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1

HNF-37489-FP Revision  

Office of Scientific and Technical Information (OSTI)

HNF-37489-FP HNF-37489-FP Revision 0 Project Hanford Management Contractor foc the US. Deparbnsnt of Energy under Contract DE-ACO6-96RL13200 FLUOR, P.O. Box 1000 Richland, Washington Implementation of the Seismic Design Criteria for DOE-STD-I 189-2008, Appendix A HNF-37489-FP Revision 0 Implementation of the Seismic Design Criteria for DOE-STD-1189- 2008, Appendix A S. K. Omberg Fluor Government Group Date Published April 2008 To Be Presented at The Nuclear Renaissanm. Safety Analysls for the New Nuclear Age Energy Facility Contractow Group May 3 - 8,2008 Prepared for the U.S. Department of Energy Assistant Secretary for Environmental Management Pmject Hanford Management CcntractOr for the US. Department of Energy under Contract DE-AC0696RL132W FLUOR, P.O. Box I000

2

Jacobi shape transition in fp shell nuclei  

Science Journals Connector (OSTI)

Jacobi shape transition from noncollective oblate to super or hyperdeformed collective prolate or triaxial shape taking place in rotating nuclei as in the case of gravitating rotating stars is studied in fp shell nuclei 44Ti, 48Cr, 52Fe, and 56Ni. The cranked Nilsson-Strutinsky method is used to detect such transition. The method of tuning the angular velocity to get fixed spin is utilized in these calculations. Pairing is not taken into account since Jacobi transition occurs only at very high spin where pairing correlations would have already vanished. Our results show that all the four nuclei considered in this work are good candidates for detecting the Jacobi shape transition.

G. Shanmugam; V. Ramasubramanian; S. N. Chintalapudi

2001-05-10T23:59:59.000Z

3

Ts&Cs FP  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

0-09) Title: Standard Terms and Conditions for 0-09) Title: Standard Terms and Conditions for Firm-Fixed Price Contracts Owner: Procurement Policy & Quality Dept Initial Release Date: 10/22/09 Page 1 of 16 PPQD-TMPLT-008R00 Template Release Date: 06/12/09 Printed copies of this document are uncontrolled. Before using a printed copy to perform work, verify the version against the electronic document to ensure you are using the correct version. SANDIA CORPORATION SF 6432-FP (10-09) Section II STANDARD TERMS AND CONDITIONS FOR FIRM-FIXED PRICE CONTRACTS THE FOLLOWING CLAUSES APPLY TO THIS CONTRACT AS INDICATED UNLESS SPECIFICALLY DELETED, OR EXCEPT TO THE EXTENT THEY ARE SPECIFICALLY SUPPLEMENTED OR AMENDED IN WRITING IN THE COVER PAGE OR SECTION I. FP01 - ACCEPTANCE OF TERMS AND CONDITIONS (Ts&Cs) Contractor, by

4

Ts&Cs FP  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

6/14/11 6/14/11 Page 1 of 17 Printed copies of this document are uncontrolled. Retrieve latest version electronically. SANDIA CORPORATION SF 6432-FP (06/14/11) Section II STANDARD TERMS AND CONDITIONS FOR FIRM-FIXED PRICE CONTRACTS THE FOLLOWING CLAUSES APPLY TO THIS CONTRACT AS INDICATED UNLESS SPECIFICALLY DELETED, OR EXCEPT TO THE EXTENT THEY ARE SPECIFICALLY SUPPLEMENTED OR AMENDED IN WRITING IN THE COVER PAGE OR SECTION I. FP01 - ACCEPTANCE OF TERMS AND CONDITIONS (Ts&Cs) Contractor, by signing this contract and/or delivering items or services ordered under this contract, agrees to comply with all the Ts&Cs and all specifications and other documents that this contract incorporated by reference or attachment. Sandia hereby objects to any Ts&Cs contained in any acknowledgment of this contract

5

WHC-SA-1619-FP  

Office of Scientific and Technical Information (OSTI)

WHC-SA-1619-FP WHC-SA-1619-FP Stress Analysis and Evaluation of a Rectangular Pressure Vessel Prepared for the U.S. Department of Energy '"^pf^. Office of Environmental {Restoration and ^''l^prf ^ Waste Management O^Q "'-^ (/^ Westinghouse HanfOrd Company Plchland, Washington Hanford Operations and Engineenng Contractor for the U.S. Department of Energy under Contract DE-AC06-87RL10930 Copyright LICSnso By acceptance of this article, the publisher and/or recipient acknowledges the U.S Government's nght to retain a nonexclusive, royalty-free license in and to any copyright covering this paper. Approved for Public Release OfSTRtBUTTON OF THIS DOCUMENT IS UNLIMITED LEGAL DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government Neither the

6

TTUS FP&C Design & Building Standards Division 15 Mechanical  

E-Print Network [OSTI]

TTUS FP&C Design & Building Standards Division 15 ­ Mechanical Division 15 ­ Mechanical the performance of the building systems. If the project team would like an exception to the standards's Representative. Page 1 of 39 #12;TTUS FP&C Design & Building Standards Division 15 ­ Mechanical

Gelfond, Michael

7

1. INTRODUCTION High-energy fusion-product (fp) transport (e.g., alpha particle  

E-Print Network [OSTI]

1 1. INTRODUCTION High-energy fusion-product (fp) transport (e.g., alpha particle transport in D-T plasmas) is a central issue in fusion reactor de- velopment. Important effects dependent on fp transport-7 are concerned with fp wall bombardment and focus on two types of charged, high-energy fp losses from

Hively, Lee M.

8

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

9

TTUS FP&C Design & Building Standards Division 10 Specialties  

E-Print Network [OSTI]

TTUS FP&C Design & Building Standards Division 10 ­ Specialties Division 10 ­ Specialties and set quality standards for installation. 1. Build mockup of typical wall area in classroom and weathertight, wet work in spaces is complete and dry, work above ceilings is complete, and temporary HVAC

Gelfond, Michael

10

SPEC 95fp tomcatv OSCAR A Local Memory Management Scheme  

E-Print Network [OSTI]

grain task parallel processing. In the evaluation using SPEC 95fp tomcatv, the proposed scheme using 8 Conditional Branch 1 2 3 4 5 6 7 8 9 10 11 12 13 14 (b) Macro Task Graph (MTG)(a) Macro Flow Graph (MFG) 2),14) 12),14) (MTG)12),14) 2 4.1 RB RB PG 4.2 3.3 (PG) PG 2 #12;PG 4.4 4 OSCAR (Target Loop Group: TLG

Kasahara, Hironori

11

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

12

Call title: FP7-AERONAUTICS and AIR TRANSPORT (AAT)-2010-RTD-RUSSIA Call identifier: FP7-AAT-2010-RTD-RUSSIA  

E-Print Network [OSTI]

1 Call title: FP7-AERONAUTICS and AIR TRANSPORT (AAT)-2010-RTD-RUSSIA · Call identifier: FP7-AAT-2010-RTD-RUSSIA · Date of publication: 30 July 2009 · Deadline1 : 14 January 2010 at 17.00.00 (Brussels strategic international cooperation with Russia in the field of advanced aerodynamics and innovative design

Milano-Bicocca, Università

13

Proton capture resonance spins by multidimensional scaling: fp nuclei  

Science Journals Connector (OSTI)

The method of nonmetric multidimensional scaling has been used to attribute spins to a large number of proton capture resonances in five fp-shell nuclei, V47, Mn51, Mn53, Co55, and Cu61, using as input information only the gamma decay branching ratios. The calibration of the method relies on the measured spins of a number of the resonances. In more than half the cases, a unique spin is found. The results of the analysis allow a reappraisal of analog states in the five nuclei.

