-Print Network (OSTI)

NASA/CR-2000-209851 ICASE Report No. 2000-4 Towards a Customizable PVS Gerald Liittgen and C_sar Mu_oz ICASE, Hampton, Virginia Ricky Butler, Ben Di Vito, and Paul Miner NASA Langley Research Center, Hampton, Virginia January2000 #12;The NASA STI Program Office... in Profile Since its founding, NASA has been

Muñoz, César A.

188

NASA/CR-2003-212418 NIA Report No. 2003-03  

E-Print Network (OSTI)

NASA/CR-2003-212418 NIA Report No. 2003-03 Rapid Prototyping in PVS César A. Muñoz National Institute of Aerospace, Hampton, Virginia November 2003 #12;The NASA STI Program Office . . . in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science

Muñoz, César A.

189

NASA/CR-2007-214546 NIA Report No. 2007-03  

E-Print Network (OSTI)

NASA/CR-2007-214546 NIA Report No. 2007-03 Batch Proving and Proof Scripting in PVS Cesar A. Munoz National Institute of Aerospace (NIA), Hampton, Virginia February 2007 #12;The NASA STI Program Office . . . in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science

Muñoz, César A.

190

NASA/CR-2002-211759 ICASE Report No. 2002-26  

E-Print Network (OSTI)

NASA/CR-2002-211759 ICASE Report No. 2002-26 A Logical Process Calculus Rance Cleaveland State, Sheffield, United Kingdom August 2002 #12;The NASA STI Program Office . . . in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA Scientific

Lüttgen, Gerald

191

NASA/CR-2007-214863 NIA Report No. 2007-06  

E-Print Network (OSTI)

NASA/CR-2007-214863 NIA Report No. 2007-06 In-Trail Procedure (ITP) Algorithm Design Cesar A. Munoz and Radu I. Siminiceanu National Institute of Aerospace (NIA), Hampton, Virginia August 2007 #12;The NASA STI Program Office . . . in Profile Since its founding, NASA has been dedicated to the advancement

Muñoz, César A.

192

NASA/CR-97-206268 ICASE Report No. 97-68  

E-Print Network (OSTI)

NASA/CR-97-206268 ICASE Report No. 97-68 _th ,NNIVERSARY Essential Elements of Computational Algorithms for Aerodynamic Analysis and Design Antony Jameson December 1997 #12;The NASA STI Program Off'we... in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science

Jameson, Antony

193

NASA/CR-2009-215703 NIA Report No. 2008-09  

E-Print Network (OSTI)

April 2009 NASA/CR-2009-215703 NIA Report No. 2008-09 Design and Verification of a Distributed #12;NASA STI Program . . . in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA scientific and technical information (STI) program plays a key part

Muñoz, César A.

194

NASA/CR-2002-211637 ICASE Report No. 2002-12  

E-Print Network (OSTI)

NASA/CR-2002-211637 ICASE Report No. 2002-12 Air Traffic Conflict Resolution and Recovery Aljons Kirchner ENA C, Toulouse, France May 2002 #12;The NASA STI Program Office... in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA Scientific

Muñoz, César A.

195

CREEP STRENGTH OF HIGH CR FERRITIC STEELS DESIGNED USING NEURAL NETWORKS AND PHASE STABILITY CALCULATIONS  

E-Print Network (OSTI)

CREEP STRENGTH OF HIGH CR FERRITIC STEELS DESIGNED USING NEURAL NETWORKS AND PHASE STABILITY Development of heat-resistant steel for power boilers and turbines has been ongoing for about five decades. This has led to an increase in the thermal efficiency of power plants whenever innovative steels have been

Cambridge, University of

196

Study of hydrogen and carbon monoxide adsorption on modified Zn/Cr catalysts by adsorption calorimetry  

SciTech Connect

Differential heat of adsorption (q) of hydrogen (a) and carbon monoxide (b) as a function of the adsorbed amount (a) on Zn/Cr catalysts at 463/sup 0/K; 1) unpromoted catalyst, 2) catalyst promoted with 2.5% of K/sub 2/O.

Yoshin, S.V.; Klyacho, A.L.; Kondrat'ev, L.T.; Leonov, V.E.; Skripchenko, G.B.; Sushchaya, L.E.

1986-08-01T23:59:59.000Z

197

Crack initiation and crack growth resistance of Ti-48Al-2Cr sheet material  

SciTech Connect

The present paper reports on the fracture toughness tests conducted on Ti-48Al-2Cr sheet material with near-gamma microstructure produced by hot rolling. Compact tension specimens were sectioned from sheet material and tested at room temperature to determine the fracture toughness and crack growth resistance curves. The deformation and fracture behavior were studied on tested specimens.

Dogan, B.; Schwalbe, K.H. [GKSS Research Centre, Geesthacht (Germany)] [GKSS Research Centre, Geesthacht (Germany); Clemens, H. [Plansee AG, Reutte (Austria)] [Plansee AG, Reutte (Austria)

1998-03-03T23:59:59.000Z

198

G. J. Snyder Page 1 of 6 THERMOELECTRIC PROPERTIES OF CR3S4-TYPE SELENIDES  

E-Print Network (OSTI)

devices depends primarily on increasing the figure of merit, ZT, for thermoelectric materials. The figure thermoelectric materials is to search for semiconductors with low lattice thermal conductivity. In this paper we lower than the state-of-the-art thermoelectric material, Bi2Te3 alloys. The structure of Cr3S4 (Figure 1

199

Magnetic anisotropy in Fe-25Cr-12Co-1Si alloy induced by external magnetic field  

E-Print Network (OSTI)

Magnetic anisotropy in Fe-25Cr-12Co-1Si alloy induced by external magnetic field ZHEN Liang( )1 of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China; 2. Department. Curriculum in Applied and Materials Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC

Qin, Lu-Chang

200

Comparison of SEM and Optical Analysis of DT Neutron Tracks in CR-39 Detectors  

SciTech Connect

A solid state nuclear track detector, CR-39, was exposed to DT neutrons. After etching, the resultant tracks were analyzed using both an optical microscope and a scanning electron microscope (SEM). In this communication, both methods of analyzing DT neutron tracks are discussed.

P.A. Mosier-Boss, L.P.G. Forsley, P. Carbonnelle, M.S. Morey, J.R. Tinsley, J. P. Hurley, F.E. Gordon

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ire cr eek" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Supporting Information for Spectral studies of a Cr(PNP)-MAO system for selective ethylene  

E-Print Network (OSTI)

Supporting Information for Spectral studies of a Cr(PNP)-MAO system for selective ethylene and Characterization S2-S4 Spectroscopic Studies of MAO Activation S4-S5 Ethylene Trimerization Trials S5-S6 Scheme S1 of ethylene S14 Table S1. Ethylene trimerization trials for 2/MAO in different solvents S15 Table S2. Summary

Martin, Alain

202

Relaxor ferroelectricity and colossal magnetocapacitive coupling in ferromagnetic CdCr2S4  

Science Journals Connector (OSTI)

... it is clear now that ferroelectric ferromagnets are rare and mostly exhibit rather weak ferromagnetism. Spinel compounds are an important class of materials, and their electronic properties have been the ... that is characteristic of this system. Here we report another interesting experimental observation in a spinel system: relaxor ferroelectricity in ferromagnetic CdCr2S4 and the occurrence of colossal magnetocapacitive effects. ...

J. Hemberger; P. Lunkenheimer; R. Fichtl; H.-A. Krug von Nidda; V. Tsurkan; A. Loidl

2005-03-17T23:59:59.000Z

203

Oxidation resistance of 9-12% Cr steels: effect of rare earth surface treatment  

SciTech Connect

Medium Cr steels have been used in fossil fired power plants for many years because of their excellent high temperature stability and mechanical properties. The environment in a fossil fired power plant is extremely aggressive in terms of corrosion, especially oxidation. This is only accelerated as the operating temperature increases to 650C and beyond. For any new steel to be qualified for power plant use, in addition to adequate strength at the operating temperature, material wastage from all corrosion processes must be kept to a minimum acceptable level. The use of medium Cr steels provides a means to improve overall corrosion resistance. Three medium Cr are under development for use as high temperature power plant steels: 0.08C-(9-12)Cr-1.2Ni-0.7Mo-3.0Cu-3.0Co-0.5Ti. Oxidation tests were performed on the steels for times greater than 1000 hours in order to determine the oxidation kinetics and extent of material wastage. Also, rare earth oxides were incorporated into the outer surface layers of the steels to see if the oxidation resistance could be improved. These results will be compared to current power plant steels.

Dogan, Omer N.; Alman, David A.; Jablonski, Paul D.

2005-02-01T23:59:59.000Z

204

Diode-Pumped Gigahertz Repetition Rate Femtosecond Cr:Lisaf Laser  

E-Print Network (OSTI)

We report a low-cost, 1 GHz repetition-rate, diode-pumped, saturable Bragg reflectors mode-locked Cr:LiSAF laser, which generates nearly transform-limited 103-fs long pulses around 866 nm, with a record high peak power of 1.45 kW.

Li, Duo

205

Microwave-assisted PtCoCr/C ternary compound preparation applied as a cathode catalyst for PEMFC  

Science Journals Connector (OSTI)

The present study describes the preparation of catalyst nanocomposites comprised of 20 wt.% PtCoCr (2:1:1) particles attached on the surface of carbon Vulcan XC-72R by microwave radiation; cases of carbon being chemically treated and untreated are considered. Ethylene glycol was used as the solvent and electron source for the microwave-assisted reduction reaction, whereas H2PtCl6?xH2O, Co(NO3)3?6H2 O and Cr(NO3)3?9H2 O were used as metal precursors. The C powder surface was chemically modified by stirring the C in 8N H2 O2 for 48?h. For the nanocomposite in which C was not treated, EDS analysis showed a content of 4.9 wt.% Pt and 1.2 wt.% Cr with only a trace amount of Co. Higher Pt and Cr contents were observed in the catalyst sample prepared from treated carbon (5.6% Pt and 2.2% Cr), but no Co was detected. Chromium appeared as Cr3 O4 in both samples confirmed by the XAS spectrum. The obtained phase was therefore PtCr3 O4 /C for both samples. The TEM results indicated that the average particle size of PtCr3O4 was 2.22 0.41?nm on treated C and 1.93 0.34?nm on untreated C. By the CV technique, it was observed that the catalytic activity of the treated carbon PtCr3O4 catalyst was not only higher than that of the untreated carbon Pt Cr3 O4 catalyst, but also higher than that of the standard platinum catalyst.

T Sarakonsri; S Thungprasert; W Klysubun; T Vilaithong

2010-01-01T23:59:59.000Z

206

Anharmonicity, mechanical instability, and thermodynamic properties of the Cr-Re -Mauro Palumbo, Suzana G. Fries, Alain Pasturel, and Dario Alf  

E-Print Network (OSTI)

Anharmonicity, mechanical instability, and thermodynamic properties of the Cr-Re - phase Mauro instability, and thermodynamic properties of the Cr-Re -phase Mauro Palumbo,1,a) Suzana G. Fries,1 Alain

Alfè, Dario

207

Effect of Cr-doping on the structural and optical properties of CdS nanoparticles prepared by chemical precipitation method  

Science Journals Connector (OSTI)

Undoped and Cr doped CdS nanoparticles have been prepared by chemical precipitation ... diffraction analysis reveals that the undoped and Cr doped CdS nanoparticles exhibit hexagonal structure and the average ......

M. Thambidurai; N. Muthukumarasamy

2012-02-01T23:59:59.000Z

208

Originally presented at Photomask Japan '94, Kanagawa Science Park, April, 1994 Attenuated phase-shifting photomasks fabricated from Cr-based embedded shifter blanks  

E-Print Network (OSTI)

the cathode powers and gas mixture. Cr-based films' flexible properties are suitable for several applications

Rollins, Andrew M.

209

Ca Isotope Effects in Orgueil Leachates and the Implications for the Carrier Phases of 54Cr Anomalies  

Science Journals Connector (OSTI)

Primitive meteorites contain small 40Ca excesses, in addition to rare anomalies in 48Ca. Refractory inclusions from Vigarano and Allende have larger 40Ca and resolvable 48Ca anomalies. These results imply that Ca isotopic heterogeneities were still present in the early solar system at both the mineral and whole-rock scale. The absence of correlated Ca isotope anomalies in leachates from the CI1 chondrite Orgueil containing large 54Cr anomalies has implications on the origin of the Cr anomalies. 54Cr has to be produced either in massive stars during s-process nucleosynthesis without accompanying 48Ca or in particular zones in the rare Type Ia supernovae. In the latter case, 54Cr has been produced in a zone predominantly enriched in Cr and 54Cr and not mixed with other zones, or 54Cr has been produced together with other neutron-rich nuclides and there has been subsequent decoupling of this material in the star, in the solar system, or in the laboratory.

Frederic Moynier; Justin I. Simon; Frank A. Podosek; Bradley S. Meyer; Joyce Brannon; Donald J. DePaolo

2010-01-01T23:59:59.000Z

210

Preparation of CuAlO2 and CuCrO2 thin films by solgel processing  

Science Journals Connector (OSTI)

CuAlO2 and CuCrO2 thin films were prepared by solgel processing and subsequent thermal treatment in air and inert gas atmosphere. Resistivities of 700? cm and 60? cm with optical transmissions of 65% and 32% were achieved respectively. The crystallization temperature of 700C allows the preparation of CuCrO2 on borosilicate glass. P-type conductivity was verified by Seebeck measurements and a transparent heterostructure including p-CuCrO2 showed rectifying behavior.

Stefan Gtzendrfer; Christina Polenzky; Stephan Ulrich; Peer Lbmann

2009-01-01T23:59:59.000Z

211

Doubly resonant Raman electron paramagnetic transitions of Cr{sup 3+} in ruby (Al{sub 2}O{sub 3}:Cr{sup 3+}).  

SciTech Connect

We report the Raman electron paramagnetic resonance (EPR) of Cr{sup 3+} in ruby (Al{sub 2}O{sub 3}:Cr{sup 3+}) in the {sup 4}A{sub 2} (ground) and E{sup -} (excited) states of its well-known R{sub 1} emission line. Using tunable dye laser excitation within the range of the Zeeman components of R{sub 1}, we observe highly selective doubly resonant enhancements of the Raman EPR lines. The double resonances confirm the assignments of the Raman EPR lines, and they underscore the simultaneous occurrence of both 'in resonance' and 'out resonance' as visualized in the Kramers-Heisenberg quantum-mechanical picture of inelastic light scattering. The g factors of the {sup 4}A{sub 2} and E{sup -} states are consistent with the observed magnetic field dependence of the Raman EPR shifts. Through the interplay of Raman effect and the sharp Zeeman components of R{sub 1}, the results provide clear insights into the underlying microscopic mechanism of these resonant Raman EPR spectra of ruby.

Lu, X.; Venugopalan, S.; Kim, H.; Grimsditch, M.; Rodriguez, S.; Ramdas, A. K.; Materials Science Division; Purdue Univ.; State Univ. of New York at Binghamton; Sogang Univ.

2009-06-01T23:59:59.000Z

212

Laser Welding and Post Weld Treatment of Modified 9Cr-1MoVNb Steel [Laser  

NLE Websites -- All DOE Office Websites (Extended Search)

Laser Welding of Metals > Laser Welding of Metals > Laser Welding and Post Weld Treatment of Modified 9Cr-1MoVNb Steel Capabilities Engineering Experimentation Reactor Safety Experimentation Aerosol Experiments System Components Laser Applications Overview Laser Oil & Gas Well Drilling Laser Heat Treatment Laser Welding of Metals On-line Monitoring Laser Beam Delivery Laser Glazing of Railroad Rails High Power Laser Beam Delivery Decontamination and Decommissioning Refractory Alloy Welding Robots Applications Other Facilities Other Capabilities Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE on Flickr Laser Applications Laboratory Laser Welding of Metals Laser Welding and Post Weld Treatment of Modified 9Cr-1MoVNb Steel Zhiyue Xu Nuclear Engineering Division of Argonne National Laboratory

213

Magnetization switching of rare earth orthochromite CeCrO{sub 3}  

SciTech Connect

We report the synthesis of single phase rare earth orthochromite CeCrO{sub 3} and its magnetic properties. A canted antiferromagnetic transition with thermal hysteresis at T?=?260?K is observed, and a magnetic compensation (zero magnetization) near 133?K is attributed to the antiparallel coupling between Ce{sup 3+} and Cr{sup 3+} moments. At low temperature, field induced magnetization reversal starting from 43?K for H?=?1.2 kOe reveals the spin flip driven by Zeeman energy between the net moments and the applied field. These findings may find potential uses in magnetic switching devices such as nonvolatile magnetic memory which facilitates two distinct states of magnetization.

Cao, Yiming; Cao, Shixun, E-mail: sxcao@shu.edu.cn; Ren, Wei; Feng, Zhenjie; Yuan, Shujuan; Kang, Baojuan; Zhang, Jincang [Department of Physics, Shanghai University, Shanghai 200444 (China); Lu, Bo [Laboratory for Microstructures, Shanghai University, Shanghai 200444 (China)

2014-06-09T23:59:59.000Z

214

Structure of Al-Mn-Cr-Si quasicrystals studied by pulsed neutron scattering  

Science Journals Connector (OSTI)

The atomic structure of rapidly quenched quasicrystals, Al80Mn20, Al75Mn20Si5, and Al75Mn15Cr5Si5, was studied by pulsed neutron scattering. The pair distribution function was obtained by a direct Fourier transformation of the structure factor, and by assuming isomorphous substitution of Cr for Mn the differential distribution function (DDF) was determined. The addition of Si was found to increase the medium-range order significantly. The DDF from Mn atoms indicates the presence of a quasicrystalline substructure which is occupied both by Mn and Al atoms. The atomic structure of these solids, therefore, is significantly different from that of quasicrystalline Pd58.8U20.6Si20.6.

S. Nanao; W. Dmowski; T. Egami; J. W. Richardson; Jr.; J. D. Jorgensen

1987-01-15T23:59:59.000Z

215

Development and characterization of PdCr temperature-compensaated wire resistance strain gage  

SciTech Connect

A temperature-compensated resistance static strain gage with potential to be used to 600 C was recently developed. Gages were fabricated from specially developed palladium-13 w/o chromium (Pd-13Cr) wire and platinum (Pt) compensator. When bonded to high temperature Hastelloy X, the apparent strain from room temperature to 600 C was within 400 microstrain for gages with no preheat treatment and within 3500 microstrain for gages with 16 hours prestabilization at 640 C. The apparent strain versus temperature relationship of stabilized PdCr gages were repeatable with the reproducibility within 100 microstrain during three thermal cycles to 600 C and an 11 hours soak at 600 C. The gage fabrication, construction and installation is described. Also, the coating system used for this compensated resistance strain gage is explained. The electrical properties of the strain sensing element and main characteristics of the compensated gage including apparent strain, drift and reproducibility are discussed.

Lei, J.F.

1989-10-01T23:59:59.000Z

216

Absence of long-range chemical ordering in equimolar FeCoCrNi  

SciTech Connect

Equimolar FeCoCrNi alloys have been the topic of recent research as 'high-entropy alloys,' where the name is derived from the high configurational entropy of mixing for a random solid solution. Despite their name, no systematic study of ordering in this alloy system has been performed to date. Here, we present results from anomalous x-ray scattering and neutron scattering on quenched and annealed samples. An alloy of FeNi{sub 3} was prepared in the same manner to act as a control. Evidence of long-range chemical ordering is clearly observed in the annealed FeNi{sub 3} sample from both experimental techniques. The FeCoCrNi sample given the same heat treatment lacks long-range chemical order.

Lucas, M. S. [Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433 (United States); UTC Inc., 1270 North Fairfield Road, Dayton, Ohio 45432 (United States); Wilks, G. B.; Senkov, O. N. [Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433 (United States); UES, Inc., 4401 Dayton-Xenia Rd., Dayton, Ohio 45432 (United States); Mauger, L.; Munoz, J. A. [California Institute of Technology, W. M. Keck Laboratory 138-78, Pasadena, California 91125 (United States); Michel, E. [Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433 (United States); Wright State University, Dayton, Ohio 45435 (United States); Horwath, J.; Semiatin, S. L. [Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433 (United States); Stone, M. B.; Abernathy, D. L. [Oak Ridge National Laboratory, 1, Bethel Valley Road, Oak Ridge, Tennessee 37831 (United States); Karapetrova, E. [Argonne National Laboratory, Argonne, Illinois 60439 (United States)

2012-06-18T23:59:59.000Z

217

Absence of long-range chemical ordering in equimolar FeCoCrNi  

SciTech Connect

Equimolar FeCoCrNi alloys have been the topic of recent research as high-entropy alloys, where the name is derived from the high configurational entropy of mixing for a random solid solution. Despite their name, no systematic study of ordering in this alloy system has been performed to date. Here we present results from anomalous x-ray scattering and neutron scattering on quenched and annealed samples. An alloy of FeNi3 was prepared in the same manner to act as a control. Evidence of longrange chemical ordering is clearly observed in the annealed FeNi3 sample from both experimental techniques. The FeCoCrNi sample given the same heat treatment lacks long-range chemical order.

Lucas, Matthew [Air Force Research Laboratory, Wright-Patterson AFB, OH; Wilks, G B [Air Force Research Laboratory, Wright-Patterson AFB, OH; Mauger, L [W. M. Keck Laboratory, Pasadena, CA; Munoz, Jorge A. [California Institute of Technology, Pasadena; Senkov, Oleg [ORNL; Michel, E [Air Force Research Laboratory, Wright-Patterson AFB, OH; Horwath, J [Air Force Research Laboratory, Wright-Patterson AFB, OH; Semiatin, S L [Air Force Research Laboratory, Wright-Patterson AFB, OH; Stone, Matthew B [ORNL; Abernathy, Douglas L [ORNL; Karapetrova, Evgenia [University of Illinois, Urbana-Champaign

2012-01-01T23:59:59.000Z

218

Evaluation of the kinetics of Cr-51 methylene diphosphonate: a potential therapeutic radiopharmaceutical for osteogenic sarcoma  

E-Print Network (OSTI)

EVALUATION OF THE KINETICS OF Cr-51 METHYLENE DIPHOSPHONATE: A POTENTIAL THERAPEUTIC RADIOPHARMACEUTICAL FOR OSTEOGENIC SARCOMA A Thesis by BRIAN ALLEN POTEET Submitted to the Graduate College of Texas A8cM University in partial fulfillment... by BRIAN ALLEN POTEET Approved as to style and content by: Dan Hig tower (Chairman of Commitee) ) d~& L~a- "tr J. D. McCrady (Department Head) i'', . James G. Anderson (Member) E. L. Morris (Member) May 1987 ABSTRACT Evaluation of the Kinetics...

Poteet, Brian Allen

2012-06-07T23:59:59.000Z

219

Magneto-Optical Effects in the Paramagnetic and Ferromagnetic Phases of CrBr3  

Science Journals Connector (OSTI)

We report new measurements of thermoreflectance spectra of CrBr3 in the paramagnetic and ferromagnetic phases in the 2.5-4 eV region. The spectra obtained with use of unpolarized and circularly polarized light, with and without external magnetic field, allow one to identify the dominating modulation mechanisms: electron-phonon interaction modulation (shift and broadening effects) in the paramagnetic phase, and exchange interaction modulation (splitting effects) in the ferromagnetic phase.

A. Borghesi; G. Guizzetti; G. Samoggia; E. Reguzzoni

1981-08-17T23:59:59.000Z

220

Rolling contact fatigue in martensitic 100Cr6: Subsurface hardening and crack formation  

E-Print Network (OSTI)

, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS bDepartment of Lubrication and Metallic Materials, SKF Engineering and Research Centre, Kelvinbaan 16, 3439 MT Nieuwegein, The Netherlands. Abstract Rolling contact fatigue tests on 100Cr6... ground to the deformed region. The unaffected area was cut into a thin plate with a rectangular section. The sectioned parts were cold- mounted, mechanically ground with silicon carbide papers, polished with 6 m, 1 m diamond suspensions, and final...

Kang, Jee-Hyun; Vegter, R. H.; Rivera-Daz-del-Castillo, Pedro E. J.

2014-04-13T23:59:59.000Z

Note: This page contains sample records for the topic "ire cr eek" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Three-dimensional reconstruction of the -AlCrFe phase by electron crystallography  

Science Journals Connector (OSTI)

The three-dimensional structure of the huge quasicrystal approximant -AlFeCr was solved by electron crystallography, using high-resolution transmission-electron-microscopy (HREM) images and selected-area electron diffraction patterns from 13 different zone axes. This is the first example of an inorganic structure with over 100 unique atoms being solved to atomic resolution by electron crystallography.

Zou, X.D.

2003-10-28T23:59:59.000Z

222

An improved Cr{sub 3}C{sub 2}-NICHROME powder  

SciTech Connect

The need for cost effective, wear resistance and corrosion resistant coatings is omnipresent in the oil and gas or petrochemically-related industries. In general, WC-Co powder mixtures are specified but, for the environments of elevated temperature and severe corrosion service, engineers prefer mixtures which contain an (X) amount of chromium carbide dispersed in a matrix of (1-X) NICHROME. Within this singular class of Cr{sub 3}-C{sub 2}-type coatings, a typical choice involves 75% Cr{sub 3}C{sub 2}-25% [80Ni-20Cr]. However, the actual NICHROME composition varies with different blends that range from 10-to-25%. Currently available powders also exhibit a wide variability because of the many different manufacturing methods that are applied. This paper maintains that, if the matrix alloy composition is properly varied and, if the associated chromium carbide content is correctly adjusted, improved results are obtained. For example, erosion resistance is comparable to that for a WC-Co mixture and a uniform microstructure reveals no apparent oxide stringers. Powder is prepared by sintering/crushing to proper size with low iron contents as the end result. Flame spraying has been successful using these spray guns: JET-KOTE II, HV-2000 or GATOR-GARD.

Hays, C. [Hays Metallurgical Engineering Corp., Pearland, TX (United States); Douglas, R.; Sokol, L.S. [Miller Thermal Inc., Baytown, TX (United States)

1994-12-31T23:59:59.000Z

223

Microstructural refinement and strengthening of Cu-4 Cr-2 Nb alloy by mechanical milling  

SciTech Connect

Lately, a variety of dispersion strengthened (DS) copper alloys that provide a good combination of thermal/electrical conductivity and mechanical strength have been developed. Strengthening is usually achieved by the introduction of a ceramic, refractory metal or intermetallic secondary phase. Cu-Cr-Nb is one such DS alloy in which strengthening is provided by Cr{sub 2}Nb intermetallic particles. Mechanical milling of as-atomized Cu-4 Cr-2 Nb alloy powders substantially increases the mechanical strength (hardness) of the starting material. This is achieved through a drastic grain size, as well as large precipitate size refinement. A more uniform precipitate distribution is also attained. Whether milling is performed with steel or WC vial and balls the hardness saturates at approximately 100 HRB after about 4 hr milling. However, this benefit of MM was offset by an equally severe decrease in electrical conductivity. This decrease is attributed to impurities/contamination from the milling media introduced into the milled powder, primarily, Fe and C, or, WC and Co.

Anderson, K.R.; Groza, J.R. [Univ. of California, Davis, CA (United States). Dept. of Chemical Engineering and Materials Science] [Univ. of California, Davis, CA (United States). Dept. of Chemical Engineering and Materials Science; Ulmer, D.G. [Rockwell International, Canoga Park, CA (United States). Rocketdyne Div.] [Rockwell International, Canoga Park, CA (United States). Rocketdyne Div.

1997-07-15T23:59:59.000Z

224

Microbial community changes during sustained Cr(VI) reduction at the 100H site in Hanford, WA  

E-Print Network (OSTI)

at the 100H site in Hanford, WA Romy Chakraborty 1 , Eoin Lcontaminated aquifer at the Hanford (WA) 100H site in 2004.Cr(VI) reduction at Hanford, and a comparison of the

Chakraborty, Romy

2010-01-01T23:59:59.000Z

225

In situ long-term reductive bioimmobilization of Cr(VI) in groundwater using hydrogen release compound  

E-Print Network (OSTI)

100 H Area of the DOE Hanford Facility, Quantum EngineeringCr-immobilization research site at Hanford 100-H area. Wellexperiment was conducted at the Hanford Site (Washington), a

Faybishenko, B.

2009-01-01T23:59:59.000Z

226

Raman Spectroscopic and Visible Absorption Investigation of LiCrSi2O6 Pyroxene Under Pressure  

E-Print Network (OSTI)

symmetry.6,7 Spodumene (LiAlSi2O6) and LiCrSi2O6 behave similarly at the phase transition; both go from 6

Downs, Robert T.

227

Neutron Energy Response and Background of Electrochemically Etched Nuclear Track Detectors: Study of Various CR-39 Materials  

Science Journals Connector (OSTI)

......Radiation Protection Dosimetry Article Neutron Energy Response and Background of Electrochemically Etched Nuclear Track Detectors: Study of Various CR-39...experiments. Results are presented for the energy dependence of the response of the various......

M. Luszik-Bhadra; W.G. Alberts; E. Piesch

1990-08-01T23:59:59.000Z

228

Zn(II)Cr(III) mixed oxide as efficient bifunctional catalyst for dehydroisomerisation of ?-pinene to p-cymene  

Science Journals Connector (OSTI)

Zn(II)Cr(III) mixed oxide possessing acid and dehydrogenation functions is an efficient, noble-metal-free catalyst for the one-step dehydroisomerisation of ?-pinene to p-cymene. This reaction is a good example of the use of heterogeneous multifunctional catalysis for the conversion of renewable feedstock into value-added chemicals. It involves acid-catalysed ?-pinene isomerisation followed by dehydrogenation of p-cymene precursor(s). The reaction is carried out over a fixed catalyst bed in the gas phase at 350C. Amongst ZnCr oxides studied (Zn/Cr=20:11:30), the preferred catalyst is ZnCr (1:1) oxide which produces p-cymene with a 78% yield at 100% ?-pinene conversion. This catalyst shows stable performance for over 30h without co-feeding hydrogen to the reactor.

Fahd Al-Wadaani; Elena F. Kozhevnikova; Ivan V. Kozhevnikov

2009-01-01T23:59:59.000Z

229

Electronic band alignment and electron transport in Cr/BaTiO{sub 3}/Pt ferroelectric tunnel junctions  

SciTech Connect

Electroresistance in ferroelectric tunnel junctions is controlled by changes in the electrostatic potential profile across the junction upon polarization reversal of the ultrathin ferroelectric barrier layer. Here, hard X-ray photoemission spectroscopy is used to reconstruct the electric potential barrier profile in as-grown Cr/BaTiO{sub 3}(001)/Pt(001) heterostructures. Transport properties of Cr/BaTiO{sub 3}/Pt junctions with a sub-{mu}m Cr top electrode are interpreted in terms of tunneling electroresistance with resistance changes of a factor of {approx}30 upon polarization reversal. By fitting the I-V characteristics with the model employing an experimentally determined electric potential barrier we derive the step height changes at the BaTiO{sub 3}/Pt (Cr/BaTiO{sub 3}) interface +0.42(-0.03) eV following downward to upward polarization reversal.

Zenkevich, A. [NRNU 'Moscow Engineering Physics Institute,' 115409 Moscow (Russian Federation) [NRNU 'Moscow Engineering Physics Institute,' 115409 Moscow (Russian Federation); Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region (Russian Federation); Minnekaev, M.; Matveyev, Yu.; Lebedinskii, Yu. [NRNU 'Moscow Engineering Physics Institute,' 115409 Moscow (Russian Federation)] [NRNU 'Moscow Engineering Physics Institute,' 115409 Moscow (Russian Federation); Bulakh, K.; Chouprik, A.; Baturin, A. [Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region (Russian Federation)] [Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region (Russian Federation); Maksimova, K. [Immanuel Kant Baltic Federal University, 236041 Kaliningrad (Russian Federation)] [Immanuel Kant Baltic Federal University, 236041 Kaliningrad (Russian Federation); Thiess, S.; Drube, W. [Deutsches Elektronen-Synchrotron DESY, D-22603 Hamburg (Germany)] [Deutsches Elektronen-Synchrotron DESY, D-22603 Hamburg (Germany)

2013-02-11T23:59:59.000Z

230

Structure of multilayered Cr(Al)N/SiO{sub x} nanocomposite coatings fabricated by differential pumping co-sputtering  

SciTech Connect

A Cr(Al)N/38 vol. % SiO{sub x} hard coating was prepared on a (001) Si substrate at 250 C in a differential pumping co-sputtering system, which has two chambers for radio frequency (RF) sputtering and a substrate holder rotating on the chambers. The composite coating was grown by alternate sputter-depositions from CrAl and SiO{sub 2} targets with flows of N{sub 2}+Ar and Ar at RF powers of 200 and 75 W, respectively, on transition layers grown on the substrate. Analytical electron microscopy reveled that the Cr(Al)N/SiO{sub x} coating had a multilayered structure of Cr(Al)N crystal layers ?1.6 nm thick and two-dimensionally dispersed amorphous silicon oxide (a-SiO{sub x}) particles with sizes of ?1 nm or less. The a-SiO{sub x} particles were enclosed with the Cr(Al)N layers. The coating had a low indentation hardness of ?25 GPa at room temperature, due to a high oxide fraction of 38 vol. % and a low substrate rotational speed of 1 rpm. Faster rotation and lower oxide fraction would make a-SiO{sub x} particles smaller, resulting in the formation of Cr(Al)N crystal including the very fine a-SiO{sub x} particles with small number density. They would work as obstacles for the lattice deformation of the Cr(Al)N crystals. We have fabricated a superhard coating of Cr(Al)N/17 vol. % SiO{sub x} with a hardness of 46 GPa prepared at 12 rpm.

Kawasaki, Masahiro [JEOL USA Inc., 11 Dearborn Road, Peabody, Massachusetts 01960 (United States)] [JEOL USA Inc., 11 Dearborn Road, Peabody, Massachusetts 01960 (United States); Nose, Masateru [Faculty of Art and Design, University of Toyama, 180 Futagami-machi, Takaoka 933-8588 (Japan)] [Faculty of Art and Design, University of Toyama, 180 Futagami-machi, Takaoka 933-8588 (Japan); Onishi, Ichiro [JEOL Ltd. 3-1-2 Musashino, Akishima, Tokyo 196-8558 (Japan)] [JEOL Ltd. 3-1-2 Musashino, Akishima, Tokyo 196-8558 (Japan); Shiojiri, Makoto [Kyoto Institute of Technology, Kyoto 606-8585 (Japan)] [Kyoto Institute of Technology, Kyoto 606-8585 (Japan)

2013-11-11T23:59:59.000Z

231

Developing Bi-CG and Bi-CR methods to solve generalized Sylvester-transpose matrix equations  

Science Journals Connector (OSTI)

The bi-conjugate gradients (Bi-CG) and bi-conjugate residual (Bi-CR) methods are powerful tools for solving nonsymmetric linear systems Ax = b. By using Kronecker product and vectorization operator, this paper develops the Bi-CG and ... Keywords: Linear systems, bi-conjugate gradients (Bi-CG) method, bi-conjugate residual (Bi-CR) method, Sylvester matrix equation, iterative method

Masoud Hajarian

2014-02-01T23:59:59.000Z

232

Cr-W-V bainitic/ferritic steel with improved strength and toughness and method of making  

DOE Patents (OSTI)

A high strength, high toughness Cr-W-V ferritic steel composition suitable for fast induced-radioactivity (FIRD) decay after irradiation in a fusion reactor comprises 2.5-3.5 wt % Cr, 2. This invention was made with Government support under contract DE-AC05-840R21400 awarded by the U.S. Department of Energy to Martin Marietta Energy Systems, Inc. and the Government has certain rights in this invention.

Klueh, Ronald L. (Knoxville, TN); Maziasz, Philip J. (Oak Ridge, TN)

1994-01-01T23:59:59.000Z

233

Bringing part of the lab to the field: On-site chromium speciation in seawater by electrodeposition of Cr(III)/Cr(VI) on portable coiled-filament assemblies and measurement in the lab by electrothermal, near-torch vaporization sample introduction and inductively coupled plasma-atomic emission spectrometry  

Science Journals Connector (OSTI)

A field-deployable electrochemical approach to preconcentration, matrix clean up and selective electrodeposition of Cr(III) and Cr(III)+Cr(VI) in seawater is described. Using portable, battery-operated electrochemical instrumentation, Cr species in seawater were electrodeposited in the field on portable coiled-filament assemblies made from Re. Assemblies with dried residues of Cr(III) or Cr(III)+Cr(VI) on them were transported to the lab for concentration determination by electrothermal, near-torch vaporization (NTV) sample introduction and inductively coupled plasma-atomic emission spectrometry (ICP-AES). Electrodeposition offers selective species deposition, preconcentration and matrix clean up from seawater samples. For selective deposition, free Cr(VI) was electrodeposited at ?0.3V and Cr(III)+Cr(VI) at ?1.6V (both vs Ag/AgCl). Interestingly, at 0V (vs Ag/AgCl) and in the absence of an electrodeposition potential only Cr(VI) was spontaneously and selectively adsorbed on the coil and reasons for this are given. Due to preconcentration afforded by electrodeposition, the detection limits obtained after a 60s electrodeposition at the voltages stated above using buffered (pH=4.7) artificial seawater spiked with either Cr(III) or Cr(VI) were 20pg/mL for Cr(III) and 10pg/mL for Cr(VI). For comparison, the detection limit for Cr obtained by pipetting directly on the coil 5?L of diluted standard solution was 500pg/mL, thus it was concluded that electrodeposition offered 40 to 60 fold improvements. Matrix clean up is required due to the high salt content of seawater and this was addressed by simply rinsing the coil with 18.2M? water without any loss of Cr species. Reasons for this are provided. The method was validated in the lab using buffered artificial seawater and it was used in the field for the first time by sampling seawater, buffering it and immediately electrodepositing Cr species on portable assemblies on-site. Electrodeposition in the field addressed species transformation during sample pre-treatment. Such transformations occur due to sample acidification and may take place during transport and possibly storage prior to analysis. Thus, electrodeposition in the field is more reflective of Cr species concentration at the environmental conditions (e.g., temperature) at the time of sampling. It also opens up the possibility for shipping to the lab portable assemblies with Cr species on them rather than shipping large volumes of sample to the lab, thus also reducing shipping, handling and storage costs.