J. A. Cameron

1993-06-01T23:59:59.000Z

14

Isospin-mixing corrections for fp-shell Fermi transitions  

Science Journals Connector (OSTI)

Isospin-mixing corrections for superallowed Fermi transitions in fp-shell nuclei are computed within the framework of the shell model. The study includes three nuclei that are part of the set of nine accurately measured transitions as well as five cases that are expected to be measured in the future at radioactive-beam facilities. We also include some new calculations for C10. With the isospin-mixing corrections applied to the nine accurately measured ft values, the conserved-vector-current hypothesis and the unitarity condition of the Cabbibo-Kobayashi-Maskawa matrix are tested.

W. E. Ormand and B. A. Brown

1995-11-01T23:59:59.000Z

15

SF6432-FP (02-01-12) Firm Fixed Price  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

2/01/12 2/01/12 Page 1 of 21 Printed copies of this document are uncontrolled. Retrieve latest version electronically. SANDIA CORPORATION SF 6432-FP (02/01/12) Section II STANDARD TERMS AND CONDITIONS FOR FIRM-FIXED PRICE CONTRACTS THE FOLLOWING CLAUSES APPLY TO THIS CONTRACT AS INDICATED UNLESS SPECIFICALLY DELETED, OR EXCEPT TO THE EXTENT THEY ARE SPECIFICALLY SUPPLEMENTED OR AMENDED IN WRITING IN THE COVER PAGE OR SECTION I. (CTRL+CLICK ON A LINK BELOW TO ADVANCE DIRECTLY TO THAT SECTION) ACCEPTANCE OF TERMS AND CONDITIONS (Ts&Cs) APPLICABLE LAW ASSIGNMENT BANKRUPTCY DEFINITIONS DISPUTES EXCESS FREIGHT CHARGES EXCUSABLE DELAYS EXPORT CONTROL EXTRAS AND VARIATION IN QUANTITY GOVERNMENT PROPERTY MATERIAL AND EQUIPMENT MANUFACTURING AND TESTING STANDARDS

16

TTUS FP&C Design & Building Standards Division 1 General Requirements  

E-Print Network [OSTI]

TTUS FP&C Design & Building Standards Division 1 ­ General Requirements Division 1) Facilities Planning & Construction (FP&C) office has created the TTUS Design and Building Standards of the construction process to meet or exceed the TTUS building standards. Operating Policies and procedures (OPs

Gelfond, Michael

17

Alpha particle cluster states in fp-shell nuclei  

Science Journals Connector (OSTI)

Alpha particle cluster structure is known experimentally to persist throughout the mass range 16?A?20, and has been very successfully described in this region in terms of the Buck-Dover-Vary local potential cluster model. It is argued that an analogous cluster structure should be present in nuclei at the beginning of the fp shell, and the available experimental data are examined to determine likely alpha particle cluster state candidates in the mass range 40?A?44. Calculations of the cluster state spectra and mean square cluster-core separation distances (which may be readily used to evaluate E2 electromagnetic transition rates) for Ca40, Ca42, Sc42, Sc43, Ti43, and Ti44 using the above-mentioned model are presented, and compared with experimental measurements where possible. The agreement between theory and experiment is generally good (although inferior to that obtained in the sd shell), and points to the desirability of an extension and improvement of the measurements of the properties of the excited states in these nuclei.

A. C. Merchant

1987-08-01T23:59:59.000Z

18

Euratom Programme for Nuclear Research and Training Guide for Applicants: FP7-Fission-2007 GUIDE FOR APPLICANTS  

E-Print Network [OSTI]

Euratom Programme for Nuclear Research and Training Guide for Applicants: FP7-Fission-2007 i GUIDE FOR APPLICANTS Euratom Programme for Nuclear Research and Training Activities Call Identifier: FP7-Fission-2007 Programme for Nuclear Research and Training Guide for Applicants: FP7-Fission-2007 iii Contents TU1UT

De Cindio, Fiorella

19

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

20

Making European Fisheries Ecosystem Plans Operational EC FP7 project # 212881  

E-Print Network [OSTI]

.2.1.4 Deep Water................................................................................................. 143 1.2.3.4 Deep WaterMEFEPO Making European Fisheries Ecosystem Plans Operational EC FP7 project # 212881 Work Package 1

Hansen, René Rydhof

Note: This page contains sample records for the topic "fp a-e cr" 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

The Ro (S)-graded equivariant homotopy of THH(Fp)  

E-Print Network [OSTI]

The main result of this thesis is the computation of ... for ... These RO(S)-graded TR-groups are the equivariant homotopy groups naturally associated to the S-spectrum THH(Fp), the topological Hochschild S-spectrum. ...

Gerhardt, Teena Meredith

2007-01-01T23:59:59.000Z

22

Department of Energy Federal Acquisition Regulation Clause Usage Guide  

Broader source: Energy.gov (indexed) [DOE]

Type of Contract: FP SUP Fixed-Price Supply CR SUP Cost-Reimbursement Supply FP SVC Fixed-Price Service CR SVC Cost Reimbursement Service FP CON Fixed-Price Construction CR CON Cost Reimbursement Construction T&M LH Time & Material, Labor Hours FP A-E Fixed Price Architect-Engineer CR A-E Cost Reimbursement Architect-Engineer Comm. Items Commercial Items M&O Management & Operating Other Fac. Mgmt. Other Facility Management SAP Simplified Acquisition Procedures Clause Usage R Required A Required When Applicable NA Not Applicable Provision or Clause (Click on clause number to see its text and prescription FP Sup. CR Sup. FP Serv. Cost Serv. FP Cons. Cost Cons. T&M. L.H. FP A- E Cost A-E Com. Items. M&O Other

23

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

24

FP-Rank: An Effective Ranking Approach Based on Frequent Pattern Analysis  

E-Print Network [OSTI]

FP-Rank: An Effective Ranking Approach Based on Frequent Pattern Analysis Yuanfeng Song, Kenneth. Ranking documents in terms of their relevance to a given query is fundamental to many real on developing efficient ranking models. While ranking mod- els are usually trained based on given training

Ng, Wilfred Siu Hung

25

FP7 calls for proposals published 22nd December 2006 Cooperation themes  

E-Print Network [OSTI]

;Details: Hydrogen and fuel cells, renewable electricity generation, renewable fuel production, CO2 capture efficiency, ensuring customer satisfaction and safety level 1,2& structuring, improving cost efficiency level Details: Improving cost efficiency level 1 Link to call: http://cordis.europa.eu/fp7/dc/index.cfm

Meju, Max

26

P\\procedure\\FP#36 TITLE: GREEN BUILDING POLICY PROMOTING ENVIRONMENTAL QUALITY AND  

E-Print Network [OSTI]

P\\procedure\\FP#36 TITLE: GREEN BUILDING POLICY PROMOTING ENVIRONMENTAL QUALITY AND RESOURCE the U.S. Green Building Council's LEED Silver standard or equivalent. This policy will be limited% of building replacement value". RESPONSIBILITY: ACTION FACILITIES PLANNING DIRECTOR Ensure that the green

Fernandez, Eduardo

27

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.

28

NUREG/CR-6853  

Broader source: Energy.gov (indexed) [DOE]

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

29

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

SciTech Connect (OSTI)

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

30

SF 6432-FP Standard Terms and Conditions for Firm Fixed-price Contracts  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

FP (04-95) FP (04-95) Sections II & III SECTION II STANDARD TERMS AND CONDITIONS FOR FIRM FIXED PRICE CONTRACTS INDEX OF CLAUSES THE FOLLOWING CLAUSES APPLY TO THIS CONTRACT AS INDICATED UNLESS SPECIFICALLY DELETED, OR EXCEPT TO THE EXTENT THEY ARE SPECIFICALLY SUPPLEMENTED OR AMENDED IN WRITING IN THE SIGNATURE PAGE OR SECTION I. No. Title Page "A" Clauses apply to Requests for Quotation and Contracts at any value A10 Definitions 2 A11 Unclassified Contract 2 A12 Assignment 2 *A13 Releases Void 2 *A14 Notice of Labor Disputes 2 A17 Delegated Representatives 2 *A18 Defense Priority and Allocation System 2 A19 Terms and Conditions 3 *A20 Permits 3 *A23 Applicable Law 3 A25 Commerce in Explosives, Firearms and 3 Ammunition - Exemption *A27 Order of Precedence

31

Training: Probing Solar Photoconversion Using Flash-Photolysis Time-Resolved Microwave Conductivity (FP-TRMC)  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Probing Probing solar photoconversion using flash---photolysis 6 me--- resolved microwave conduc6vity (FP---TRMC) Chemical & Nanosciences Group Chemical & Materials Science Center NREL is a na*onal laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. TRMC users ๏ PI: Garry Rumbles ๏ Current users - Rebecca Callahan (liquid crystal donor materials) - Ryan Crisp (semiconductor NC

32

The Application of the FP-54 Pliotron to Atomic Disintegration-Studies  

Science Journals Connector (OSTI)

The possibility of utilizing the high inherent sensitivity of the FP-54 Pliotron in nuclear disintegration-studies, particularly in connection with the problem presented by the discrepancies in present experimental results on resonance-disintegration of aluminum, has been investigated. The usable sensitivity of the tube is found to be limited only by a residual fluctuation of about 310-5 root-mean square volt. A theoretical consideration shows that this fluctuation is of the order of magnitude to be expected from shot-effects and thermal effects in the grid-circuit.Disintegration-Experiments on Aluminum.Preliminary observations on the disintegration of aluminum when using a thick target gave the following results. The yield was about 20 protons, of ranges between 30 and 50 cm per 108 ?-particles, in good agreement with the results of Pose. Groups with ranges of about 30 cm and 60 cm were found to show the abrupt drop in the absorption-curve characteristic of Pose's results. (The present series of observations failed for purely technical reasons to give a conclusive result in the range 45 to 50 cm.) A "differential" curve neglecting the smallest deflections gave a maximum in the region 45 to 50 cm, suggesting the presence of a strong group of about this range. A discussion of other discrepancies in experimental data on the basis of FP-54 results must await further observations with a more suitable ?-particle source.

L. R. Hafstad

1933-08-01T23:59:59.000Z

33

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

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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...

34

Shell-model Monte Carlo studies of fp-shell nuclei  

Science Journals Connector (OSTI)

We study the gross properties of even-even and N=Z nuclei with A=4864 using shell-model Monte Carlo methods. Our calculations account for all 0?? configurations in the fp shell and employ the modified Kuo-Brown interaction KB3. We find good agreement with data for masses and total B(E2) strengths, the latter employing effective charges ep=1.35e and en=0.35e. The calculated total Gamow-Teller strengths agree consistently with the B(GT+) values deduced from (n,p) data if the shell-model results are renormalized by 0.64, as has already been established for sd-shell nuclei. The present calculations therefore suggest that this renormalization (i.e., gA=1 in the nuclear medium) is universal.

K. Langanke; D. J. Dean; P. B. Radha; Y. Alhassid; S. E. Koonin

1995-08-01T23:59:59.000Z

35

The Measurement of X-Ray Absorption Coefficients by the Use of the FP-54 Pliotron  

Science Journals Connector (OSTI)

The FP-54 pliotron has been used to measure the ionization currents produced in the determination of x-ray absorption coefficients. When careful shielding was made and proper insulation provided it was found to be extremely stable in the measurement of currents of the order of magnitude 310-15 amperes. The x-ray absorption coefficients of copper and aluminum were determined over a range from 0.25A to 0.6A. They were found to agree quite well with those obtained by other observers and led to a value of 2.7, in the wave-length range 0.25A to 0.6A, for the constant n in the absorption equation, ??=CN4?n+??.

L. M. Heil and J. E. Edwards

1933-01-01T23:59:59.000Z

36

Bistability in Communication Networks R.J. Gibbens 1 , P.J. Hunt 1 , and F.P. Kelly  

E-Print Network [OSTI]

Bistability in Communication Networks R.J. Gibbens 1 , P.J. Hunt 1 , and F.P. Kelly 1. Introduction technique, known as trunk reservation. 1 Supported by the SERC. #12; 114 Gibbens, Hunt, and Kelly Akinpelu others, Krupp (1982) and Kelly (1986), emerge naturally as fixed points of the integral equations we

Grimmett, Geoffrey

37

. SMP IBM RS6000 PowerPC 604e High Node 8 , SPEC95FP 103.su2cor,  

E-Print Network [OSTI]

-grain parallel processing, it is necessary to as- sign the appropriate number of processors, according95FP. 1. , , , , OSCAR 1),2) . , 3) (MTG) . y Dept. of Electrical, Electronics and Computer Engineer://www.apc.waseda.ac.jp/ , , , MTG MTG , . , MTG , . , , , . , , (IPA) . SUIF , 4) , , . , OSCAR 1 #12;5) . , , , . , , , . 2

Kasahara, Hironori

38

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

39

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

SciTech Connect (OSTI)

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

40

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

Note: This page contains sample records for the topic "fp a-e cr" 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

Optimal design of a robust discrete parallel FP+FI+FD controller for the Automatic Voltage Regulator system  

Science Journals Connector (OSTI)

Abstract The purpose of this paper is to design a good tracking controller for the generator Automatic Voltage Regulator (AVR) system. A fuzzy logic-based controller that is called Fuzzy P+Fuzzy I+Fuzzy D (FP+FI+FD) controller has been designed optimally and applied to AVR system. In the proposed method, optimal tuning of controller parameters is very important to achieve the desired level of robust performance. Thus, a hybrid of Genetic Algorithm (GA) and Particle Swarm Optimization (PSO) (HGAPSO) technique has been used to find a better fuzzy system control. The motivation for using this hybrid method is to increase disturbance rejection effort, reduce fuzzy system efforts and take large parametric uncertainties into account. The developed FP+FI+FD control strategy leads to a flexible controller with simple structure that is easy to implement. The simulation results have been compared with the conventional ProportionalIntegralDerivative (PID) and fuzzy PID controllers. Three cases of simulation have been performed, case 1: comparing the tracking capability of the controllers, case 2: comparing the disturbance rejection capability of the controller and case 3: evaluating the performance of the controllers assuming that amplifier and exciter system parameters have 50% uncertainty. The simulation results shows that the proposed parallel FP+FI+FD controller has good performance from the perspective of overshoot/undershoot, settling time, and rise time in comparison with both conventional and fuzzy PID controllers.