Hamid R. Badiei; Jennifer McEnaney; Vassili Karanassios

2012-01-01T23:59:59.000Z

234

Effects of Partial Phase Transformation on Characteristics of 9Cr Nanostructured Ferritic Alloy  

SciTech Connect

The core structures of future nuclear systems require tolerance to extreme irradiation, and some critical components, for example, the fuel cladding in Sodium-cooled Fast Reactors (SFRs), have to maintain mechanical integrity to very high doses of 200 -400 dpa at high temperatures up to 700 degrees C. The high Cr nanostructured ferritic alloys (NFAs) are under intense research worldwide as a candidate core material. Although the NFAs have some admirable characteristics for high-temperature applications, their crack sensitivity is very high at high temperatures. The fracture toughness of high strength NFAs is unacceptably low above 300 degrees C. The objective of this study is to develop processes and microstructures with improved high temperature fracture toughness and ductility. To optimize the afterextrusion heat treatment condition, both the computational simulation technique on phase equilibrium and the basic microstructural and mechanical characterization have been carried out. 9 Cr-NFA was produced by the mechanical alloying of pre-alloyed Fe-9Cr base metallic powder and yttria particles, and subsequent extrusion. The post-extrusion heat-treatments of various conditions were applied to the asextruded NFA. The tensile and fracture toughness tests were conducted for as-extruded and heat-treated samples at up to 700 degrees C. Fracture toughness of the NFA has increased by more than 40% at every testing temperature after heat-treatment in the inter-critical temperature range. The increment of fracture toughness of the NFA after post-extrusion heat-treatment is attributed to the increased strength at below 500 degrees C, and an increased ductility at 700 degrees C.

Ji Hyun, Yoon [Korea Atomic Energy Research Institute] [Korea Atomic Energy Research Institute; Byun, Thak Sang [ORNL] [ORNL; Hoelzer, David T [ORNL] [ORNL

2014-01-01T23:59:59.000Z

235

Letter Report Documenting Progress of Second Generation ATF FeCrAl Alloy Fabrication  

SciTech Connect

Development of the 2nd generation ATF FeCrAl alloy has been initiated, and a candidate alloy was selected for trial tube fabrication through hot-extrusion and gun-drilling processes. Four alloys based on Fe-13Cr-4.5Al-0.15Y in weight percent were newly cast with minor alloying additions of Mo, Si, Nb, and C to promote solid-solution and second-phase precipitate strengthening. The alloy compositions were selected with guidance from computational thermodynamic tools. The lab-scale heats of ~ 600g were arc-melted and drop-cast, homogenized, hot-forged and -rolled, and then annealed producing plate shape samples. An alloy with Mo and Nb additions (C35MN) processed at 800C exhibits very fine sub-grain structure with the sub-grain size of 1-3?m which exhibited more than 25% better yield and tensile strengths together with decent ductility compared to the other FeCrAl alloys at room temperature. It was found that the Nb addition was key to improving thermal stability of the fine sub-grain structure. Optimally, grains of less than 30 microns are desired, with grains up to and order of magnitude in desired produced through Nb addition. Scale-up effort of the C35MN alloy was made in collaboration with a commercial cast company who has a capability of vacuum induction melting. A 39lb columnar ingot with ~81mm diameter and ~305mm height (with hot-top) was commercially cast, homogenized, hot-extruded, and annealed providing 10mm-diameter bar-shape samples with the fine sub-grain structure. This commercial heat proved consistent with materials produced at ORNL at the lab-scale. Tubes and end caps were machined from the bar sample and provided to another work package for the ATF-1 irradiation campaign in the milestone M3FT-14OR0202251.

Yamamoto,, Y. [ORNL] [ORNL; Yang, Y. [ORNL] [ORNL; Field, K. G. [ORNL] [ORNL; Terrani, K. [ORNL] [ORNL; Pint, B. A. [ORNL] [ORNL; Snead, L. L. [ORNL] [ORNL

2014-06-10T23:59:59.000Z

236

Determination of mechanical properties of Ni-Cr-P amorphous alloys  

E-Print Network (OSTI)

DETERMINATION OF MECHANICAL PROPERTIES OF Ni-Cr-P AMORPHOUS ALLOYS A Thesis by SWAROOP KUMAR R. KONDLAPUDI Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree.... Kondlapudi, B. E. , Qsmania University Co-Chairs of Advisory Committee : Dr. A. wolfenden Dr. R. Griffin A study of the mechanical properties of Ni80 xCrxPgp amorphous alloys (x = 0 to 40 at% in steps of 5. 0) has been undertaken at Texas A&M University...

Kondlapudi, Swaroop Kumar R

2012-06-07T23:59:59.000Z

237

A TEM study of inverse melting in Nb{sub 45}Cr{sub 55}  

SciTech Connect

Inverse melting of bcc Nb{sub 45}Cr{sub 55} is investigated using transmission electron microscopy, high-resolution TEM and electron diffraction. It is shown that the transformation to the amorphous phase initiates at the bcc grain boundaries. The transformation results in an increase in incoherence, evidenced by a loss of bend contours. Some anisotropy is found in the amorphous phase produced by inverse melting, which is associated in HRTEM with preferentially oriented but discontinuous and distorted fringes. The results are consistent with the production of an amorphous phase by inverse melting.

Sinkler, W.; Michaelsen, C.; Bormann, R. [GKSS Forschungszentrum, Geesthacht (Germany). Inst. for Materials Research

1996-12-31T23:59:59.000Z

238

High-spin gamma spectroscopy of recoil-separated Cr49, V49, and Ti46  

Science Journals Connector (OSTI)

The reaction Ca40+12C at ECa=160 MeV has been used to study high-spin states in the recoil-separated nuclides Cr49, V49, and Ti46. The latter two show distinctive f7/2 shell-model behavior up to J?=27/2- and 12+, respectively, while the first appears to be a collective rotor with a particle alignment at J?=17/2-. Rotorlike bands of sd-shell origin were seen in V49 and Ti46 up to J?=11/2+ and 11-, respectively.

J. A. Cameron, M. A. Bentley, A. M. Bruce, R. A. Cunningham, W. Gelletly, H. G. Price, J. Simpson, D. D. Warner, and A. N. James

1991-11-01T23:59:59.000Z

239

Kondo Effect in an Amorphous Ni41Pd41B18 Alloy Containing Cr  

Science Journals Connector (OSTI)

The results of electrical-resistivity-vs-temperature measurements on an amorphous Ni41 Pd41 B18 alloy containing up to 4-at.% Cr exhibits the characteristics of a Kondo system. The experimental data are used to make a comparison between the Kondo theory and the Hamann theory. It is found that both theories agree very well on the slope of logarithmic temperature dependence of the s-d resistivity. In terms of a universal resistivity curve, the Hamann theory comes to closer agreement with the experimental data in a wider temperature range than does the Kondo theory.

V. K. C. Liang and C. C. Tsuei

1973-04-01T23:59:59.000Z

240

Permeable Reactive Biobarriers for In Situ Cr(VI) Reduction: Bench Scale Tests Using Cellulomonas sp. Strain ES6  

SciTech Connect

Chromate (Cr(VI)) reduction studies were performed in bench scale flow columns using the fermentative subsurface isolate Cellulomonas sp. strain ES6. In these tests, columns packed with either quartz sand or hydrous ferric oxide (HFO)-coated quartz sand, were inoculated with strain ES6 and fed nutrients to stimulate growth before nutrient-free Cr(VI) solutions were injected. Results show that in columns containing quartz sand, a continuous inflow of 2 mg/L Cr(VI) was reduced to below detection limits in the effluent for durations of up to 5.7 residence times after nutrient injection was discontinued proving the ability of strain ES6 to reduce chromate in the absence of an external electron donor. In the HFO-containing columns, Cr(VI) reduction was significantly prolonged and effluent Cr(VI) concentrations remained below detectable levels for periods of up to 66 residence times after nutrient injection was discontinued. Fe was detected in the effluent of the HFO-containing columns throughout the period of Cr(VI) removal indicating that the insoluble Fe(III) bearing solids were being continuously reduced to form soluble Fe(II) resulting in prolonged abiotic Cr(VI) reduction. Thus, growth of Cellulomonas within the soil columns resulted in formation of permeable reactive barriers that could reduce Cr(VI) and Fe(III) for extended periods even in the absence of external electron donors. Other bioremediation systems employing Fe(II)-mediated reactions require a continuous presence of external nutrients to regenerate Fe(II). After depletion of nutrients, contaminant removal within these systems occurs by reaction with surface-associated Fe(II) that can rapidly become inaccessible due to formation of crystalline Fe-minerals or other precipitates. The ability of fermentative organisms like Cellulomonas to reduce metals without continuous nutrient supply in the subsurface offers a viable and economical alternative technology for in situ remediation of Cr(VI)-contaminated groundwater through formation of permeable reactive biobarriers (PRBB).

Sridhar Viamajala; Brent M. Peyton; Robin Gerlach; Vaideeswaran; William A. Apel; James N. Petersen

2008-12-01T23:59:59.000Z

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241

Corrosion property of 9Cr-ODS steel in nitric acid solution for spent nuclear fuel reprocessing  

SciTech Connect

Corrosion tests of oxide dispersion strengthened with 9% Cr (9Cr-ODS) steel, which is one of the desirable materials for cladding tube of sodium-cooled fast reactors, in pure nitric acid solution, spent FBR fuel solution, and its simulated solution were performed to understand the corrosion behavior in a spent nuclear fuel reprocessing. In this study, the 9Cr-ODS steel with lower effective chromium content was evaluated to understand the corrosion behavior conservatively. As results, the tube-type specimens of the 9Cr-ODS steels suffered severe weight loss owing to active dissolution at the beginning of the immersion test in pure nitric acid solution in the range from 1 to 3.5 M. In contrast, the weight loss was decreased and they showed a stable corrosion in the higher nitric acid concentration, the dissolved FBR fuel solution, and its simulated solution by passivation. The corrosion rates of the 9Cr-ODS steel in the dissolved FBR fuel solution and its simulated solution were 1-2 mm/y and showed good agreement with each other. The passivation was caused by the shift of corrosion potential to noble side owing to increase in nitric acid concentration or oxidative ions in the dissolved FBR fuel solution and the simulated spent fuel solution. (authors)

Takeuchi, M.; Koizumi, T. [Japan Atomic Energy Agency, Tokai-mura, Naka-gun, Ibaraki 319-1195 (Japan); Inoue, M.; Koyama, S.I. [Japan Atomic Energy Agency, Oarai-machi, Higashi-ibaraki-gun, Ibaraki 311-1393 (Japan)

2013-07-01T23:59:59.000Z

242

Oxidation Resistant, Cr Retaining, Electrically Conductive Coatings on Metallic Alloys for SOFC Interconnects  

SciTech Connect

This report describes significant results from an on-going, collaborative effort to enable the use of inexpensive metallic alloys as interconnects in planar solid oxide fuel cells (SOFCs) through the use of advanced coating technologies. Arcomac Surface Engineering, LLC, under the leadership of Dr. Vladimir Gorokhovsky, is investigating filtered-arc and filtered-arc plasma-assisted hybrid coating deposition technologies to promote oxidation resistance, eliminate Cr volatility, and stabilize the electrical conductivity of both standard and specialty steel alloys of interest for SOFC metallic interconnect (IC) applications. Arcomac has successfully developed technologies and processes to deposit coatings with excellent adhesion, which have demonstrated a substantial increase in high temperature oxidation resistance, stabilization of low Area Specific Resistance values and significantly decrease Cr volatility. An extensive matrix of deposition processes, coating compositions and architectures was evaluated. Technical performance of coated and uncoated sample coupons during exposures to SOFC interconnect-relevant conditions is discussed, and promising future directions are considered. Cost analyses have been prepared based on assessment of plasma processing parameters, which demonstrate the feasibility of the proposed surface engineering process for SOFC metallic IC applications.

Vladimir Gorokhovsky

2008-03-31T23:59:59.000Z

243

Electrically insulating films deposited on V-4%Cr-4%Ti by reactive CVD  

SciTech Connect

In the design of liquid-metal blankets for magnetic fusion reactors, corrosion resistance of structural materials and the magnetohydrodynamic forces and their influence on thermal hydraulics and corrosion are major concerns. Electrically insulating CaO films deposited on V-4%Cr-4%Ti exhibit high-ohmic insulator behavior even though a small amount of vanadium from the alloy become incorporated into the film. However, when vanadium concentration in the film is > 15 wt.%, the film becomes conductive. When the vanadium concentration is high in localized areas, a calcium vanadate phase that exhibits semiconductor behavior can form. The objective of this study is to evaluate electrically insulating films that were deposited on V-4%Cr-4%Ti by a reactive chemical vapor deposition (CVD) method. To this end, CaO and Ca-V-O coatings were produced on vanadium alloys by CVD and by a metallic-vapor process to investigate the electrical resistance of the coatings. The authors found that the Ca-V-O films exhibited insulator behavior when the ratio of calcium concentration to vanadium concentration R in the film > 0.9, and semiconductor or conductor behavior when R < 0.8. However, in some cases, semiconductor behavior was observed when CaO-coated samples with R > 0.98 were exposed in liquid lithium. Based on these studies, they conclude that semiconductor behavior occurs if a conductive calcium vanadate phase is present in localized regions in the CaO coating.

Park, J.H.

1998-04-01T23:59:59.000Z

244

Clinch River - Environmental Restoration Program (CR-ERP) study, Ambient water toxicity  

SciTech Connect

Clinch River - Environmental Restoration Program (CR-ERP) personnel and Tennessee Valley Authority (TVA) personnel conducted a study during the week of January 25-February 1, 1994, as described in the Statement of Work (SOW) document. The organisms specified for testing were larval fathead minnows, Pimephales promelas, and the daphnid, Ceriodaphnia dubia. Surface water samples were collected by TVA Field Engineering personnel from Clinch River Mile 9.0, Poplar Creek Mile 1.0, and Poplar Creek Mile 2.9 on January 24, 26, and 28. Samples were partitioned (split) and provided to the CR-ERP and TVA toxicology laboratories for testing. Exposure of test organisms to these samples resulted in no toxicity (survival or growth) to fathead minnows; however, toxicity to daphnids (significantly reduced reproduction) was demonstrated in undiluted samples from Poplar Creek Mile 1.0 in testing conducted by TVA based on hypothesis testing of data. Point estimation (IC{sub 25}) analysis of the data, however, showed no toxicity in PCM 1.0 samples.

Simbeck, D.J.

1997-06-01T23:59:59.000Z

245

Localized Corrosion of a Neutron Absorbing Ni-Cr-Mo-Gd Alloy  

SciTech Connect

The National Spent Nuclear Fuel Program, located at the Idaho National Laboratory (INL), has developed a new nickel-chromium-molybdenum-gadolinium structural alloy for storage and long-term disposal of spent nuclear fuel (SNF). The new alloy will be used for SNF storage container inserts for nuclear criticality control. Gadolinium has been chosen as the neutron absorption alloying element due to its high thermal neutron absorption cross section. This alloy must be resistant to localized corrosion when exposed to postulated Yucca Mountain in-package chemistries. The corrosion resistance properties of three experimental heats of this alloy are presented. The alloys performance are be compared to Alloy 22 and borated stainless steel. The results show that initially the new Ni-Cr-Mo-Gd alloy is less resistant to corrosion as compared to another Ni-Cr-Mo-Gd alloy (Alloy 22); but when the secondary phase that contains gadolinium (gadolinide) is dissolved, the alloy surface becomes passive. The focus of this work is to qualify these gadolinium containing materials for ASME code qualification and acceptance in the Yucca Mountain Repository.

R.E. Mizia; T. E. Lister; P. J. Pinhero; T. L. Trowbridge

2005-04-01T23:59:59.000Z

246

Ultrahigh-pressure structural phase transitions in Cr, Mo, and W  

Science Journals Connector (OSTI)

On the basis of first-principles total-energy calculations, we predict the ultrahigh-pressure destabilization of the bcc structure in the group-VIB elements Cr, Mo, and W through a bcc?hcp phase transition at pressures of about 7.0, 4.2, and 12.5 Mbar, respectively. In Mo and W, a subsequent hcp?fcc transition is also predicted at about 6.2 and 14.4 Mbar, respectively. The overall driving mechanism for these transitions is a continuous sp?d transfer of electrons upon compression, although other factors play an important quantitative role, especially the hard-core-like interaction between the large cores of these elements, which disfavors the bcc structure and serves to lower the bcc?hcp transition pressures. While the actual predicted transition pressures are sensitive to the details of the calculations, the qualitative trends are not, and the bcc?hcp transition in Mo should be within reach of static diamond-anvil-cell experiments. In this regard, we have also calculated accurate 300-K isotherms for bcc Cr, Mo, and W valid up to the 56-Mbar pressure range.

John A. Moriarty

1992-02-01T23:59:59.000Z

247

Ab initio study on noncompensated CrO codoping of GaN for enhanced solar energy conversion  

SciTech Connect

We describe a novel photocatalyst obtained by codoping GaN with CrO, according to a new "noncompensated" codoping concept based on first-principles calculations. The approach enables controllable narrowing of the GaN band gap with significantly enhanced carrier mobility and photocatalytic activity in the visible light region and thus offers immense potential for application in solar energy conversion, water splitting, and a variety of solar-assisted photocatalysis. Our calculations indicate that the formation energy for the cation doping is greatly reduced by noncompensated codoping with an anion. Although Cr doping alone can split the band gap with the formation of an intermediate band, the mobility is low due to carrier trapping by the localized states. The first-principles calculations also demonstrate that CrO codoping of GaN shifts the Fermi level into the conduction band resulting in high carrier density and mobility.

Pan, Hui [ORNL; Gu, Baohua [ORNL; Eres, Gyula [ORNL; Zhang, Zhenyu [ORNL

2010-03-01T23:59:59.000Z

248

Core/shell structures of oxygen-rich nanofeatures in oxide-dispersion strengthened Fe-Cr alloys  

SciTech Connect

With the significant improvement in high temperature creep properties and resistance to radiation damage by addition of nanoscale oxide features, oxide-dispersion strengthened (ODS) ferritic/martensitic alloys are potential candidates for structural applications in nuclear fusion reactors. The structure of the oxygen-rich nanofeatures was analyzed by atom-probe tomography in three ODS alloys: MA957, ODS Fe-12 wt %Cr, and ODS Eurofer-97. Although field evaporation and reconstruction of the precipitates suffer from artefacts, a core/shell structure is found even for very small precipitates. Precipitate cores are Y rich while shell regions are enriched in Ti, Cr, or V depending on alloy composition.

Marquis, Emmanuelle A. [Department of Materials, University of Oxford, Oxford OX1 3PH (United Kingdom)

2008-11-03T23:59:59.000Z

249

Silicon`s role in determining swelling in neutron-irradiated Fe-Cr-Ni-Si alloys  

SciTech Connect

Two silicon-modified alloy series, one based on Fe-15Cr-20Ni and another based on Fe-15Cr-25Ni were irradiated at target temperatures between 399 and 649{degree}C in EBR-II. The influence of silicon on swelling is more complex than previously envisioned and indicates that silicon plays two or more competing roles while in solution. Radiation-induced formation of {gamma}{prime} (Ni{sub 3}Si) precipitates is dependent on silicon and nickel content, as well as temperature. Precipitation of {gamma}{prime} appears to play only a minor role in void formation.

Sekimura, N. [Tokyo Univ., Tokai, Ibaraki (Japan); Garner, F. A. [Pacific Northwest Lab., Richland, WA (United States); Newkirk, J.W. [Missouri Univ., Rolla, MO (United States)

1991-11-01T23:59:59.000Z

250

Temperature dependence of dynamic Young's modulus and internal friction in three plasma sprayed NiCrAlY coating alloys  

E-Print Network (OSTI)

TEMPERATURE DEPENDENCE OF DYNAM'IIC YOUNG'S MODULUS AND INTERNAL FRICTION IN THREE PLASMA SPRAYED NiCrAlY COATING -ALLOYS A Thesis LLOYD STEVEN COOK Submitted to the 08ice of Graduate Studies of Texas AE M University in part. al full...'illment of the requirement for the degree of MASTER OF SCIENCE August 1989 Itiajor Subject: l'dechanical Engineering TEMPERATURE DEPENDENCE OF DYNAMIC YOUNG'S MODULUS AND INTERNAL FRICTION IN THREE PLASMA SPRAYED NiCrAIY COATING ALLOYS A Thesis by LLOYD STEVEN COOK...

Cook, Lloyd Steven

1989-01-01T23:59:59.000Z

251

Can one identify the intrinsic structure of the yrast states in {sup 48}Cr after the backbending?  

SciTech Connect

The backbending phenomenon in {sup 48}Cr has been investigated using the recently developed projected configuration interaction (PCI) method, in which the deformed intrinsic states are directly associated with shell model wave functions. Two previous explanations, (i) K=0 band crossing and (ii) K=2 band crossing, have been reinvestigated using PCI, and it was found that both explanations can successfully reproduce the experimental backbending. The PCI wave functions in the pictures of K=0 band crossing and K=2 band crossing are highly overlapped. We conclude that there are no unique intrinsic states associated with the yrast states after backbending in {sup 48}Cr.

Gao Zaochun; Chen, Y. S.; Chen, Y. J. [China Institute of Atomic Energy P.O. Box 275-10, Beijing 102413 (China); Horoi, Mihai [Department of Physics, Central Michigan University, Mount Pleasant, Michigan 48859 (United States); Tuya [College of Physics Science and Technology, Shenyang Normal University, ShenYang 110034 (China)

2011-05-15T23:59:59.000Z

252

Development of a New Class of Fe-3Cr-W(V) Ferritic Steels for Industrial Process Applications  

SciTech Connect

The project described in this report dealt with improving the materials performance and fabrication for hydrotreating reactor vessels, heat recovery systems, and other components for the petroleum and chemical industries. These reactor vessels can approach ship weights of about 300 tons with vessel wall thicknesses of 3 to 8 inches. They are typically fabricated from Fe-Cr-Mo alloy steels, containing 1.25 to 12% chromium and 1 to 2% molybdenum. The goal of this project was to develop Fe-Cr-W(V) steels that can perform similar duties, in terms of strength at high temperatures, but will weigh less and thereby save energy.

Jawad, Mann; Sikka, Vinod K.

2005-04-06T23:59:59.000Z

253

Interaction between (La, Sr)MnO3 cathode and NiMoCr metallic interconnect with suppressed chromium vaporization for solid oxide fuel cells  

Science Journals Connector (OSTI)

Interaction between (La0.8Sr0.2)0.90MnO3 (LSM) cathode and newly developed NiMoCr metallic interconnect is investigated at 900C under operation conditions of solid oxide fuel cells (SOFCs). The results show that chromium deposition on the LSM cathodes in the presence of NiMoCr interconnect is remarkably reduced as compared to that in the presence of a conventional FeCr metallic interconnect (RA446). In contact with the NiMo-Cr interconnect the overpotential, ?, for the O2 reduction reaction on LSM cathode decreased from 529 to 111mV during the 1200min current passage at 200mA/cm2. In contrast, ? increased from 464 to 561mV for the reaction in the presence of a RA446 interconnect. The decrease in ? clearly indicates that chromium poisoning effect of the NiMoCr interconnect is also significantly suppressed as compared to that with conventional FeCr interconnect materials. The suppressed Cr deposition and poisoning effects observed on the LSM cathodes demonstrate promising potential of the NiMoCr alloy as new interconnect materials with significant suppressed chromium vaporization and deposition for SOFCs.

Xinbing Chen; Bin Hua; Jian Pu; Jian Li; Lan Zhang; San Ping Jiang

2009-01-01T23:59:59.000Z

254

The effect of Mn on the oxidation behavior and electrical conductivity of Fe17Cr alloys in solid oxide fuel cell cathode atmosphere  

Science Journals Connector (OSTI)

Four Fe17Cr alloys with various Mn contents between 0.0 and 3.0wt.% are prepared for investigation of the effect of Mn content on the oxidation behavior and electrical conductivity of the FeCr alloys for the application of metallic interconnects in solid oxide fuel cells (SOFCs). During the initial oxidation stage (within 1min) at 750C in air, Cr is preferentially oxidized to form a layer of Cr2O3 type oxide in all the alloys, regardless the Mn content, with similar oxidation rate and oxide morphology. The subsequent oxidation of the Mn containing alloys is accelerated caused by the fast outward diffusion of Mn ions across the Cr2O3 type oxide layer to form Mn-rich (Mn, Cr)3O4 and Mn2O3 oxides on the top. After 700h oxidation a multi-layered oxide scale is observed in the Mn containing alloys, which corresponds to a multi-stage oxidation kinetics in the alloys containing 0.5 and 1.0wt.% of Mn. The oxidation rate and ASR of the oxide scale increase with the Mn content in the alloy changes from 0.0 to 3.0wt.%. For the application of metallic interconnects in SOFCs, Mn-free Fe17Cr alloy with conducting Cr free spinel coatings is preferred.

Bin Hua; Yonghong Kong; Wenying Zhang; Jian Pu; Bo Chi; Li Jian

2011-01-01T23:59:59.000Z

255

Thermally Nitrided Stainless Steels for Polymer Electrolyte Membrane Fuel Cell Bipolar Plates: Part 1 Model Ni-50Cr and Austenitic 349TM alloys  

SciTech Connect

Thermal nitridation of a model Ni-50Cr alloy at 1100 C for 2 h in pure nitrogen resulted in the formation of a continuous, protective CrN/Cr{sub 2}N surface layer with a low interfacial contact resistance. Application of similar nitridation parameters to an austenitic stainless steel, 349{sup TM}, however, resulted in a discontinuous mixture of discrete CrN, Cr{sub 2}N and (Cr,Fe){sub 2}N{sub 1-x} (x = 0--0.5) phase surface particles overlying an exposed {gamma} austenite-based matrix, rather than a continuous nitride surface layer. The interfacial contact resistance of the 349{sup TM} was reduced significantly by the nitridation treatment. However, in the simulated PEMFC environments (1 M H{sub 2}SO{sub 4} + 2 ppm F{sup -} solutions at 70 C sparged with either hydrogen or air), very high corrosion currents were observed under both anodic and cathodic conditions. This poor behavior was linked to the lack of continuity of the Cr-rich nitride surface formed on 349{sup TM} Issues regarding achieving continuous, protective Cr-nitride surface layers on stainless steel alloys are discussed.

Wang, Heli [National Renewable Energy Laboratory (NREL); Brady, Michael P [ORNL; Turner, John [National Renewable Energy Laboratory (NREL)

2004-01-01T23:59:59.000Z

256

tEEK TRANSACJ'JONS ON AUTOMATIC CONTROL. VOL. 36, NO. 7. JULY 1991890 J. C. Jtsangand E. A. Jonckheere, "On compudng the spxtrsd nw.fiua  

E-Print Network (OSTI)

! Equations. ErtglewnodCliffs. NJ: Prentice-Hall. 1964. C. Kenney and G. Hewer, "The senslrivity of the afgebraic and differential Riccati equations," Slit&f J. Corer. Oprimiz., vol. 28, Pp. 50-69., 1990. G. WBM Corporation under the SUR Contract SL 88086, D.S.T.O. of Australia, and by Boeing (WAC). R. Horowitz and W

Moore, John Barratt

257

Audit Report: CR-B-98-02 | Department of Energy  

NLE Websites -- All DOE Office Websites (Extended Search)

2 2 Audit Report: CR-B-98-02 November 14, 1997 Audit of Management of the Laboratory Directed Research and Development Program at the Lawrence Livermore National Laboratory The Department's national laboratories, since their establishment, have been permitted to conduct a limited amount of discretionary research activities. The Department's Defense Program laboratories, such as the Lawrence Livermore National Laboratory, generate funding for Laboratory Directed Research and Development (LDRD) programs by charging their total laboratory operating and capital equipment budgets a flat surcharge of up to 6 percent. The ceiling was mandated by the Congress in authorization legislation. This audit was performed to determine whether the LDRD program at Lawrence Livermore was managed in accordance with applicable laws and

258

Audit Report: CR-B-98-01 | Department of Energy  

NLE Websites -- All DOE Office Websites (Extended Search)

1 1 Audit Report: CR-B-98-01 October 8, 1997 Audit of the Internal Control Structure of the Department of Energy's Working Capital Fund The Subcommittee on Energy and Water Development of the Committee on Appropriations, in its report dated July 16, 1996, approved the implementation of a Working Capital Fund (Fund) at the U.S. Department of Energy. The Subcommittee also directed the Office of Inspector General to conduct periodic audits of the Fund. This audit was conducted to determine if the Department established an effective system of controls over the Fund. Our specific objectives were to determine if internal controls were sufficient to ensure that appropriate costs were allocated in a reasonable and unbiased manner and in a way that was consistent with the expectations

259

Audit Report: CR-B-98-01 | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

1 1 Audit Report: CR-B-98-01 October 8, 1997 Audit of the Internal Control Structure of the Department of Energy's Working Capital Fund The Subcommittee on Energy and Water Development of the Committee on Appropriations, in its report dated July 16, 1996, approved the implementation of a Working Capital Fund (Fund) at the U.S. Department of Energy. The Subcommittee also directed the Office of Inspector General to conduct periodic audits of the Fund. This audit was conducted to determine if the Department established an effective system of controls over the Fund. Our specific objectives were to determine if internal controls were sufficient to ensure that appropriate costs were allocated in a reasonable and unbiased manner and in a way that was consistent with the expectations

260

Audit Report: CR-B-97-01 | Department of Energy  

NLE Websites -- All DOE Office Websites (Extended Search)

1 1 Audit Report: CR-B-97-01 October 22, 1997 Audit of Department of Energy's Warehouse Space The downsizing of Department of Energy (Department) facilities as a result of the end of the Cold War may have a negative impact on many communities that were heavily dependent on Departmental operations for economic stability. To lessen the negative effects on these communities, the Department has encouraged the formation of local community reuse organizations. These organizations determine and sponsor economic development initiatives to offset the local consequences of the Department's downsizing. The Department provided financial assistance to these organizations through grants and cooperative agreements. We initiated this audit to determine whether economic development grants and

Note: This page contains sample records for the topic "ire cr eek" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Mn-Fe base and Mn-Cr-Fe base austenitic alloys  

DOE Patents (OSTI)

Manganese-iron base and manganese-chromium-iron base austenitic alloys designed to have resistance to neutron irradiation induced swelling and low activation have the following compositions (in weight percent): 20 to 40 Mn; up to about 15 Cr; about 0.4 to about 3.0 Si; an austenite stabilizing element selected from C and N, alone or in combination with each other, and in an amount effective to substantially stabilize the austenite phase, but less than about 0.7 C, and less than about 0.3 N; up to about 2.5 V; up to about 0.1 P; up to about 0.01 B; up to about 3.0 Al; up to about 0.5 Ni; up to about 2.0 W; up to about 1.0 Ti; up to about 1.0 Ta; and with the remainder of the alloy being essentially iron.

Brager, Howard R. (Richland, WA); Garner, Francis A. (Richland, WA)

1987-01-01T23:59:59.000Z

262

Helium generation rates in isotopically tailored Fe-Cr-Ni alloys irradiated in FFTF/MOTA  

SciTech Connect

Three Fe-Cr-Ni alloys have been doped with 0.4% {sup 59}Ni for side-by-side irradiations of doped and undoped materials in order to determine the effects of fusion-relevant levels of helium production on microstructural development and mechanical properties. The alloys were irradiated in three successive cycles of the Materials Open Test Assembly (MOTA) located in the Fast Flux Test Facility (FFTF). Following irradiation, helium levels were measured by isotope dilution mass spectrometry. The highest level of helium achieved in doped alloys was 172 appm at 9.1 dpa for a helium(appm)-to-dpa ratio of 18.9. The overall pattern of predicted helium generation rates in doped and undoped alloys is in good agreement with the helium measurements.

Greenwood, L.R.; Garner, F.A. [Pacific Northwest Lab., Richland, WA (United States); Oliver, B.M. [Rockwell International Corp., Canoga Park, CA (United States). Rocketdyne Div.

1991-11-01T23:59:59.000Z

263

Thermodynamic modeling and experimental validation of the Fe-Al-Ni-Cr-Mo alloy system  

SciTech Connect

NiAl-type precipitate-strengthened ferritic steels have been known as potential materials for the steam turbine applications. In this study, thermodynamic descriptions of the B2-NiAl type nano-scaled precipitates and body-centered-cubic (BCC) Fe matrix phase for four alloys based on the Fe-Al-Ni-Cr-Mo system were developed as a function of the alloy composition at the aging temperature. The calculated phase structure, composition, and volume fraction were validated by the experimental investigations using synchrotron X-ray diffraction and atom probe tomography. With the ability to accurately predict the key microstructural features related to the mechanical properties in a given alloy system, the established thermodynamic model in the current study may significantly accelerate the alloy design process of the NiAl-strengthened ferritic steels.

Teng, Zhenke [ORNL; Zhang, F [CompuTherm LLC, Madison, WI; Miller, Michael K [ORNL; Liu, Chain T [Hong Kong Polytechnic University; Huang, Shenyan [ORNL; Chou, Y.T. [Multi-Phase Services Inc., Knoxville; Tien, R [Multi-Phase Services Inc., Knoxville; Chang, Y A [ORNL; Liaw, Peter K [University of Tennessee, Knoxville (UTK)

2012-01-01T23:59:59.000Z

264

On the origin of the low temperatures resistivity minimum in Cr thin films  

SciTech Connect

We present measurements of the electrical resistivity and Hall coefficient, ? and R{sub H}, in Cr films of different thicknesses grown on MgO (100) substrates, as a function of temperature T and applied magnetic field H. The results show a low temperature minimum in ?(T), which is thickness dependent. From 40?K to 2?K, the Hall coefficient is a monotonous increasing function as T is reduced with no particular signature at the temperature T{sub min} where the minimum develops. We explain the resistivity minimum assuming an imperfect nesting of the Fermi surface leading to small electron and hole pockets. We introduce a phenomenological model which supports this simple physical picture.

Osquiguil, E.; Tosi, L.; Kaul, E. E.; Balseiro, C. A. [Centro Atmico Bariloche and Instituto Balseiro, Comisin Nacional de Energa Atmica, 8400 Bariloche (Argentina)

2013-12-28T23:59:59.000Z

265

Temperature effect in stratospheric balloon flight exposure of CR-39 plastic detector  

Science Journals Connector (OSTI)

A CR-39 stack equipped with a passive temperature control shielding was exposed to primary cosmic radiation in a balloon flight from Trapani (Sicily) to Arenosillo (Spain) at an average altitude of 4 g cm-2 residual atmosphere for 20 h. High vertical geomagnetic cut-off ensured the relativistic nature of registered ions. Stack temperature was monitored by means of thermal probes and associated electronics and transmitted by telemetry to an earth-based station. Temperature excursions were less than 16C, which is shown to correspond to a 0.11e shift in the charge scale for relativistic iron ions. Best etching conditions were established for the VH relativistic component as well as a discrimination method for relativistic ions. Charge uncertainty was found to be 0.44e. Relative abundances for the iron group extrapolated to the top of the atmosphere are compared to those reported by other authors.

M. Ginjaume; C. Baixeras; F. Fernndez; A. Vidal-Quadras

1986-01-01T23:59:59.000Z

266

2011 Honda CR-Z 4466 - Hybrid Electric Vehicle Battery Test Results  

SciTech Connect

The U.S. Department of Energys Advanced Vehicle Testing Activity Program consists of vehicle, battery, and infrastructure testing on advanced technology related to transportation. The activity includes tests on hybrid electric vehicles, including testing traction batteries when both the vehicles and batteries are new and at the conclusion of 160,000 miles of on-road fleet testing. This report documents battery testing performed for the 2011 Honda CR-Z (VIN JHMZF1C67BS004466). Battery testing was performed by Intertek Testing Services NA. The Idaho National Laboratory and Intertek collaborate on the Advanced Vehicle Testing Activity for the Vehicle Technologies Office of the U.S. Department of Energy.

Tyler Gray; Matthew Shirk; Jeffrey Wishart

2014-09-01T23:59:59.000Z

267

2011 HONDA CR-Z 2982 - HYBRID ELECTRIC VEHICLE BATTERY TEST RESULTS  

SciTech Connect

The U.S. Department of Energys Advanced Vehicle Testing Activity Program consists of vehicle, battery, and infrastructure testing on advanced technology related to transportation. The activity includes tests on hybrid electric vehicles, including testing traction batteries when both the vehicles and batteries are new and at the conclusion of 160,000 miles of on-road fleet testing. This report documents battery testing performed for the 2011 Honda CR-Z (VIN JHMZF1C64BS002982). Battery testing was performed by Intertek Testing Services NA. The Idaho National Laboratory and Intertek collaborate on the Advanced Vehicle Testing Activity for the Vehicle Technologies Office of the U.S. Department of Energy.

Gray, Tyler [Interek; Shirk, Matthew [Idaho National Laboratory; Wishart, Jeffrey [Interek

2014-09-01T23:59:59.000Z

268

Microstructural characterization of as-cast biocompatible Co-Cr-Mo alloys  

SciTech Connect

The microstructure of a cobalt-base alloy (Co-Cr-Mo) obtained by the investment casting process was studied. This alloy complies with the ASTM F75 standard and is widely used in the manufacturing of orthopedic implants because of its high strength, good corrosion resistance and excellent biocompatibility properties. This work focuses on the resulting microstructures arising from samples poured under industrial environment conditions, of three different Co-Cr-Mo alloys. For this purpose, we used: 1) an alloy built up from commercial purity constituents, 2) a remelted alloy and 3) a certified alloy for comparison. The characterization of the samples was achieved by using optical microscopy (OM) with a colorant etchant to identify the present phases and scanning electron microscopy (SE-SEM) and energy dispersion spectrometry (EDS) techniques for a better identification. In general the as-cast microstructure is a Co-fcc dendritic matrix with the presence of a secondary phase, such as the M{sub 23}C{sub 6} carbides precipitated at grain boundaries and interdendritic zones. These precipitates are the main strengthening mechanism in this type of alloys. Other minority phases were also reported and their presence could be linked to the cooling rate and the manufacturing process variables and environment. - Research Highlights: {yields}The solidification microstructure of an ASTM-F75 type alloy were studied. {yields}The alloys were poured under an industrial environment. {yields}Carbides and sigma phase identified by color metallography and scanning microscopy (SEM and EDS). {yields}Two carbide morphologies were detected 'blocky type' and 'pearlite type'. {yields}Minority phases were also detected.

Giacchi, J.V., E-mail: jgiacchi@exa.unicen.edu.ar [Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Av. Rivadavia 1917, C1033AAJ Buenos Aires (Argentina); Instituto de Fisica de Materiales Tandil (IFIMAT-FCE-CICPBA) Facultad de Ciencias Exactas, Universidad Nacional del Centro de la Provincia de Buenos Aires, Pinto 399 B7000GHG Tandil (Argentina); Morando, C.N.; Fornaro, O. [Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Av. Rivadavia 1917, C1033AAJ Buenos Aires (Argentina); Instituto de Fisica de Materiales Tandil (IFIMAT-FCE-CICPBA) Facultad de Ciencias Exactas, Universidad Nacional del Centro de la Provincia de Buenos Aires, Pinto 399 B7000GHG Tandil (Argentina); Palacio, H.A. [Comision de Investigaciones Cientificas de la Provincia de Buenos Aires (CICPBA), Calle 526 e/10 y 11 B1096APP La Plata (Argentina); Instituto de Fisica de Materiales Tandil (IFIMAT-FCE-CICPBA) Facultad de Ciencias Exactas, Universidad Nacional del Centro de la Provincia de Buenos Aires, Pinto 399 B7000GHG Tandil (Argentina)

2011-01-15T23:59:59.000Z

269

Targeting Cancer More Effectively CR@B brings together researchers from across the University and the Royal United Hospital, Bath.  

E-Print Network (OSTI)

Targeting Cancer More Effectively CR@B brings together researchers from across the University to find a cure for various types of cancer. 40 academic groups from nearly every department to bedside and back again. Drug Discovery The discovery of a new family of anti-cancer drugs called steroid

Burton, Geoffrey R.

270

Re-Evaluation of Results in NUREG/CR-6674 for Carbon and Low-Alloy Steel Components (MRP-76)  

SciTech Connect

This report evaluates the conservatisms and uncertainties reported in NUREG/CR-6674 that lead to high probabilities of cracking in carbon and low-alloy steel for reactor piping. The report uses additional data generated since the completion of the report to eliminate uncertainties and show lower probabilities of cracking.

A. Deardorff; D. Harris; D. Dedhia

2002-11-30T23:59:59.000Z

271

Transmission infrared spectra (225 lm) of carbonaceous chondrites (CI, CM, CVCK, CR, C2 ungrouped): Mineralogy, water, and asteroidal  

E-Print Network (OSTI)

Transmission infrared spectra (2­25 lm) of carbonaceous chondrites (CI, CM, CV­CK, CR, C2 ungrouped t In this work, infrared transmission spectra (2­25 lm range, 5000­400 cm?1 ) of 40 carbonaceous chon- drites. The variability in the silicate features is correlated with the intensity of an ­OH related absorption at 3-lm

Montes-Hernandez, German

272

The CR 2.0mm (.079") insulation displacement connector features a mounting height as low as  

E-Print Network (OSTI)

7 The CR 2.0mm (.079") insulation displacement connector features a mounting height as low as 6.9mm") pitch insulation displacement connector allows automatic harness production for connection of UL1007 of misinsertion without being permanently distorted. · Twin U-slot insulation displacement section The insulation

Wedeward, Kevin

273

FeCoCr nanocomposites for application in self-regulated rf heating K. J. Miller,1,a  

E-Print Network (OSTI)

Fe­Co­Cr nanocomposites for application in self-regulated rf heating K. J. Miller,1,a A. Colletti,1, appropriate for ferrofluid cooling and self-regulated heating applications. These alloys have low Curie temperatures, moderate magnetic moments and provide increased heat capacity in a liquid used in a thermal cycle

McHenry, Michael E.

274

Neutron, Electron and X-ray Scattering Investigation of Cr1-xVx Near Quantum Criticality  

SciTech Connect

The weakness of electron-electron correlations in the itinerant antiferromagnet Cr doped with V has long been considered the reason that neither new collective electronic states or even non Fermi liquid behaviour are observed when antiferromagnetism in Cr1 xVx is suppressed to zero temperature. We present the results of neutron and electron diffraction measurements of several lightly doped single crystals of Cr1 xVx in which the archtypal spin density wave instability is progressively suppressed as the V content increases, freeing the nesting-prone Fermi surface for a new striped charge instability that occurs at xc=0.037. This novel nesting driven instability relieves the entropy accumulation associated with the suppression of the spin density wave and avoids the formation of a quantum critical point by stabilising a new type of charge order at temperatures in excess of 400 K. Restructuring of the Fermi surface near quantum critical points is a feature found in materials as diverse as heavy fermions, high temperature copper oxide superconductors and now even elemental metals such as Cr.

Sokolov, D A [Brookhaven National Laboratory (BNL); Aronson, Meigan C. [Brookhaven National Laboratory (BNL); Wu, Lijun [Brookhaven National Laboratory (BNL); Zhu, Yimei [Brookhaven National Laboratory (BNL); Nelson, C. [Brookhaven National Laboratory (BNL); Mansfield, J. F. [University of Michigan; Sun, K. [University of Michigan; Erwin, R. [National Institute of Standards and Technology (NIST); Lynn, J. W. [National Institute of Standards and Technology (NIST); Lumsden, Mark D [ORNL; Nagler, Stephen E [ORNL

2014-01-01T23:59:59.000Z

275

Abstract Variation in the carbon isotopic composition of ecosystem respiration (13CR) was studied for 3 years  

E-Print Network (OSTI)

coast to the eastern side of the Cascade Mountains (a 250-km transect). Mean annual precipita- tion of gas exchange and associated changes in photosynthetic carbon isotope discrimination. Recent freeze). The extent to which and 13CR vary could po- tentially alter conclusions about the timing and nature

Ehleringer, Jim

276

Effects of preformed alumina scales on the behavior of FeCrAl alloys in simulated coal-gasifier atmospheres  

Science Journals Connector (OSTI)

Iron-based mechanical alloys containing 3.26.6 Al, 16.024.7 Cr, 0.5 Ti, and 0.5 Y2O3 (mass%) were preoxidized in air at 1373 K for 10180 min. Alumina scales were formed. Scales were isolated and examined in a ...

J. K. Richard Weber; M. G. Hocking

1989-08-01T23:59:59.000Z

277

Vibrational coherence in the excited state dynamics of Cr(acac)3: probing the reaction coordinate for ultrafast intersystem crossing  

E-Print Network (OSTI)

Vibrational coherence in the excited state dynamics of Cr(acac)3: probing the reaction coordinateCusker* Received 12th April 2010, Accepted 29th May 2010 DOI: 10.1039/c0sc00262c Vibrational coherence was observed coherence; the timescale of the event suggests that this vibrational coherence is retained during the 4 T2

McCusker, James K.

278

Combined filtered cathodic arc etching pretreatment-magnetron sputter deposition of highly adherent CrN films  

SciTech Connect

CrN films were prepared on steel substrates by a hybrid method utilizing filtered cathodic arc for Cr ion pretreatment and magnetron sputtering for coating deposition. During pretreatment the substrates were biased to -1200 V and exposed to filtered chromium plasma. The substrate-coating interface formed during the pretreatment contained a Cr-enriched modified layer with composition that was strongly influenced by the temperature of the substrate as observed by scanning transmission electron microscopy--energy dispersive spectroscopy. The modified layer had a nanocrystalline morphology and thickness of 15 nm. The path of formation of the layer is linked to the combined action of implantation, diffusion, and resputtering. The resulting adhesion of 3 {mu}m thick CrN films was very high with scratch test critical load values of 83 N. The morphology of the films was smooth without large scale defects and the microstructure was columnar. The coatings behaved well in dry sliding tests with very low wear coefficients of 2.3x10{sup -16} m{sup 3} N{sup -1} m{sup -1}, which can be linked to the high adhesion and defect-free microstructure. The smooth coatings also had a high resistance to corrosion as demonstrated by potentiodynamic tests with particularly high pitting potentials of +800 mV.

Ehiasarian, A. P.; Anders, A.; Petrov, I. [Materials and Engineering Research Institute, Sheffield Hallam University, Howard St., Sheffield S1 1WB (United Kingdom); Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States); Frederick Seitz Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801 (United States)

2007-05-15T23:59:59.000Z

279

Sputter-Deposited Pt/CrN Nanoparticle PEM Fuel Cell Cathodes: Limited Proton Conductivity Through Electrode  

E-Print Network (OSTI)

Sputter-Deposited Pt/CrN Nanoparticle PEM Fuel Cell Cathodes: Limited Proton Conductivity Through for proton exchange membrane PEM fuel cells. X-ray diffraction and scanning electron microscopy show manuscript received September 17, 2009. Published November 13, 2009. Proton exchange membrane PEM fuel cells

Gall, Daniel

280

Intrinsic stress development and microstructure evolution of Au/Cr/Si multilayer thin films subject to annealing  

E-Print Network (OSTI)

and contacts [4], RF or high frequency compo- nents including switches [5] or variable capacitors [6], chemical a , Ken Gall a a Department of Mechanical Engineering, 111 Engineering Drive, University of Colorado/Cr/Si structures were originally re- searched for use in hybrid (high frequency) circuits [1]. Such multilayer

George, Steven M.

Note: This page contains sample records for the topic "ire cr eek" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Combined use of a transformed red mud reactive barrier and electrokinetics for remediation of Cr/As contaminated soil  

Science Journals Connector (OSTI)

A reactive barrier (RB) of transformed red mud (TRM), a by-product of the refinement of bauxite in alumina production, was placed adjacent to the anode of an electrokinetic (EK) system with the aim of enhancing removal of chromium or arsenic, added singly to a low permeability clayey soil, and favouring entrapment. The innovative study focused on evaluation of the synergic interaction between the EK system and the RB, and of the efficiency when compared to traditional EK remediation (control tests). The results obtained underlined the successful outcome of treatment of the Cr(VI)-contaminated soil. In presence of the TRM RB, 19.4% wt. of total Cr content was detected in the anolyte and 20.6% wt. trapped in the anodic RB after 6d, versus 6.6% wt. in the anolyte and 8.8% wt. in the soil adjacent to the anode following the control run without RB. On increasing duration of treatment up to 12d, 60.8% wt. of total initial Cr was found in the anolyte and 25.5% wt. trapped in the RB, versus 9.1% wt. and 5.3% wt., respectively, after a control run of the same duration. Finally, on increasing the mass of TRM in the RB, 60.6% wt. of initial Cr content was found to have accumulated in the RB, with Cr being completely absent from the anodic chamber. Conversely, combined treatment was much less effective on As contaminated soil, at least under the operative conditions applied. Low initial As concentration and interference with iron oxides in the soil were likely the reasons underlying low efficiency while attempting As decontamination.

G. Cappai; G. De Gioannis; A. Muntoni; D. Spiga; J.J.P. Zijlstra

2012-01-01T23:59:59.000Z

282

Chemical spray pyrolysis deposition and characterization of p-type CuCr1?xMgxO2 transparent oxide semiconductor thin films  

Science Journals Connector (OSTI)

A chemical spray pyrolysis technique for deposition of p-type Mg-doped CuCrO2 transparent oxide semiconductor thin films using metaloorganic precursors is described. As-deposited films contain mixed spinel CuCr2O4 and delafossite CuCrO2 structural phases. Reduction in spinel CuCr2O4 fraction and formation of highly crystalline films with single phase delafossite CuCrO2 structure is realized by annealing at temperatures ?700C in argon. A mechanism of synthesis of CuCrO2 films involving precursor decomposition, oxidation and reaction between constituent oxides in the spray deposition process is presented. Post-annealed CuCr0.93Mg0.07O2 thin films show high (?80%) visible transmittance and sharp absorption at band gap energy with direct and indirect optical band gaps 3.11 and 2.58eV, respectively. Lower (?450C) substrate temperature formed films are amorphous and yield lower direct (2.96eV) and indirect (2.23eV) band gaps after crystallization. Electrical conductivity of CuCr0.93 Mg0.07O2 thin films ranged 0.61Scm?1 and hole concentration ?21019cm?3 determined from Seebeck analysis. Temperature dependence of conductivity exhibit activation energies ?0.11eV in 300470K and ?0.23eV in ?470K region ascribed to activated conduction and grain boundary trap assisted conduction, respectively. Heterojunction diodes of the structure Au/n-(ZnO)/p-(CuCr0.93Mg0.07O2)/SnO2 (TCO) were fabricated which show potential for transparent wide band gap junction device.

S.H. Lim; Suma Desu; A.C. Rastogi

2008-01-01T23:59:59.000Z

283

Microstructural evolution during solution treatment of Co-Cr-Mo-C biocompatible alloys  

SciTech Connect

Three different Co-Cr-Mo-C alloys conforming to ASTM F75 standard were poured in an industrial environment and subjected to a conventional solution treatment at 1225 Degree-Sign C for several time intervals. The microstructural changes and transformations were studied in each case in order to evaluate the way in which treatment time influences the secondary phase fraction and clarify the microstructural changes that could occur. To assess how treatment time affects microstructure, optical microscopy and image analyzer software, scanning electron microscopy and energy dispersion spectrometry analysis were employed. The main phases detected in the as-cast state were: {sigma}-phase, M{sub 6}C, and M{sub 23}C{sub 6} carbides. The latter presented two different morphologies, blocky type and lamellar type. Despite being considered the most detrimental feature to mechanical properties, {sigma}-phase and lamellar carbides dissolution took place in the early stages of solution treatment. M{sub 23}C{sub 6} carbides featured two different behaviors. In the alloy obtained by melting an appropriate quantity of alloyed commercial materials, a decrease in size, spheroidization and transformation into M{sub 6}C carbides were simultaneously observed. In the commercial ASTM F75 alloy, in turn, despite being the same phase, only a marked decrease in precipitates size was noticed. These different behaviors could be ascribed to the initial presence of other phases in the alloy obtained from alloyed materials, such as {sigma}-phase and 'pearlitic' carbides, or to the initial precipitate size which was much larger in the first than in the commercial ASTM F75 alloy studied. M{sub 6}C carbides dissolved directly in the matrix as they could not be detected in samples solution-treated for 15 min. - Highlights: Black-Right-Pointing-Pointer Three different Co-Cr-Mo alloys were poured under an industrial environment. Black-Right-Pointing-Pointer Transformation of existing phases followed during conventional solution treatment. Black-Right-Pointing-Pointer In as-cast/treated samples, phases were identified by color metallography, SEM and EDS. Black-Right-Pointing-Pointer M{sub 23}C{sub 6} {yields} M{sub 6}C transformation was corroborated by SEM and EDS analysis. Black-Right-Pointing-Pointer Carbide spheroidization was also detected prior a noticeably carbide size decreasing.

Giacchi, J.V., E-mail: jgiacchi@exa.unicen.edu.ar [IFIMAT, Instituto de Fisica de Materiales Tandil, Facultad de Ciencias Exactas, Universidad Nacional del Centro de la Provincia de Buenos Aires, Pinto 399, B7000GHG Tandil (Argentina); Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Av. Rivadavia 1917, C1033AA, Buenos Aires (Argentina); Fornaro, O. [IFIMAT, Instituto de Fisica de Materiales Tandil, Facultad de Ciencias Exactas, Universidad Nacional del Centro de la Provincia de Buenos Aires, Pinto 399, B7000GHG Tandil (Argentina); Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Av. Rivadavia 1917, C1033AA, Buenos Aires (Argentina); Palacio, H. [IFIMAT, Instituto de Fisica de Materiales Tandil, Facultad de Ciencias Exactas, Universidad Nacional del Centro de la Provincia de Buenos Aires, Pinto 399, B7000GHG Tandil (Argentina); Comision de Investigaciones Cientificas de la Provincia de Buenos Aires (CICPBA), Calle 526 e/10 y 11, B1096APP, La Plata (Argentina)

2012-06-15T23:59:59.000Z

284

Corrosion and Stress Corrosion Cracking of High Cr Ferritic-Martensitic Steels in Supercritical Water  

SciTech Connect

Corrosion behavior of the F-M (ferritic-martensitic) steels (T91, T92, T122) and Fe-base ODS (oxide dispersion strengthened) alloy (MA956{sup TM}) were evaluated in an aerated (8 ppm D.O.) SCW (supercritical water) at the temperature range between 300 and 627 deg C under 25 MPa. In aerated SCW the weight change of the F-M steel specimens became greater as the test temperature increased. However, the extent of the weight change at 350 deg C, just below the critical temperature appeared not to be less than those at 550 deg C. And the weight changes of all the F-M steel specimens in the deaerated SCW (for 347 hrs in 100 ppb D.O. for 347 hrs, and in 10 ppb D.O. for 432 hrs) tended to converge to about 1 mgcm{sup -2}. In aerated or deaerated conditions 20Cr Fe-base ODS alloy appeared to be very resistant to a SCW corrosion at all the test temperatures up to 500 hrs. Stress corrosion cracking (SCC) behavior of 9Cr F-M steels (T91 and T92) was investigated by CERT (Constant Extension Rate Test) in SCW at various temperatures and D.O. levels with different strain rates. T91 did not show any evidence of a SCC in a fully deaerated (below 10 ppb D.O.) SCW at 500, 550, and 600 deg C at the test conditions. T92 specimens were tested at 500 deg C in SCW with different D.O. levels. The strain rate did not seem to affect the SCC behavior of the T92 steel, but D.O. in SCW seems to affect the SCC behavior to some extent. The total elongation of T92 in SCW of 100 ppb or of 500 ppb D.O. was significantly smaller than that at a fully deaerated (below 10 ppb D.O.) SCW (about 15 vs. 20%), and it appears to provide a clue to a SCC on the fracture surface after the CERT test. (authors)

Jinsung, Jang; Seong Sik, Hwang; Chang Hee, Han; Byung Hak, Lee [Korea Atomic Energy Research Institute, 150 Deokjin-dong, Yuseong-gu, Daejeon, 305-353 (Korea, Republic of)

2006-07-01T23:59:59.000Z

285

{beta}-delayed emission of protons at the proton drip-line: the cases of {sup 43}Cr and {sup 51}Ni  

SciTech Connect

Studies of {beta}-delayed emission of protons for {sup 43}Cr and {sup 51}Ni were performed with a Time Projection Chamber. This detection setup allows to reconstruct in the three-dimensional space the tracks of the protons emitted. For the first time, {beta}-delayed emission of two protons is directly observed for {sup 43}Cr and {sup 51}Ni. The question about correlations between protons can be accessed. Finally, we show that {sup 43}Cr can emit up to three delayed protons.

Audirac, L. [CENBG, Chemin du Solarium, BP 120, F-33175 Gradignan Cedex (France); CEA Saclay, DSM/Irfu/SPhN, Orme des Merisiers, F-91191 Gif-sur-Yvette Cedex (France); Adimi, N.; Ascher, P.; Blank, B.; Canchel, G.; Demonchy, C. E.; Companis, I.; Delalee, F.; Demonchy, C. E.; Dossat, C.; Giovinazzo, J.; Grevy, S.; Hay, L.; Huikari, J.; Kurtukian-Nieto, T.; Leblanc, S.; Pedroza, J.-L.; Pibernat, J.; Serani, L. [CENBG, Chemin du Solarium, BP 120, F-33175 Gradignan Cedex (France); Borcea, C. [NIPNE, P.O. Box MG6, Bucharest-Magurele (Romania); and others

2011-11-30T23:59:59.000Z

286

Star formation in z>1 3CR host galaxies as seen by Herschel  

E-Print Network (OSTI)

We present Herschel (PACS and SPIRE) far-infrared (FIR) photometry of a complete sample of z>1 3CR sources, from the Herschel GT project The Herschel Legacy of distant radio-loud AGN (PI: Barthel). Combining these with existing Spitzer photometric data, we perform an infrared (IR) spectral energy distribution (SED) analysis of these landmark objects in extragalactic research to study the star formation in the hosts of some of the brightest active galactic nuclei (AGN) known at any epoch. Accounting for the contribution from an AGN-powered warm dust component to the IR SED, about 40% of our objects undergo episodes of prodigious, ULIRG-strength star formation, with rates of hundreds of solar masses per year, coeval with the growth of the central supermassive black hole. Median SEDs imply that the quasar and radio galaxy hosts have similar FIR properties, in agreement with the orientation-based unification for radio-loud AGN. The star-forming properties of the AGN hosts are similar to those of the general popul...

Podigachoski, P; Haas, M; Leipski, C; Wilkes, B; Kuraszkiewicz, J; Westhues, C; Willner, S P; Ashby, M L N; Chini, R; Clements, D L; Fazio, G G; Labiano, A; Lawrence, C; Meisenheimer, K; Peletier, R F; Siebenmorgen, R; Kleijn, G Verdoes

2015-01-01T23:59:59.000Z

287

ROOM TEMPERATURE COMPRESSION PROPERTIES OF TWO HEATS OF UNIRRADIATED V-4Cr-4Ti  

SciTech Connect

Vanadium alloys are of interest to the Fusion program as potential first wall structural materials. The expected irradiation conditions for the first wall structural material include a range of temperatures where very high hardening caused by a high density of small, but shearable defect clusters results in a type of deformation called "localized deformation". At the onset of yield in a tensile test, a dislocation may move through a grain shearing the obstacles and clearing out a channel. Subsequent dislocations may easily pass through this channel. As the test progresses, more channels form. In the early stages of deformation, it is thought that the plastic deformation is confined to these channels. One important macroscopic result of this deformation behavior is rapid onset of necking in a tensile test and very low uniform elongation. As a means to help understand the range of stress states where localized deformation may adversely affect macroscopic ductility in vanadium alloys, compression test specimens fabricated from two heats of V-4Cr-4Ti are currently under irradiation in the High Flux Isotope Reactor (HFIR). The results of room temperature compression tests on the unirradiated control materials are presented here and compared with uniaxial tensile values from the literature.

Toloczko, Mychailo B.; Kurtz, Richard J.

2004-06-30T23:59:59.000Z

288

Tuning the Magnetic Exchange via a Control of Orbital Hybridization in Cr2(Te1?xWx)O6  

Science Journals Connector (OSTI)

We report the complex magnetic phase diagram and electronic structure of Cr2(Te1?xWx)O6 systems. While compounds with different x values possess the same crystal structure, they display different magnetic structures below and above xc=0.7, where both the transition temperature TN and sublattice magnetization (Ms) reach a minimum. Unlike many known cases where magnetic interactions are controlled either by injection of charge carriers or by structural distortion induced via chemical doping, in the present case it is achieved by tuning the orbital hybridization between Cr?3d and O?2p orbitals through W?5d states. The result is supported by abinitio electronic structure calculations. Through this concept, we introduce a new approach to tune magnetic and electronic properties via chemical doping.

M. Zhu; D. Do; C.?R. Dela Cruz; Z. Dun; H.?D. Zhou; S.?D. Mahanti; X. Ke

2014-08-12T23:59:59.000Z

289

A transmission electron microscopy investigation of inverse melting in Nb{sub 45}Cr{sub 55}  

SciTech Connect

In inverse melting, a supersaturated crystalline phase transforms polymorphously under heat treatment to the amorphous state. Inverse melting of body-centered cubic (bcc) Nb{sub 45}Cr{sub 55} is studied using transmission electron microscopy (TEM) and high resolution TEM (HRTEM). The crystalline to amorphous transformation is heterogeneous, initiating at the bcc grain boundaries. HRTEM reveals 2-3 nm domains with medium range order (MRO) in the amorphous phase. Preferred orientation of MRO domains is found on a scale corresponding to the precursor bcc grain size. Using HRTEM and calorimetry, MRO development in cosputtered Nb{sub 45}Cr{sub 55} films is characterized and compared to that in the amorphous phase produced by inverse melting. {copyright} {ital 1997 Materials Research Society.}

Sinkler, W.; Michaelsen, C.; Bormann, R. [Institute for Materials Research, GKSS Research Center, 21502 Geesthacht (Germany)

1997-07-01T23:59:59.000Z

290

Electronic conductivity in NixCr1-x and NixCu1-x fcc alloy systems  

Science Journals Connector (OSTI)

First-principles calculations of transport properties of disordered alloys based on the Kubo-Greenwood formalism and the spin-polarized Korringa-Kohn-Rostoker coherent potential approximation are presented. Application to the fcc alloy systems NixCr1-x and NixCu1-x yields results for the residual resistivity, anomalous magnetoresistance, and the magnetic moments that are in very satisfying agreement with experiment. In particular, the different sign for the resistance anisotropy in NixCr1-x and NixCu1-x and the concentration of the onset of magnetism could be reproduced. Scalar-relativistic calculations were performed on the basis of the two-current model in order to assess the importance of relativistic effects in these systems.

A. Vernes, H. Ebert, and J. Banhart

2003-10-03T23:59:59.000Z

291

Cr, N-Codoped TiO2 Mesoporous Microspheres for Li-ion Rechargeable Batteries with Enhanced Electrochemical Performance  

SciTech Connect

Cr,N-codoped TiO2 mesoporous microspheres synthesized using hydrothermal and subsequent nitridation treatment, exhibited higher solubility of nitrogen, and improved electrical conductivity than N-doped TiO2, as anode for Lithium-ion rechargeable batteries, which led to improving charge-discharge capacity at 0.1 C and twice higher rate capability compared to that of nitrogen-doped TiO2 mesoporous microsphere at 10 C

Bi, Zhonghe [ORNL] [ORNL; Paranthaman, Mariappan Parans [ORNL] [ORNL; Guo, Bingkun [ORNL] [ORNL; Unocic, Raymond R [ORNL] [ORNL; Meyer III, Harry M [ORNL] [ORNL; Bridges, Craig A [ORNL] [ORNL; Sun, Xiao-Guang [ORNL] [ORNL; Dai, Sheng [ORNL] [ORNL

2014-01-01T23:59:59.000Z

292

Development of A New Class of Fe-3Cr-W(V)Ferritic Steels for Industrial Process Applications  

SciTech Connect

The project, 'Development of a New Class of Fe-Cr-W(V) Ferritic Steels for Industrial Process Applications', was a Cooperative Research and Development Agreement (CRADA) between Oak Ridge National Laboratory (ORNL) and Nooter Corporation. This project dealt with improving the materials performance and fabrication for the hydrotreating reactor vessels, heat recovery systems, and other components for the petroleum and chemical industries. The petroleum and chemical industries use reactor vessels that can approach the ship weights of approximately 300 tons with vessel wall thicknesses of 3 to 8 in. These vessels are typically fabricated from Fe-Cr-Mo steels with chromium ranging from 1.25 to 12% and molybdenum from 1 to 2%. Steels in this composition have great advantages of high thermal conductivity, low thermal expansion, low cost, and properties obtainable by heat treatment. With all of the advantages of Fe-Cr-Mo steels, several issues are faced in design and fabrication of vessels and related components. These issues include the following: (1) low strength properties of current alloys require thicker sections; (2) increased thickness causes heat-treatment issues related to nonuniformity across the thickness and thus not achieving the optimum properties; (3) fracture toughness (ductile-to-brittle transition ) is a critical safety issue for these vessels, and it is affected in thick sections due to nonuniformity of microstructure; (4) PWHT needed after welding and makes fabrication more time-consuming with increased cost; and (5) PWHT needed after welding also limits any modifications of the large vessels in service. The goal of this project was to reduce the weight of large-pressure vessel components (ranging from 100 to 300 tons) by approximately 25% and reduce fabrication cost and improve in-service modification feasibility through development of Fe-3Cr-W(V) steels with combination of nearly a 50% higher strength, a lower DBTT and a higher upper-shelf energy, ease of heat treating, and a strong potential for not requiring PWHT.

Sikka, V.J.; Jawad, M.H. (Nooter Corp.)

2005-06-15T23:59:59.000Z

293

Reactions of Ethylidene on a Model Chromia Surface: 1 1-Dichloroethane on Stoichiometric alpha-Cr2O3 (1012)  

SciTech Connect

The reaction of CH{sub 3}CHCl{sub 2} over the nearly-stoichiometric {alpha}-Cr{sub 2}O{sub 3} (10{sub {bar 1}} > 2) surface produces an ethylidene intermediate that yields primarily gas phase CH{sub 2}{double_bond}CH{sub 2} and surface chlorine adatoms; however, trace amounts of HC{triple_bond}CH, CH{sub 3}CH{sub 3}, H{sub 2} and CH{sub 3}CH{double_bond}CHCH{sub 3} are also observed. A rate-limiting intramolecular isomerization (2,1-hydrogen shift) in the surface ethylidene species produces gas phase CH{sub 2}{double_bond}CH{sub 2}. The chlorine freed from the dissociation of CH{sub 3}CHCl{sub 2} binds at the five-coordinate surface Cr{sup 3+} sites on the stoichiometric surface, completing the octahedral coordination sphere, and inhibits the surface chemistry by simple site blocking. No surface carbon deposition is observed from the thermal reaction of 1,1-dichloroethane under the conditions of this study, demonstrating that the ethylidene intermediate is not a primary coke forming intermediate over (10{sub {bar 1}} > 2) facets of {alpha}-Cr{sub 2}O{sub 3} under the conditions of this study.

J Brooks; T Chen; D Mullins; D Cox

2011-12-31T23:59:59.000Z

294

High Temperature Thermal Stability and Oxidation Resistance of Magnetron-sputtered Homogeneous CrAlON Coatings on 430 Steel  

SciTech Connect

The requirements of low cost and high-temperature corrosion resistance for bipolar interconnect plates in solid oxide fuel cell stacks has directed attention to the use of metal plates with oxidation resistant coatings. We have investigated the performance of steel plates with homogenous coatings of CrAlON (oxynitrides). The coatings were deposited using RF magnetron sputtering, with Ar as a sputtering gas. Oxygen in these coatings was not intentionally added. Oxygen might have come through contaminated nitrogen gas bottle, leak in the chamber or from the partial pressure of water vapors. Nitrogen was added during the growth process to get oxynitride coating. The Cr/Al composition ratio in the coatings was varied in a combinatorial approach. The coatings were subsequently annealed in air for up to 25 hours at 800 deg. C. The composition of the coated plates and the rate of oxidation were characterized using Rutherford backscattering (RBS) and nuclear reaction analysis (NRA). From our results, we conclude that Al rich coatings are more susceptible to oxidation than Cr rich coatings.

Kayani, A.; Wickey, K. J.; Nandasiri, M. I.; Moore, A.; Garratt, E.; AlFaify, S.; Gao, X. [Western Michigan University-Kalamazoo, MI 49008 (United States); Smith, R. J.; Buchanan, T. L.; Priyantha, W.; Kopczyk, M.; Gannon, P. E. [Montana State University-Bozeman, MT 59717 (United States); Gorokhovsky, V. I. [Arcomac Surface Engineering, LLC-Bozeman, MT 59715 (United States)

2009-03-10T23:59:59.000Z

295

A Conceptual model of coupled biogeochemical and hydrogeological processes affected by in situ Cr(VI) bioreduction in groundwater at Hanford 100H Site  

E-Print Network (OSTI)

in Groundwater at Hanford 100H Site B.Faybishenko, P.E.Long,Cr(VI) contaminated groundwater at Hanford 100H site. A slowHRC TM ), was injected in Hanford sediments to stimulate

2006-01-01T23:59:59.000Z

296

QUEST: QUantum Electron Simulation Toolbox C.-R. Lee1,10 S. Chiesa2, C. N. Varney3,4, E. Khatami3, Z. Bai5,  

E-Print Network (OSTI)

QUEST: QUantum Electron Simulation Toolbox C.-R. Lee1,10 S. Chiesa2, C. N. Varney3,4, E. Khatami3 use of standing electromagnetic waves causes the atoms to e

Bai, Zhaojun

297

Passively Q-switched Nd:YAG/Cr$^{4+}$:YAG All-Ceramics, Composite, Monolithic Micro-Lasers with Multi-Beam Output for Laser Ignition  

Science Journals Connector (OSTI)

High-peak power passively Q-switched Nd:YAG/Cr$^{4+}$:YAG monolithic micro-lasers with two- and three-beam output were realized. These compact laser devices, which can be used as...

Pavel, Nicolaie; Tsunekane, Masaki; Taira, Takunori

298

Low-temperature oriented growth of vanadium dioxide films on CoCrTa metal template on Si and vertical metal-insulator transition  

SciTech Connect

The authors achieved oriented growth of vanadium dioxide (VO{sub 2}) films on CoCrTa metal template grown on an Si substrate. Low-temperature ({approx}250 Degree-Sign C) deposition of VO{sub 2} films using inductively coupled-plasma-assisted sputtering technique realized an abrupt interface between VO{sub 2} and CoCrTa layers, suppressing the oxidation and diffusion of metal components. The films revealed a metal-insulator transition with resistance change of over 2 orders of magnitude. The CoCrTa film, in which Co hexagonal crystalline grains with c-axis orientation were surrounded by segregated Cr and Ta, serves for the oriented growth of VO{sub 2} crystalline film, enabling higher orders of transition in resistance and low voltage switching, even for the vertical (out-of-plane) direction.

Okimura, Kunio; Mian, Md.Suruz [School of Engineering, Tokai University, 4-1-1 Kitakaname, Hiratsuka, Kanagawa 259-1292 (Japan)

2012-09-15T23:59:59.000Z

299

Changes in CR-39 proton sensitivity due to prolonged exposure to high vacuums relevant to the National Ignition Facility and OMEGA  

SciTech Connect

When used at facilities like OMEGA and the NIF, CR-39 is exposed to high vacuum environments before and after irradiation by charged particles and neutrons. Using an electrostatic linear accelerator at MIT, studies have been conducted to investigate the effects of high vacuum exposure on the sensitivity of CR-39 to fusion protons in the {approx}1-9 MeV energy range. High vacuum conditions, of order 10{sup -5} Torr, experienced by CR-39 samples at these facilities were emulated. It is shown that vacuum exposure times longer than {approx}16 h before proton irradiation result in a decrease in proton sensitivity, whereas no effect was observed for up to 67 h of vacuum exposure after proton irradiation. CR-39 sensitivity curves are presented for samples with prolonged exposure to high vacuum before and after proton irradiation.

Manuel, M. J.-E.; Rosenberg, M. J.; Sinenian, N.; Rinderknecht, H.; Zylstra, A. B.; Seguin, F. H.; Frenje, J.; Li, C. K.; Petrasso, R. D. [Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

2011-09-15T23:59:59.000Z

300

Effect of Acid Treatment on the High-Temperature Surface Oxidation Behavior of FeCrAlloy Foil Used for Methane Combustion Catalyst Support  

Science Journals Connector (OSTI)

The catalytic flameless combustion of low alkans improves the efficiency of energy production and reduces NOx emission. ... (3-5) Fe?Cr?Al alloy (FeCrAlloy) has superior stability to other iron-based alloys at high temperatures and has been used in the fabrication of gas burners, industrial heaters, and other high-temperature devices. ... The heating rate was 10 C/min. ...

Dong Zhang; Lihong Zhang; Bin Liang; Yongdan Li

2009-04-24T23:59:59.000Z

Note: This page contains sample records for the topic "ire cr eek" from the National Library of EnergyBeta (NLEBeta).
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301

Application of LaSr2Fe2CrO9-in Solid Oxide Fuel Cell Jacob M. Haag,a  

E-Print Network (OSTI)

Application of LaSr2Fe2CrO9- in Solid Oxide Fuel Cell Anodes Jacob M. Haag,a Brian D. Madsen composition LaSr2Fe2CrO9- was tested for application as an anode material for solid oxide fuel cells. Despite 28, 2008. Ni­yttria stabilized zirconia YSZ cermets are commonly used in solid oxide fuel cell SOFC

Poeppelmeier, Kenneth R.

302

Role of microbial exopolymeric substances (EPS) on chromium sorption and transport in heterogeneous subsurface soils: I. Cr(III) complexation with EPS in aqueous solution  

SciTech Connect

Chromium (III) binding by exopolymeric substances (EPS) isolated from Pseudomonas putida P18, Pseudomonas aeruginosa P16 and Pseudomonas stutzeri P40 strains were investigated by the determination of conditional stability constants and the concentration of functional groups using the ion-exchange experiments and potentiometric titrations. Spectroscopic (EXAFS) analysis was also used to obtain information on the nature of Cr(III) binding with EPS functional groups. The data from ion-exchange experiments and potentiometric titrations were evaluated using a non-electrostatic discrete ligand approach. The modeling results show that the acid/base properties of EPSs can be best characterized by invoking four different types of acid functional groups with arbitrarily assigned pK{sub a} values of 4, 6, 8 and 10. The analysis of ion-exchange data using the discrete ligand approach suggests that while the Cr binding by EPS from P. aeruginosa can be successfully described based on a reaction stoichiometry of 1:2 between Cr(III) and HL{sub 2} monoprotic ligands, the accurate description of Cr binding by EPSs extracted from P. putida and P. stutzeri requires postulation of 1:1 Cr(III)-ligand complexes with HL{sub 2} and HL{sub 3} monoprotic ligands, respectively. These results indicate that the carboxyl and/or phosphoric acid sites contribute to Cr(III) binding by microbial EPS, as also confirmed by EXAFS analysis performed in the current study. Overall, this study highlights the need for incorporation of Cr-EPS interactions into transport and speciation models to more accurately assess microbial Cr(VI) reduction and chromium transport in subsurface systems, including microbial reactive treatment barriers.