H. Shayeghi; A. Younesi; Y. Hashemi

2015-01-01T23:59:59.000Z

42

Crystallographic study of red fluorescent protein eqFP578 and its far-red variant Katushka reveals opposite pH-induced isomerization of chromophore  

SciTech Connect (OSTI)

The wild type red fluorescent protein eqFP578 (from sea anemone Entacmaea quadricolor, {lambda}{sub ex} = 552 nm, {lambda}{sub em} = 578 nm) and its bright far-red fluorescent variant Katushka ({lambda}{sub ex} = 588 nm, {lambda}{sub em} = 635 nm) are characterized by the pronounced pH dependence of their fluorescence. The crystal structures of eqFP578f (eqFP578 with two point mutations improving the protein folding) and Katushka have been determined at the resolution ranging from 1.15 to 1.85 {angstrom} at two pH values, corresponding to low and high level of fluorescence. The observed extinguishing of fluorescence upon reducing pH in eqFP578f and Katushka has been shown to be accompanied by the opposite trans-cis and cis-trans chromophore isomerization, respectively. Asn143, Ser158, His197 and Ser143, Leu174, and Arg197 have been shown to stabilize the respective trans and cis fluorescent states of the chromophores in eqFP578f and Katushka at higher pH. The cis state has been suggested as being primarily responsible for the observed far-red shift of the emission maximum of Katushka relative to that of eqFP578f.

Pletneva, Nadya V.; Pletnev, Vladimir Z.; Shemiakina, Irina I.; Chudakov, Dmitriy M.; Artemyev, Igor; Wlodawer, Alexander; Dauter, Zbigniew; Pletnev, Sergei (Russ. Acad. Sci.); (SAIC); (NCI)

2012-08-10T23:59:59.000Z

43

CR  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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.

44

CR  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

45

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

46

Thermodynamics of Cr2O3, FeCr2O4, ZnCr2O4 and CoCr2O4  

SciTech Connect (OSTI)

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

47

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"

48

CONVNIOS, PROJETOS, COOPERAES INTERNACIONAIS 2012-2013: Projeto MCT/CNPq No. 066/2010 (FP7-2011-EU-Brazil) "Technology  

E-Print Network [OSTI]

/2010 (FP7-2011-EU-Brazil) "Technology platform for point-of-care diagnostics for tropical deseases. 2010 - 2014: Titulo: P116M100008 - Sustainable Energy and Aeronautical Engineering - U.S.-Brazil Higher of Pittsburgh; Brazil Lead: Universidade Federal de Itajuba & Brazil Partner: Federal University of Parana

Paraná, Universidade Federal do

49

Comparison of isotropic elasto-plastic models for the plastic metric tensor $C_p=F_p^T\\, F_p$  

E-Print Network [OSTI]

We discuss in detail existing isotropic elasto-plastic models based on 6-dimensional flow rules for the positive definite plastic metric tensor $C_p=F_p^T\\, F_p$ and highlight their properties and interconnections. We show that seemingly different models are equivalent in the isotropic case.

Patrizio Neff; Ionel-Dumitrel Ghiba

2014-10-08T23:59:59.000Z

50

Carbon Resistive Random Access Memory Materials -CareRAMM An FP7 NMP Project led by the University of Exeter and in collaboration with IBM Research  

E-Print Network [OSTI]

Carbon Resistive Random Access Memory Materials - CareRAMM An FP7 NMP Project led by the University physical mechanism responsible for this resistive switching in carbon materials is not clear, with sp2 research and development of alternative data storage materials and concepts. The increasingly important

Mumby, Peter J.

51

Offshore wind resource assessment in European Seas, state-of-the art. A survey within the FP6 "POW'WOW" Coordination Action Project.  

E-Print Network [OSTI]

Offshore wind resource assessment in European Seas, state-of- the ­art. A survey within the FP6, Germany (5) FORWIND, University of Oldenburg, Germany ABSTRACT To plan an offshore wind farm, a careful the sea within about 50 km from the coast. However, installation of offshore high masts is very expensive

52

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

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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...

53

Midea: ENERGY STAR Referral (MWF-08CR)  

Broader source: Energy.gov [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.

54

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...

55

CR-B-02-02.PUB  

Broader source: Energy.gov (indexed) [DOE]

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

56

Summary of important results and SCDAP/RELAP5 analysis for OECD LOFT experiment LP-FP-2  

SciTech Connect (OSTI)

This report summarizes significant technical findings from the LP-FP-2 Experiment sponsored by the Organization of Economic Cooperation and Development (OECD). It was the second, and final, fission product experiment conducted in the Loss-of-Fluid Test (LOFT) facility at the Idaho National Engineering Laboratory. The overall technical objective of the test was to contribute to the understanding of fuel rod behavior, hydrogen generation, and fission product release, transport, and deposition during a V-sequence accident scenario that resulted in severe core damage. An 11 by 11 test bundle, comprised of 100 prepressurized fuel rods, 11 control rods, and 10 instrumented guide tubes, was surrounded by an insulating shroud and contained in a specially designed central fuel module, that was inserted into the LOFT reactor. The simulated transient was a V-sequence loss-of-coolant accident scenario featuring a pipe break in the low pressure injection system line attached to the hot leg of the LOFT broken loop piping. The transient was terminated by reflood of the reactor vessel when the outer wall shroud temperature reached 1517 K. With sustained fission power and heat from oxidation and metal-water reactions, elevated temperatures resulted in zircaloy melting, fuel liquefaction, material relocation, and the release of hydrogen, aerosols, and fission products. A description and evaluation of the major phenomena, based upon the response of on line instrumentation, analysis of fission product data, postirradiation examination of the fuel bundle, and calculations using the SCDAP/RELAP5 computer code, are presented.

Coryell, E.W. [EG and G Idaho, Inc., Idaho Falls, ID (United States)

1994-04-01T23:59:59.000Z

57

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

58

CR-B-02-01.PDF  

Broader source: Energy.gov (indexed) [DOE]

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

59

SF 6432-FP ( -94)  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

1- SF 6432-NI (04-95) SECTION II STANDARD TERMS AND CONDITIONS FOR FIXED PRICE CONTRACTS WITH THE NEW INDEPENDENT STATES (NIS) OF THE FORMER SOVIET UNION INDEX OF CLAUSES THE...