Kantar, C.; Dodge, C.; Demiray, H.; Dogan, N.M.

2011-01-26T23:59:59.000Z

303

Role of Microbial Exopolymeric Substances (EPS) on Chromium Sorption and Transport in Heterogeneous Subsurface Soils: I. Cr(III) Complexation with EPS in Aqueous Solution  

SciTech Connect

Chromium (III) binding by exopolymeric substances (EPS) isolated from Pseudomonas putida P18, Pseudomonas aeruginosa P16 and Pseudomonas stutzeri P40 strains were investigated by the determination of conditional stability constants and the concentration of functional groups using the ion-exchange experiments and potentiometric titrations. Spectroscopic (EXAFS) analysis was also used to obtain information on the nature of Cr(III) binding with EPS functional groups. The data from ion-exchange experiments and potentiometric titrations were evaluated using a non-electrostatic discrete ligand approach. The modeling results show that the acid/base properties of EPSs can be best characterized by invoking four different types of acid functional groups with arbitrarily assigned pK{sub a} values of 4, 6, 8 and 10. The analysis of ion-exchange data using the discrete ligand approach suggests that while the Cr binding by EPS from P. aeruginosa can be successfully described based on a reaction stoichiometry of 1:2 between Cr(III) and HL{sub 2} monoprotic ligands, the accurate description of Cr binding by EPSs extracted from P. putida and P. stutzeri requires postulation of 1:1 Cr(III)-ligand complexes with HL{sub 2} and HL{sub 3} monoprotic ligands, respectively. These results indicate that the carboxyl and/or phosphoric acid sites contribute to Cr(III) binding by microbial EPS, as also confirmed by EXAFS analysis performed in the current study. Overall, this study highlights the need for incorporation of Cr-EPS interactions into transport and speciation models to more accurately assess microbial Cr(VI) reduction and chromium transport in subsurface systems, including microbial reactive treatment barriers.

C Kantar; H Demiray; N Dogan; C Dodge

2011-12-31T23:59:59.000Z

304

Giant magnetoresistive structures based on CrO{sub 2} with epitaxial RuO{sub 2} as the spacer layer  

SciTech Connect

Epitaxial ruthenium dioxide (RuO{sub 2})/chromium dioxide(CrO{sub 2}) thin film heterostructures have been grown on (100)-TiO{sub 2} substrates by chemical vapor deposition. Both current-in-plane (CIP) and current-perpendicular-to-plane (CPP) giant magnetoresistive stacks were fabricated with either Co or another epitaxial CrO{sub 2} layer as the top electrode. The Cr{sub 2}O{sub 3} barrier, which forms naturally on CrO{sub 2} surfaces, is no longer present after the RuO{sub 2} deposition, resulting in a highly conductive interface that has a resistance at least four orders of magnitude lower. However, only very limited magnetoresistance (MR) was observed. Such low MR is due to the appearance of a chemically and magnetically disordered layer at the CrO{sub 2} and RuO{sub 2} interfaces when Cr{sub 2}O{sub 3} is transformed into rutile structures during its intermixing with RuO{sub 2}.

Miao, G.X.; Gupta, A.; Sims, H.; Butler, W.H.; Ghosh, S.; Xiao Gang [Physics Department, Brown University, Providence, Rhode Island 02912 (United States); Center for Materials for Information Technology, University of Alabama, Tuscaloosa, Alabama 35487 (United States); Department of Electrical and Computer Engineering, University of Illinois, Chicago, Illinois 60607 (United States); Physics Department, Brown University, Providence, Rhode Island 02912 (United States)

2005-05-15T23:59:59.000Z

305

Corrosion resistance of artificial passivation films of Fe[sub 2]O[sub 3]-Cr[sub 2]O[sub 3]-NiO formed by metalorganic chemical vapor deposition  

SciTech Connect

A series of thin Fe[sub 2]O[sub 3]-Cr[sub 2]O[sub 3]-NiO films were formed on Pt by an MOCVD technique using Fe(III), Cr(III), and Ni(II) acetylacetonate. The corrosion resistance of the films was examined in H[sub 2]SO[sub 4] and HCl by measuring the film thickness using ellipsometry and the chemical analysis of test solutions with ICPS. The dissolution rate of Fe[sub 2]O[sub 3]-Cr[sub 2]O[sub 3] composite films decreases exponentially with an increase in the cationic mass fraction of Cr[sup 3+] ions, X[sub Cr], of the films, and at the values of X[sub Cr] larger than 0.7 it becomes two orders of magnitude lower than that of Fe[sub 2]O[sub 3] films. The same type of changes in the dissolution rate with X[sub Cr] was observed for the NiO-Cr[sub 2]O[sub 3] composite films. Therefore, the addition of Cr[sub 2]O[sub 3] to Fe[sub 2]O[sub 3] and NiO films effectively improves the corrosion resistance. The addition of NiO to Fe[sub 2]O[sub 3]-Cr[sub 2]O[sub 3] composite films containing an adequate amount of Cr[sub 2]O[sub 3] does not bring an effective improvement in corrosion resistance. Therefore, the corrosion resistance of Fe[sub 2]O[sub 3]-Cr[sub 2]O[sub 3]-NiO composite films is determined primarily by the Cr[sub 2]O[sub 3] content of the films.

Sugimoto, Katsuhisa; Seto, Masahiro; Tanaka, Shigeaki; Hara, Nobuyoshi (Tohoku Univ., Sendai (Japan). Dept. of Metallurgy)

1993-06-01T23:59:59.000Z

306

Structural and Spectroscopic Characterization of 17- and 18-Electron Piano-Stool Complexes of Chromium. Thermochemical Analyses of Weak Cr-H Bonds  

SciTech Connect

The 17-electron radical CpCr(CO)2(IMe) (IMe = 1,3-dimethylimidazol-2-ylidene) was synthesized by the reaction of IMe with [CpCr(CO)3]2, and characterized by single crystal X-ray diffraction and by EPR, IR and variable temperature 1H NMR spectroscopy. The metal-centered radical is monomeric under all conditions and exhibits Curie paramagnetic behavior in solution. An electrochemically reversible reduction to 18-electron CpCr(CO)2(IMe)? takes place at E = ?1.89(1) V vs Cp2Fe+/0 in MeCN, and was accomplished chemically with KC8 in THF. The salts K+(18-crown-6)[CpCr(CO)2(IMe)]? THF and K+[CpCr(CO)2(IMe)]? THF were crystallographically characterized. Monomeric ion pairs are found in the former, whereas the latter has a polymeric structure due to a network of K???O(CO) interactions. Protonation of K+(18-crown-6)[CpCr(CO)2(IMe)]? THF gives the hydride CpCr(CO)2(IMe)H, which could not be isolated, but was characterized in solution; a pKa of 27.2(4) was determined in MeCN. A thermochemical analysis provides the Cr-H bond dissociation free energy (BDFE) for CpCr(CO)2(IMe)H in MeCN solution as 47.3(6) kcal mol?1. This value is exceptionally low for a transition metal hydride, and implies that the reaction 2 [Cr-H] ? 2 [Cr] + H2 is exergonic (?G = ?9.0(8) kcal mol?1). This analysis explains the experimental observation that generated solutions of the hydride produce CpCr(CO)2(IMe) (typically on the timescale of days). By contrast, CpCr(CO)2(PCy3)H has a higher Cr-H BDFE (52.9(4) kcal mol?1), is more stable with respect to H2 loss, and is isolable. We thank the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences and Biosciences for support. M.L.H. carried out the crystallographic studies and was supported as part of the Center for Molecular Electrocatalysis, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences. The EPR studies were performed at the William R. Wiley Environmental Molecular Sciences Laboratory (EMSL), a national scientific user facility sponsored by the Department of Energys Office of Biological and Environmental Research located at PNNL. Pacific Northwest National Laboratory is a multiprogram national laboratory operated by Battelle for the U.S. Department of Energy.

van der Eide, Edwin F.; Helm, Monte L.; Walter, Eric D.; Bullock, R. Morris

2013-02-04T23:59:59.000Z

307

Regulation of Ire1 kinase and nuclease activity during the unfolded protein response  

E-Print Network (OSTI)

M.J. and J. Sambrook, Protein folding in the cell. Nature,chaperones and other protein folding enzymes to help restorerecovery of the ER protein folding capacity. In contrast,

Chawla, Aditi

2008-01-01T23:59:59.000Z

308

Endoplasmic Reticulum Stress Sensor IRE1 alpha Preserves Function of the Stressed Myocardium  

E-Print Network (OSTI)

Dunn AD, Ruddock LW. Protein folding: a missing redox link4(11). Ron D, Harding HP. Protein-folding homeostasis in the4). Therefore, preceise protein folding and maturation are

Steiger, DeAnna

2013-01-01T23:59:59.000Z

309

Endoplasmic Reticulum Stress Sensor IRE1 alpha Preserves Function of the Stressed Myocardium  

E-Print Network (OSTI)

the biotech and pharmaceutical industries ? Established anwith 25 biotech and pharmaceutical industry leaders ? Ledof the Pharmaceutical and Healthcare Industries. High

Steiger, DeAnna

2013-01-01T23:59:59.000Z

310

Characterization of mRNA splicing factors : ASF/SF2 and Ire1p  

E-Print Network (OSTI)

treated with 0.01 units of CIP (NEB) in presence of 10X NEBIntestinal Phosphatase (CIP), confirming that the differentwt). The species obtained upon CIP treatment of the extract

Chakrabarti, Sutapa

2007-01-01T23:59:59.000Z

311

Modeling of an Integrated Renewable Energy System (Ires) with Hydrogen Storage.  

E-Print Network (OSTI)

??The purpose of the study was to consider the integration of hydrogen storage technology as means of energy storage with renewable sources of energy. Hydrogen (more)

Shenoy, Navin Kodange

2010-01-01T23:59:59.000Z

312

Communication in the Presence of Noise CLAUDE E. SHANNON, MEMBER, IRE  

E-Print Network (OSTI)

of transmission of binary digits over a system when the signal is perturbed by various types of noise. Some: This operates on the message in some way and produces a signal suitable for transmission to the receiving point of wires, a coaxial cable, a band of radio frequencies, etc. During transmission, or at the receiving

Gummadi, Ramakrishna

313

Prediction and Monitoring Systems of Creep-Fracture Behavior of 9Cr-1Mo Steels for Teactor Pressure Vessels  

SciTech Connect

A recent workshop on next-generation nuclear plant (NGNP) topics underscored the need for research studies on the creep fracture behavior of two materials under consideration for reactor pressure vessel (RPV) applications: 9Cr-1Mo and SA-5XX steels. This research project will provide a fundamental understanding of creep fracture behavior of modified 9Cr-1Mo steel welds for through modeling and experimentation and will recommend a design for an RPV structural health monitoring system. Following are the specific objectives of this research project: Characterize metallurgical degradation in welded modified 9Cr-1Mo steel resulting from aging processes and creep service conditions. Perform creep tests and characterize the mechanisms of creep fracture process. Quantify how the microstructure degradation controls the creep strength of welded steel specimens. Perform finite element (FE) simulations using polycrystal plasticity to understand how grain texture affects the creep fracture properties of welds. Develop a microstructure-based creep fracture model to estimate RPVs service life . Manufacture small, prototypic, cylindrical pressure vessels, subject them to degradation by aging, and measure their leak rates. Simulate damage evolution in creep specimens by FE analyses. Develop a model that correlates gas leak rates from welded pressure vessels with the amount of microstructural damage. Perform large-scale FE simulations with a realistic microstructure to evaluate RPV performance at elevated temperatures and creep strength. Develop a fracture model for the structural integrity of RPVs subjected to creep loads. Develop a plan for a non-destructive structural health monitoring technique and damage detection device for RPVs.

Potirniche, Gabriel; Barlow, Fred D.; Charit, Indrajit; Rink, Karl

2013-11-26T23:59:59.000Z

314

CANTON LAKESHORE CANTON E BEST CON NEAUT GIDD INGS EAST N ELLSWORT  

U.S. Energy Information Administration (EIA) Indexed Site

MCKEESPORT MCKEESPORT COR AOPOLIS-MOON REDHAW ST. CLAIR SC ROGGSFIELD FRANKLIN -OAK FOREST RIMERSBURG RENNERD AL E GREENVILL E PAT MOS CRABTR EE BLAC K ASH ROYALT ON N BAKERSTOWN QUEEN ROU GH RUN LUCAS BLAC K H ILL CRESTON WAT TSVILLE WADSWORTH -NORT H OAKLAN D HOM EWORT H UNIT Y ESSELBRUN ALAMED A PAR K-CROOKED RU CHERRY GROVE FRENC HTOWN ST EWART RUN MILL C REEK GLENF IELD-MOU NT NEBO HICKORY E HARRISVILLE E LEST ER GRIGGS CORNERS EN GLAN D WEST VIL LE LAKE BAILEY LAKE OAKFORD BR UNSWICK N HOR ACE WALBORN RESERVOIR YOUN GSVILLE RPD-LORAIN -1 INGOMAR-GRUBBS BIG MEADOWS GARD EN ISLE TURT LE CREEK LEWIST ON E BR USH CR EEK FOOT VILLE BU LL CREEK BESSEMER EAGLEVILLE LIVER POOL E RIDGEVILLE E EVANS CIT Y GUIT ONVILLE WOLF S COR NERS WIN DFALL ABBEYVILLE ROC K CAMP LEATH ER WOOD AR COLA CR EEK MEC HANICST OWN NINE MILE RU N WALKCHALK RENFR EW-MCCALMONT BU FFALO N VALENCIA WELLIN GT ON

315

Application of USNRC NUREG/CR-6661 and draft DG-1108 to evolutionary and advanced reactor designs  

SciTech Connect

For the seismic design of evolutionary and advanced nuclear reactor power plants, there are definite financial advantages in the application of USNRC NUREG/CR-6661 and draft Regulatory Guide DG-1108. NUREG/CR-6661, 'Benchmark Program for the Evaluation of Methods to Analyze Non-Classically Damped Coupled Systems', was by Brookhaven National Laboratory (BNL) for the USNRC, and Draft Regulatory Guide DG-1108 is the proposed revision to the current Regulatory Guide (RG) 1.92, Revision 1, 'Combining Modal Responses and Spatial Components in Seismic Response Analysis'. The draft Regulatory Guide DG-1108 is available at http://members.cox.net/apolloconsulting, which also provides a link to the USNRC ADAMS site to search for NUREG/CR-6661 in text file or image file. The draft Regulatory Guide DG-1108 removes unnecessary conservatism in the modal combinations for closely spaced modes in seismic response spectrum analysis. Its application will be very helpful in coupled seismic analysis for structures and heavy equipment to reduce seismic responses and in piping system seismic design. In the NUREG/CR-6661 benchmark program, which investigated coupled seismic analysis of structures and equipment or piping systems with different damping values, three of the four participants applied the complex mode solution method to handle different damping values for structures, equipment, and piping systems. The fourth participant applied the classical normal mode method with equivalent weighted damping values to handle differences in structural, equipment, and piping system damping values. Coupled analysis will reduce the equipment responses when equipment, or piping system and structure are in or close to resonance. However, this reduction in responses occurs only if the realistic DG-1108 modal response combination method is applied, because closely spaced modes will be produced when structure and equipment or piping systems are in or close to resonance. Otherwise, the conservatism in the current Regulatory Guide 1.92, Revision 1, will overshadow the advantage of coupled analysis. All four participants applied the realistic modal combination method of DG-1108. Consequently, more realistic and reduced responses were obtained. (authors)

Chang 'Apollo', Chen [Apollo Consulting, Inc., Surprise, AZ 85374-4605 (United States)

2006-07-01T23:59:59.000Z

316

Corrections and additions to the User's Guide for SNAP (NUREG/CR-1245, SAND80-0315). [BSTAT  

SciTech Connect

This document contains corrections and additions to the User's Guide for SNAP (NUREG/CR-1245, SAND80-0315). These update the SNAP report so that it documents the most current version of SNAP. An additional program, BATLE Statistics (BSTAT), is described here. It provides a post-processing capability to analyze engagement data from SNAP simulations. The work documented by this report was performed by Pritsker and Associates, Inc., under contract to Sandia National Laboratories for the US Nuclear Regulatory Commission's Office of Nuclear Regulatory Research and the US Naval Surface Weapons Center.

Polito, J.

1982-03-01T23:59:59.000Z

317

Intracavity laser spectroscopy with a semiconductor disk laser-pumped cw Cr{sup 2+} : ZnSe laser  

SciTech Connect

Absorption spectra of the air have been measured near 2.31 ?m using intracavity laser spectroscopy with a semiconductor disk laser-pumped cw Cr{sup 2+} : ZnSe laser. It is shown that, at lasing times of at least 3 ms, the sensitivity of the laser to intracavity absorption increases. This allows one to reach an effective path length of 900 km and enables detection of weak lines with absorption coefficients down to 1 10{sup -9} cm{sup -1}. (laser spectroscopy)

Kozlovsky, V I; Korostelin, Yu V; Podmar'kov, Yu P; Skasyrsky, Ya K; Frolov, M P [P N Lebedev Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation); Okhotnikov, O G [Optoelectronics Research Center, Tampere University of Technology, Tampere (Finland); Akimov, V A [Moscow Institute of Physics and Technology (State University), Dolgoprudnyi, Moscow Region (Russian Federation)

2013-09-30T23:59:59.000Z

318

Microstructural aspects of low-pressure plasma-sprayed CoNiCrAlY coating on Hastelloy X  

SciTech Connect

A Co-32Ni-21Cr-8Al-0.5Y alloy coating plasma sprayed on Hastelloy X. The microstructure of the coating layer consist of ..gamma.. phase solid solution, ..gamma..' phase, and Y-rich intermetallic phase. This coating exhibits excellent oxidation and sulfidation resistance after exposure in air and in sodium sulfate at 1,000/sup 0/C for 60 h, due to the formation of ..cap alpha..-Al/sub 2/O/sub 3/ oxide scale. However, the presence of chloride in the sodium sulfate leads to rupture of the aluminium oxide scale, and this results in the precipitation of chlorides and sulfides within the coating layer.

Tjong, S.C.; Shih, G.E.; Ho, N.J.

1989-01-01T23:59:59.000Z

319

Investigation on the magnetically diluted spinels CdIn2?2xCr2xS4  

Science Journals Connector (OSTI)

The cation distribution of the solid solution CdCr2xIn2?2xS4 was determined by Mssbauer spectroscopy on 5 7Fe doped samples. At high temperature the susceptibility follows a Curie?Weiss law. The low temperature field dependence of the magnetization shows that the samples 0.90?x?0.98 are ferromagnetic. In the range 0.25?x?0.98 irreversible behaviour remanent and time dependent magnetization are observed. Magnetization and EPR results on the sample x=0.60 are consistent with the spin glass behaviour found by dc susceptibilitymeasurements.

M. Nogues; A. Saifi; M. Hamedoun; J. L. Dormann; A. Malmanche; D. Fiorani; S. Viticoli

1982-01-01T23:59:59.000Z

320

Facile additive-free synthesis of iron oxide nanoparticles for efficient adsorptive removal of Congo red and Cr(VI)  

Science Journals Connector (OSTI)

Abstract The iron oxide nanoparticles had been successfully synthesized via an additive-free hydrolysis process at 75C for 12h. The product was characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and N2 adsorptiondesorption. The results of XRD and N2 adsorptiondesorption demonstrated that the as-prepared product was mainly ?-Fe2O3 with a large surface area of 164.1m2g?1. The TEM images illustrated that the as-prepared product was found to consist of a mixture of irregular spherical nanoparticles (a diameter of ?50nm) and nanowhiskers (a diameter of ?50nm and uneven length). The as-prepared product was used to investigate its promising applications in water treatment. Due to its small size and large surface area, the maximum adsorption capacities of Congo red and Cr(VI) have been determined using the Langmuir equation and found to reach up to 253.8 and 17.0mgg?1, respectively. The facile synthesis method and the superior adsorption performance derived from the iron oxide nanoparticles display the potential applications for the removal of Congo red and Cr(VI) from aqueous solution.

Tao Hao; Chao Yang; Xuehui Rao; Jide Wang; Chunge Niu; Xintai Su

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ire cr eek" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Deformation behavior of laser welds in high temperature oxidation resistant FeCrAl alloys for fuel cladding applications  

Science Journals Connector (OSTI)

Abstract Ferritic-structured FeCrAl alloys are being developed and show promise as oxidation resistant accident tolerant light water reactor fuel cladding. This study focuses on investigating the weldability and post-weld mechanical behavior of three model alloys in a range of Fe(1317.5)Cr(34.4)Al (wt.%) with a minor addition of yttrium using modern laser-welding techniques. A detailed study on the mechanical performance of bead-on-plate welds using sub-sized, flat dog-bone tensile specimens and digital image correlation (DIC) has been carried out to determine the performance of welds as a function of alloy composition. Results indicated a reduction in the yield strength within the fusion zone compared to the base metal. Yield strength reduction was found to be primarily constrained to the fusion zone due to grain coarsening with a less severe reduction in the heat affected zone. For all proposed alloys, laser welding resulted in a defect free weld devoid of cracking or inclusions.

Kevin G. Field; Maxim N. Gussev; Yukinori Yamamoto; Lance L. Snead

2014-01-01T23:59:59.000Z

322

Mechanical Properties, sliding wear and solid particle erosion behaviors of plasma enhanced magnetron sputtering CrSiCN coating Systems  

Science Journals Connector (OSTI)

Abstract CrSiCN coating systems with different concentrations of Cr, Si, C, and N were investigated for their microstructure, mechanical properties (hardness H, elastic modulus E and indentation fracture toughness KIC) and tribological behaviors using SEM, nano-indentation, indentation, pin-on-disk wear test, and sand particle erosion test. The wear behaviors, such as specific wear rate and Archard wear coefficient, showed inverse relationships with H3/E2 ratio, confirming that the resistance to plastic deformation is the essential factor governing sliding wear behavior. High H3/E2 ratios also contributed to increased resistances to erosion at low impingement angles. However, at higher impingement angles (>60), coatings with lower index of brittleness (B=2.656m?1/2), higher critical load (P?=6.670N) for crack initiation and fracture surface energy (?f=0.123 Jm?2) offered a higher erosion resistance. The indentation fracture toughness (KIC), hardness (H) and elastic modulus (E) are limited to interpret erosion behaviors in a comprehensive approach, suggesting that erosion is a complex process where multiple mechanical properties contribute to erosion performance.

Feng Cai; Xiao Huang; Qi Yang

2014-01-01T23:59:59.000Z

323

Role of Triple Phonon Excitations on Large Angle Quasi-elastic Scattering of {sup 54}Cr+{sup 208}Pb System  

SciTech Connect

We study the large angle quasi-elastic scattering of {sup 54}Cr+{sup 208}Pb system in terms of the full-order coupled-channels formalism. We especially investigate the role of single, double and triple phonon excitations on quasi-elastic scattering cross section as well as quasi-elastic barrier distribution of this system for which the experimental data have been measured. It is shown that the triple phonon excitations both in {sup 54}Cr and {sup 208}Pb nuclei seem to be needed by the present coupled-channels calculations in order to reproduce the experimental data of quasi-elastic cross section and barrier distribution for the {sup 54}Cr+{sup 208}Pb system. We also show that the standard value of the surface diffuseness parameter for the nuclear potential a = 0.63 fm, is preferred by the experimental quasi-elastic scattering data for this system.

Zamrun, Muhammad F. [Department of Physics, University of Malaya, Kuala Lumpur 50603 (Malaysia); Jurusan Fisika FMIPA, Universitas Haluoleo, Kendari, Sulawesi Tenggara 93232 (Indonesia); Kasim, Hasan Abu [Department of Physics, University of Malaya, Kuala Lumpur 50603 (Malaysia)

2011-03-30T23:59:59.000Z

324

Comparative Study on the Corrosion Resistance of Fe-Based Amorphous Metal, Borated Stainless Steel and Ni-Cr-Mo-Gd Alloy  

SciTech Connect

Iron-based amorphous alloy Fe{sub 49.7}Cr{sub 17.7}Mn{sub 1.9}Mo{sub 7.4}W{sub 1.6}B{sub 15.2}C{sub 3.8}Si{sub 2.4} was compared to borated stainless steel and Ni-Cr-Mo-Gd alloy on their corrosion resistance in various high-concentration chloride solutions. The melt-spun ribbon of this iron-based amorphous alloy have demonstrated a better corrosion resistance than the bulk borated stainless steel and the bulk Ni-Cr-Mo-Gd alloy, in high-concentration chloride brines at temperatures 90 deg. C or higher. (authors)

Lian, Tiangan; Day, Daniel; Hailey, Phillip; Choi, Jor-Shan; Farmer, Joseph [Lawrence Livermore National Laboratory, Livermore, CA, 94550 (United States)

2007-07-01T23:59:59.000Z

325

Fragmentation cross sections of Fe^{26+}, Si^{14+} and C^{6+} ions of 0.3-10 A GeV on polyethylene, CR39 and aluminum targets  

E-Print Network (OSTI)

We present new measurements of the total and partial fragmentation cross sections in the energy range 0.3-10 A GeV of 56Fe, 28Si and 12C beams on polyethylene, CR39 and aluminum targets. The exposures were made at BNL, USA and HIMAC, Japan. The CR39 nuclear track detectors were used to identify the incident and survived beams and their fragments. The total fragmentation cross sections for all targets are almost energy independent while they depend on the target mass. The measured partial fragmentation cross sections are also discussed.

Cecchini, S; Giacomelli, G; Giorgini, M; Kumar, A; Mandrioli, G; Manzoor, S; Margiotta, A R; Medinaceli, E; Patrizii, L; Popa, V; Qureshi, I E; Sirri, G; Spurio, M; Togo, V

2008-01-01T23:59:59.000Z

326

Fragmentation cross sections of Fe^{26+}, Si^{14+} and C^{6+} ions of 0.3-10 A GeV on CR39, polyethylene and aluminum targets  

E-Print Network (OSTI)

New measurements of the total and partial fragmentation cross sections in the energy range 0.3-10 A GeV of Fe^{26+}, Si^{14+} and C^{6+} beams on polyethylene, CR39 and aluminum targets are presented. The exposures were made at Brookhaven National Laboratory (BNL), USA, and Heavy Ion Medical Accelerator in Chiba (HIMAC), Japan. The CR39 nuclear track detectors were used to identify the incident and survived beams and their fragments. The total fragmentation cross sections for all targets are almost energy independent while they depend on the target mass. The measured partial fragmentation cross sections are also discussed.

Miriam Giorgini

2008-12-01T23:59:59.000Z

327

Fragmentation cross sections of Fe^{26+}, Si^{14+} and C^{6+} ions of 0.3-10 A GeV on polyethylene, CR39 and aluminum targets  

E-Print Network (OSTI)

We present new measurements of the total and partial fragmentation cross sections in the energy range 0.3-10 A GeV of 56Fe, 28Si and 12C beams on polyethylene, CR39 and aluminum targets. The exposures were made at BNL, USA and HIMAC, Japan. The CR39 nuclear track detectors were used to identify the incident and survived beams and their fragments. The total fragmentation cross sections for all targets are almost energy independent while they depend on the target mass. The measured partial fragmentation cross sections are also discussed.

S. Cecchini; T. Chiarusi; G. Giacomelli; M. Giorgini; A. Kumar; G. Mandrioli; S. Manzoor; A. R. Margiotta; E. Medinaceli; L. Patrizii; V. Popa; I. E. Qureshi; G. Sirri; M. Spurio; V. Togo

2008-01-21T23:59:59.000Z

328

Fragmentation cross sections of Fe^{26+}, Si^{14+} and C^{6+} ions of 0.3-10 A GeV on CR39, polyethylene and aluminum targets  

E-Print Network (OSTI)

New measurements of the total and partial fragmentation cross sections in the energy range 0.3-10 A GeV of Fe^{26+}, Si^{14+} and C^{6+} beams on polyethylene, CR39 and aluminum targets are presented. The exposures were made at Brookhaven National Laboratory (BNL), USA, and Heavy Ion Medical Accelerator in Chiba (HIMAC), Japan. The CR39 nuclear track detectors were used to identify the incident and survived beams and their fragments. The total fragmentation cross sections for all targets are almost energy independent while they depend on the target mass. The measured partial fragmentation cross sections are also discussed.

Giorgini, Miriam

2008-01-01T23:59:59.000Z

329

Measurement of the energy resolution and calibration of hybrid pixel detectors with GaAs:Cr sensor and Timepix readout chip  

E-Print Network (OSTI)

This paper describes an iterative method of per-pixel energy calibration of hybrid pixel detectors with GaAs:Cr sensor and Timepix readout chip. A convolution of precisely measured spectra of characteristic X-rays of different metals with the resolution and the efficiency of the pixel detector is used for the calibration. The energy resolution of the detector is also measured during the calibration. The use of per-pixel calibration allows to achieve a good energy resolution of the Timepix detector with GaAs:Cr sensor: 8% and 13% at 60 keV and 20 keV, respectively.

Butler, A P; Bell, S T; Chelkov, G A; Dedovich, D V; Demichev, M A; Elkin, V G; Gostkin, M I; Kotov, S A; Kozhevnikov, D A; Kruchonak, U G; Nozdrin, A A; Porokhovoy, S Yu; Potrap, I N; Smolyanskiy, P I; Zakhvatkin, M M; Zhemchugov, A S

2015-01-01T23:59:59.000Z

330

ELECTRON-IMPACT EXCITATION OF Cr II: A THEORETICAL CALCULATION OF EFFECTIVE COLLISION STRENGTHS FOR OPTICALLY ALLOWED TRANSITIONS  

SciTech Connect

In this paper, we present electron-impact excitation collision strengths and Maxwellian averaged effective collision strengths for the complicated iron-peak ion Cr II. We consider specifically the allowed lines for transitions from the 3d {sup 5} and 3d {sup 4}4s even parity configuration states to the 3d {sup 4}4p odd parity configuration levels. The parallel suite of R-Matrix packages, RMATRX II, which have recently been extended to allow for the inclusion of relativistic effects, were used to compute the collision cross sections. A total of 108 LS{pi}/280 J{pi} levels from the basis configurations 3d {sup 5}, 3d {sup 4}4s, and 3d {sup 4}4p were included in the wavefunction representation of the target including all doublet, quartet, and sextet terms. Configuration interaction and correlation effects were carefully considered by the inclusion of seven more configurations and a pseudo-corrector 4d-bar type orbital. The 10 configurations incorporated into the Cr II model thus listed are 3d {sup 5}, 3d {sup 4}4s, 3d {sup 4}4p, 3d {sup 3}4s {sup 2}, 3d {sup 3}4p {sup 2}, 3d {sup 3}4s4p, 3d{sup 4}4d-bar, 3d{sup 3}4s4d-bar, 3d{sup 3}4p4d-bar, and 3d{sup 3}4d-bar{sup 2}, constituting the largest Cr II target model considered to date in a scattering calculation. The Maxwellian averaged effective collision strengths are computed for a wide range of electron temperatures 2000-100,000 K which are astrophysically significant. Care has been taken to ensure that the partial wave contributions to the collision strengths for these allowed lines have converged with 'top-up' from the Burgess-Tully sum rule incorporated. Comparisons are made with the results of Bautista et al. and significant differences are found for some of the optically allowed lines considered.

Wasson, I. R.; Ramsbottom, C. A.; Scott, M. P., E-mail: iwasson01@qub.ac.uk [Department of Applied Mathematics and Theoretical Physics, Queen's University, Belfast (United Kingdom)

2011-10-01T23:59:59.000Z

331

Spatial distribution and magnetism in poly-Cr-doped GaN from first principles X. Y. Cui,1 J. E. Medvedeva,2 B. Delley,3 A. J. Freeman,4 and C. Stampfl1  

E-Print Network (OSTI)

Spatial distribution and magnetism in poly-Cr-doped GaN from first principles X. Y. Cui,1 J. E the spatial distribution and magnetic coupling of Cr-doped GaN, in which exhaustive structural and magnetic direct evidence that the distribution of the doped magnetic ions is neither homogeneous nor random

Medvedeva, Julia E.

332

BlobCR: Virtual disk based checkpoint-restart for HPC applications on IaaS clouds  

NLE Websites -- All DOE Office Websites (Extended Search)

Parallel Distrib. Comput. 73 (2013) 698-711 Contents lists available at SciVerse ScienceDirect J. Parallel Distrib. Comput. journal homepage: www.elsevier.com/locate/jpdc BlobCR: Virtual disk based checkpoint-restart for HPC applications on IaaS clouds Bogdan Nicolae a,∗ , Franck Cappello b,c a IBM Research, Ireland b INRIA Saclay, France c University of Illinois at Urbana-Champaign, United States a r t i c l e i n f o Article history: Received 9 August 2012 Received in revised form 28 December 2012 Accepted 22 January 2013 Available online 1 February 2013 Keywords: IaaS clouds High performance computing Checkpoint-restart Fault tolerance Virtual disk snapshots Rollback of filesystem changes a b s t r a c t Infrastructure-as-a-Service (IaaS) cloud computing is gaining significant interest in industry and academia as an alternative platform for running HPC applications.

333

Effect of composition changes on the structure and properties of W-Cr-Ni-C detonation gun coatings  

SciTech Connect

Changes in the microstructure and wear behavior of W-Cr-Ni-C coatings as a function of the composition of the starting powder were studied. The experimental powder compositions were chosen so that the results could be analyzed statistically as a mixture problem with the extreme vertices design. All coatings were deposited by identical detonation gun operating conditions. Although the variation of powder chemistry resulted in distinctively different powder morphologies, all coatings were found to be composed of the same 4 (possibly more) complex carbides. The amount and, to some degree, morphology of a particular carbide was found to change with composition. However, neither amount nor morphology could be correlated to microhardness or wear test results. Predictive equations based on powder composition were obtained which fit the wear test results very well.

Stavros, A.J. [Praxair Surface Technologies Inc., Indianapolis, IN (United States)

1995-12-31T23:59:59.000Z

334

Stability of the L1{sub 2} phase at 800 C in the Ti-Al-Cr system  

SciTech Connect

Interest in the L1{sub 2} phase, in the Ti-Al-Cr ternary system, continues due to the search for enhanced mechanical properties in light weight materials for possible structural applications. Additionally, recent work has indicated that alloys based in part on this phase may find use as protective alumina-forming coatings for {gamma}-based titanium-aluminides. In order to aid in the development of structural materials and coatings, the actual phase equilibria must be determined so that the correct processing schemes may be designed. Towards this end, the present work seeks to clarify some of the confusion pertaining to the phase equilibria of the L1{sub 2} phase.

Jewett, T.J.; Ahrens, B. [GKSS Research Centre, Geesthacht (Germany)] [GKSS Research Centre, Geesthacht (Germany); Dahms, M. [FH-Flensburg (Germany)] [FH-Flensburg (Germany)

1996-02-01T23:59:59.000Z

335

Towards consistent chronology in the early Solar System: high resolution 53Mn-53Cr chronometry for chondrules.  

SciTech Connect

New high-precision {sup 53}Mn-{sup 53}Cr data obtained for chondrules extracted from a primitive ordinary chondrite, Chainpur (LL3.4), define an initial {sup 53}Mn/{sup 55}Mn ratio of (5.1 {+-} 1.6) x 10{sup -6}. As a result of this downward revision from an earlier higher value of (9.4 {+-} 1.7) x 10{sup -6} for the same meteorite (Nyquist et al. 2001), together with an assessment of recent literature, we show that a consistent chronology with other chronometers such as the {sup 26}Al-{sup 26}Mg and {sup 207}Pb-{sup 206}Pb systems emerges in the early Solar System.

Yin, Q; Jacobsen, B; Moynier, F; Hutcheon, I D

2007-05-02T23:59:59.000Z

336

Fe-Cr-Mo based ODS alloys via spark plasma sintering: A combinational characterization study by TEM and APT  

SciTech Connect

Nanoscale oxides play an important role in oxide dispersion strengthened (ODS) alloys for improved high temperature creep resistance and enhanced radiation damage tolerance. In this study, transmission electron microscopy (TEM) and atom probe tomography (APT) were combined to investigate two novel Fe-16Cr-3Mo (wt.%) based ODS alloys. Spark plasma sintering (SPS) was used to consolidate the ODS alloys from powders that were milled with 0.5 wt.% Y2O3 powder only or with Y2O3 powder and 1 wt.% Ti. TEM characterization revealed that both alloys have a bimodal structure of nanometer-size (~ 100 500 nm) and micron-size grains with nanostructured oxide precipitates formed along and close to grain boundaries with diameters ranging from five to tens of nanometers. APT provides further quantitative analyses of the oxide precipitates, and also reveals Mo segregation at grain boundaries next to oxide precipitates. The alloys with and without Ti are compared based on their microstructures.

Y. Q. Wu; K. N. Allahar; J. Burns; B. Jacques; I Charit; D. P. Butt; J. I. Cole

2013-08-01T23:59:59.000Z

337

Nano and picosecond magnetization dynamics of weakly coupled CoFe/Cr/NiFe trilayers studied by a multitechnique approach  

Science Journals Connector (OSTI)

We present results on the magnetization dynamics in heterostructures of the CoFe/Cr/NiFe type. We have employed a combination of different layer-selective methods covering a broad range from quasistatic hysteresis measurements by x-ray magnetic circular dichroism (XMCD), over time-resolved photoemission electron microscopy (PEEM) at subnanosecond timescales to high-frequency ferromagnetic resonance (FMR) experiments. With increasing driving frequency, we found a different influence of the coupling between the two ferromagnetic layers on the dynamic behavior. Employing the spatial resolution of the PEEM method, we have been able to discern various dynamic responses in different regions of the sample that could be attributed to magnetodynamic processes with a different degree of coupling. In conjunction with the complementary FMR and XMCD measurements, we attribute the inhomogeneous influence of interlayer coupling to a shift from domain-wall-motion-dominated dynamics at low frequencies to precession-dominated dynamics at higher frequencies.