60

EUFAR FP5  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

University of Mainz, Germany Peter Pilewskie, University of Colorado, Boulder, CO, USA Anthony Bucholtz, Naval Research Laboratory, Monterey, CA, USA Samuel Hall, NCAR,...

Note: This page contains sample records for the topic "fp a-e cr" 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.


61

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

SciTech Connect (OSTI)

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

62

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

63

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

64

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

65

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

SciTech Connect (OSTI)

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

66

Department of Energy Acquisition Regulation Solicitation Provision and Contract Clause Matrix  

Broader source: Energy.gov (indexed) [DOE]

Cost Reimbursement Construction I Contract Clauses Cost Reimbursement Construction I Contract Clauses T&M LH Time & Material/Labor Hours K Representations FP A-E Fixed Price Architect-Engineer L Instructions CR A-E Cost Reimbursement Architect-Engineer Com Item Commercial Item M&O Management and Operating OFM Other DOE Facility Management SAP Simplified Acquisition Procedures (excluding micro-purchase) UCF Loc., FP Sup CR Sup FP Serv CR Serv FP CON CR CON T&M LH FP A-E CR A- E Com Item M & O Other Fac. Mgmt S A P 952.202-1 Definitions. I R R R R R R R R R R R R NA 952.203-70 Whistleblower Protection for contractor employees (Work performed in DOE owned or leased facilities). I NA NA A A A A A NA NA NA R R NA Remember the DEAR Security clauses, -2 thru. -73 below go in DOE contracts not the FAR clause if there is access to restricted data,

67

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.

68

Microsoft Word - CR-AH Policy.doc  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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...

69

Using CrAIN Multilayer Coatings to Improve Oxidation Resistance...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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...

70

CR mammography: Design and implementation of a quality control program  

SciTech Connect (OSTI)

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

71

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

SciTech Connect (OSTI)

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

72

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 (OSTI)

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

73

Data:09310e5a-e2c6-4eb6-87f8-f986205654c8 | Open Energy Information  

Open Energy Info (EERE)

a-e2c6-4eb6-87f8-f986205654c8 a-e2c6-4eb6-87f8-f986205654c8 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Atlantic City Electric Co Effective date: 2012/11/01 End date if known: Rate name: AGS Primary FP<500kW Sector: Industrial Description: Available at any point of Company's system where facilities of adequate character and capacity exist for the entire electric service requirements of any customer contracting for annual service delivered at one point and metered at or compensated to the voltage of delivery. This is a bundled Service. Source or reference: http://www.atlanticcityelectric.com/_res/documents/NJTariffSectionIV.pdf

74

Fixed Price General Provisions for Supplies/Services -Foreign Battelle Memorial Institute Page 1 of 23 Form A-110-Foreign-FP-R8 (March 2013) Pacific Northwest National Laboratory  

E-Print Network [OSTI]

Price General Provisions for Supplies/Services - Foreign Battelle Memorial Institute Page 1 of 23 Form A-110-Foreign-FP-R8 (March 2013) Pacific Northwest National Laboratory GENERAL PROVISIONS Fixed Price) _______________________________________________________ 3 Changes ­ Fixed Price (cl. F-746b ­ Jan 2010

75

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

76

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

77

CR-L-01-06.PDF  

Broader source: Energy.gov (indexed) [DOE]

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

78

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

79

PARS II Change Request (CR) Form  

Broader source: Energy.gov (indexed) [DOE]

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.

80

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...

Note: This page contains sample records for the topic "fp a-e cr" 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.


81

The fast-spectrum transmutation experimental facility FASTEF: Main design achievements (Part 1: Core and primary system) within the FP7-CDT collaborative project of the European Commission  

SciTech Connect (OSTI)

MYRRHA (Multi-purpose hybrid Research Reactor for High-tech Applications) is the flexible experimental accelerator-driven system (ADS) in development at SCK CEN in replacement of its material testing reactor BR2. SCK CEN in association with 17 European partners from industry, research centres and academia, responded to the FP7 (Seventh Framework Programme) call from the European Commission to establish a Central Design Team (CDT) for the design of a Fast Spectrum Transmutation Experimental Facility (FASTEF) able to demonstrate efficient transmutation and associated technology through a system working in subcritical and/or critical mode. The project has started on April 01, 2009 for a period of three years. In this paper, we present the latest configuration of the reactor core and primary system. The FASTEF facility has evolved quite a lot since the intermediate reporting done at the ICAPP'10 and ICAPP'11 conferences 1 2. If it remains a small-scale facility, the core power amounts now up to 100 MWth in critical mode. In a companion paper 3, we present the concept of the reactor building and the plant layout. (authors)

De Bruyn, D.; Fernandez, R. [Belgian Nuclear Research Centre (SCK CEN), Boeretang 200, 2400 Mol (Belgium); Mansani, L. [ANSALDO, Corso Perrone 25, 16152 Genova (Italy); Woaye-Hune, A. [AREVA-NP, rue Juliette Recamier 10, 69456 Lyon Cedex 06 (France); Sarotto, M. [ENEA, Via Martiri di Monte Sole 4, 40129 Bologna (Italy); Bubelis, E. [KIT, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen (Germany)

2012-07-01T23:59:59.000Z

82

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

83

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

84

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

85

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

86

Phase stability and elastic properties of Cr-V alloys  

SciTech Connect (OSTI)

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

87

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

SciTech Connect (OSTI)

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

88

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

SciTech Connect (OSTI)

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

89

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

SciTech Connect (OSTI)

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

90

Nitrate Enhanced Microbial Cr(VI) Reduction-Final Report  

SciTech Connect (OSTI)

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

91

Metastable bcc phase formation in the Nb-Cr system  

SciTech Connect (OSTI)

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

92

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.

93

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

94

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

95

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"

96

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

97

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

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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...

98

Thermal stability and oxidation resistance of TiCrAlYO coatings...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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...

99

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

Broader source: Energy.gov (indexed) [DOE]

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...

100

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

Note: This page contains sample records for the topic "fp a-e cr" 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.


101

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

Broader source: Energy.gov (indexed) [DOE]

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...

102

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

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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

103

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

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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...

104

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

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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

105

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

106

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

SciTech Connect (OSTI)

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

107

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

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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)...

108

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

109

Partially filled intermediate band of Cr-doped GaN films  

SciTech Connect (OSTI)

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

110

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

SciTech Connect (OSTI)

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

111

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

112

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.

113

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

114

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.