A. M. Kaiser; C. Schppner; F. M. Rmer; C. Hassel; C. Wiemann; S. Cramm; F. Nickel; P. Grychtol; C. Tieg; J. Lindner; C. M. Schneider

2011-10-10T23:59:59.000Z

338

Lightest Isotope of Bh Produced Via the 209Bi(52Cr,n)260BhReaction  

SciTech Connect

The lightest isotope of Bh known was produced in the new {sup 209}Bi({sup 52}Cr,n){sup 260}Bh reaction at the Lawrence Berkeley National Laboratory's 88-Inch Cyclotron. Positive identification was made by observation of eight correlated alpha particle decay chains in the focal plane detector of the Berkeley Gas-Filled Separator. {sup 260}Bh decays with a 35{sub -9}{sup +19} ms half-life by alpha particle emission mainly by a group at 10.16 MeV. The measured cross section of 59{sub -20}{sup +29} pb is approximately a factor of four larger than compared to recent model predictions. The influences of the N = 152 and Z = 108 shells on alpha decay properties are discussed.

Nelson, Sarah L.; Gregorich, Kenneth E.; Dragojevic, Irena; Garcia, Mitch A.; Gates, Jacklyn M.; Sudowe, Ralf; Nitsche, Heino

2007-05-07T23:59:59.000Z

339

Thermally activated dislocation creep model for primary water stress corrosion cracking of NiCrFe alloys  

SciTech Connect

There is a growing awareness that awareness that environmentally assisted creep plays an important role in integranular stress corrosion cracking (IGSCC) of NiCrFe alloys in the primary coolant water environment of a pressurized water reactor (PWR). The expected creep mechanism is the thermally activated glide of dislocations. This mode of deformation is favored by the relatively low temperature of PWR operation combined with the large residual stresses that are most often identified as responsible for the SCC failure of plant components. Stress corrosion crack growth rate (CGR) equations that properly reflect the influence of this mechanism of crack tip deformation are required for accurate component life predictions. A phenomenological IGSCC-CGR model, which is based on an apriori assumption that the IGSCC-CGR is controlled by a low temperature dislocation creep mechanism, is developed in this report. Obstacles to dislocation creep include solute atoms such as carbon, which increase the lattice friction force, and forest dislocations, which can be introduced by cold prestrain. Dislocation creep also may be environmentally assisted due to hydrogen absorption at the crack tip. The IGSCC-CGR model developed here is based on an assumption that crack growth occurs by repeated fracture events occurring within an advancing crack-tip creep-fracture zone. Thermal activation parameters for stress corrosion cracking are obtained by fitting the CGR model to IGSCC-CGR data obtained on NiCrFe alloys, Alloy X-750 and Alloy 600. These IGSCC-CGR activation parameters are compared to activation parameters obtained from creep and stress relaxation tests. Recently reported CGR data, which exhibit an activation energy that depends on yield stress and the applied stress intensity factor, are used to benchmark the model. Finally, the effects of matrix carbon concentration, grain boundary carbides and absorbed hydrogen concentration are discussed within context of the model.

Hall, M.M., Jr

1995-12-31T23:59:59.000Z

340

Published: December 28, 2011 r 2011 American Chemical Society 724 dx.doi.org/10.1021/cr2003272 |Chem. Rev. 2012, 112, 724781  

E-Print Network (OSTI)

large- scale industrial implementation. Thus, carbon capture and sequestration (CCS) technologies |Chem. Rev. 2012, 112, 724­781 REVIEW pubs.acs.org/CR Carbon Dioxide Capture in Metal?Organic Frameworks 94720-1460, United States CONTENTS 1. Introduction 724 1.1. Carbon Dioxide Emission from Anthropogenic

Note: This page contains sample records for the topic "ire cr eek" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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341

LONG-TERM OPTICAL OBSERVATIONS OF TWO LMXBs: UW CrB (=MS 1603+260) AND V1408 Aql (=4U 1957+115)  

SciTech Connect

We present new optical photometry of two low-mass X-ray binary stars, UW CrB (MS 1603+260) and V1408 Aql (4U 1957+115). UW CrB is an eclipsing binary and we refine its eclipse ephemeris and measure an upper limit to the rate of change of its orbital period, | P-dot | < 4.2 Multiplication-Sign 10{sup -11} (unitless). The light curve of UW CrB shows optical counterparts of type I X-ray bursts. We tabulate the times, orbital phases, and fluences of 33 bursts and show that the optical flux in the bursts comes primarily from the accretion disk, not from the secondary star. The new observations are consistent with a model in which the accretion disk in UW CrB is asymmetric and precesses in the prograde direction with a period of {approx}5.5 days. The light curve of V1408 Aql has a low-amplitude modulation at its 9.33 hr orbital period. The modulation remained a nearly pure sine curve in the new data as it was in 1984 and 2008, but its mean amplitude was lower, 18% against 23% in the earlier data. A model in which the orbital modulation is caused by the varying aspect of the heated face of the secondary star continues to give an excellent fit to the light curve. We derive a much improved orbital ephemeris for the system.

Mason, Paul A. [Department of Physics, University of Texas at El Paso, El Paso, TX 79968 (United States); Robinson, Edward L.; Bayless, Amanda J. [Department of Astronomy, University of Texas at Austin, 1 University Station, Austin, TX 78712 (United States); Hakala, Pasi J. [Finnish Centre for Astronomy with ESO, Vaeisaelaentie 20, FIN-21500 Piikkioe, University of Turku (Finland)

2012-10-01T23:59:59.000Z

342

Band-Gap Reduction and Dopant Interaction in Epitaxial La,Cr Co-doped SrTiO3 Thin Films  

SciTech Connect

We show that by co-doping SrTiO3 (STO) epitaxial thin films with equal amounts of La and Cr it is possible to produce films with an optical band gap ~0.9 eV lower than that of undoped STO. Sr1-xLaxTi1-xCrxO3 thin films were deposited by molecular beam epitaxy and characterized using x-ray photoelectron spectroscopy and x-ray absorption near-edge spectroscopy to show that the Cr dopants are almost exclusively in the Cr3+ oxidation state. Extended x-ray absorption fine structure measurements and theoretical modeling suggest that it is thermodynamically preferred for La and Cr dopants to occupy nearest neighbor A- and B-sites in the lattice. Transport measurements show that the material exhibits variable-range hopping conductivity with high resistivity. These results create new opportunities for the use of doped STO films in photovoltaic and photocatalytic applications.

Comes, Ryan B.; Sushko, Petr; Heald, Steve M.; Colby, Robert J.; Bowden, Mark E.; Chambers, Scott A.

2014-12-03T23:59:59.000Z

343

Cr2O3 scale growth rates on metallic interconnectors derived from 40,000h solid oxide fuel cell stack operation  

Science Journals Connector (OSTI)

Abstract The ohmic resistance caused by Cr2O3 scale formation on metallic interconnects (MICs) can significantly contribute to the overall degradation of SOFC stacks. For this reason oxide scale growth on Cr5Fe1Y2O3 (CFY) and Fe22Cr0.5Mn (Crofer) was investigated by scanning electron microscopy (SEM) from post-test samples that were either exposed to air at 850 C (furnace) or operated in Hexis planar SOFC-stacks under dual atmospheres (anode and cathode conditions) at temperatures around 900 C. The study includes unique test results from a stack operated for 40,000 h. To analyze inhomogeneity in scale thicknesses a dedicated statistical image analysis method has been applied. SEM images were used to compare the structural phenomena related to MIC oxidation at different sample locations. The observed differences between different sample locations may relate to locally different conditions (temperature, pO2, H2O/O2-ratio). Cr2O3 scale growth on the anode side is found to be approximately twice as fast in comparison to the scale growth on cathode side. Finally, based on our time lapse analyses with extensive sampling it can be concluded that reliable predictions of scale growth requires statistical analyses over a period that covers at least a quarter (10,000 h) of the required SOFC stack lifetime (40,000 h).

Markus Linder; Thomas Hocker; Lorenz Holzer; K. Andreas Friedrich; Boris Iwanschitz; Andreas Mai; J. Andreas Schuler

2013-01-01T23:59:59.000Z

344

Electron Microscopy Study of Novel Ru Doped La0.8Sr0.2CrO3 as Anode Materials for Solid Oxide Fuel Cells (SOFCs)  

E-Print Network (OSTI)

Electron Microscopy Study of Novel Ru Doped La0.8Sr0.2CrO3 as Anode Materials for Solid Oxide Fuel of Materials Science and Engineering, Northwestern University, 2220 Campus Dr. Evanston, IL 60208 Solid Oxide Fuel Cells (SOFCs) have been the center of research activities with the goal of improving energy

Marks, Laurence D.

345

Journal of Power Sources 124 (2003) 197203 Electrochemical characterization of a polypyrrole/Co0.2CrOx composite  

E-Print Network (OSTI)

the performance of these cathode materials. They also found that polypyrrole is electrochem- ically active.2CrOx composite as a cathode material for lithium ion batteries Ramaraja P. Ramasamy, Basker the reversible capacity of the electrochemically active material up to 20%.AtC/10rate,areversiblecapacityof215 m

Popov, Branko N.

346

Shape and strain-induced magnetization reorientation and magnetic anisotropy in thin film Ti/CoCrPt/Ti lines and rings  

E-Print Network (OSTI)

The contributions to the magnetic anisotropy of thin-film rings and lines of width 50 nm and above made from Ti(5?nm)/Co[subscript 0.66]Cr[subscript 0.22]Pt[subscript 0.12] (10 and 20 nm)/Ti (3 nm) with a perpendicular ...

Velazquez, D.

347

Muon-spin-rotation measurements in the kagome lattice systems: Cr-jarosite and Fe-jarosite K. Kojima, L. P. Le,  

E-Print Network (OSTI)

Muon-spin-rotation measurements in the kagome´ lattice systems: Cr-jarosite and Fe-jarosite A-jarosite, a clear muon precession signal in zero field was found below 55 K, corresponding to the long-range order

Keren, Amit

348

Intra-ring variability of Cr, As, Cd, and Pb in red oak revealed by secondary ion mass spectrometry: Implications for environmental biomonitoring  

Science Journals Connector (OSTI)

...21). Mass balance studies suggest...000 tons of Cr wastewater into the watershed during...AMU, atomic mass units. (b...two alternative treatments are considered...J ( 1993 ) in Plants as Biomonitors...Activation Analysis Plants chemistry growth...Spectrometry, Mass, Secondary...

D. J. Brabander; N. Keon; R. H. R. Stanley; H. F. Hemond

1999-01-01T23:59:59.000Z

349

Electrical transport and structural study of CuCr1?xMgxO2 delafossite thin films grown by pulsed laser deposition  

Science Journals Connector (OSTI)

The growth and properties of delafossites CuCr1?xMgxO2 thin films are examined. These films are grown by pulsed laser deposition. As a class of materials delafossites have received recent interest since some members show p-type behavior. While not considered true wide-bandgap materials due to a narrow indirect bandgap that fails to adsorb light due to a forbidden same parity transition, optical transparencies greater than 40% in the visible can be observed. In order to be useful for transparent device applications, CuCr1?xMgxO2 films are needed with low resistivity and high optical transparency. Epitaxial films of CuCr1?xMgxO2 were grown on c-sapphire, examining the effects of oxygen pressure and growth temperature on film properties. Films were realized with resistivity of ~0.02?-cm and optical transparency of 40% in the visible. The formation of a problematic secondary minority spinel phase of (Cu,Mg)Cr2O4 is discussed. While conductivity increases substantially with Mg doping, the incidence of the spinel phase increases as well.

P.W. Sadik; M. Ivill; V. Craciun; D.P. Norton

2009-01-01T23:59:59.000Z

350

Lecture 17 Appendix B (analytic functions and contour We want to consider the analyticity properties (C-R) of the square root function  

E-Print Network (OSTI)

the analyticity properties (C-R) of the square root function In[1]:= f18 z_ : Sqrt z Now write this function_, y_ : Refine Re ComplexExpand f18 x y , Element x y, Reals ; V18 x_, y_ : Refine Im ComplexExpand f18

Ellis, Steve

351

Audit calculations with CORCON-MOD 3 of the duration of superheat in NUREG/CR-5423  

SciTech Connect

Analyses have shown that early rupture of the Mark-I boiling water reactor containment-by the direct action of core debris depends strongly on the time that core debris is superheated above its liquidus. The analyses of the duration of superheat in the core debris are compared to predictions obtained with the CORCON-MOD 3 computer code. The predicitons of this computer code as functions of the core debris mass, composition, and initial superheat are used to create a polynomial response surface. This response surface is used in a Monte Carlo analysis to produce probability distributions for the duration of superheat in core debris in the drywell of a Mark-I containment. It is concluded that to a high level of confidence (>90%) the duration of superheating predicted with the CORCON-MOD 3 code is less than what has been used in the analyses of the threats to the Mark-I containment liner. Based on these results, to the extent superheat duration dictates the threat to the liner, analyses in NUREG/CR-5423 would appear to overestimate the threat to the liner in comparison to threats estimated using the predictions of the duration of superheating obtained with CORCON-MOD 3.

Powers, D.A.; Heames, T.J.

1992-05-01T23:59:59.000Z

352

Aluminium depletion in NiCrAlY bond coatings by hot corrosion as a function of projection system  

Science Journals Connector (OSTI)

Three different projection system are used to prepare NiCrAlY bond coats over metallic substrates: atmospheric plasma spray (APS), high velocity oxyfuel (HVOF) and high frequency pulse detonation (HFPD). These coatings were tested in hot corrosion experiments with sprayed Na2SO4 at 1000C for 20 and 100h experiments in air. Coatings surface composition after thermal treatment was characterised by XRD and SEM. Cross section of coatings were analysed by SEM-EDX. A relationship between microstructural characteristics of initial coatings and final performance in hot corrosion was found in terms of porosity percentage: plasma sprayed coatings present higher percentage of porosity compared to HVOF and HFPD projection systems for the same composition and Al is heavily consumed in interparticle oxidation. This Al depletion in turn involves intrinsic chemical failure and surface layer is comprised by a porous spinel of mixed oxides. On the other hand, high energy projection systems produce dense coatings allowing the Al migration to external alumina layer, particularly in the case of HVOF coating.

M.C. Mayoral; J.M. Andrs; M.T. Bona; V. Higuera; F.J. Belzunce

2008-01-01T23:59:59.000Z

353

Computer program for the sensitivity calculation of a CR-39 detector in a diffusion chamber for radon measurements  

SciTech Connect

Computer software for calculation of the sensitivity of a CR-39 detector closed in a diffusion chamber to radon is described in this work. The software consists of two programs, both written in the standard Fortran 90 programming language. The physical background and a numerical example are given. Presented software is intended for numerous researches in radon measurement community. Previously published computer programs TRACK-TEST.F90 and TRACK-VISION.F90 [D. Nikezic and K. N. Yu, Comput. Phys. Commun. 174, 160 (2006); D. Nikezic and K. N. Yu, Comput. Phys. Commun. 178, 591 (2008)] are used here as subroutines to calculate the track parameters and to determine whether the track is visible or not, based on the incident angle, impact energy, etching conditions, gray level, and visibility criterion. The results obtained by the software, using five different V functions, were compared with the experimental data found in the literature. Application of two functions in this software reproduced experimental data very well, while other three gave lower sensitivity than experiment.

Nikezic, D., E-mail: nikezic@kg.ac.rs; Stajic, J. M. [Faculty of Science, University of Kragujevac, R. Domanovica 12, Kragujevac 34000 (Serbia)] [Faculty of Science, University of Kragujevac, R. Domanovica 12, Kragujevac 34000 (Serbia); Yu, K. N. [Department of Physics and Materials Science, City University of Hong Kong, 83 Tat Chee Avenue (Hong Kong)] [Department of Physics and Materials Science, City University of Hong Kong, 83 Tat Chee Avenue (Hong Kong)

2014-02-15T23:59:59.000Z

354

Lineshape of the singlet-triplet excitations in the dimer system Sr3Cr2O8 to first order in the high-density 1/z expansion  

Science Journals Connector (OSTI)

The Cr5+ ions in Sr3Cr2O8 constitute a strongly correlated spin-1/2 dimer system. Experiments show that the collective singlet-triplet excitations in this system are well defined in the zero-temperature limit, but, when heated, the inelastic neutron scattering peaks decrease rapidly in intensity and acquire a nonzero line width. When including the fluctuations to leading order in 1/z, where z is the coordination number, the diagrammatic high-density expansion is found to offer an accurate description of the singlet-triplet excitations. The theory explains not only the temperature dependencies of the intensities and line widths, but also that strong correlation causes the lineshapes to become asymmetric at temperatures comparable to the excitation energies.

J. Jensen; D. L. Quintero-Castro; A. T. M. N. Islam; K. C. Rule; M. Mnsson; B. Lake

2014-04-11T23:59:59.000Z

355

Specification of CuCrZr Alloy Properties after Various Thermo-Mechanical Treatments and Design Allowables including Neutron Irradiation Effects  

SciTech Connect

Precipitation hardened CuCrZr alloy is a promising heat sink and functional material for various applica- tions in ITER, for example the first wall, blanket electrical attachment, divertor, and heating systems. Three types of thermo-mechanical treatment were identified as most promising for the various applica- tions in ITER: solution annealing, cold working and ageing; solution annealing and ageing; solution annealing and ageing at non-optimal condition due to specific manufacturing processes for engineer- ing-scale components. The available data for these three types of treatments were assessed and mini- mum tensile properties were determined based on recommendation of Structural Design Criteria for the ITER In-vessel Components. The available data for these heat treatments were analyzed for assess- ment of neutron irradiation effect. Using the definitions of the ITER Structural Design Criteria the design allowable stress intensity values are proposed for CuCrZr alloy after various heat treatments.

Barabash, Vladimir [ITER Organization, Saint Paul Lez Durance, France] [ITER Organization, Saint Paul Lez Durance, France; Kalinin, G. M. [RDIPE, P.O. Box 788, 101000 Moscow, Russia] [RDIPE, P.O. Box 788, 101000 Moscow, Russia; Fabritsiev, Sergei A. [D.V. Efremov Scientific Research Institute, St. Petersburg, Russia] [D.V. Efremov Scientific Research Institute, St. Petersburg, Russia; Zinkle, Steven J [ORNL] [ORNL

2012-01-01T23:59:59.000Z

356

Applicability of Loss of Offsite Power (LOSP) Events in NUREG/CR-6890 for Entergy Nuclear South (ENS) Plants LOSP Calculations  

SciTech Connect

Significant differences have been identified in loss of offsite power (LOSP or LOOP) event description, category, duration, and applicability between the LOSP events used in NUREG/CR-6890 and ENS'LOSP packages, which were based on EPRI LOSP reports with plant-specific applicability analysis. Thus it is appropriate to reconcile the LOSP data listed in the subject NUREG and EPRI reports. A cross comparison showed that 62 LOSP events in NUREG/CR-6890 were not included in the EPRI reports while 4 events in EPRI reports were missing in the NUREG. Among the 62 events missing in EPRI reports, the majority were applicable to shutdown conditions, which could be classified as category IV events in EPRI reports if included. Detailed reviews of LERs concluded that some events did not result in total loss of offsite power. Some LOSP events were caused by subsequent component failures after a turbine/plant trip, which have been modeled specifically in most ENS plant PRA models. Moreover, ENS has modeled (or is going to model) the partial loss of offsite power events with partial LOSP initiating events. While the direct use of NUREG/CR-6890 results in SPAR models may be appropriate, its direct use in ENS' plant PRA models may not be appropriate because of modeling details in ENS' plant-specific PRA models. Therefore, this paper lists all the differences between the data in NUREG/CR-6890 and EPRI reports and evaluates the applicability of the LOSP events to ENS plant-specific PRA models. The refined LOSP data will characterize the LOSP risk in a more realistic fashion. (authors)

Li, Yunlong; Yilmaz, Fatma; Bedell, Loys [Entergy Nuclear South (United States)

2006-07-01T23:59:59.000Z

357

Impact of Lattice Mismatch and Stoichiometry on the Structure and Bandgap of (Fe,Cr)2O3 Epitaxial Thin Films  

SciTech Connect

The structural properties of high-quality epitaxial (Fe1-xCrx)2O3 thin films are investigated across the composition range. Epitaxial films are deposited on a-Al2O3(0001) substrates by oxygen-plasma-assisted molecular beam epitaxy. Corundum (Fe1-xCrx)2O3 supercells relaxed by density functional theory confirm that the non-linear behavior of the bulk lattice parameters originates in the magnetic structure of the alloy films. High-resolution x-ray diffraction reveals the degree of epitaxial strain relaxation in the films, with Cr-rich films remaining partially strained to the Al2O3 substrate. For intermediate compositions, a lattice expansion and non-Poisson-like tetragonal distortion are found. Scanning transmission electron microscopy and electron energy loss spectroscopy reveal a columnar grain structure in the films, with uniform mixing of cations on the nanometer scale. Oxygen non-stoichiometry is quantified by non-Rutherford resonant elastic scattering measurements utilizing 3.04 MeV He+. Intermediate-composition films are found to be slightly over-stoichiometric, resulting in the observed lattice expansion. Cr-rich films, in contrast, appear to be slightly oxygen deficient. A model is proposed to explain these results based on the energetics of oxygen defect formation and rate of oxygen diffusion in the corundum lattice. Compressive biaxial strain is found to reduce the bandgap of epitaxial Cr2O3 relative to the bulk value. The relationships which are elucidated between epitaxial film structure and optical properties can be applied to bandgap optimization in the (Fe,Cr)2O3 system.

Kaspar, Tiffany C.; Chamberlin, Sara E.; Bowden, Mark E.; Colby, Robert J.; Shutthanandan, V.; Manandhar, Sandeep; Wang, Yong; Sushko, Petr; Chambers, Scott A.

2014-03-13T23:59:59.000Z

358

Structural, chemical, and electrochemical characteristics of LaSr2Fe2CrO9--based solid oxide fuel cell anodes  

E-Print Network (OSTI)

Available online 5 March 2012 Keywords: Solid oxide fuel cell Perovskite Oxide anode Redox Sulfur tolerance Solid oxide fuel cells with LaSr2Fe2CrO9-­Gd0.1Ce0.9O2- composite anodes were tested in H2, H2S-of-the-art solid oxide fuel cell (SOFC) anode is Ni-8-mole% yttria stabilized zirconia (YSZ), which performs very

Poeppelmeier, Kenneth R.

359

Corrosion behavior in high heat input welded heat-affected zone of Ni-free high-nitrogen Fe18Cr10MnN austenitic stainless steel  

SciTech Connect

The pitting corrosion and interphase corrosion behaviors in high heat input welded heat-affected zone (HAZ) of a metastable high-nitrogen Fe18Cr10MnN austenitic stainless steel were explored through electrochemical tests. The HAZs were simulated using Gleeble simulator with high heat input welding condition of 300 kJ/cm and the peak temperature of the HAZs was changed from 1200 C to 1350 C, aiming to examine the effect of ?-ferrite formation on corrosion behavior. The electrochemical test results show that both pitting corrosion resistance and interphase corrosion resistance were seriously deteriorated by ?-ferrite formation in the HAZ and their aspects were different with increasing ?-ferrite fraction. The pitting corrosion resistance was decreased by the formation of Cr-depleted zone along ?-ferrite/austenite (?) interphase resulting from ?-ferrite formation; however it didn't depend on ?-ferrite fraction. The interphase corrosion resistance depends on the total amount of Cr-depleted zone as well as ferrite area and thus continuously decreased with increasing ?-ferrite fraction. The different effects of ?-ferrite fraction on pitting corrosion and interphase corrosion were carefully discussed in terms of alloying elements partitioning in the HAZ based on thermodynamic consideration. - Highlights: Corrosion behavior in the weld HAZ of high-nitrogen austenitic alloy was studied. Cr{sub 2}N particle was not precipitated in high heat input welded HAZ of tested alloy. Pitting corrosion and interphase corrosion show a different behavior. Pitting corrosion resistance was affected by whether or not ?-ferrite forms. Interphase corrosion resistance was affected by the total amount of ?-ferrite.

Moon, Joonoh, E-mail: mjo99@kims.re.kr; Ha, Heon-Young; Lee, Tae-Ho

2013-08-15T23:59:59.000Z

360

A neutron diffraction study of the magnetic structure for the perovskite-type mixed oxides La(Mn, Cr)03 and (La, Sr)Fe03  

E-Print Network (OSTI)

and Type A Magnetic Cell.............................. 55 12. Magnetic Structure Types A and G According to Semicovalent Bonding Scheme ........................................ 59 13. Temperature Difference Pattern and Magnetic Cell for G... techniques have been applied to the study of the magnetic structure properties of perovskite-type compounds La(Cr,Mn)02 and (La^S^FeOy The perovskite cell is ideally cubic with one molecule ABO^ per unit cell. For the compounds studied the B ion located...

Bents, Ulrich H.

2013-10-04T23:59:59.000Z

Note: This page contains sample records for the topic "ire cr eek" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Structure model for the () phase in Al-Cr-Si alloys deduced from the phase by the strong-reflections approach  

Science Journals Connector (OSTI)

Two closely related quasicrystal approximants are expected to have similar crystallographic structure-factor amplitudes and phases for the strong reflections so the structure of an unknown quasicrystal approximant can be solved from a related known quasicrystal approximant. This strong-reflections approach is applied to the new ()-AlCrSi phase and a structure model of () is deduced from the structure of the related -Al4Mn phase.

Zhang, H.

2006-01-17T23:59:59.000Z

362

Large-scale shell-model calculations for unnatural-parity high-spin states in neutron-rich Cr and Fe isotopes  

E-Print Network (OSTI)

We investigate unnatural-parity high-spin states in neutron-rich Cr and Fe isotopes using large-scale shell-model calculations. These shell-model calculations are carried out within the model space of $fp$-shell + $0g_{9/2}$ + $1d_{5/2}$ orbits with the truncation allowing $1\\hbar\\omega$ excitation of a neutron. The effective Hamiltonian consists of GXPF1Br for $fp$-shell orbits and $V_{\\rm MU}$ with a modification for the other parts. The present shell-model calculations can describe and predict the energy levels of both natural- and unnatural-parity states up to the high-spin states in Cr and Fe isotopes with $N\\le35$. The total energy surfaces present the prolate deformations on the whole and indicate that the excitation of one neutron into the $0g_{9/2}$ orbit plays the role of enhancing the prolate deformation. For the positive(unnatural)-parity states in odd-mass Cr and Fe isotopes, their energy levels and prolate deformations indicate the decoupling limit of the particle-plus-rotor model. We have found...

Togashi, Tomoaki; Utsuno, Yutaka; Otsuka, Takaharu; Honma, Michio

2014-01-01T23:59:59.000Z

363

Absence of spin-flip transition at the Cr(001) surface: A combined spin-polarized scanning tunneling microscopy and neutron scattering study  

SciTech Connect

The spin-density wave (SDW) on Cr(001) has been investigated at temperatures between 20-300 K by means of spin-polarized scanning tunneling microscopy (SP-STM). Although neutron-scattering data measured on the same crystal clearly show a spin-flip transition from a transversal (T)-SDW to a longitudinal (L)-SDW at the expected spin-flip (SF) temperature T{sub SF}=123 K, no change was found on the Cr(001) surface with SP-STM. Throughout the entire temperature range the Cr(001) surface maintains a topological antiferromagnetic order with an in-plane magnetization that inverts between adjacent atomically flat terraces separated by monatomic step edges. The experimental results are interpreted by an absence of a spin-flip transition in the near-surface region probably driven by the surface anisotropy. The continuous connection of the surface T-SDW to the bulk L-SDW is accomplished by the formation of a 90 deg. domain wall just below the surface.

Haenke, T.; Krause, S.; Berbil-Bautista, L.; Bode, M.; Wiesendanger, R.; Wagner, V.; Lott, D.; Schreyer, A. [Institute of Applied Physics and Microstructure Research Center, University of Hamburg, Jungiusstrasse 11, D-20355 Hamburg (Germany); Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, D-38116 Braunschweig (Germany); Institut fuer Werkstoffforschung, GKSS Forschungszentrum, Max-Planck-Strasse 1, D-21502 Geesthacht (Germany)

2005-05-01T23:59:59.000Z

364

Methylene megration and coupling on a non-reducible metal oxide: the reaction of dichloromethane on stoichiometric -Cr2O3(0001)  

SciTech Connect

The reaction of CH2Cl2 over the nearly-stoichiometric -Cr2O3(0001) surface produces gas phase ethylene, methane and surface chlorine adatoms. The reaction is initiated by the decomposition of CH2Cl2 into surface methylene and chlorine. Photoemission indicates that surface cations are the preferred binding sites for both methylene and chlorine adatoms. Two reaction channels are observed for methylene coupling to ethylene in temperature-programmed desorption (TPD). A desorption-limited, low-temperature route is attributed to two methylenes bound at a single site. The majority of ethylene is produced by a reaction-limited process involving surface migration (diffusion) of methylene as the rate-limiting step. DFT calculations indicate the surface diffusion mechanism is mediated by surface oxygen anions. The source of hydrogen for methane formation is adsorbed background water. Chlorine adatoms produced by the dissociation of CH2Cl2 deactivate the surface by simple site-blocking of surface Cr3+ sites. A comparison of experiment and theory shows that DFT provides a better description of the surface chemistry of the carbene intermediate than DFT+U using reported parameters for a best representation of the bulk electronic properties of -Cr2O3.

Dong, Yujung [Virginia Polytechnic Institute and State University; Brooks, John [Virginia Polytechnic Institute and State University; Chen, Tsung-Liang [ORNL; Mullins, David R [ORNL; Cox, David F. [Virginia Polytechnic Institute and State University

2015-01-01T23:59:59.000Z

365

Nitric Oxide Photogeneration from trans-Cr(cyclam)(ONO)2+ in a Reducing Environment. Activation of Soluble Guanylyl Cyclase and Arterial Vasorelaxation  

Science Journals Connector (OSTI)

We also demonstrate that photolysis of 1 in the nM concentration range with a portable blue LED leads to vasorelaxation of porcine coronary arterial rings, a process also attributed to the NO activation of sGC. ... Abbreviations: BSA, bovine serum albumin; CFL, compact fluorescent light-bulb; cGMP, cyclic guanosine monophosphate; cyclam, 1,4,8,11-tetraazacyclotetradecane; DEA/NO, (Z)-l-(N,N-diethylamino)-diazen-l-ium-l,2-diolate; EDTA, ethylenediaminetetraacetic acid; GSH, glutathione; GTP, guanosine triphosphate; sGC, soluble guanylyl cyclase; IBMX, isobutylmethylxanthine; LED, light emitting diode; NO, nitric oxide; NOA, nitric oxide analyzer; ODQ, 1H-[1,2,4]oxadiazolo[4,3-a]quinoxalin-1-one; U46619, 9,11-dideoxy-ll?,9?-epoxy-methanoprostaglandin F2?. ... data show that the expected fluorescence of the pendant chromophores is largely quenched when the macrocyclic ligand is coordinated to these Cr(III) centers, and this is interpreted in terms of fast energy transfer processes from the ligand-centered ??* states to the Cr(III)-centered ligand field states leading to subsequent cleavage of the Cr(III)-coordinated nitrito ligand. ...

Alexis D. Ostrowski; Sherine J. Deakin; Bilal Azhar; Thomas W. Miller; Nestor Franco; Melisa M. Cherney; Andrea J. Lee; Judith N. Burstyn; Jon M. Fukuto; Ian L. Megson; Peter C. Ford

2009-12-01T23:59:59.000Z

366

Constitutive Model for the Time-Dependent Mechanical Behavior of 430 Stainless Steel and FeCrAlY Foams in Sulfur-Bearing Environments  

SciTech Connect

The mechanical behavior of 430 stainless steel and pre-oxidized FeCrAlY open-cell foam materials of various densities was evaluated in compression at temperatures between 450 C and 600 C in an environment containing hydrogen sulfide and water vapor. Both materials showed negligible corrosion due to the gaseous atmosphere for up to 168 hours. The monotonic stress-strain response of these materials was found to be dependent on both the strain rate and their density, and the 430 stainless steel foam materials exhibited less stress relaxation than FeCrAlY for similar experimental conditions. Using the results from multiple hardening-relaxation and monotonic tests, an empirical constitutive equation was derived to predict the stress-strain behavior of FeCrAlY foams as a function of temperature and strain rate. These results are discussed in the context of using these materials in a black liquor gasifier to accommodate the chemical expansion of the refractory liner resulting from its reaction with the soda in the black liquor.

Hemrick, James Gordon [ORNL; Lara-Curzio, Edgar [ORNL

2013-01-01T23:59:59.000Z

367

Reactions of Ethyl Groups on a Model Chromia Surface: Ethyl Chloride on Stoichiometric Alpha-Cr2O3(1012)  

SciTech Connect

The reaction of CH3CH2Cl over the nearly-stoichiometric ?-Cr2O3 (1 0 View the MathML source 2) surface yields gas phase CH2double bond; length as m-dashCH2, CH3CH3, H2 and surface chlorine adatoms. The decomposition reaction is initiated via C-Cl bond cleavage to give a surface ethyl (CH3CH2-) intermediate. A rate-limiting ?-hydride elimination from the surface ethyl species produces gas phase CH2double bond; length as m-dashCH2 and surface hydrogen atoms. Two parallel competing reactions form CH3CH3, via ?-hydride addition to remaining surface ethyl species (reductive elimination), and H2, via the combination of two surface hydrogen atoms. The chlorine freed from the dissociation of CH3CH2Cl binds at the five-coordinate surface Cr3+ sites on the stoichiometric surface and inhibits the surface chemistry via simple site blocking. No surface carbon deposition is observed from the thermal reaction of ethyl chloride, suggesting that ethyl intermediates are not primary coke forming intermediates in the dehydrogenation of ethane over (1 0 View the MathML source 2) facets of ?-Cr2O3.

Brooks, J.; Ma, Q; Cox, D

2009-01-01T23:59:59.000Z

368

Effect of aluminizing of Cr-containing ferritic alloys on the seal strength of a novel high-temperature solid oxide fuel cell sealing glass  

SciTech Connect

A novel high-temperature alkaline-earth silicate sealing glass was developed for solid oxide fuel cell (SOFC) applications. The glass was used to join two metallic coupons of Cr-containing ferritic stainless steel for seal strength evaluation. In previous work, SrCrO4 was found to form along the glass/steel interface, which led to severe strength degradation. In the present study, aluminization of the steel surface was investigated as a remedy to minimize or prevent the strontium chromate formation. Three different processes for aluminization were evaluated with Crofer22APU stainless steel: pack cementation, vapor phase deposition, and aerosol spraying. It was found that pack cementation resulted in a rough surface with occasional cracks in the Al-diffused region. Vapor phase deposition yielded a smoother surface, but the resulting high Al content increased the coefficient of thermal expansion (CTE), resulting in failure of joined coupons. Aerosol spraying of an Al-containing salt resulted in formation of a thin aluminum oxide layer without any surface damage. The room temperature seal strength was evaluated in the as-fired state and in environmentally aged conditions. In contrast to earlier results with uncoated Crofer22APU, the aluminized samples showed no strength degradation even for samples aged in air. Interfacial and chemical compatibility was also investigated. The results showed aluminization to be a viable candidate approach to minimize undesirable chromate formation between alkaline earth silicate sealing glass and Cr-containing interconnect alloys for SOFC applications.

Chou, Y. S.; Stevenson, Jeffry W.; Singh, Prabhakar

2008-12-01T23:59:59.000Z

369

Effects of strain and buffer layer on interfacial magnetization in Sr2CrReO6 films determined by polarized neutron reflectometry  

Science Journals Connector (OSTI)

We have determined the depth-resolved magnetization structures of a series of highly ordered Sr2CrReO6 (SCRO) ferrimagnetic epitaxial films via combined studies of x-ray reflectometry, polarized neutron reflectometry, and superconducting quantum interference device magnetometry. The SCRO films deposited directly on (LaAlO3)0.3(Sr2AlTaO6)0.7 or SrTiO3 substrates show reduced magnetization of similar width near the interfaces with the substrates, despite having different degrees of strain. When the SCRO film is deposited on a SrCr0.5Nb0.5O3 (SCNO) double perovskite buffer layer, the width of the interfacial region with reduced magnetization is decreased. However, the relative reduction of the magnetization averaged over the interfacial regions is comparable among the three samples. Interestingly, we found that the magnetization suppression region is wider than the Cr/Re antisite disorder region at the interface between SCRO and SCNO.

Yaohua Liu; J. M. Lucy; A. Glavic; H. Ambaye; V. Lauter; F. Y. Yang; S. G. E. te Velthuis

2014-09-19T23:59:59.000Z

370

Characterizations of 21-4N to 4Cr9Si2 stainless steel dissimilar joint bonded by electric-resistance-heat-aided friction welding  

Science Journals Connector (OSTI)

A new welding process, electric-resistance-heat-aided friction welding (ERHAFW), was introduced in this study. To further improve the joint quality and energy-saving, electric resistance welding was combined with the conventional continuous-drive friction welding. 21-4N (austenitic stainless steel) and 4Cr9Si2 (martensitic stainless steel) valve steel rods of 4mm diameter were used as base metals. The results show that electric-resistance-heat-aided friction welding can be applied to join thin rods within a relatively short time, which is very difficult for conventional friction welding (FW). The microstructure of ERHAFW bonded 21-4N to 4Cr9Si2 presents non-uniform across the joint. Different structure zones are observed from the weld line to both sides, which are the weld center, thermo-mechanically affected zone (TMAZ) and heat affected zone (HAZ). These regions exhibit different structures owing to the difference in the thermophysical and mechanical properties of these two steels under the fast heating and cooling during welding. The variation of microhardness in the joint is attributed to the microstructure change. The higher microhardness is obtained in the weld center and TMAZ of 4Cr9Si2 corresponding to the presence of fine tempered martensite and carbides.

Wen-Ya Li; Min Yu; Jinglong Li; Guifeng Zhang; Shiyuan Wang

2009-01-01T23:59:59.000Z

371

Electroerosion resistance and structural phase transformations in electrospark and laser deposition of titanium alloys using composite ceramics based on ZrB2-ZrSi2 and TiN-Cr3C2 systems  

Science Journals Connector (OSTI)

The paper examines the mass transfer kinetics, structure, phase and chemical compositions, and micromechanical properties of electrospark and laser coatings on titanium alloys (including...2-ZrSi2 and TiN-Cr3C2 s...

I. A. Podchernyaeva; A. D. Panasyuk

2008-01-01T23:59:59.000Z

372

Influence of interactions between chromium and cerium on catalytic performances of CrO x CeO2/Ti-PILC catalysts for deep oxidation of n-butylamine  

Science Journals Connector (OSTI)

A series of CrO x CeO2/Ti-PILC (PILC is pillared interlayered clay) catalysts for n-butylamine oxidation were prepared using an impregnation method, and the structures, surface ...

Shanshan Yang; Qinqin Huang; Renxian Zhou

2014-11-01T23:59:59.000Z

373

The Earth-Moon CR3BP: A full Atlas of low-energy fast periodic transfer orbits  

E-Print Network (OSTI)

In the framework of the planar CR3BP for mass parameter mu=0.0121505, corresponding to the Earth-Moon system, we identify and describe 80 families of periodic orbits encircling both the Earth and the Moon ("transfer" orbits). All the orbits in these families have very low energies, most of them corresponding to values of the Jacobi constant C for which the Hill surface is closed at the Lagrangian point L2. All of these orbits have also short period T, generally under six months. Most of the families are composed of orbits that are asymmetric with respect to the Earth-Moon axis. The main results presented for each family are: (i) the characteristic curves T(h), y(h), v_y(h), and v_x(h) on the Poincare section Sigma_1={x=0.836915310,y,v_x>0,v_y} normal to the Earth-Moon axis at the Lagrangian point L1, parameterized by their energy h=-C/2 in the synodic coordinate system; (ii) the stability parameter along each family; (iii) the intersections x_i(h) of the orbits with the Earth-Moon axis, on the Poincare section Sigma_2={x,y=0,v_x},v_y>0}; (iv) plots of some selected orbits and details of their circumlunar region; and (v) numerical data for the intersection of an orbit with Sigma_1 at a reference value of h. Some possible extensions and applications of this work are also discussed.

Alejandro M. Leiva; Carlos B. Briozzo

2006-12-14T23:59:59.000Z

374

11554_cover_CR  

NLE Websites -- All DOE Office Websites (Extended Search)

NERSC 2005 Annual Report National Energy Research Scientific Computing Center 05 NERSC 2005 Annual Report National Energy Research Scientific Computing Center Lawrence Berkeley National Laboratory / 1 Cyclotron Road / Berkeley CA / 94720 LBNL-60296 The Year in Perspective 2 Research News 4 The Heat Is On 5 Burning Questions 9 Combustion Up Close 11 Hailstones in Hell 13 A Perfect Liquid 15 Whispers from Underground 18 Breaking Up Is Hard to Calculate 20 Talent Scouting 23 Surface Charge 25 Magnetic Disks in Space 26 Proteins in Motion 30 NERSC Users Honored 34 The NERSC Center 35 Science-Driven Computing 36 DOE Greenbook Published 36 NERSC's Five-Year Plan 36 DOE Review of NERSC 37 Organizational Changes 38 Science-Driven Systems 40 Two New Clusters: Jacquard and Bassi 40 New Visual Analytics Server:

375

NUREG/CR-6399  

Office of Scientific and Technical Information (OSTI)

399 399 ORNL- 6886 Results of Charpy V-Notch Impact Testing of Structural Steel Specimens Irradiated at - 30°C to 1 x 10l6 neutrons/cm2 in a Commercial Reactor Cavity Manuscript Completed June 1996 Date Published: April 1997 Prepared by S. K Iskander, R. E. Stoller Oak Ridge National Laboratory Managed by Lockheed Martin Energy Systems Oak Ridge National Laboratory Oak Ridge, TN 37831-6285 M. Vassilaros, NRC Project Manager Prepared for Division of Engineering Technology Office of Nuclear Regulatory Research U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 NRC Job Code L1098 Abstract A capsule containing Charpy V-notch (CVN) and mini-tensile specimens was irradiated at - 30°C (- 85°F) in the cavity of a commercial nuclear power plant to a fluence of 1

376

UCRL-CR--10  

NLE Websites -- All DOE Office Websites (Extended Search)

-10 -10 4934 DE91 000814 PHOTOCONDUCTIVITY OF ACTIVATED CARBONFIBERS ' Ko Kuriyama Mo S. ,Dresselhaus MIT ...... ' Cambridge, Massachusetts ' MASTEB ,_ ' _Yii:i" ' £31STRIBUTION OFIT_"IIS DoCUMEt"JT IS L I?',_'-:'_ , I)IS('I,AIMI,',R Work pt`rforlnt`(I iiil(|t`r lilt' llll._illl'_-'_Of lilt' I J,,H, I)t, pllrl- mt`ni of i,_nt`r_)' I),_' l,=lwrt`n_'t` I,Ivi.,rmort` Ntllhrn=ll l,ld_or=_- Ior,_'mldc,r _'onlrzlct mlml}t`r W-74(15-1,1N(;.4X, 'l'hi,_ doc'mm..||l t_'=l.,_ prt`p=lrt`d =Is ==_l=lt'v,,,|ml o1' work _ptm._(!rvd I_)' IIn =lp, t`|lC')' 01' lht` (ll|ilt`(l ,_tiHl's (;|_vt`rnn|t`nt. Nvilht, r lht` I Inilt`d ,Sl=dL, s (;o_'t`rl|u|el|l mir Iht` t ll|i_'t`r_lt.,,'of ('lllifl)r,fl_l mrr lilLY o1"II,.,Ir v|lll_l_|)'t`t`_, I|mkt`_ _lll)' ,_'_mrr_lnl); exprt`_ or i|npllt`d, or _l_sl|i|lt`_ _|,ly lel_=lllhd)lilly i_r r¢'sl)(m- _ihilll)'

377

Manufacturing and properties of newly developed 9%CrMoVNiNbN high-pressure low-pressure rotor shaft forging  

SciTech Connect

In order to obtain the improved strength and toughness for high-pressure low-pressure rotor shaft forging, fundamental studies using laboratory heats were performed on the 9CrMoV base materials, and effects of chemistry on toughness and creep rupture strength were investigated. From the investigation, it is showed that the superclean 9CrMoVNiNbN steel with reduced Si and Mn contents and Ni addition provides a superior strength versus toughness balance. Based on these fundamental studies, a trial high-pressure low-pressure rotor shaft forging with diameter of low-pressure section of 1,750 mm and diameter of high-pressure section of 1,200 mm was successfully manufactured from the diameter of 1,800 mm, and the weight of 65 ton ESR ingot. From the evaluation test results of this trial rotor forging, homogeneous distribution of chemistry was confirmed and low impurity contents was observed in the whole forging. The superior strength and toughness were confirmed with good creep rupture strength. The FATT at the center of low-pressure section was {minus}3 C with the tensile strength level of 870 MPa. From the results of fracture toughness test, low cycle fatigue test, and isothermal aging test, superior mechanical properties were demonstrated. Thus, the superclean 9CrMoVNiNbN steel with reduced Si and Mn contents and Ni addition, is particularly suitable for the high-pressure low-pressure rotor material for advanced combined cycle power plants.

Azuma, Tsukasa; Tanaka, Yasuhiko; Ishiguro, Tohru; Yoshida, Hajime; Ikeda, Yasumi [Japan Steel Works, Muroran (Japan)

1997-12-31T23:59:59.000Z

378

XPS on corrosion products of ZnCr coated steel: on the reliability of Ar+ ion depth profiling for multi component material analysis  

E-Print Network (OSTI)

X-ray photoelectron spectroscopy combined with Ar+ ion etching is a powerful concept to identify different chemical states of compounds in depth profiles, important for obtaining information underneath surfaces or at layer interfaces. The possibility of occurring sputter damage is known but insufficiently investigated for corrosion products of Zn-based steel coatings like ZnCr. Hence, in this work reference materials are studied according to stability against ion sputtering. Indeed some investigated compounds reveal a very unstable chemical nature. On the basis of these findings the reliability of depth profiles of real samples can be rated to avoid misinterpretations of observed chemical species.

Steinberger, Roland; Arndt, Martin; Stifter, David

2013-01-01T23:59:59.000Z

379

Technical note: Erroneous data in {open_quotes}Nuclear Safety Guide, TID-7016, Revision 2,{close_quotes} NUREG/CR-0095, ORNL/NUREG/CSD-6 (1978)  

SciTech Connect

Nuclear Safety Guide, TID-7016 Rev 2 was issued as NUREG/CR-0095 in 1978. Table 2.8 of this report has been found to contain errors. The table was designed to indicate configurations with effective multipliction factors of 0.95. Because of an error in configuration descriptions, some of the configurations have multiplication factors as high as 1.09. A corrected table is available from the undersigned, and Revision 3 of the report is being prepared. Norman L. Pruvost, LANL HSE-6, P. O. Box 1663, M/S-F691, Los Alamos, NM 87545.

Whitesides, G.E. [Oak Ridge National Lab., TN (United States)

1991-04-01T23:59:59.000Z

380

Investigation of the ultrasonic wave influence on magnetic ordering in a 20 x [Fe(20 A)/Cr(12 A)]/MgO layered structure  

SciTech Connect

A 20 x [Fe(20 A)/Cr (12 A)]/MgO structure excited by an ultrasonic wave was investigated by polarized neutron reflectometry. It was found that magnetic domains oscillate and their effective size decreases in weak magnetic fields. In close-to-saturation fields, a magnetic lattice is formed in the layered structure; the interplanar spacings in this lattice change with an increase in the field strength and as a result of the excitation of the structure by an ultrasonic wave.

Aksenov, V. L.; Nikitenko, Yu. V.; Proglyado, V. V.; Khaidukov, Yu. N., E-mail: khaiduk@nf.jinr.ru [Joint Institute for Nuclear Research (Russian Federation); Gavrilov, V. N.; Raitman, E. [Institute of Physical Energetics (Latvia); Bottyan, L.; Nagy, D. L. [Research Institute for Particle and Nuclear Physics (Hungary)

2008-09-15T23:59:59.000Z

Note: This page contains sample records for the topic "ire cr eek" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Mandatory dedication of park and open space land: effectiveness of and attitudes toward this method of public land acquisition in Texas  

E-Print Network (OSTI)

the orD. 'nance an" = cate 1 . gi; 1st icr. styucI; &1olin. Hcrwever r tile Ca'. if orn It l the p Cb ro, van Co r -. sts t: he c". Irlci 1. t. Lorl 5 ancl r I's tric f Oy!ri CO tne . 1 O LIWrne CS I t 1 r(l. Cr Wno H eek-nrI C cog!'. 1'Le uty..."r case involved the testing of an ordinance wh' ch had bee-! enacted by the City of Naperville which . ;equi ed mandatory dedication of land for both schools and public op! n space, or . i n 1) eu of land, ?t he contribut! on of money for the establi...

Ehman, Douglas Richard

2012-06-07T23:59:59.000Z

382

Excited state absorption of V/sup 2 +/ and Cr/sup 3 +/ ions in crystal hosts. [V/sup 2 +/ in KMgF/sub 3/; Cr/sup 3 +/ in Na/sub 3/Ga/sub 2/Li/sub 3/F/sub 12/ and BeAl/sub 2/O/sub 4/  

SciTech Connect

We have measured the excited state absorption spectra of KMgF/sub 3/:V/sup 2 +/, Na/sub 3/Ga/sub 2/Li/sub 3/F/sub 12/:Cr/sup 3 +/, and BeAl/sub 2/O/sub 4/:Cr/sup 3 +/. The /sup 4/T/sub 2/ ..-->.. /sup 4/T/sub 1/a, /sup 4/T/sub 1/b transitions were observed for the first two systems, while the /sup 2/E, /sup 2/T/sub 1/ ..-->.. /sup 2/T/sub 2/ transitions were seen for BeAl/sub 2/O/sub 4/:Cr/sup 3 +/. All excited state absorptions, except the /sup 4/T/sub 2/ ..-->.. /sup 4/T/sub 1/a transition, can be understood on the basis of simple crystal field theory. The /sup 4/T/sub 2/ ..-->.. /sup 4/T/sub 1/a transition is found to be profoundly modified by the Jahn-Teller effect, such that it is broader and at higher energy than otherwise expected. This excited state absorption is observed to overlap the emission spectrum of KMgF/sub 3/:V/sup 2 +/, and thereby substantially reduce the effective stimulated emission cross-section.

Payne, S.A.; Chase, L.L.

1987-01-01T23:59:59.000Z

383

The bonding, charge distribution, spin ordering, optical, and elastic properties of four MAX phases Cr{sub 2}AX (A?=?Al or Ge, X?=?C or N): From density functional theory study  

SciTech Connect

In this work, we assess a full spectrum of properties (chemical bonding, charge distribution, spin ordering, optical, and elastic properties) of Cr{sub 2}AC (A?=?Al, Ge) and their hypothetical nitride counterparts Cr{sub 2}AN (A?=?Al, Ge) based on density functional theory calculations. The calculated total energy values indicate that a variety of spin ordering of these four compounds depending on interlayer-interactions between M-A and M-X within the sublattice, which is supported by bonding analysis. MAX phase materials are discovered to possess exotic magnetic properties which indicates that these materials could serve as promising candidates for novel layered magnetic materials for various electronic and spintronic applications. Further analysis of optical properties for two polarization vectors of Cr{sub 2}AX shows that the reflectivity is high in the visible-ultraviolet region up to ?15?eV suggesting Cr{sub 2}AX as a promising candidate for use as a coating material. The elastic coefficients (C{sub ij}) and bulk mechanical properties [bulk modulus (K), shear modulus (G), Young's modulus (E), Poisson's ratio (?), and Pugh ratio (G/K)] of these four Cr{sub 2}AX compounds are also calculated and analyzed, which pave the way to predict or design new MAX phases that are less brittle or tougher by having a lower G/K value or higher ?.

Li, Neng, E-mail: lineng@umkc.edu [Center for Photovoltaics and Solar Energy, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055 (China); Department of Physics and Astronomy, University of Missouri-Kansas City, Kansas City, Missouri 64110 (United States); Mo, Yuxiang; Ching, Wai-Yim [Department of Physics and Astronomy, University of Missouri-Kansas City, Kansas City, Missouri 64110 (United States)

2013-11-14T23:59:59.000Z

384

A Successful Synthesis of the CoCrFeNiAl{sub 0.3} Single-Crystal, High-Entropy Alloy by Bridgman Solidification  

SciTech Connect

For the first time, a face-centered-cubic, single-crystal CoCrFeNiAl{sub 0.3} (designated as Al0.3), high-entropy alloy (HEA) was successfully synthesized by the Bridgman solidification (BS) method, at an extremely low withdrawal velocity through a constant temperature gradient, for which it underwent two BS steps. Specially, at the first BS step, the alloy sample underwent several morphological transitions accompanying the crystal growth from the melt. This microstructure evolves from as-cast dendrites, to equiaxed grains, and then to columnar crystals, and last to the single crystal. In particular, at the equiaxed-grain region, some visible annealing twins were observed, which indicates a low stacking fault energy of the Al0.3 alloy. Although a body-centered- cubic CoCrFeNiAl (Al1) HEA was also prepared under the same conditions, only a single columnar-crystal structure with instinctively preferential crystallographic orientations was obtained by the same procedure. A similar morphological transition from dendrites to equiaxed grains occurred at the equiaxed-grain region in Al1 alloy, but the annealing twins were not observed probably because a higher Al addition leads to a higher stacking fault energy for this alloy.

Ma, S. G.; Zhang, S. F.; Gao, M. C.; Liaw, P. K.; Zhang, Y.

2013-12-01T23:59:59.000Z

385

Kondo effect in the paramagnetic phase of CrFe alloy with the spin-density-wave suppressed by pressure or V doping  

SciTech Connect

The pressure dependence of the resistivity {rho}(T) of (Cr+2.7 at.{percent}Fe){sub 98}V{sub 2} is measured, following a previous study of the temperature dependence of {rho}(T) in the spin-density-wave (SDW) alloy system, (Cr+2.7 at.{percent} Fe){sub 1{minus}x}(V,Mn){sub x}. The minimum in {rho}(T) in the V-doped alloys seen at T{approx_gt}T{sub N} for x{gt}1 at.{percent} is found to move to lower temperatures under pressure p in the alloy containing 2 at.{percent} V, decreasing in magnitude, and eventually, as the Neel temperature T{sub N} goes to zero at p{approx}10 kbar, becoming a very shallow minimum followed by a maximum and a rapid decrease as T{r_arrow}4.2 K. This latter behavior in the paramagnetic phase is believed to be due to the Kondo effect, while the pressure dependent minimum in {rho}(T) in the SDW phase is a manifestation of impurity resonance scattering. {copyright} {ital 1997 American Institute of Physics.}

Galkin, V.Y.; de Camargo, P.C. [Physics Department of Federal University of Parana, Curitiba 81 531 990 (Brazil)] [Physics Department of Federal University of Parana, Curitiba 81 531 990 (Brazil); Budko, S.L.; Saitovitch, E.B. [CBPF, Rio de Janeiro (Brazil)] [CBPF, Rio de Janeiro (Brazil); Fawcett, E. [Physics Department of University of Toronto, Toronto M5S 1A7 (Canada)] [Physics Department of University of Toronto, Toronto M5S 1A7 (Canada)

1997-04-01T23:59:59.000Z

386

Spin dependent transport properties of Mn-Ga/MgO/Mn-Ga magnetic tunnel junctions with metal(Mg, Co, Cr) insertion layer  

SciTech Connect

We report a first principles theoretical investigation of spin polarized quantum transport in Mn{sub 2}Ga/MgO/Mn{sub 2}Ga and Mn{sub 3}Ga/MgO/Mn{sub 3}Ga magnetic tunneling junctions (MTJs) with the consideration of metal(Mg, Co, Cr) insertion layer effect. By changing the concentration of Mn, our calculation shows a considerable disparity in transport properties: A tunneling magnetoresistance (TMR) ratio of 852% was obtained for Mn{sub 2}Ga-based MTJs, however, only a 5% TMR ratio for Mn{sub 3}Ga-based MTJs. In addition, the influence of insertion layer has been considered in our calculation. We found the Co insertion layer can increase the TMR of Mn{sub 2}Ga-based MTJ to 904%; however, the Cr insertion layer can decrease the TMR by 668%; A negative TMR ratio can be obtained with Mg insertion layer. Our work gives a comprehensive understanding of the influence of different insertion layer in Mn-Ga based MTJs. It is proved that, due to the transmission can be modulated by the interfacial electronic structure of insertion, the magnetoresistance ratio of Mn{sub 2}Ga/MgO/Mn{sub 2}Ga MTJ can be improved by inserting Co layer.

Liang, S. H.; Tao, L. L.; Liu, D. P., E-mail: dpliu@iphy.ac.cn; Han, X. F., E-mail: xfhan@iphy.ac.cn [State Key Laboratory of Magnetism, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China); Lu, Y. [Institut Jean Lamour, UMR 7198, CNRS-Nancy Universit, BP 239, 54506 Vandoeuvre (France)

2014-04-07T23:59:59.000Z

387

Evaluation of 2.25Cr-1Mo Alloy for Containment of LiCl/KCl Eutectic during the Pyrometallurgical Processing of Used Nuclear Fuel  

SciTech Connect

Recovery of uranium from the Mk-IV and Mk-V electrorefiner vessels containing a LiCl/KCl eutectic salt has been on-going for 14 and 12 years, respectively, during the pyrometallurgical processing of used nuclear fuel. Although austenitic stainless steels are typically utilized for LiCl/KCl salt systems, the presence of cadmium in the Mk-IV electrorefiner dictates an alternate material. A 2.25Cr-1Mo alloy (ASME SA-387) was chosen due to the absence of nickel in the alloy which has a considerable solubility in cadmium. Using the transition metal impurities (iron, chromium, nickel, molybdenum, and manganese) in the electrorefined uranium products, an algorithm was developed to derive values for the contribution of the transition metals from the various input sources. Weight loss and corrosion rate data for the Mk-V electrorefiner vessel were then generated based on the transition metal impurities in the uranium products. To date, the corrosion rate of the 2.25Cr-1Mo alloy in LiCl/KCl eutectic is outstanding assuming uniform (i.e. non-localized) conditions.

B.R. Westphal; S.X. Li; G.L. Fredrickson; D. Vaden; T.A. Johnson; J.C. Wass

2011-03-01T23:59:59.000Z

388

Finite-element method simulation of effects of microstructure, stress state, and interface strength on flow localization and constraint development in Nb/Cr{sub 2}Nb in situ composites  

SciTech Connect

The effects of volume fraction of particles, stress state, and interface strength on the yield strength, flow localization, plastic constraint, and damage development in Nb/Cr{sub 2}Nb in situ composites were investigated by the finite-element method (FEM). The microstructure of the in situ composite was represented in terms of a unit rectangular or square cell containing Cr{sub 2}Nb particles embedded within a solid-solution-alloy matrix. The hard particles were considered to be elastic and isotropic, while the matrix was elastic-plastic, obeying the Ramberg-Osgood constitutive relation. The FEM model was utilized to compute the composite strength, local hydrostatic stress, and plastic strain distributions as functions of volume fraction of particles, stress state, and interface strength. The results were used to elucidate the influence of volume fracture of particles, stress state, and interface property on the development of plastic constraint and damage in Nb/Cr{sub 2}Nb composites.

Lin, G.; Chan, K.S.

1999-12-01T23:59:59.000Z

389

Fe-24 wt.%Cr-4.1 wt.%C hardfacing alloy: Microstructure and carbide refinement mechanisms with ceria additive  

SciTech Connect

The microstructure and carbide refinement mechanisms of Fe-24 wt.%Cr-4.1 wt.%C hardfacing alloys with 0 wt.%, 0.5 wt.%, 1.0 wt.%, 2 wt.%, and 4 wt.% ceria additives have been systematically investigated in this work. Optical microscopy, field emission scanning electron microscopy with energy dispersive spectrometer, and X-ray diffraction were collectively used to study the microstructure, the phase components, and the chemical formation of inclusion formed in the welding process. Wear-resistance of the alloys was comparatively studied using an abrasive wear testing machine. The structure analysis results show that the Fe-Cr-C hardfacing alloy mainly consists of martensite, retained austenite, MC carbide and M{sub 7}C{sub 3} carbide. With increasing ceria additive contents, the average size of the primary M{sub 7}C{sub 3} carbide decreases and reaches a most refined state in the alloy with 2 wt.% ceria additives. Comparative wear tests data shows that the wear resistance of the hardfacing alloys with ceria additives is better than that without ceria additive. In a good agreement with the carbide refinement results, the wear resistance of the alloy reaches an optimum level in the sample with 2 wt.% ceria additive. The main RE inclusion type identified with in-situ XRD analysis is RE inclusion Ce{sub 2}O{sub 2}S. Thermodynamics calculation confirms that this type of RE inclusion could precipitate prior to M{sub 7}C{sub 3} carbides, and act as a heterogeneous nucleus for M{sub 7}C{sub 3} in the welding process, which effectively provides a mechanism for significant refinement of the M{sub 7}C{sub 3} carbide and improves its wear resistance. - Graphical Abstract: Rare Earth inclusion (Ce{sub 2}O{sub 2}S) distributes in the primary M{sub 7}C{sub 3} carbide. Moreover, Ce{sub 2}O{sub 2}S, which acts as heterogeneous nuclei of the primary M{sub 7}C{sub 3} carbide, is medium effective. Therefore, the primary M{sub 7}C{sub 3} carbide has been refined. Highlights: Black-Right-Pointing-Pointer Micro-hardness of primary M{sub 7}C{sub 3} carbide in Fe-Cr-C hardfacing alloy is 1594 HV. Black-Right-Pointing-Pointer RE inclusion Ce{sub 2}O{sub 2}S can be observed in the primary M{sub 7}C{sub 3} carbide. Black-Right-Pointing-Pointer Ce{sub 2}O{sub 2}S as heterogeneous nuclei of the Cr{sub 7}C{sub 3} is medium effective. Black-Right-Pointing-Pointer Primary carbide is most refined with 2 wt.% ceria additive.

Zhou, Y.F.; Yang, Y.L.; Jiang, Y.W.; Yang, J. [State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004 (China)] [State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004 (China); Ren, X.J. [School of Engineering, Liverpool John Moores University, Liverpool L3 3AF (United Kingdom)] [School of Engineering, Liverpool John Moores University, Liverpool L3 3AF (United Kingdom); Yang, Q.X., E-mail: qxyang@ysu.edu.cn [State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004 (China)

2012-10-15T23:59:59.000Z

390

Effect of microstructural modification on tensile and fatigue properties of Cu-35wt%Ni-3. 5wt%Cr alloy  

SciTech Connect

Tensile and fatigue properties of Cu-35wt%Ni-3.5wt%Cr in four different material conditions have been investigated. It is shown that reduced grain size and enhanced dislocation density lead to an increase in tensile as well as fatigue strength of solution treated specimens. In the presence of precipitates, tensile properties are less dependent on grain size. Similar to tensile strength, LCF strength is improved by precipitation hardening. However, for large-grained material, the effect of precipitation hardening in the HCF region is reduced due to pronounced intergranular cracking. On the other hand, the intergranular cracking can be reduced by grain refinement, so that an improvement of HCF properties is then possible while taking advantage of precipitation hardening. Results obtained by TEM-investigation of deformed specimens are also discussed in connection with deformation behaviors of the material conditions.

Wang, G.X. (GKSS Research Center, Geesthacht (Germany). Inst. for Materials Research)

1994-07-01T23:59:59.000Z

391

Sr{sub 2}CrOsO{sub 6}: End point of a spin-polarized metal-insulator transition by 5d band filling  

SciTech Connect

In the search for new spintronic materials with high spin polarization at room temperature, we have synthesized an osmium-based double perovskite with a Curie temperature of 725 K. Our combined experimental results confirm the existence of a sizable induced magnetic moment at the Os site, supported by band-structure calculations, in agreement with a proposed kinetic-energy-driven mechanism of ferrimagnetism in these compounds. The intriguing property of Sr{sub 2}CrOsO{sub 6} is that it is at the end point of a metal-insulator transition due to 5d band filling and at the same time ferrimagnetism and high-spin polarization are preserved.

Krockenberger, Y. [Darmstadt University of Technology, Petersenstrasse 23, 64287 Darmstadt (Germany); Max-Planck-Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart (Germany); Mogare, K.; Jansen, M. [Max-Planck-Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart (Germany); Reehuis, M. [Max-Planck-Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart (Germany); Hahn-Meitner-Institut (HMI), 14109 Berlin (Germany); Tovar, M. [Hahn-Meitner-Institut (HMI), 14109 Berlin (Germany); Vaitheeswaran, G.; Kanchana, V. [Max-Planck-Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart (Germany); Department of Materials Science and Engineering, Royal Institute of Technology (KTH), 10044 Stockholm (Sweden); Bultmark, F. [Department of Physics, University of Uppsala, Box 530, 75121 Uppsala (Sweden); Delin, A. [Department of Materials Science and Engineering, Royal Institute of Technology (KTH), 10044 Stockholm (Sweden); Wilhelm, F.; Rogalev, A. [European Synchrotron Radiation Facility (ESRF), 6 Rue Jules Horowitz, Boite Postale 220, 38043 Grenoble Cedex 9 (France); Winkler, A.; Alff, L. [Darmstadt University of Technology, Petersenstrasse 23, 64287 Darmstadt (Germany)

2007-01-01T23:59:59.000Z

392

Microstructures and wear properties of TiN-based cermet coating deposited on 1Cr18Ni9Ti stainless steel by electrospark process  

Science Journals Connector (OSTI)

A simple and effective surface treatment technique, electrospark deposition (ESD), has been successfully applied to deposit TiN-based cermet coating on stainless steel substrate. The nitrided coating had an average thickness of about 30?m and formed metallurgical bonding with the substrate. The microstructure of the coating was mainly composed of TiN phase and ferrite (?-FeCr) phase. Its microhardness reached 889HV. The experimental results demonstrated that the nitrided coating had an excellent sliding wear resistance because the hard TiN phase distributed in the coating increased the resistance to micro-cutting and plowing during the sliding wear test, which effectively improves the surface performance of stainless steel substrate.

X. Li; D.Q. Sun; X.Y. Zheng; Z.A. Ren

2008-01-01T23:59:59.000Z

393

Soft X-ray reflectivity and structure evaluation of CoCr/C multilayer X-ray mirrors for spectral region around 6nm  

Science Journals Connector (OSTI)

The development of highly-reflective multilayer mirrors for use in the 6-nm region is desired for X-ray photoemission spectroscopy for inner-shell excitation using a Schwarzschild objective. For this application, reflectivity is the most critical parameter determining the performance of multilayer mirrors, because the reflectivities of multilayers in the 6-nm region are generally very low. We have designed CoCr/C multilayer mirrors with a comparatively high reflectivity at around normal incidence and have fabricated them by magnetron sputtering. The measured peak reflectivity is about 11.5% at a wavelength of around 6nm and an incident angle of 88. Thermal annealing was found to markedly improve the reflectivity, and a high value of 13% was obtained by annealing at 400 in an Ar atmosphere for 1h.

H. Takenaka; K. Nagai; H. Ito; Y. Muramatsu; T. Kawamura; E. Gullikson; R.C.C. Perera

2001-01-01T23:59:59.000Z

394

Metal-Centered 17-Electron Radicals CpM(CO)3 (M = Cr, Mo, W): A Combined Negative Ion Photoelectron Spectroscopic and Theoretical Study  

SciTech Connect

Despite the importance of group VI metal-centered 17-electron radicals CpM(CO)3 (Cp = 5-C5H5, M = Cr, Mo, W) in establishing many of the fundamental reactions now known for metal-centered radicals, spectroscopic characterization of their electronic properties and structures has been very challenging due to their high reactivity. Here we report a gas-phase study of these species by means of photodetachment photoelectron spectroscopy (PES) of their corresponding 18-electron anions and theoretical electronic structure calculations. Three well-separated spectral features are observed by PES for each anionic species. Electron affinities (EAs) of CpM(CO)3 were experimentally measured from the threshold of each spectrum to be 2.38 0.02 (M = Cr), 2.63 0.02 (Mo), and 2.63 0.01 eV for (W), well correlated with the reported redox potentials measured in solution. Theoretical calculations for all anionic and neutral (radical) species gave calculated EAs and band gaps that are in good agreement with the experimental data. Molecular orbital (MO) analyses for each anion indicate that the top three occupied MOs are mainly metal-based and contribute to the first spectral feature, whereas the next two MOs are largely from C5H5 moiety and contribute to the second spectral feature. The calculations further exhibit appreciable anion-to-neutral structural changes for all three species but with the change for the W species being the smallest, consistent with the W spectra being better resolved than the other two.

van der Eide, Edwin F.; Hou, Gao-Lei; Deng, Shihu; Wen, Hui; Yang, Ping; Bullock, R. Morris; Wang, Xue B.

2013-04-08T23:59:59.000Z

395

CR@B, or `cancer research at Bath', is a network that facilitates interaction between departments and institutes to allow multi-disciplinary activities in the field of cancer  

E-Print Network (OSTI)

CR@B, or `cancer research at Bath', is a network that facilitates interaction between departments and institutes to allow multi-disciplinary activities in the field of cancer research. The network provides groups, promoting opportunities for interdisciplinary research and raising awareness of cancer research

Burton, Geoffrey R.

396

Bull. Mater. Sci., Vol. 37, No. 1, February 2014, pp. 7782. c Indian Academy of Sciences. NbCl5 and CrCl3 catalysts effect on synthesis and hydrogen storage  

E-Print Network (OSTI)

and CrCl3 catalysts effect on synthesis and hydrogen storage performance of Mg­Ni­NiO composites QI WAN on hydrogen storage performance were investigated. A microstructure analysis showed that besides the main Mg storage; Mg-based materials; hydrogen storage performance; catalyst. 1. Introduction There is a great

Volinsky, Alex A.

397

Influence of a Cerium Surface Treatment on the Oxidation Behavior of Cr2O3-Forming Alloys (title on slides varies: Oxidation Behavior of Cerium Surface Treated Chromia Forming Alloys)  

SciTech Connect

Current goals of the U.S. Department of Energys Advanced Power Systems Initiatives include coal generation at 60% efficiency, which would require steam temperatures of up to 760C. This temperature will require the construction of boiler and turbine components from austenitic stainless steels and nickel alloys. Many of the alloys being considered for use are primarily Cr2O3 forming alloys [1-4]. It is well known that the addition of a small amount of reactive elements, such as the rare earths elements Ce, La, and Y, can significantly improve the high temperature oxidation resistance of both iron- and nickel- base alloys. A list of the benefits of the reactive element effect include: (i) slowing scale growth, (ii) enhancing scale adhesion; and (iii) stabilizing Cr2O3 formation at lower Cr levels. The incorporation of the reactive element can be made in the melt or through a surface infusion or surface coating. Surface modifications allow for the concentration of the reactive element at the surface where it can provide the most benefit. This paper will detail a Ce surface treatment developed at NETL that improves the high temperature oxidation resistance of Cr2O3 forming alloys. The treatment consists of painting, dip coating, or spraying the alloy surface with a slurry containing CeO2 and a halide activator followed by a thermal treatment in a mild (x10-3 Torr) vacuum. During treatment the CeO2 reacts with the alloy to for a thin CrCeO3-type scale on the alloy surface. Upon subsequent oxidation, scale growth occurs at a reduced rate on alloys in the surface treated condition compared to those in the untreated condition.

Alman, D.E.; Holcomb, G.R.; Adler, T.A.; Jablonski, P.D.

2007-04-01T23:59:59.000Z

398

High-resolution diffraction for residual stress determination in the NiCrMoV wheel of an axial compressor for a heavy-duty gas turbine  

Science Journals Connector (OSTI)

The wheel of an axial compressor for a heavy-duty gas turbine has been investigated for residual stresses (RS) evaluation of the teeth-section where SANS measurements have previously been performed. Such a component can contain internal RS, either due to the manufacturing process, or to the operating cycles fatigue. The constitutive material is a NiCrMoV steel to ASTM A 471 (type 2) norms (equivalent to B50A420B10); this material is usually adopted in the manufacturing of forged components for gas turbines. Internal radial and hoop RS have been determined, whose values are under the limit of 200kPa. Hoop RS, in general, resulted in higher value than the radial ones. The present experiment represents a particularly important step in the RS determination for gas turbine components, since the measurements reveal that the fatigue of the wheel is also a lifetime limiting factor although, in the same technological field, the available data in the actual neutron techniques literature mainly concern turbine buckets.

M Rogante; G Trk; G.F Ceschini; L Tognarelli; I Fzesy; L Rosta

2004-01-01T23:59:59.000Z

399

Tensile properties and strain rate sensitivity of Ti-47Al-2Cr-0.2Si sheet material with different microstructures  

SciTech Connect

New materials based on gamma titanium aluminides (gamma alloys) have emerged as potential candidates for high temperature applications such as aerospace structural components (e.g., airframes, turbine components, thermal protection systems) and automotive parts (e.g., exhaust valves, turbocharger rotors). Because of their low density, high Young`s modulus, high-temperature strength retention, good oxidation and burn resistance, the so-called second generation gamma alloys are able to exceed the application temperature of advanced titanium alloys and also to replace nickel- and iron-based superalloys up to 800C. However, poor formability and low room temperature (RT) ductility resulting in low fracture toughness have limited possible applications. The present paper deals with the dependence of tensile properties of Ti-47Al-2Cr-0.2Si (composition in atomic-%) sheet material on microstructure and test conditions. Four different microstructures, i.e., fine-grained primary annealed (PA), near gamma (NG), duplex (DU) as well as coarse-grained fully lamellar (FL) have been investigated with emphasis on the influence of grain size, phase distribution, and strain rate on tensile properties at 700 C. Fractography was conducted by scanning electron microscopy (SEM) to examine the influence of temperature on the fracture behavior and to determine the onset of dynamic recrystallization effects.

Clemens, H. [Plansee AG, Reutte (Austria)] [Plansee AG, Reutte (Austria); Glatz, W. [Montanuniversitaet, Leoben (Austria). Inst. fuer Metallkunde und Werkstoffpruefung] [Montanuniversitaet, Leoben (Austria). Inst. fuer Metallkunde und Werkstoffpruefung; Appel, F. [GKSS Research Centre, Geesthacht (Germany). Inst. for Materials Research] [GKSS Research Centre, Geesthacht (Germany). Inst. for Materials Research

1996-08-01T23:59:59.000Z

400

The new ductile fracture criterion for 30Cr2Ni4MoV ultra-super-critical rotor steel at elevated temperatures  

Science Journals Connector (OSTI)

Abstract In this paper a new ductile fracture criterion was derived by taking into account the plastic deformation capacity of material and stress states, which can be used to describe fracture behavior and critical rupture conditions of 30Cr2Ni4MoV ultra-super-critical rotor steel during hot forging process. In order to establish this criterion, the tensile tests at different temperatures and strain rates were firstly conducted on Gleeble-1500 thermo-mechanical simulator, and then a measurement and conversion method was applied to estimate the equivalent fracture strain ? f that represents the deformation capacity of material in ductile fracture process. Experimental results indicated that ? f greatly depends on the temperature and strain rate. A model of ? f as a function of the temperature and strain rate was also established. To validate the proposed fracture criterion, additionally, the simulation of tensile test and the fractographic observation of the tensile specimen were conducted. The upsetting tests that possess different stress states and the corresponding numerical simulations were also performed. These results show that the developed criterion can accurately predict the cracks initiation and the location of the cracks at elevated temperatures.