115

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

SciTech Connect (OSTI)

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

116

Department of Energy Acquisition Regulation Solicitation Provision and Contract Clause Matrix  

Broader source: Energy.gov (indexed) [DOE]

L A A A A A A A A A NA A A A L A A A A A A A A A NA A A A UCF Loc., FP Sup CR Sup FP Serv CR Serv FP CON CR CON T&M LH FP A-E CR A- E Com Item M & O Other Fac. Mgmt S A P 952.204-75 Public Affairs. I NA NA A A NA NA NA NA NA NA R R A 952.204-76 Conditional payment of fee or profit - Safeguarding restricted data and other classified information. I A A A A A A NA A A NA NA A A 952.204-77 Computer security I A A A A A A A A A A R R A 952.208-7 Tagging of leased vehicles. I NA NA A A A A NA A A NA A A A 952.208-70 Printing (Non M&O) I R R R R R R R R R NA NA R R The 952.209 OCI coverage below is required for advisory and assistance service contracts See 970.0905 and 909.507-2(b) for M&O and OFM solicitations and contracts 952.209-8 Organizational Conflicts of Interest -

117

Department of Energy Acquisition Regulation Solicitation Provision and Contract Clause Matrix  

Broader source: Energy.gov (indexed) [DOE]

K A A A A A A A A A NA A A A K A A A A A A A A A NA A A A UCF Loc., FP Sup CR Sup FP Serv CR Serv FP CON CR CON T&M LH FP A-E CR A- E Com Item M & O Other Fac. Mgmt S A P 952.204-75 Public Affairs. I NA NA A A NA NA A NA NA NA R R A 952.204-76 Conditional payment of fee or profit - Safeguarding restricted data and other classified information. I A A A A A A A A A NA NA A A 952.204-77 Computer security I A A A A A A A A A A R R A 952.208-7 Tagging of leased vehicles. I A A A A A A A A A NA A A A 952.208-70 Printing I R R R R R R R R R NA NA R R The 952.209 OCI coverage below is required for advisory and assistance service contracts 952.209-8 Organizational Conflicts of Interest - Disclosure (R for advisory and asst. sup. serv.) K NA NA A A NA NA A NA NA NA A A NA

118

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

119

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.

120

Three dimensional magnetism and coupling to conduction electrons in PdCrO2  

SciTech Connect (OSTI)

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

Note: This page contains sample records for the topic "fp a-e cr" 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

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

122

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

123

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

124

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

125

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

SciTech Connect (OSTI)

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

126

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

127

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

128

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.

129

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

130

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

131

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

132

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

SciTech Connect (OSTI)

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

133

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

134

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

135

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

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

136

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

137

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

138

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

139

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

SciTech Connect (OSTI)

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

140

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

SciTech Connect (OSTI)

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

Note: This page contains sample records for the topic "fp a-e cr" 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

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

142

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.

143

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

144

The Fast-spectrum Transmutation Experimental Facility FASTEF: Main design achievements (part 2: Reactor building design and plant layout) within the FP7-CDT collaborative project of the European Commission  

SciTech Connect (OSTI)

MYRRHA (Multi-purpose hybrid Research Reactor for High-tech Applications) is the flexible experimental accelerator-driven system (ADS) in development at SCK-CEN in replacement of its material testing reactor BR2. SCK-CEN in association with 17 European partners from industry, research centres and academia, responded to the FP7 (Seventh Framework Programme) call from the European Commission to establish a Central Design Team (CDT) for the design of a Fast Spectrum Transmutation Experimental Facility (FASTEF) able to demonstrate efficient transmutation and associated technology through a system working in subcritical and/or critical mode. The project has started on April 01, 2009 for a period of three years. In this paper, we present the latest concept of the reactor building and the plant layout. The FASTEF facility has evolved quite a lot since the intermediate reporting done at the ICAPP'10 and ICAPP'11 conferences 1,2. Many iterations have been performed to take into account the safety requirements. The present configuration enables an easy operation and maintenance of the facility, including the possibility to change large components of the reactor. In a companion paper 3, we present the latest configuration of the reactor core and primary system. (authors)

De Bruyn, D.; Engelen, J. [Belgian Nuclear Research Centre SCK CEN, Boeretang 200, 2400 Mol (Belgium); Ortega, A.; Aguado, M. P. [Empresarios Agrupados A.I.E., Magallanes 3, 28015 Madrid (Spain)

2012-07-01T23:59:59.000Z

145

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

146

Electrochemical Testing of Ni-Cr-Mo-Gd Alloys  

SciTech Connect (OSTI)

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

147

Steamside Oxidation Behavior of Experimental 9%Cr Steels  

SciTech Connect (OSTI)

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

148

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

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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)

149

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

Broader source: Energy.gov (indexed) [DOE]

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...

150

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...

151

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

152

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

SciTech Connect (OSTI)

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

153

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

154

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

155

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

156

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

157

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...

158

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

159

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

160

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

Note: This page contains sample records for the topic "fp a-e cr" 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

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

162

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

163

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

164

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

165

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

166

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:...

167

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

168

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

169

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

170

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

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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...

171

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

172

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

Broader source: Energy.gov (indexed) [DOE]

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

173

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

SciTech Connect (OSTI)

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

174

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

175

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

176

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

177

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

178

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

SciTech Connect (OSTI)

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

179

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

180

Theoretical investigation of spin-filtering in CrAs/GaAs heterostructures  

SciTech Connect (OSTI)

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

Note: This page contains sample records for the topic "fp a-e cr" 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

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

SciTech Connect (OSTI)

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

182

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

183

Muller-Karger, F.E., M.T. Kavanaugh, E. Montes, W.M. Balch, M. Breitbart, F.P. Chavez, S.C. Doney, E.M. Johns, R.M. Letelier, M.W. Lomas, H.M. Sosik, and A.E. White. 2014. A framework for  

E-Print Network [OSTI]

and of the Intergovernmental Platform on Biodiversity and Ecosystem Services (http://www.ipbes.net). The tools needed of the marine food web, play critical roles in global biogeochemistry, and are highly sensitive to ecosystem a wide variety of important consequences for aquatic life, including fertilization of the ocean

184

9Fp Fermi 2/11/00  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

J J a n e M o n h a r t 8 S a f e t y R e c o r d K e e p s I m p r o v i n g 1 0 G u i d e t o W i l s o n H a l l C o n s t r u c t i o n 1 3 Ta l k o f t h e L a b Shutdown marks end of era for 800 GeV fixed-target program 2 F E R M I L A B A U. S. D E P A R T M E N T O F E N E R G Y L A B O R A T O R Y F N E E R W M S I Volume 23 Friday, February 11, 2000 Number 3 f Fermilab Photo by Mike Perricone It was an era of great growth, sometimes instantaneous growth. ÒOne of my fondest memories is of becoming an extraction expert,Ó said Roger Dixon, whose Fermilab career began in the Switchyard, extracting beam from the old Main Ring and sending it to the fixed-target experimental areas, a quarter-century ago or thereabouts. About two months into his Lab career, Dixon received a 3 a.m. call at home. There was a beam problem. He jumped into his car and sped to the Lab. ÒWhen I arrived,Ó he recalled, ÒI was

185

ESH100.2.FP.1  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

1 1 Procedure Title Manage Fire Protection Requirements Procedure Manager D'ANTONIO, PERRY E. Status Active Subject Matter Expert Laura D. Draelos Aden C. Jackson (CA) Applicability, Exceptions, and Consequences This corporate procedure applies to all Sandia National Laboratories (SNL) organizations, all management elements, all SNL sites, and all Members of the Workforce. Exceptions to, or deviations from, this procedure must be approved through the Executive Policy Sponsor or Policy Area Manager, if delegatedview Contacts for Corporate Policy System Policies, Processes, and Procedures. See CG100.1.7, Request an Exception to a Policy, Process, or Procedure, for directions on how to obtain an exception to this procedure. Granting or permitting exceptions or violations of policy, process, or