Jianli He; Zhenshan Cui; Fei Chen; Yanhong Xiao; Liqun Ruan

2013-01-01T23:59:59.000Z

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401

Magnetism, half-metallicity and electrical transport properties of V- and Cr-doped semiconductor SnTe: A theoretical study  

SciTech Connect

This work presents results for the electronic structure, magnetic properties, and electrical resistivity of the semiconductor SnTe doped with 3d transition metals V and Cr. From the standpoint of potential application in spintronics, we look for half-metallic states and analyze their properties in both rock salt and zinc blende structures using ab initio electronic structure methods. In both cases, it is the Sn-sublattice that is doped with the transition metals, as has been the case with experiments performed so far. We find four half-metallic compounds at their optimized cell volumes. Results of exchange interactions and the Curie temperature are presented and analyzed for all the relevant cases. Resistivity calculation based on Kubo-Greenwood formalism shows that the resistivities of these alloys due to transition metal doping of the Sn-sublattice may vary, in most cases, from typical liquid metal or metallic glass value to 23 times higher. 25% V-doping of the Sn-sublattice in the rock salt structure gives a very high resistivity, which can be traced to high values of the lattice parameter resulting in drastically reduced hopping or diffusivity of the states at the Fermi level.

Liu, Y. [State Key laboratory of Metastable Materials Science and Technology and College of Science, Yanshan University, Qinhuangdao, Hebei 066004 (China); Bose, S. K. [Physics Department, Brock University, St. Catharines, Ontario L2S 3A1 (Canada); Kudrnovsk, J. [Institute of Physics, Academy of the Sciences of the Czech Republic, Na Slovance 2, 182 21 Prague 8 (Czech Republic)

2013-12-07T23:59:59.000Z

402

Elevated-Temperature Corrosion of CoCrCuFeNiAl0.5Bx High-Entropy Alloys in Simulated Syngas Containing H2S  

SciTech Connect

High-entropy alloys are formed by synthesizing five or more principal elements in equimolar or near equimolar concentrations. Microstructure of the CoCrCuFeNiAl{sub 0.5}B{sub x} (x = 0, 0.2, 0.6, 1) high-entropy alloys under investigation is composed of a mixture of disordered bcc and fcc phases and borides. These alloys were tested gravimetrically for their corrosion resistance in simulated syngas containing 0, 0.01, 0.1, and 1 % H{sub 2}S at 500 C. The exposed coupons were characterized using XRD and SEM. No significant corrosion was detected at 500 C in syngas containing 0 and 0.01 % H{sub 2}S while significant corrosion was observed in syngas containing 0.1 and 1 % H{sub 2}S. Cu{sub 1.96}S was the primary sulfide in the external corrosion scale on the low-boron high-entropy alloys, whereas FeCo{sub 4}Ni{sub 4}S{sub 8} on the high-boron high-entropy alloys. Multi-phase Cu-rich regions in the low-B high-entropy alloys were vulnerable to corrosive attack.

Dogan, Omer N.; Nielsen, Benjamin C.; Hawk, Jeffrey A.

2013-08-01T23:59:59.000Z

403

Experimental and theoretical analysis of a nondispersive solvent extraction pilot plant for the removal of Cr(VI) from a galvanic process wastewaters  

SciTech Connect

The scale-up of a chemical process from the results obtained in a laboratory scale involves a high degree of uncertainty. Experimental tests in pilot plants are therefore necessary in order to decrease that uncertainty. When the processes are not simple, these experimental tests should be supplemented by simulation studies which are a highly useful tool in the analysis of a chemical plant. A nondispersive solvent extraction (NDSX) plant includes two processes, extraction and stripping, coupled by an organic phase. Because of this fact, the variables of the system are interrelated, making the prediction of the behavior of the whole system difficult. Because of this complexity, in this work, the behavior of a NDSX pilot plant has been experimentally and theoretically analyzed. The removal and recovery of chromium(VI) from wastewaters of a galvanic process have been used as a case study for the simulation and experimental analysis of the NDSX process. The mathematical model consists of nonlinear partial differential equations which are solved using the process simulator gPROMS. Once the suitability of the proposed model and parameters for the description of removal and concentration of Cr(VI) in the NDSX pilot plant was checked, the simulation was used to perform a sensitivity analysis to operating variables such as flow rates, volumes, total carrier concentration, and initial complex species concentration. The theoretically predicted behavior was checked with some experimental results, and a satisfactory performance of the pilot plant was achieved.

Alonso, A.I.; Galan, B.; Gonzalez, M.; Ortiz, I. [Univ. de Cantabria, Santander (Spain). Dept. Quimica] [Univ. de Cantabria, Santander (Spain). Dept. Quimica

1999-04-01T23:59:59.000Z

404

Microporous Montmorillonites Expanded with Alumina Clusters and M[(?-OH)Cu(?-OCH2CH2NEt2)]6(ClO4)3, (M = Al, Ga, and Fe), or Cr[(?-OCH3)(?-OCH2CH2NEt2)CuCl]3 Complexes  

Science Journals Connector (OSTI)

Mossbauer results have indicated that only Fe3+ in octahedral coordination is present in the iron-containing bi-PILC samples (bi-PILC = bipillared interlayered clays). ... In contrast, the intermediate Al13-PILC structure is least affected when the more stable Cr complex is used. ... Bi-PILC materials containing 2.7?3.4% Cr stable to 500 C have been obtained. ...

S. M. Thomas; J. A. Bertrand; M. L. Occelli; F. Huggins; S. A. C. Gould

1999-04-09T23:59:59.000Z

405

Modeling the effect of irradiation and post-irradiation annealing on grain boundary composition in austenitic Fe-Cr-Ni alloys.  

SciTech Connect

Many irradiation effects in Fe-Cr-Ni alloys such as radiation-induced segregation, radiation-enhanced diffusion, and void swelling are known to vary with bulk alloy composition. The development of microstructural and microchemical changes during irradiation and during post-irradiation annealing is determined by the rate of diffusion of point defects and alloying elements. To accurately predict the changes in grain boundary chemistry due to radiation-induced segregation and post-irradiation annealing, the composition dependence of diffusion parameters, such as the migration energy, must be known. A model has been developed which calculates migration diffusivity. The advantages of this calculational method are that a single set of input parameters can be used for a wide range of bulk alloy compositions, and the effects of local order can easily be incorporated into the calculations. A description of the model is presented, and model calculations are compared to segregation measurements from seven different iron-chromium-nickel alloys, irradiated with protons to doses from 0.1 to 3.0 dpa at temperatures between 200 C and 600 C. Results show that segregation trends can be modeled using a single set of input parameters with the difference between model calculation and measurement being less than 5 at%, but usually less than 2 at%. Additionally, model predictions are compared to grain boundary composition measurements of neutron irradiated 304 stainless steel following annealing. For the limited annealing data available, model calculations correctly predict the magnitude and time scale for recovery of the grain boundary composition.

Allen, T.; Busby, J. T.; Kenik, E. A.; Was, G. S.

1998-03-05T23:59:59.000Z

406

Comparison of the effects of long-term thermal aging and HFIR irradiation on the microstructural evolution of 9Cr-1MoVNb steel  

SciTech Connect

Both thermal aging at 482--704{degree}C for up to 25,000h and HFIR irradiation at 300--600{degree}C for up to 39 dpa produce substantial changes in the as-tempered microstructure of 9Cr-1MoVNb martensitic/ferritic steel. However, the changes in the dislocation/subgrain boundary and the precipitate structures caused by thermal aging or neutron irradiation are quite different in nature. During thermal aging, the as-tempered lath/subgrain boundary and carbide precipitate structures remain stable below 650{degree}C, but coarsen and recover somewhat at 650--704{degree}C. The formation of abundant intergranular Laves phase, intra-lath dislocation networks, and fine dispersions of VC needles are thermal aging effects that are superimposed upon the as-tempered microstructure at 482--593{degree}C. HFIR irradiation produces dense dispersions of very small black-dot'' dislocations loops at 300{degree}C and produces helium bubbles and voids at 400{degree}C At 300--500{degree}C, there is considerable recovery of the as-tempered lath/subgrain boundary structure and microstructural/microcompositional instability of the as-tempered carbide precipitates during irradiation. By contrast, the as-tempered microstructure remains essentially unchanged during irradiation at 600{degree}C. Comparison of thermally aged with irradiation material suggests that the instabilities of the as-tempered lath/subgrain boundary and precipitate structures at lower irradiation temperatures are radiation-induced effects, whereas the absence of both Laves phase and fine VC needles during irradiation is a radiation-retarded thermal effect.

Maziasz, P.J.; Klueh, R.L.

1990-01-01T23:59:59.000Z

407

Mobility of Source Zone Heavy Metals and Radionuclides: The Mixed Roles of Fermentative Activity on Fate and Transport of U and Cr. Final Report  

SciTech Connect

Various U. S. Department of Energy (DOE) low and medium-level radioactive waste sites contain mixtures of heavy metals, radionuclides and assorted organic materials. In addition, there are numerous sites around the world that are contaminated with a mixture of organic and inorganic contaminants. In most sites, over time, water infiltrates the wastes, and releases metals, radionuclides and other contaminants causing transport into the surrounding environment. We investigated the role of fermentative microorganisms in such sites that may control metal, radionuclide and organics migration from source zones. The project was initiated based on the following overarching hypothesis: Metals, radionuclides and other contaminants can be mobilized by infiltration of water into waste storage sites. Microbial communities of lignocellulose degrading and fermenting microorganisms present in the subsurface of contaminated DOE sites can significantly impact migration by directly reducing and immobilizing metals and radionuclides while degrading complex organic matter to low molecular weight organic compounds. These low molecular weight organic acids and alcohols can increase metal and radionuclide mobility by chelation (i.e., certain organic acids) or decrease mobility by stimulating respiratory metal reducing microorganisms. We demonstrated that fermentative organisms capable of affecting the fate of Cr6+, U6+ and trinitrotoluene can be isolated from organic-rich low level waste sites as well as from less organic rich subsurface environments. The mechanisms, pathways and extent of contaminant transformation depend on a variety of factors related to the type of organisms present, the aqueous chemistry as well as the geochemistry and mineralogy. This work provides observations and quantitative data across multiple scales that identify and predict the coupled effects of fermentative carbon and electron flow on the transport of radionuclides, heavy metals and organic contaminants in the subsurface; a primary concern of the DOE Environmental Remediation Science Division (ERSD) and Subsurface Geochemical Research (SBR) Program.

Gerlach, Robin [Montana State Univ., Bozeman, MT (United States); Peyton, Brent M. [Montana State Univ., Bozeman, MT (United States); Apel, William A. [Idaho National Lab., Idaho Falls, ID (United States)

2014-01-29T23:59:59.000Z

408

Version 12 Nov 2012 Semester 1 Cr Semester2 Cr  

E-Print Network (OSTI)

and GPS 4 SFR 215 - Introduction to Bioproducts & Bioenergy 3 ECO 121 - Principles of Macroeconomics 3 SFR related to FBB; approved by advisor 3 SFR 464 - Forest Resources Business, Marketing, & Entrepreneurs 3 Elective & General Education Courses: 8 SFR 455 - Bioenergy Sources, Systems, and Environmental Effects

Thomas, Andrew

409

Version April 2, 2013 Semester 1 Cr Semester2 Cr  

E-Print Network (OSTI)

- Geomatics, Coordinate Geometry and GPS 4 SFR 215 - Introduction to Bioproducts & Bioenergy 3 SFR 228 Resources Business, Marketing, & Entrepreneurship 3 ENG 317 - Technical Writing 3 SFR 492 - Capstone/534 - Recreation Site Planning and Management 3 SFR 455 - Bioenergy Sources, Systems, and Environmental Effects

Thomas, Andrew

410

Version 12 Nov 2012 Semester 1 Cr Semester2 Cr  

E-Print Network (OSTI)

- Geomatics, Coordinate Geometry and GPS 4 SFR 215 - Introduction to Bioproducts & Bioenergy 3 SFR 228 Resources Business, Marketing, & Entrepreneurs 3 ENG 317 - Technical Writing 3 SFR 492 - Capstone Directed/534 - Recreation Site Planning and Management 3 SFR 455 - Bioenergy Sources, Systems, and Environmental Effects

Thomas, Andrew

411

Version 9 April 2013 Semester 1 Cr Semester2 Cr  

E-Print Network (OSTI)

- Geomatics, Coordinate Geometry and GPS 4 SFR 215 - Introduction to Bioproducts & Bioenergy 3 ECO 121 Elective - Elective related to FBB; approved by advisor 3 SFR 464 - Forest Resources Business, Marketing, & Entrepreneurship 3 Elective & General Education Courses: 8 SFR 455 - Bioenergy Sources, Systems, and Environmental

Thomas, Andrew

412

18246_Primer_Winter09_CR:CR  

NLE Websites -- All DOE Office Websites (Extended Search)

Nearly 2,000 microbes Nearly 2,000 microbes have been sequenced out of the estimated nonillion (10 30 ) in, on and around the Earth. And while the information is significantly impacting almost all aspects of microbiology, said DOE JGI Phylogenomics Program Head and University of California, Davis professor Jonathan Eisen, it is bypassing the ribosomal RNA Tree of Life, which allows researchers to track and understand how organ- isms are related to each other. "We've done a very poor job of sampling across the tree in microbial studies," said Eisen. "If you look at phylogenetic diversity in the bacterial king- dom, most of the available genomes come from just 3 of the 40 major phyla. The same trend holds for archaea, eukaryotes and viruses. The solution is to use the tree to guide us, going through phylo-

413

BES_ESnet_Cover_CR  

NLE Websites -- All DOE Office Websites (Extended Search)

Network Requirements Network Requirements Report of the Basic Energy Sciences Network Requirements Workshop Conducted September 22 and 23, 2010 ESnet Energy Sciences Network 2 DISCLAIMER This document was prepared as an account of work sponsored by the United States Government. While this document is believed to contain correct information, neither the United States Government nor any agency thereof, nor The Regents of the University of California, nor any of their employees, makes any warranty, express or implied, or assumes any legal responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by its trade name,

414

10897_JGI_Progress_CR  

NLE Websites -- All DOE Office Websites (Extended Search)

Progress Report 2002-2005 Progress Report 2002-2005 U.S. DEPARTMENT OF ENERGY JOINT GENOME INSTITUTE JGI's Mission To develop and exploit new sequencing and other high-throughput, genome-scale, and computational technologies as a means for discovering and charac- terizing the basic principles and relationships underly- ing the organization, function, and evolution of living systems. What is Sequencing? Just as computer software is rendered in long strings of 0s and 1s, the "software" of life is represented by a string of four chemicals, abbreviated as A, T, C, and G. To understand the software of either a computer or a living organism, we must know the order, or sequence, of these informative bits. JGI PROGRESS REPORT 2002-2005 * TABLE OF CONTENTS table of contents Director's Perspective

415

Development of Advanced Corrosion-Resistant Fe-Cr-Ni Austenitic Stainless Steel Alloy with Improved High Temperature Strenth and Creep-Resistance  

SciTech Connect

In February of 1999, a Cooperative Research and Development Agreement (CRADA) was undertaken between Oak Ridge National Laboratory (ORNL) and Special Metals Corporation-Huntington Alloys (formerly INCO Alloys International, Inc.) to develop a modified wrought austenitic stainless alloy with considerably more strength and corrosion resistance than alloy 800H or 800HT, but with otherwise similar engineering and application characteristics. Alloy 800H and related alloys have extensive use in coal flue gas environments, as well as for tubing or structural components in chemical and petrochemical applications. The main concept of the project was make small, deliberate elemental microalloying additions to this Fe-based alloy to produce, with proper processing, fine stable carbide dispersions for enhanced high temperature creep-strength and rupture resistance, with similar or better oxidation/corrosion resistance. The project began with alloy 803, a Fe-25Cr-35NiTi,Nb alloy recently developed by INCO, as the base alloy for modification. Smaller commercial developmental alloy heats were produced by Special Metals. At the end of the project, three rounds of alloy development had produced a modified 803 alloy with significantly better creep resistance above 815EC (1500EC) than standard alloy 803 in the solution-annealed (SA) condition. The new upgraded 803 alloy also had the potential for a processing boost in that creep resistance for certain kinds of manufactured components that was not found in the standard alloy. The upgraded 803 alloy showed similar or slightly better oxidation and corrosion resistance relative to standard 803. Creep strength and oxidation/corrosion resistance of the upgraded 803 alloy were significantly better than found in alloy 800H, as originally intended. The CRADA was terminated in February 2003. A contributing factor was Special Metals Corporation being in Chapter 11 Bankruptcy. Additional testing, further commercial scale-up, and any potential invention disclosures were not pursued. One objective of this project was to improve the high temperature creep resistance of the recently developed 803 alloy, while another was to have a wrought modified 803 alloy with significantly better creep resistance and corrosion resistance than the commonly used alloy 800H. The project was intended to use the established expertise at ORNL to design specific microalloying element additions to appropriately tailor the microstructure during aging or creep so that fine, stable carbides develop for strength. If possible, oxidation/corrosion resistance at high temperatures would also be enhanced. Optimum processing was to be developed for plate and tube products.

Maziasz, PJ

2004-09-30T23:59:59.000Z

416

E-Print Network 3.0 - active endoribonuclease activity Sample...  

NLE Websites -- All DOE Office Websites (Extended Search)

a type I ER transmembrane receptor kinaseendoribonuclease... . IRE1 senses ER protein folding needs through its luminal domain. Prior to UPR activation, IRE1 is held......

417

Characterization of corrosion products formed on Ni 2.4wt%Cu 0.5wt%Cr 0.5wt% weathering steel exposed in marine atmospheres  

Science Journals Connector (OSTI)

Abstract Weathering steel manufactured with high concentrations of copper (0.5wt%), chromium (0.5wt%) and nickel (2.4wt%) was studied with the aim of furthering knowledge on corrosion product characterization and performance in marine environments. Specimens exposed for two years in a rural atmosphere and two marine environments were characterized by optical microscopy, SEM/EDS, XRD and Raman spectroscopy and corrosion rates measured. The main phases found were ferrihydrite, maghemite and goethite in the inner corrosion layer, and lepidocrocite in the outer layer. Cu and Ni were homogeneously distributed while Cr tended to be concentrated in the inner layer.

Heidis Cano; Delphine Neff; Manuel Morcillo; Philippe Dillmann; Ivn Diaz; Daniel de la Fuente

2014-01-01T23:59:59.000Z

418

Enhancement of spin-asymmetry by L2{sub 1}-ordering in Co{sub 2}MnSi/Cr/Co{sub 2}MnSi current-perpendicular-to-plane magnetoresistance devices  

SciTech Connect

Co{sub 2}MnSi/Cr/Co{sub 2}MnSi (001)-fully epitaxial current-perpendicular-to-plane giant magnetoresistance (CPP-GMR) devices were fabricated via an UHV magnetron sputtering system. The relationship between the degree of chemical ordering in Co{sub 2}MnSi (CMS) and the CPP-GMR characteristics was investigated systematically against the annealing temperature of the devices. X-ray diffraction profiles and reflection high-energy electron diffraction images indicated that annealing improved L2{sub 1}-ordering. The MR ratio also increased upon annealing and the maximum MR ratio of 5.2% and {delta}RA of 6.5 m{omega} {mu}m{sup 2} were achieved by annealing at 400 deg. C. These results indicate that promoting the degree of L2{sub 1}-ordering in CMS enhances the bulk and/or interface spin-asymmetry coefficients.

Sakuraba, Y.; Iwase, T.; Saito, K.; Mitani, S.; Takanashi, K. [Institute for Materials Research, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577 (Japan)

2009-01-05T23:59:59.000Z

419

Synthetic, Cyclic Voltammetric, Structural, EPR, and UV?Vis Spectroscopic Studies of Thienyl-Containing meso-A2B-cor(CrV?O) Systems: Consideration of Three Interrelated Molecular Detection Modalities  

Science Journals Connector (OSTI)

Synthetic, Cyclic Voltammetric, Structural, EPR, and UV?Vis Spectroscopic Studies of Thienyl-Containing meso-A2B-cor(CrV?O) Systems: Consideration of Three Interrelated Molecular Detection Modalities ... In the case of metal complexes, there are two one-electron reversible redox processes: a ligand-based oxidation corresponding to the corrole/corrole ?-radical cation (ligand/ligand+) couple and a metal-based reduction corresponding to the metaln/metaln?1 couple. ... The material properties are, in the case of corrole, confined to the single mol., while in the case of sapphyrin, a build-up process seems to take place, so that many monolayers are necessary to establish the bulk material properties. ...

Olga A. Egorova; Olga G. Tsay; Snehadrinarayan Khatua; Bhupal Meka; Nilkamal Maiti; Min-Kyu Kim; Seong Jung Kwon; Jung Oh Huh; Daniela Bucella; Sa-Ouk Kang; Juhyoun Kwak; David G. Churchill

2009-12-17T23:59:59.000Z

420

Cr3+Co0.054Ni0.018Mg0.93O Solid-Solution Catalysts for High-Pressure Syngas Production: Effect of Chromium on the Reduction and Catalysis  

Science Journals Connector (OSTI)

Cr3+Co0.054Ni0.018Mg0.93O Solid-Solution Catalysts for High-Pressure Syngas Production: Effect of Chromium on the Reduction and Catalysis ... (1) Reforming CH4 with CO2 (CH4 + CO2 ? 2H2 + 2CO) or H2O (CH4 + H2O ? 3H2 + CO) to produce syngas (CO + H2) is attracting renewed attention because advances in shale gas technology have increased the global supply of recoverable CH4(2-6) and because the process consumes CO2, a global warming gas. ... US natural gas emissions produced in the year 2008, prior to any significant Marcellus shale development. ...

Katsutoshi Nagaoka; Yosuke Abe; Yusaku Hashimoto; Takahiro Ishikawa; Katsutoshi Sato; Yusaku Takita; Toshiya Wakatsuki; Masahiro Kunisu; Eri Suda; Shin Inamoto

2013-05-27T23:59:59.000Z

Note: This page contains sample records for the topic "ire cr eek" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
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421

Dependence of corrosion resistance of Fe{sub 2}O{sub 3}-Cr{sub 2}O{sub 3} artificial passivation films on crystal structure and chemical state of constituent elements of the films  

SciTech Connect

Fe{sub 2}O{sub 3}-Cr{sub 2}O{sub 3} artificial passivation films were formed on Pt substrates by low pressure metal organic chemical vapor deposition technique using iron(III) acetylacetonate [Fe(O{sub 2}C{sub 5}H{sub 7}){sub 3}] and chromium(III) acetylacetonate [Cr(O{sub 2}C{sub 5}H{sub 7}){sub 3}] as precursors at substrate temperatures on 150--350 C. Relationships between the crystal structure, and also the chemical state of constituent elements, and the corrosion resistance were examined on the films in acid solutions. The films deposited above 300 C had crystalline structures, and those deposited below 250 C had amorphous structures. The films deposited above 250 C had a high amount of M-O-type chemical bonds, and those deposited below 200 C had a high amount of M-OH-type chemical bonds. The films deposited above 300 C hardly dissolved in 1.0 M HCl and those deposited below 250 C, however, easily dissolved in the solution. The dissolution rate of the films in the solution increased with decreasing substrate temperature. Passive and transpassive current densities of the films in 1.0 M H{sub 2}SO{sub 4} were dependent on the substrate temperature and increased with decreasing the temperature. When polarized cathodically in 1.0 M H{sub 2}SO{sub 4} and 0.5 M HCl, the films deposited below 250 C dissolved due to the reduction of the Fe{sub 2}O{sub 3} component in the films. The reduction of Fe{sub 2}O{sub 3} component was, however, suppressed on the films deposited above 300 C. Therefore, with increasing crystallinity and amount of M-O-type chemical bonds, the corrosion resistance of the films increases in HCl and H{sub 2}SO{sub 4} solutions.

Kim, Hyunsoo; Hara, Nobuyoshi; Sugimoto, Katsuhisa

1999-10-01T23:59:59.000Z

422

Nickel Alloy, Corrosion and Heat-Resistant, Sheet, Strip, and Plate 72Ni - 15.5Cr - 0.95 (Cb (Nb) + Ta) - 2.5Ti - 0.70Al - 7.0Fe Consumable Electrode, Remelted or Vacuum Induction Melted, Solution Heat Treated, Precipitation-Hardenable  

E-Print Network (OSTI)

Nickel Alloy, Corrosion and Heat-Resistant, Sheet, Strip, and Plate 72Ni - 15.5Cr - 0.95 (Cb (Nb) + Ta) - 2.5Ti - 0.70Al - 7.0Fe Consumable Electrode, Remelted or Vacuum Induction Melted, Solution Heat Treated, Precipitation-Hardenable

SAE Aerospace Standards. London

2012-01-01T23:59:59.000Z

423

Lawrence Co. Scioto Co. Greenup Co. Jack  

U.S. Energy Information Administration (EIA) Indexed Site

COWEN COWEN BELLS F OR D FREDVILLE BIG CH IMNEY ALVIN N RPD-LAWRENC E-2 PEYTONA-EMMON S TOM PR ICE SCHOOL NE BREEDEN MAR E CREEK SCHOOL FAR LEY C HUR CH W LON G R UN LICKBURG RPD-GALLIA-1 MIMA LEF T F OR K RPD-MASON-1 MABSCOT T-CBM CON LEY MEAD E BR ANCH PET ERSBURG VAN LEAR SILVERTON RPD-SC IOT O-2 HURR ICANE CR EEK OT TER ROAD BRANCH SH AVERS FORK HAGERH ILL KEEL FORK CRAGER FORK CON TRARY BRAN CH HUNN EWELL S DUMPS CREEK DOBSON SCH OOL BU LAN DANIEL HINDMAN N LAU REL HILL CROOK PYR AMI D AU XIER LEF T F OR K B CUCU MBER CRK CHANEY CREEK DINGUS RPD-SC IOT O-3 MOORE BRANC H RPD-TAZ EWELL-1 PORT ER CAMP MOU SIE WILD CAT HOLLOW SPR ING CREEK RACCOON SCHOOL ALVIN W ROSC OE GEORGES F ORK DAVISPOR T N LEATH ER BAR K CRK MOON N RPD-673 RPD-678 RPD-520 RPD-334 RPD-335 RPD-510 RPD-100 RPD-333 RPD-509 RPD-280 MAL DEN SALYERSVILLE FAR LEY C HUR CH CEREDO LINCOLN ST RAT TON KNOB SALLY BR ANCH

424

Richard Gerber! NERSC Senior Science Advisor  

NLE Websites -- All DOE Office Websites (Extended Search)

Advisor HPCOR 2014 Enabling Data-Driven Scientific Discovery at DOE National Laboratories --- 1 --- June 1 8, 2 014 --- 2 --- HPCOR 2 014 s eeks t o h elp HPC f acili7es d evelop...

425

Nanocrystallization in spark plasma sintered Fe{sub 48}Cr{sub 15}Mo{sub 14}Y{sub 2}C{sub 15}B{sub 6} bulk amorphous alloy  

SciTech Connect

Spark plasma sintering (SPS) is evolving as an attractive process for the processing of multi-component Fe-based bulk amorphous alloys and their in-situ nanocomposites with controlled primary nanocrystallization. Extended Q-range small angle neutron scattering (EQ-SANS) analysis, complemented by x-ray diffraction and transmission electron microscopy, was performed to characterize nanocrystallization behavior of SPS sintered Fe-based bulk amorphous alloys. The SANS experiments show significant scattering for the samples sintered in the supercooled region indicating local structural/compositional changes associated with the profuse nucleation of nanoclusters (?4 nm). For the samples spark plasma sintered near and above crystallization temperature (>653 C), the SANS data show the formation of interference maximum indicating the formation and growth of (Fe,Cr){sub 23}C{sub 6} crystallites. The SANS data also indicate the evolution of bimodal crystallite distribution at higher sintering temperatures (above T{sub x1}). The growth of primary nanocrystallites results in impingement of concentration gradient fields (soft impingement effect), leading to non-random nucleation of crystallites near the primary crystallization.

Singh, Ashish; Harimkar, Sandip P. [School of Mechanical and Aerospace Engineering, Oklahoma State University, Stillwater, Oklahoma 74078 (United States)] [School of Mechanical and Aerospace Engineering, Oklahoma State University, Stillwater, Oklahoma 74078 (United States); Katakam, Shravana; Dahotre, Narendra B. [Department of Materials Science and Engineering, University of North Texas, Denton, Texas 76203 (United States)] [Department of Materials Science and Engineering, University of North Texas, Denton, Texas 76203 (United States); Ilavsky, Jan [Advanced Photon Source, Argonne National Laboratory, Chicago, Illinois 60439 (United States)] [Advanced Photon Source, Argonne National Laboratory, Chicago, Illinois 60439 (United States)

2013-08-07T23:59:59.000Z

426

Magnetic structure and spin reorientation in the ternary sulfides, Ni{sub x}Cr{sub 3-x}S{sub 4} (x = 1/4, 1/2, 3/4)  

SciTech Connect

Powder neutron diffraction data for Ni{sub x}Cr{sub 3-x}S{sub 4} (x = {1/4}, {1/2}, 3/4) collected over the temperature range 1.8 {le} T {le} 286 K demonstrate that all phases exhibit long-range magnetic order at low temperatures. The magnetic ordering temperature is composition dependent and increases with decreasing nickel content (205, 210, and 218 K for x = 3/4, {1/2}, and {1/4}, respectively). The magnetic structure determined at 1.8 K involves a doubling of the unit cell in both the a and the c directions. Moments associated with cations in a fully occupied metal layer, directed parallel to the cation layers, show little compositional dependence, whereas those associated with cations in an ordered vacancy layer are directed toward the anion layers and have a maximum value at the composition corresponding to x = {1/2}. At temperatures between 1.8 K and the ordering temperature, materials with compositions corresponding to x = {1/4} and 3/4 show a gradual 90{degree} reorientation of the direction of the vacancy layer moments such that at temperatures just below the ordering temperature, moments lie parallel to the crystallographic b-axis.

Powell, A.V.; Colgan, D.C. [Heriot-Watt Univ., Edinburgh (United Kingdom). Dept. of Chemistry] [Heriot-Watt Univ., Edinburgh (United Kingdom). Dept. of Chemistry; Ritter, C. [Inst. Max von Laue-Paul Langevin, Grenoble (France)] [Inst. Max von Laue-Paul Langevin, Grenoble (France)

1999-03-01T23:59:59.000Z

427

Microstructures and properties of laser-glazed plasma-sprayed ZrO{sub 2}-YO{sub 1.5}/Ni-22Cr-10Al-1Y thermal barrier coatings  

SciTech Connect

Thermal barrier coatings (TBCs) consisting of two layers with various yttria contents (ZrO{sub 2}-YO{sub 1.5}/Ni-22Cr-10Al-1Y) were plasma sprayed, and parts of the various specimens were glazed by using a pulsed CO{sub 2} laser. All the specimens were then subjected to furnace thermal cycling tests at 1,100 C; the effect of laser glazing on the durability and failure mechanism of the TBCs was then evaluated. From these results, two models were developed to show the failure mechanism of as-sprayed and laser-glazed TBCs: model A, which is thermal-stress dominant, and model V, which is oxidation-stress dominant. For top coats containing cubic phase, cubic and monoclinic phases, or tetragonal and a relatively larger amount of monoclinic phases, whose degradation is thermal-stress dominant, laser glazing improved the durability of TBCs by a factor of about 2 to 6. Segmented cracks that occurred during glazing proved beneficial for accommodating thermal stress and raising the tolerance to oxidation, which resulted in a higher durability. Thermal barrier coatings with top coats containing tetragonal phase had the highest durability. Degradation of such TBCs resulted mainly from oxidation of the bond coats. For top coats with a greater amount of monoclinic phase, thermal mismatch stress occurred during cooling and detrimentally affected durability.

Tsai, H.L.; Tsai, P.C. [National Taiwan Inst. of Tech., Taipei (Taiwan, Province of China). Dept. of Mechanical Engineering and Technology

1995-12-01T23:59:59.000Z

428

Effects of Ni, Fe, Cu, and Cr substitutions for Co in La{sub 0.8}Sr{sub 0.2}CoO{sub 3} on electrocatalytic properties for oxygen evolution  

SciTech Connect

The influence of some transition metal ion substitutions in the active 0.2 mole strontium-doped lanthanum cobaltate (La{sub 0.8}Sr{sub 0.2}Co{sub 1-y}B{sub y}O{sub 3} with B = Ni, Fe, Cu, and Cr; 0.1 {<=} y {<=} 0.4) lattice was studied on the electrocatalytic properties of the oxide by cyclic voltammetry and Tafel polarization techniques. The cyclic voltammetry showed a pair of redox peaks prior to the onset of oxygen evolution, regardless of the nature of the substitution. The presence of Fe or Ni, in small quantities enhanced the electrochemically active area. The anodic polarization studies indicated two Tafel slopes: {approximately}2.3 RT/F at low and {approximately}2(2.3 RT/F) at high overpotentials. The oxygen evolution reaction on each B-site substituted perovskite followed first-order kinetics with respect to OH{sup {minus}} ion concentration. The La{sub 0.8}Sr{sub 0.2}Co{sub 0.9}Fe{sub 0.1}O{sub 3} and La{sub 0.8}Sr{sub 0.2}Co{sub 0.9}Ni{sub 0.1}O{sub 3} electrodes showed the highest electrocatalytic activity based on geometrical surface area. Copper and chromium substitutions had detrimental effects on the electrocatalytic activity.

Tiwari, S.K.; Singh, S.P.; Singh, R.N. [Banaras Hindu Univ., Varanasi (India)

1996-05-01T23:59:59.000Z

429

ac susceptibility measurements on toroid shaped samples of CdCr2x In2?2x S4 (0.85  

Science Journals Connector (OSTI)

At low temperature CdCr2x In2?2x S4 spinel solid solutions show a ferromagnetic?spin?glass transition. In the present work the ac susceptibility measurements (130 Hz

A. Saifi; V. Cagan; J. L. Dormann; M. Nogues

1985-01-01T23:59:59.000Z

430

Microsoft Word - SHE 2012 CR.docx  

Office of Legacy Management (LM)

Sherwood, Washington Sherwood, Washington Page 5-1 5.0 Sherwood, Washington, Disposal Site 5.1 Compliance Summary The Sherwood, Washington, Uranium Mill Tailings Radiation Control Act (UMTRCA) Title II disposal site was inspected on June 19 and 20, 2012. The tailings impoundment, dam, and diversion channel were in good condition. The dam inspection and associated piezometer water level measurements verified that the tailings embankment is functioning as designed. A missing perimeter sign will be replaced in 2013. Groundwater monitoring, performed as a best management practice, verified that constituent concentrations continue to be less than State of Washington water quality criteria. No cause for a follow-up inspection was identified. 5.2 Compliance Requirements

431

Microsoft Word - GUN 2005 CR.doc  

Office of Legacy Management (LM)

UMTRCA Title I Annual Report UMTRCA Title I Annual Report December 2005 Gunnison, Colorado Page 8-1 8.0 Gunnison, Colorado, Disposal Site 8.1 Compliance Summary The Gunnison Disposal Site, inspected on June 21, 2005, was in excellent condition. Six perimeter sign and the entrance sign were missing and bullets had damaged several others. All former erosion areas were stable. Areas reseeded in 2004 along the former Chance Gulch haul road require further monitoring, and therefore, the BLM right-of-way permit is still active. Revegetation of reseeded areas on Tenderfoot Mountain haul road is completed (determined to meet BLM Wildlife Mitigation Plan criteria for closure). No cause for a follow-up or contingency inspection was identified. 8.2 Compliance Requirements Requirements for the long-term surveillance and maintenance of the Gunnison, Colorado,

432

NUREG/CR-6150 EGG-2720  

Office of Scientific and Technical Information (OSTI)

150 150 EGG-2720 VOl. 2 SCDAP/RELAP5/MOD 3.1 ~ Code Manual Damage Progression Model Theory Manuscript Completed: October 1993 Date Published: June 1995 Edited by K. L . Davis Contributing Authors C. M. Allison, G. A. Bema, T . C. Cheng, E. W. Coryell, K. L. Davis, D. L. Hagrman, D. T Hagrman, J. K. Hohorst, S . Paik, A. S. Shieh, L. J. Siefken Idaho National Engineering Laboratory Lockheed Idaho Technologies Company Idaho F a l l s , ID 83415 Prepared for Division of Systems Technology OEce of Nuclear Regulatory Research U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 NRC Job Code W6095 DISCLAIMER This report was prepared as an account o f work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor

433

Microsoft Word - BLU 2012 CR.docx  

NLE Websites -- All DOE Office Websites (Extended Search)

2012 UMTRCA Title II Sites Annual Report 2012 UMTRCA Title II Sites Annual Report November 2012 Bluewater, New Mexico Page 1-1 1.0 Bluewater, New Mexico, Disposal Site 1.1 Compliance Summary The Bluewater, New Mexico, Uranium Mill Tailings Radiation Control Act (UMTRCA) Title II Disposal Site was inspected on August 21, 2012. Several shallow depressions on the main tailings disposal cell cover had standing water at the time of the inspection; the cover is being evaluated to determine if additional monitoring or cover enhancement is necessary. No maintenance needs or cause for a follow-up inspection was identified. Uranium concentrations at an alluvium point-of-compliance (POC) monitoring well continue to exceed the alternate concentration limit (ACL). Two new alluvium monitoring wells were

434

Microsoft Word - MAW 2012 CR.docx  

Office of Legacy Management (LM)

Maybell West, Colorado Maybell West, Colorado Page 4-1 4.0 Maybell West, Colorado, Disposal Site 4.1 Compliance Summary The Maybell West, Colorado, Uranium Mill Tailings Radiation Control Act (UMTRCA) Title II disposal site was inspected on August 2, 2012. The disposal cell, ancillary cell, and all associated surface water diversion and drainage structures were in good condition and functioning as designed. The entrance sign was missing and was replaced. Deep-rooted plants growing on the disposal cell and noxious weeds present on the site were treated with herbicide. No maintenance needs or cause for a follow-up inspection was identified. 4.2 Compliance Requirements Requirements for the long-term surveillance and maintenance of the Maybell West site are specified in the Long-Term Surveillance Plan for the Maybell West (UMTRCA Title II) Disposal

435

Microsoft Word - GUN 2006 CR.doc  

Office of Legacy Management (LM)

UMTRCA Title I Annual Report UMTRCA Title I Annual Report December 2006 Gunnison, Colorado Page 8-1 8.0 Gunnison, Colorado, Disposal Site 8.1 Compliance Summary The Gunnison Disposal Site, inspected on May 30 and 31, 2006, was in excellent condition. The disposal cell, its cover, and associated drainage features are performing as designed. Several missing or illegible perimeter signs and the entrance sign were replaced. All former erosion areas continue to be stable. The BLM agreed to terminate the right-of-way permit for the reseeded areas along the former reclaimed Chance Gulch haul road based on successful revegetation (determined to meet BLM Wildlife Mitigation Plan criteria for closure). No cause for a follow- up or contingency inspection was identified. 8.2 Compliance Requirements

436

Microsoft Word - SBS 2012 CR.docx  

Office of Legacy Management (LM)

Shirley Basin South, Wyoming Shirley Basin South, Wyoming Page 6-1 6.0 Shirley Basin South, Wyoming, Disposal Site 6.1 Compliance Summary The Shirley Basin South, Wyoming, Uranium Mill Tailings Radiation Control Act (UMTRCA) Title II disposal site was in excellent condition when it was inspected on June 28, 2012. No maintenance needs or cause for a follow-up inspection was identified. Groundwater monitoring indicated that the radium-228 concentration continues to exceed the alternate concentration limit (ACL) at a downgradient well between the disposal cell and the site boundary, and radium-226 continues to exceed the ACL in a downgradient well next to the site boundary. The causes of these elevated concentrations continue to be evaluated. 6.2 Compliance Requirements

437

16843_Primer_Summer09:CR  

NLE Websites -- All DOE Office Websites (Extended Search)

70 projects were 70 projects were selected for the 2010 Com- munity Sequencing Program (CSP) portfolio. They involve organisms from regions as far north as the Arctic and south to New Zealand. They include proposals to study microbial contaminants in alcohol that could impact biofuel production, microbial communities in the guts of insects from an area geography scholar Jared Diamond once described as "the nearest approach to life on another planet" and a novel bacterial isolate that could be used to remove heavy metal contaminants from fresh- water streams. "The information we generate from these projects promises to improve the clean, renew- able energy pathways being developed now as well as lend researchers more insight into the global carbon cycle, options for bioremediation, and biogeo-

438

17784_Tour_Brochure_CR:Layout 1  

NLE Websites -- All DOE Office Websites (Extended Search)

genome of an organism contains all of genome of an organism contains all of its genetic material or DNA, molecules made up of four bases known as A, C, T and G. When scientists sequence the genome, it's like taking apart a puzzle someone else completed to figure out what each section is made up of, and then re-assemble the information so that scientists can understand the big picture. The U.S. Department of Energy Joint Genome Institute has been headquartered in Walnut Creek, California since 1999, sequencing plants, microbes and communities of microbes called metagenomes that are related to the DOE mission areas of bioenergy, the carbon cycle and biogeochemistry. A fifth of the sequencing projects done worldwide is done right here in Walnut Creek. JOINT GENOME INSTITUTE sequencing the world of possibilities

439

Microsoft Word - BAR 2012 CR.docx  

Office of Legacy Management (LM)

L-Bar, New Mexico L-Bar, New Mexico Page 3-1 3.0 L-Bar, New Mexico, Disposal Site 3.1 Compliance Summary The L-Bar, New Mexico, Uranium Mill Tailings Radiation Control Act (UMTRCA) Title II disposal site was inspected on August 22, 2012. The tailings impoundment was in excellent condition. Erosion and vegetation measurements to monitor the condition of the impoundment cover indicate that no erosion is occurring, and foliar cover of the vegetation has increased since the 2011 inspection. No cause for a follow-up inspection was identified. 3.2 Compliance Requirements Requirements for the long-term surveillance and maintenance of the L-Bar site are specified in the Long-Term Surveillance Plan for the U.S. Department of Energy L-Bar, New Mexico, (UMTRCA Title II) Disposal Site, Seboyeta, New Mexico (DOE-LM/GJ709-2004,

440

Microsoft Word - CR Users Policy1110.doc  

NLE Websites -- All DOE Office Websites (Extended Search)

CAMD Cleanroom Users Policy revised 0411 Statement of Work: A cleanroom environment for processing and m etrology is required for precisi on and reproducibility in...

Note: This page contains sample records for the topic "ire cr eek" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

A VOLUME FUNCTION FOR SPHERICAL CR TETRAHEDRA  

Science Journals Connector (OSTI)

......cross-ratio associated to four distinct points in S3 is KR(p1...Here, we choose lifts for the points pi which we denote...depend on the choice of lifts. The product of the...Configurations of four points We refer to Fig. 1......

Elisha Falbel

2011-06-01T23:59:59.000Z

442

Microsoft Word - Exec Summ CR.doc  

Office of Legacy Management (LM)

Durango, Colorado Page 4-1 4.0 Durango, Colorado, Disposal Site 4.1 Compliance Summary The Durango, Colorado, Disposal Site, inspected on June 7, 2005, was in good condition. The...

443

Microsoft Word - DUR 2006 CR.doc  

Office of Legacy Management (LM)

Durango, Colorado Page 4-1 4.0 Durango, Colorado, Disposal Site 4.1 Compliance Summary The Durango, Colorado, Disposal Site, inspected on June 7, 2006, was in good condition. The...

444

NUREG/CR-5955 ORNWTM-12266  

Office of Scientific and Technical Information (OSTI)

October 1992 Date Published: April 1993 Prepared by R. L. Huddleston, R. W. Swindeman Oak Ridge National Laboratory Operated by Martin Marietta Energy Systems, Inc. DISCLAIMER...

445

NUREG/CR-5955 ORNWTM-12266  

Office of Scientific and Technical Information (OSTI)

in H grades of unstabilized stainless steels, there has been a shift in France, Germany, and Japan to the use of low-carbon, high-nitrogen steels for high- temperature...

446

NUREG/CR-6150 EGG-2720  

Office of Scientific and Technical Information (OSTI)

in Idaho,6l and by examinations of the damaged TMI-2 core.62 The experiments in Germany and Japan have revealed the existence of chemical interactions between Inconel and...

447

NUREG/CR-6299 BMI-2184  

Office of Scientific and Technical Information (OSTI)

manner in the NRC regulatory process are maln- tained at the NRC Library, Two White Flint North, 11545 Rockviile Pike, Rockville. MD 20852-2738, for use by the publlc....

448

NUREG/CR-0683 PNL-2920  

Office of Scientific and Technical Information (OSTI)

Completed: February 1979 Date Published: April 1979 Prepared for Division of Siting, Health and Safeguards Standards Office of Standards Development U. S. Nuclear Regulatory...

449

NUREG/CR-6299 BMI-2184  

Office of Scientific and Technical Information (OSTI)

NRC Job Code B5702 , DISTRIBUTION OF THIS DQCUMENT I S UNLIMITED L2r-h" Abstract ABSTRACT This topical report summarizes the work on angled crack growth and combined...

450

Electron Spectroscopy of Open?Shell Systems: Spectra of Ni(C5H5)2, Fe(C5H5)2, Mn(C5H5)2, and Cr(C5H5)2  

Science Journals Connector (OSTI)

The high resolution HeI electron spectra of Ni(C5H5)2 Fe(C5H5)2 Mn(C5H5)2 and Cr(C5H5)2 have been recorded and analyzed in terms of a molecular orbital description of the electronic structure. The ground state electronic configurations have been assigned by considering the feasible ground state configurations determining the number and type of ionic states obtained from ionization of these configurations and then comparing the predicted transitions with those observed experimentally. The ground state configuration and adiabatic first ionization potential of these molecules are: Cr(C 5 H 5 ) 2 (e 2g ) 3 (a 1g ) 1 ? 3 E 2g ? I.P. =5.50? eV ;? Mn(C 5 H 5 ) 2 (e 2g ) 4 (a 1g ) 1 ? 2 A 1g ? I.P. =6.55? eV ;? Fe(C 5 H 5 ) 2 (a 1g ) 2 (e 2g ) 4 ? 1 A 1g ? I.P. =6.72; Ni(C 5 H 5 ) 2 (a 1g ) 2 (e 2g ) 4 (e 1g ) 2 ? 3 A 2g ? I.P. =6.2? eV . Vibrational structure has been observed in the spectrum of ferrocene and is assigned to progressions in ?4 the symmetric ring?metal stretching mode.

J. W. Rabalais; L. O. Werme; T. Bergmark; L. Karlsson; M. Hussain; K. Siegbahn

1972-01-01T23:59:59.000Z

451

Supporting Online Material Materials and Methods  

E-Print Network (OSTI)

), and were used to transform PWY260 using lithium acetate. The IRE1 gene used in all shuttle vectors

Walter, Peter

452

On the mechanism of sensing unfolded protein in the endoplasmic reticulum  

E-Print Network (OSTI)

protein folding capacity according to need. Ire1 is a bifunctional enzyme, containing cytoplasmic kinase protein fold and is sufficient to control Ire1 activation by unfolded proteins. Dimerization of c the UPR. Ire1 unfolded protein response MHC protein folding secretory pathway Most secretory proteins

Mullins, Dyche

453

Semester 1 Cr Ged Semester2 Cr Ged FTY 107 -Forest Vegetation or  

E-Print Network (OSTI)

. For. Mgmt. or SFR 349 - Appl. For. Ecol. & Silv. 3 or 4 PAA 200 - Public Management 3 Hs,E PRT 352 150 - Intro. Tourism 3 PAA/BUA XXX - Public Admin. or Business course 3 Hs MAT 232 - Princ. Stat. Inf PAA 327 - Environmental Policy, Management and Regulation Credits: 3 B: Tourism BUA 201 ­ Principles

Thomas, Andrew

454

Scaffolds of magnetically active 3d metals in the valence electron controlled borides Ti{sub 9?x}M{sub 2+x}Ru{sub 18}B{sub 8} (M=CrNi; x=0.51): Structutral, electronic and magnetic properties  

SciTech Connect

Polycrystalline samples of the boride series Ti{sub 9?x}M{sub 2+x}Ru{sub 18}B{sub 8} (M=Cr, Co, Mn, Ni) including single crystals of Ti{sub 8}Co{sub 3}Ru{sub 18}B{sub 8} have been prepared by arc-melting the elements. The phases were characterized by powder X-ray diffraction (Rietveld refinement), single-crystal X-ray diffraction (for M=Co), and energy-dispersive X-ray (EDX) analysis. They are substitutional variants of the Zn{sub 11}Rh{sub 18}B{sub 8} structure type, space group P4/mbm (No. 127) and contain a scaffold structural unit (M-ladders interacting with M/Ti-chains) as well as isolated M/Ti-chains. According to DFT calculations, the RuX (X=B, Ti, Ti/M) bonding interactions are nearly constant throughout the series and responsible for the structural stability of these phases, whereas the MM and RuM interactions vary significantly with varying valence electron count. Furthermore, density of states (DOS) analyses predict the phases with M=Mn and Ni to develop a total magnetic moment but not the M=Co phase. Susceptibility measurements confirm the Co phase to be paramagnetic and the Mn Phase orders ferrimagnetically below 120 K and thus develops a magnetic moment, as predicted. - Graphical abstract: The crystal structures of the new phases (M=Cr, Mn, Co, Ni) are confirmed by Rietveld refinement of powder diffraction data and single crystal X-ray diffraction (for M=Co) to contain beside the M-ladder also M/Ti-chains. Similar to the series Ti{sub 9}M{sub 2}Ru{sub 18}B{sub 8}, the crystal structure of the new phases are mainly stabilized by the heteroatomic RuB and RuTi bonds that remain nearly constant throughout the series, whereas the M-containing bonds vary significantly with varying valence electron count. An experimental finding confirmed and even extended by COHP bonding analyses. In addition, the DOS analyses of the M-elements reveal the development of magnetic moments for the M=Mn, Ni cases but not for M=Co. Indeed, Ti{sub 8}Co{sub 3}Ru{sub 18}B{sub 8} was found experimentally to be a paramagnet and ferrimagnetic ordering below 120 K is found for M=Mn. Highlights: Synthesis of the valence electron controlled borides Ti{sub 9?x}M{sub 2+x}Ru{sub 18}B{sub 8} (M=CrNi). Prediction of magnetic properties of Ti{sub 9?x}M{sub 2+x}Ru{sub 18}B{sub 8}. Ferrimagnetic ordering found in Ti{sub 8}M{sub 3}Ru{sub 18}B{sub 8}. Chemical bonding studied by density functional theory.

Goerens, Christian [Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, D-52056 Aachen (Germany); Brgoch, Jakoah [Department of Chemistry, Iowa State University, Ames, IA 50011 (United States); Miller, Gordon J., E-mail: gmiller@iastate.edu [Department of Chemistry, Iowa State University, Ames, IA 50011 (United States); Fokwa, Boniface P.T., E-mail: boniface.fokwa@ac.rwth-aachen.de [Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, D-52056 Aachen (Germany)

2013-08-15T23:59:59.000Z

455

SCC of austenitic stainless steel, Ni-21Cr-13.5Mo alloy, and 0.3Mo-0.8Ni-Ti in 350 C synthetic, NO{sub 2}2-NO{sub 3}-OH tank waste  

SciTech Connect

A necessary step in preparation of high-level radioactive tank waste for sate disposal is removal of non radioactive organic and inorganic components from washed waste. The oxidizing and alkaline nature of most wastes allows the removal of the organic components as water vapor, carbon dioxide, and ammonia gas merely by heating the wastes to no more than 350 C. Type 3 16L stainless steel (UNS S3 1603) a 21Cr-13.5Mo-Ni alloy (UNS N06022), and 0.8Ni-0.3Mo-Ti alloy (UNS R53400) were candidate materials for reactors in which the oxidation could be performed. Slow-strain-rate tests were performed on these three materials at a strain rate of 10{sup {minus}6}sec{sup {minus}1} in a diluted waste type solution containing 4.1% NO{sub 2}, 3.7% NO{sub 3}, 1% OH, and 0.22% TIC. All three materials showed intergranular stress corrosion cracking with substantial losses in ductility and strength.

Pednekar, S.P. [Army Research Lab., Aberdeen Proving Ground, MD (United States)

1998-12-31T23:59:59.000Z

456

Equilibrium geometry and electron detachment energies of anionic Cr2O4, Cr2O5, and Cr2O6 clusters  

E-Print Network (OSTI)

University, Richmond, VA 23284, USA c Departamento de Quimica Fisica y Analitica, Facultad de Quimica

Pandey, Ravi

457

Effect of La{sub 2}O{sub 3}, CoO, Cr{sub 2}O{sub 3} and MoO{sub 3} nucleating agents on crystallization behavior and magnetic properties of ferromagnetic glass-ceramic in the system Fe{sub 2}O{sub 3}{center_dot}CaO{center_dot}ZnO{center_dot}SiO{sub 2}  

SciTech Connect

Highlights: Black-Right-Pointing-Pointer Crystallization of magnetic glass ceramic with different nucleating agents. Black-Right-Pointing-Pointer The effect of La{sub 2}O{sub 3}, CoO, Cr{sub 2}O{sub 3} and MoO{sub 3} as nucleating agents was studied. Black-Right-Pointing-Pointer XRD for as prepared samples revealed crystallization of pure magnetite. Black-Right-Pointing-Pointer Heat treatment revealed minor calcium silicate, hematite and cristobalite. Black-Right-Pointing-Pointer TEM revealed crystallization of crystallite size in the range 50-100 nm. -- Abstract: Preparation and characterization of ferromagnetic glass ceramic in the system Fe{sub 2}O{sub 3}{center_dot}CaO{center_dot}ZnO{center_dot}SiO{sub 2} with different nucleating agents was studied. The effect of La{sub 2}O{sub 3}, CoO, Cr{sub 2}O{sub 3} and MoO{sub 3} as nucleating agents was investigated. Differential thermal analysis; X-ray diffraction and transmission electron microscope were used to investigate thermal behavior, sequence of crystallization and microstructure of the samples. XRD analysis for as prepared samples revealed the crystallization of single magnetite phase. Heat treatment at 900 Degree-Sign C/2 h revealed the appearance of minor amounts of calcium silicate, hematite and cristobalite beside magnetite. TEM revealed crystallization of crystallite size in the range 50-100 nm. Lattice parameters, cell volume and crystallite size were stimulated from XRD data. Magnetic properties of quenched samples were measured under 20 kG.

Abdel-Hameed, Salwa A.M., E-mail: Salwa_NRC@hotmail.com [Glass Research Department, National Research Center, Dokki, Cairo (Egypt); Elwan, Rawhia L. [Glass Research Department, National Research Center, Dokki, Cairo (Egypt)] [Glass Research Department, National Research Center, Dokki, Cairo (Egypt)

2012-05-15T23:59:59.000Z

458

A proposed safety training program for industrial supervisors  

E-Print Network (OSTI)

that they observed and corrected orio to their last n!eeking, u, -. ing the formula develop& ir session t3!ree. Bnphas. 's is placed on those facts: . 1. lcd r& s?its . in accident preventi. on are easily obtained; 2. Tt -'s p:rt ot thr su !ervisor's job to cliui...

Loveless, Sidney Louis

2012-06-07T23:59:59.000Z

459

Timber bridge ruins, not passable.  

E-Print Network (OSTI)

1 1 W eeks Creek Highway 84 Woodruff Creek Highway84 Timber bridge ruins, not passable. Wooden deck Timber bridge ruins, not passable. Spanning boxcar bridge, passable. 0 50 100 meters Plate1A over basalt. Qf Qs Qt Qc Tb Ts House. Rip rap revetment. Concrete wall. Geogrid. Bridge or crossing

460

The Challenge of Producing Oil and Gas in Deep Water  

Science Journals Connector (OSTI)

...institutions (Joides). The oil industry has drilled controlled...major unexplored frontier for oil and gas. The paper emphasizes...engineering geology natural gas offshore petroleum production 1977 06...1981 The challenge of producing oil and gas in deep water van Eek...

1978-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ire cr eek" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Microsoft Word - SNOPUD_Youngs_Cr_Hydro_CX_+_Checklist.doc  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

18, 2010 18, 2010 REPLY TO ATTN OF: KEC-4 SUBJECT: Environmental Clearance Memorandum James Hall Customer Service Engineer - TPC-TPP-4 Proposed Action: Interconnection of Snohomish County Public Utility District No.1 (SNOPUD) Young's Creek Hydro Small Generation Budget Information: WO# 00231295, Task 01 Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B4.6 Additions or modifications to electric power transmission facilities that would not affect the environment beyond the previously developed facility area including, but not limited to, switchyard rock grounding upgrades, secondary containment projects, paving projects, seismic upgrading, tower modifications, changing insulators, and replacement of poles, circuit breakers, conductors,

462

Microsoft Word - SPK 2007 CR-final.doc  

Office of Legacy Management (LM)

Spook, Wyoming Spook, Wyoming Page 18-1 18.0 Spook, Wyoming, Disposal Site 18.1 Compliance Summary The Spook, Wyoming, Disposal Site, inspected on June 12, 2007, was in excellent condition. Minor erosion occurring at several locations displayed little change from the previous year. The old water supply well on the site had a new power supply and buried pipeline to an offsite location indicating use of the well by a local rancher under the perpetual access agreement. No cause for a follow-up or contingency inspection was identified. 18.2 Compliance Requirements Requirements for the long-term surveillance and maintenance of the Spook, Wyoming, Uranium Mill Tailings Radiation Control Act (UMTRCA) Title I Disposal Site are specified in the Long- Term Surveillance Plan [LTSP] for the Spook, Wyoming, Disposal Site (DOE/AL/350215.000,

463

Microsoft PowerPoint - CR_draft.pptx  

NLE Websites -- All DOE Office Websites (Extended Search)

g g q g and Research 2011 Yearly Review Meeting y g Project DE-FE0001790 j Title: Monitoring and Numerical Modeling of Shallow CO2 Injection, Greene County, j , y, Missouri Missouri State University Missouri State University Presenter: Dr. Charles Rovey Department of Geography, Geology, and Planning February 23, 2011 Project Participants Project Participants * Charles Rovey (PI) Charles Rovey (PI) * Doug Gouzie (PI) i h i i i ( ) * Rich Biagioni (PI) - David Butcher (RA) - Nathan Diaz (RA) - Nelson Rono (RA) Introduction Introduction * Background: Background: Follow up on a previous sequestration project: City Utilities (CU) Shallow Sequestration Program Greene County Missouri (CU) Shallow Sequestration Program, Greene County, Missouri.

464

14128_JGI_CR_07:2007 JGI Progress Report  

NLE Websites -- All DOE Office Websites (Extended Search)

JOINT JOINT GENOME INSTITUTE PROGRESS REPORT 2007 U.S. DEPARTMENT OF ENERGY On the cover: The eucalyptus tree was selected in 2007 for se- quencing by the JGI. The microbial community in the termite hindgut of Nasutitermes corniger was the subject of a study published in the November 22, 2007 edition of the journal, Nature. JGI Mission The U.S. Department of Energy Joint Genome Institute, supported by the DOE Office of Science, unites the expertise of five national laboratories-Lawrence Berkeley, Lawrence Livermore, Los Alamos, Oak Ridge, and Pacific Northwest - along with the Stanford Human Genome Center to advance genomics in support of the DOE mis- sions related to clean energy generation and environmental char- acterization and cleanup. JGI's Walnut Creek, CA, Production

465

UMore Ph IA CR Report 7-8-10.pdf  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

PHASE IA ARCHAEOLOGICAL AND PHASE IA ARCHAEOLOGICAL AND ARCHITECTURAL HISTORY SURVEY FOR THE UMORE PARK RESEARCH WIND TURBINE PROJECT, DAKOTA COUNTY, MINNESOTA SHPO File No. Pending Client No. Pending The 106 Group Project No. 10-18 Submitted to: Barr Engineering Company 4700 West 77th Street Minneapolis, MN 55435-4803 Submitted by: The 106 Group Ltd. The Dacotah Building 370 Selby Avenue St. Paul, MN 55102 Principal Investigators: AnneKetz, M.A., RPA Greg Mathis, M.C.R.P. Report Authors: Mark Doperalski, B.S. Miranda Van Vleet, M.H.P July 2010 UMore Park Wind Turbine Project Phase IA Archaeological and Architectural History Survey Page i MANAGEMENT SUMMARY During May of 2010, The 106 Group Ltd. (106 Group) conducted a Phase IA archaeological and architectural history survey for the University of Minnesota Outreach, Research, and

466

cr_14229_JGI_Primer_Fall07 :Layout 1  

NLE Websites -- All DOE Office Websites (Extended Search)

JGI Community Sequencing JGI Community Sequencing Program (CSP) is contributing to an ambi- tious international effort to decode the genome of Eucalyptus, one of the world's most valuable fiber and paper-producing trees-with the goal to maximize its poten- tial in the burgeoning bioenergy market and for capturing excess atmospheric carbon. The scientific effort to characterize the Eucalyptus genome, uniting some two dozen institutions worldwide, is led by Alexander Myburg of the University of Pretoria (South Africa), with co-leads Dario Grattapaglia, of EMBRAPA and Catholic University of Brasília (Brazil), and Jerry Tuskan of Oak Ridge National Laboratory-JGI's Laboratory Science Program lead. The 600-million-nucleotide tree genome was selected as one of JGI's CSP FY2008 major allocations.

467

cv15866_JGI_PR_CR:JGI Progress Report  

NLE Websites -- All DOE Office Websites (Extended Search)

E E J G I - p o w e r i n g a s u s t a i n a b l e f u t u r e w i t h t h e s c i e n c e w e n e e d f o r b i o f u e l s , e n v i r o n m e n t a l c l e a n u p , a n d c a r b o n c a p t u r e . 2 0 0 8 P r o g r e s s R e p o r t J o i n t G e n o m e I n s t i t u t e U . S . D E P A R T M E N T O F E N E R G Y T h e c o v e r d e p i c t s v a r i o u s D O E m i s s i o n - r e l e v a n t g e n o m e s e q u e n c i n g t a r g e t s o f t h e D O E J o i n t G e n o m e I n s t i t u t e . D O E J G I M i s s i o n T h e U . S . D e p a r t m e n t o f E n e r g y J o i n t G e n o m e I n s t i - t u t e , s u p p o r t e d b y t h e D O E O f f i c e o f S c i e n c e , u n i t e s t h e e x p e r t i s e o f f i v e n a t i o n a l l a b o r a t o r i e s - L a w r e n c e B e r k e l e y , L a w r e n c e L i v e r m o r e , L o s A l a m o s , O a k R i d g e , a n d P a c i f i c N o r t h w e s t - a l o n g w i t h t h e H u d s o n A l p h a I n s t i t u t e f o r B i o t e c h n o l o g y t o a d v a n c e g e n o m i c s i n s u p p o r t o f t h e D O E m i s s i o n s r e l a t e d t o b i o e n e r g y , c a r b o n c y c l i n g , a n d b i o g e o c h e m i s t r y . J G I , l o c a t e d i n W a l n u t C r e e k , C a l i f o r n i a , p r o v i d e s i n t e g r a t e d

468

Microsoft Word - EDG 2008 CR-final.doc  

Office of Legacy Management (LM)

II Sites Annual Report II Sites Annual Report November 2008 Edgemont, South Dakota Page 2-1 2.0 Edgemont, South Dakota, Disposal Site 2.1 Compliance Summary The Edgemont, South Dakota, Uranium Mill Tailings Radiation Control Act (UMTRCA) Title II Disposal Site was inspected on June 10, 2008, and was in good condition. A new entrance signpost was installed during the inspection to replace the broken post. Cattle continue to graze on site under a license agreement. The presence of cattle may be affecting range conditions on and off the cell, and may be causing minor erosional features in the southeast portion of the site. Neither the range condition nor the erosion is currently affecting the integrity or stability of the disposal cell. However, the grazing plan will be modified to prohibit grazing during critical

469

Microsoft Word - GUN 2007 CR-final.doc  

Office of Legacy Management (LM)

Gunnison, Colorado Gunnison, Colorado Page 8-1 8.0 Gunnison, Colorado, Disposal Site 8.1 Compliance Summary The Gunnison, Colorado, Disposal Site, inspected on May 21, 2007, is in excellent condition. One perimeter sign was missing and will be replaced in 2008. Six riprap test areas on the cell apron and diversion ditches were visually inspected and photographed; no apparent rock degradation was noted when compared to previous photos. Significant rainfall caused minor rill erosion at two new locations on site; all areas of erosion appear to be stable. No cause for a follow-up or contingency inspection was identified. 8.2 Compliance Requirements Requirements for the long-term surveillance and maintenance of the Gunnison, Colorado, Uranium Mill Tailings Radiation Control Act (UMTRCA) Title I Disposal Site are specified in

470

Microsoft Word - CR-AH Request Form.doc  

NLE Websites -- All DOE Office Websites (Extended Search)

Cleanroom After-Hours Request Form Personal Contact Information Date Name Email Phone Project Number...

471

Extragalactic circuits, transmission lines, and CR particle acceleration  

E-Print Network (OSTI)

A non-negligible fraction of a Supermassive Black Hole's (SMBH) rest mass energy gets transported into extragalactic space by a remarkable process in jets which are incompletely understood. What are the physical processes which transport this energy? It is likely that the energy flows electromagnetically, rather than via a particle beam flux. The deduced electromagnetic fields may produce particles of energy as high as $\\sim 10^{20}$ eV. The energetics of SMBH accretion disk models and the electromagnetic energy transfer imply that a SMBH should generate a $10^{18} - 10^{19}$ Amp\\`eres current close to the black hole and its accretion disk. We describe the so far best observation-based estimate of the magnitude of the current flow along the axis of the jet extending from the nucleus of the active galaxy in 3C303. The current is measured to be $I \\sim 10^{18}$ Amp\\`eres at $\\sim 40$ kpc away from the AGN. This indicates that organized current flow remains intact over multi-kpc distances. The electric current $...

Kronberg, Philipp P

2014-01-01T23:59:59.000Z

472

NASA/CR2004208938 Lunar Receiving Laboratory Project History  

E-Print Network (OSTI)

NASA/CR­2004­208938 Lunar Receiving Laboratory Project History Susan Mangus Muskingum College New Concord, Ohio William Larsen Johnson Space Center Houston, Texas June 2004 #12;THE NASA STI PROGRAM OFFICE . . . IN PROFILE Since its founding, NASA has been dedicated to the advancement of aeronautics and space science

Rathbun, Julie A.

473

October 2010 NASA/CR2010-216861  

E-Print Network (OSTI)

October 2010 NASA/CR­2010-216861 Optimizing Air Transportation Service to Metroplex Airports Part Mason University, Fairfax, Virginia #12;NASA STI Program . . . in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA scientific and technical

474

NASA/CR2003212153 A Stochastic Collocation Algorithm  

E-Print Network (OSTI)

NASA/CR­2003­212153 A Stochastic Collocation Algorithm for Uncertainty Analysis Lionel Mathelin and M. Yousuff Hussaini Florida State University, Tallahassee, Florida February 2003 #12;The NASA STI Program Office . . . in Profile Since its founding, NASA has been dedicated to the advancement

Mathelin, Lionel

475

October 2010 NASA/CR2010-216860  

E-Print Network (OSTI)

October 2010 NASA/CR­2010-216860 Optimizing Air Transportation Service to Metroplex Airports Part 1;NASA STI Program . . . in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA scientific and technical information (STI) program plays a key part

476

Fall 2008 Electives COURSE # CR LV COURSE TITLE SCHEDULE INSTRUCTOR  

E-Print Network (OSTI)

74601 3 G RAWLS' POLITICAL PHIL TH 4 30-6 15 RASMUSSEN PL76101 3 G HEGEL/PHENOMENOL/SPIRIT M 6 30-8 15

Huang, Jianyu

477

Audit Report: CR-MA-95-02  

Energy.gov (U.S. Department of Energy (DOE))

Management Advisory Report on Universities Research Association's Documentation and Technical Closeout Activities

478

Council Resolution -07 (CR-07): Dependent Health Care Insurance Reform  

E-Print Network (OSTI)

graduate student salary; WHEREAS, SHIP administrators have projected the effect on premiums for Dependents Program (SHIP), however, the premiums are currently twice as expensive for Dependents than for enrolled and quality coverage for dependents of graduate students";1 WHEREAS, SHIP Dependent premiums are currently 2

Gleeson, Joseph G.

479

SF 6432-CR Standard Terms and Conditions for Cost Reimbursement...  

NLE Websites -- All DOE Office Websites (Extended Search)

Laboratories under Contract No. DE-AC04- 76DP00789, as amended. (b) SCR - SANDIA CONTRACTING REPRESENTATIVE The only person authorized to execute andor administer this...

480

SF6432-CR (02-01-13) Cost Reimbursement  

NLE Websites -- All DOE Office Websites (Extended Search)

AS BEING CHANGED, SUPPLEMENTED, OR AMENDED IN WRITING ISSUED BY THE SANDIA CONTRACTING REPRESENTATIVE. (CTRL+CLICK ON A LINK BELOW TO ADVANCE DIRECTLY TO THAT SECTION)...

Note: This page contains sample records for the topic "ire cr eek" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

CR Mission ORENOQUE Venezuela, 05 20 octobre 1999  

E-Print Network (OSTI)

cadre de la coopération déjà ancienne entre la « Fundation La Salle de Ciencas Naturales » et plus

Guillard, Jean

482

Antragsbeispiele API bzw. RfC (CR/C)/ITU  

Science Journals Connector (OSTI)

Nachfolgend findet sich ein Beispiel einer Advance Publication fr ein Satellitensystem mit niedrigfliegendem Satelliten (Rund-um-die-Welt-in-100-min) sprich eine sogenannte full API, die fr NGSO-Satellite...

Ren Wrfel; Hans Dodel

2012-01-01T23:59:59.000Z

483

HOWARTH, RW, D. SWANEY, R. MARINO, T. BUTLER. AND CR ...  

Science Journals Connector (OSTI)

Inc. Comment. 639. Turbulence does not prevent nitrogen fixation by plankton in ..... level at us: it does not include turbulence at the smallest .... Fundamentals of.

484

D-2 FALL TERM TERM CR. COURSE DEPARTMENT  

E-Print Network (OSTI)

Basic Dental Radiology Oral Maxillofacial RadiologyDr. W. Shintaku 2 DSOM 203 Patient Evaluation* Oral to Pediatric Dentistry* Pediatric Dentistry Dr. H. K. Sharp 3 PERI 203 Clinical Periodontology Periodontology & Maxillofacial Surg Oral & Maxillofacial SurgeryDr. L.W. Weeda 1 PDCH 202 Pediatric Dentistry Lab Pediatric

Cui, Yan

485

D-3 FALL TERM TERM CR. COURSE DEPARTMENT  

E-Print Network (OSTI)

Community Oral Health Dr. P.N. Gregory 2 PDCH 302 Pediatric Dental Clinic* Pediatric Dentistry Dr. H.K. Sharp 1 PDCH 304 Patient Centered Dentistry Pediatric Dentistry Ms. M. Seeberg 2 PERI 301 Basic *Continues through Spring Term D-3 SPRING TERM 1 DSOM 305 Advanced Dental Radiology Oral Maxillofacial

Cui, Yan

486

D-3 FALL TERM TERM CR COURSE DEPARTMENT  

E-Print Network (OSTI)

Community Oral Health Dr. P.N. Gregory 2 PDCH 302 Pediatric Dental Clinic* Pediatric Dentistry Dr. H.K. Sharp 1 PDCH 304 Patient Centered Dentistry Pediatric Dentistry Ms. M. Seeberg 2 PERI 301 Basic *Continues through Spring Term D-3 SPRING TERM 1 DSOM 305 Advanced Dental Radiology Oral Maxillofacial

Cui, Yan

487

CR Systems Engineering and Design March 2003 COMMUNICATIONS RESOURCES  

E-Print Network (OSTI)

Environmental Health and Safety (EH&S) Confined Space Entry Program Employee Guide to provide specific guidance Hazards. (Dangerous Air Contamination) An atmosphere presenting a threat of causing death, injury, acute or incapacitating substances. Dangerous Air Contamination is further defined as: 1. Dangerous air contamination due

California at Davis, University of

488

Experimental Stark widths and shifts of Cr II spectral lines  

Science Journals Connector (OSTI)

......Stark widths and shifts of Crii spectral lines J. A. Aguilera 1 C. Aragon 1 J. Manrique...Spain Stark widths and shifts of Crii lines with wavelengths in the range 2000-3500-a...to control the self-absorption of the lines. The Stark widths and shifts are compared......

J. A. Aguilera; C. Aragn; J. Manrique

2014-01-01T23:59:59.000Z

489

Microsoft Word - DUR 2007 CR-final.doc  

Office of Legacy Management (LM)

increased uranium concentration reported downgradient needs to be evaluated. In 2007, a solar-powered water management system was installed to distribute retention pond water to...

490

E-Print Network 3.0 - aq tbbr3cr hobr3cr Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

de) (qb, qc, qd, qe, aqb, ... Source: Pujo-Menjouet, Laurent - Institut Camille Jordan, Universit Claude Bernard Lyon-I Collection: Mathematics ; Biology and Medicine 2...

491

BACHELOR OF SCIENCE IN GEOLOGY CATALOG 131 Fall (Th-Pr) Cr Spring (Th-Pr) Cr  

E-Print Network (OSTI)

106 Historical Geology (3-3) 4 MATH 151 Engineering Math. I (3-2) 4 MATH 152 Engineering Math. II (3-0) 3 GEOL 309 Introduction to Geologic Field Methods (1-6) 3 MATH 251 Engineering Math. III (3-0) 3-3) 4 GEOL 305 Paleobiology (2-3) 3 GEOL 312 Structural Geology and Tectonics (3-3) 4 U.S. history

492

Characterization of the CR-39 neutron track etch dosimeter and evaluation of a combination CR-39/thermoluminescent dosimeter badge  

E-Print Network (OSTI)

that the ratio of TED response in tracks/cm2 to TLD response in thermoluminescence is very descriptive for determining effective energies of the neutron spectra encountered by these employees. This TED to TLD ratio was investigated further by using a simulated... this paper. TABLE OF CONTENTS Page ABSTRACT . ACKNOWLEDGEMENT TABLE OF CONTENTS VI LIST OF TABLES LIST OF FIGURES INTRODUCTION V III IX Radiation Dosimetry . Review of Current Neutron Dosimeters Solid State Nuclear Track Detectors...

Hoover, Paul Steven

2012-06-07T23:59:59.000Z

493

Effect of Composition on the Solidification Behavior of Several Ni-Cr-Mo and Fe-Ni-Cr-Mo Alloys  

E-Print Network (OSTI)

simulate the solidifi- cation behavior of dissimilar welds made between AL-6XN and Ni-base filler metals.[3 differential thermal analysis (DTA) samples and welded specimens. This explains the in- variance of the amount of eutectic constituent observed in the microstructure in the welded and DTA conditions. Multicomponent

DuPont, John N.