186

FP March 2011 Page 1 of 13  

E-Print Network [OSTI]

) Government means the United States of America and includes the U.S. Department of Energy (DOE) or any duly22725 with DOE. (c) Seller means the person or organization that has entered into this Agreement. (d) Agreement means Purchase Order, Subcontract, Price Agreement, AVID Agreement, Basic Ordering Agreement, Task

187

FP January 2012 Page 1 of 13  

E-Print Network [OSTI]

) Government means the United States of America and includes the U.S. Department of Energy (DOE) or any duly22725 with DOE. (c) Seller means the person or organization that has entered into this Agreement. (d) Agreement means Purchase Order, Subcontract, Price Agreement, AVID Agreement, Basic Ordering Agreement, Task

188

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

SciTech Connect (OSTI)

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

189

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

SciTech Connect (OSTI)

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

190

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.

191

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

SciTech Connect (OSTI)

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

192

.,~ .\\DOCKET . 1'-frA-e1Z--L  

E-Print Network [OSTI]

include an additional requirement of a minimum standard for power factor. The proposed efficiency.,~ .\\DOCKET . 1'-frA-e1Z--L DATE ,STATE OF CALIFORNIA REeD.JAN 1'l l012 ENERGY RESOURCES CONSERVATION AND DEVELOPMENT COMMISSION Appliance Efficiency Regulations ) ) ) Docket No. ll-AAER-2 Order

193

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

SciTech Connect (OSTI)

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

194

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

SciTech Connect (OSTI)

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

195

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

196

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 (OSTI)

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

197

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

Broader source: Energy.gov (indexed) [DOE]

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

198

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

SciTech Connect (OSTI)

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

199

CrRb: A molecule with large magnetic and electric dipole moments  

SciTech Connect (OSTI)

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

200

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

SciTech Connect (OSTI)

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 "fp a-e cr" 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

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

SciTech Connect (OSTI)

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

202

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

Broader source: Energy.gov (indexed) [DOE]

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.

203

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 (OSTI)

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

204

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

SciTech Connect (OSTI)

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

205

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

SciTech Connect (OSTI)

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

206

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

207

Microstructure and High Temperature Oxidation Behavior of Cr-W Alloys  

SciTech Connect (OSTI)

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

208

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

SciTech Connect (OSTI)

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

209

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

SciTech Connect (OSTI)

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

210

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

211

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

212

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

SciTech Connect (OSTI)

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

213

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

214

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

215

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

216

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

SciTech Connect (OSTI)

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

217

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

218

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

219

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

SciTech Connect (OSTI)

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

220

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

SciTech Connect (OSTI)

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 "fp a-e cr" 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

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

SciTech Connect (OSTI)

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

222

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

Broader source: Energy.gov (indexed) [DOE]

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

223

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

224

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.

225

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.

226

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.

227

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.

228

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.

229

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.

230

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

231

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.

232

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

233

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.

234

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.

235

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

236

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

SciTech Connect (OSTI)

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

237

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

SciTech Connect (OSTI)

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

238

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

239

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

240

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

SciTech Connect (OSTI)

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 "fp a-e cr" 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.


241

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

242

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

243

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

SciTech Connect (OSTI)

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

244

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

245

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

246

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

247

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

248

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.

249

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

250

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

251

LS-ll D. Y. Smith and A. E. Williamsont  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ll ll D. Y. Smith and A. E. Williamsont December 15, 1984 Optical Properties at X-ray Energies of Reflecting Elements for Synchrotron Radiation Sources* Summary Preliminary results are reported for the optical constants at x-ray wavelengths of elements commonly used for x-ray mirrors and multilayer reflectors. The data were derived from measured absorption spectra using a dispersion theory-sum rule analysis. Introduction The optical properties of materials in the x-ray range are of increasing interest in conjunction with the development of instrumentation for synchrotron radiation sources,l particularly for the design of mirrors 2 and mutlilayer 3 reflectors and filters. This letter is a preliminary report of a method for calculating these properties from presently available absorption

252

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

SciTech Connect (OSTI)

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

253

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

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

254

Magnetization switching of rare earth orthochromite CeCrO{sub 3}  

SciTech Connect (OSTI)

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

255

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

256

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

SciTech Connect (OSTI)

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

257

Absence of long-range chemical ordering in equimolar FeCoCrNi  

SciTech Connect (OSTI)

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

258

Absence of long-range chemical ordering in equimolar FeCoCrNi  

SciTech Connect (OSTI)

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

259

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

260

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

Note: This page contains sample records for the topic "fp a-e cr" 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

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

262

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

263

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

SciTech Connect (OSTI)

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

264

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

SciTech Connect (OSTI)

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

265

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

266

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

267

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.

268

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

269

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

270

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

SciTech Connect (OSTI)

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

271

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

SciTech Connect (OSTI)

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

272

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

273

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

274

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

275

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

SciTech Connect (OSTI)

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

276

Letter Report Documenting Progress of Second Generation ATF FeCrAl Alloy Fabrication  

SciTech Connect (OSTI)

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

277

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

278

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

SciTech Connect (OSTI)

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

279

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

280

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

Note: This page contains sample records for the topic "fp a-e cr" from the National Library of EnergyBeta (NLEBeta).
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281

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

SciTech Connect (OSTI)

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

282

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

SciTech Connect (OSTI)

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

283

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

SciTech Connect (OSTI)

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

284

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

SciTech Connect (OSTI)

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

285

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

SciTech Connect (OSTI)

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

286

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

SciTech Connect (OSTI)

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

287

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

288

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

SciTech Connect (OSTI)

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

289

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

SciTech Connect (OSTI)

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

290

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

SciTech Connect (OSTI)

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

291

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

292

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

SciTech Connect (OSTI)

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

293

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

SciTech Connect (OSTI)

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

294

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

295

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

296

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

SciTech Connect (OSTI)

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

297

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

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

298

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

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

299

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

Broader source: Energy.gov (indexed) [DOE]

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

300

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

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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 "fp a-e cr" 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.


301

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

302

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

SciTech Connect (OSTI)

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

303

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

SciTech Connect (OSTI)

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

304

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

SciTech Connect (OSTI)

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

305

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

306

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

SciTech Connect (OSTI)

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

307

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

SciTech Connect (OSTI)

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

308

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

SciTech Connect (OSTI)

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

309

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.

310

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

SciTech Connect (OSTI)

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

311

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

312

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

313

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.

314

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

SciTech Connect (OSTI)

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

315

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

316

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

317

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.

318

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

SciTech Connect (OSTI)

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

319

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

320

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 "fp a-e cr" 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

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

322

U.S. Energy Secretary Bodman Visits U.A.E. | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

U.S. Energy Secretary Bodman Visits U.A.E. U.S. Energy Secretary Bodman Visits U.A.E. U.S. Energy Secretary Bodman Visits U.A.E. November 12, 2005 - 2:24pm Addthis ABU DHABI, U.A.E. -Secretary of Energy Samuel W. Bodman today visited the United Arab Emirates (U.A.E.), the first stop in his four-nation swing through the Middle East. Secretary Bodman expressed his gratitude, on behalf of the United States, to the U.A.E. for their support and contributions to those affected by the hurricanes that hit the Gulf of Mexico region earlier this year, and their committed response to help keep world oil markets stable. "Our domestic and international oil markets were affected by the uncertainty that was caused by the hurricanes that hit the Gulf of Mexico this summer, but thanks to the leadership in countries like the U.A.E., the

323

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

324

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

SciTech Connect (OSTI)

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

325

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

SciTech Connect (OSTI)

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

326

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

SciTech Connect (OSTI)

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

327

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

328

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

SciTech Connect (OSTI)

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

329

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

330

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

SciTech Connect (OSTI)

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

331

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

332

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

SciTech Connect (OSTI)

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

333

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

SciTech Connect (OSTI)

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

334

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

SciTech Connect (OSTI)

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

335

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

SciTech Connect (OSTI)

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

336

Federal Acquisition Regulation Clause Usage Guide  

Broader source: Energy.gov (indexed) [DOE]

to see its text and to see its text and prescription FP Sup . CR Sup. FP Serv . Cos t Ser v. FP Cons . Cost Con s. T&M . L.H. F P A- E Cos t A-E Com. Item s. M& O Other Fac. Mgmt . SAP 52.202-1 Definitions. R R R R R R R R R R R NA 52.203-2 Certificate of Independent Price Determination. R NA R NA R NA NA R NA R NA NA NA 52.203-3 Gratuities. R R R R R R R R R R R R NA 52.203-5 Covenant Against Contingent Fees. R R R R R R R R R R R R NA 52.203-6 Restrictions on Subcontractor Sales to the Government. R R R R NA NA R N A NA R R R NA Alternate I NA NA NA NA NA NA NA N A NA R NA NA NA 52.203-7 Anti-Kickback Procedures. R R R R R R R R R NA R R NA 52.203-8 Cancellation, Rescission, and Recovery of Funds for Illegal or Improper Activity. R R R R R R R R R NA R R R

337

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

338

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

339

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

340

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

SciTech Connect (OSTI)

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

Note: This page contains sample records for the topic "fp a-e cr" 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

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

SciTech Connect (OSTI)

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

342

411 / 2011 / 01 fp Grounds RFP v6  

E-Print Network [OSTI]

OF THE UNIVERSITY'S GROUNDS AND OUTDOOR SPORTS FACILITIES MAINTENANCE AND RELATED ANCILLARY AND COMPLEMENTARY....................................................................................... 5 2.4. MAINTENANCE CONTRACT one or more suitably qualified and experienced landscape and turf grass contractors to manage

343

SF6432-FP (02-01-12) Firm Fixed Price  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

any such subcontract. TAXES For many purchases, Sandia can provide Transaction Exemption Certificates for both New Mexico and California, and certificates for other states may...

344

Microsoft Word - Annual FP Summary Information Reporting Guide...  

Office of Environmental Management (EM)

or other nuclear accident, miscellaneous accidents (such as thermal, chemical, or corrosion-related accidents). Summaries should include information on the actuation of any...

345

Presentation of FP7 matter project: general overview  

SciTech Connect (OSTI)

The 2010-2012 implementation plan of the European Sustainable Nuclear Industrial Initiative (ESNII), prepared in the frame of the Sustainable Nuclear Energy Technology Platform (SNETP), establishes a very tight time schedule for the start of construction of the European Gen IV prototypes; namely the construction of the LFR ETPP (European Technology Pilot Plant) MYRRHA will start in 2014 and that of the SFR Prototype ASTRID will start in 2017. The GEN IV reactors pose new challenges to the designers and scientists in terms of higher operating temperature, higher fuel burn-up, and in some cases more corrosive environment with respect to the present technologies and which impacts the materials performance. In this frame, the MATTER (Materials Testing and Rules) Project starts well targeted R and D activities to perform careful materials studies in GEN IV operational conditions and to find out criteria for the correct use of these materials in relevant reactor applications. Aim of the MATTER Project (that involved 27 partners and will end in 2015) is to complement the materials researches, in the frame of the European Energy Research Alliance (EERA) guidelines, with the implementation of pre-normative rules. The MATTER Project is divided in 3 technical Domains (called DM): DM1 - Development of test and evaluation guidelines for structural materials: to develop/establish best practice guidelines for testing and evaluation procedures, which are aimed to screen and characterize nuclear materials for innovative nuclear systems. DM2 - Pre-normative R and D for Codes and Standards: Pre-normative activities are performed, comprehensive of experiments, to revise and update the design rules (with an EU level consensus) in order to answer to some short term needs of the two projects ASTRID and MYRRHA with respect to the design and the construction of structural components. DM3 - Joint Program Scheme, implementation and Priorities: to optimise the effectiveness and efficiency of the EERA Joint Program on nuclear materials for innovative reactors and to support specific research activities related to fundamental understanding of ODS steels fabrication. ODS steels are considered candidate materials, in the medium-long term, for high fuel burn-up cladding application. After a brief presentation of DM1 and DM3, this paper mainly focuses on description of Pre-normative R and D activities for Codes and Standards (DM2). (authors)

Lebarbe, T.; Marie, S. [CEA Saclay, DEN-DANS-DM2S, Gif-sur-Yvette, (France); Agostini, Pietro [ENEA, Camiugnano, (Italy); Fazio, Concetta [KIT, Eggenstein Leopoldshafen, (Germany); Gavrilov, Serguei [SCK-CEN, Mol, (Belgium)

2012-07-01T23:59:59.000Z

346

Position Paper on Systems and Control in FP8  

E-Print Network [OSTI]

&D HONEYWELL Mike SOUTHGATE Vice-President EMEA Honeywell EnvCombustion Controls INEOS David EMBLETON, O

Paris-Sud XI, Université de

347

Building links with partners and FP7 Proposal Writing  

E-Print Network [OSTI]

for the Electricity Networks of the Future European Technology Platform for Wind Energy ­ TPWind European Technology Define Strategic Research Agenda Implement Strategic Agenda Industry-led stakeholder forums on Europe's key research challenges #12;http://www.ukro.ac.uk

Royal Holloway, University of London

348

OSCAR Chip Multiprocessor (OSCAR CMP) SPEC fp 2000/95  

E-Print Network [OSTI]

) 2.1 BPA RB SB MT 11) MT BPA RB SB MT MFG 12),15) MFG MT 12),15) MTG 12),15) MTG MTG MT PG MTG MT MT PG SB RB SB RB 16) 2.2 PG MT Doall RB RB PG PE PE 17) 2.3 PG MT BPA RB PG PE BPA BPA PE OSCAR FORTRAN PE CP/DT/MISF CP/ETF/MISF ETF/CP DT/CP 15) 4 BPA PE PE PE 2.4 OSCAR CMP OSCAR CMP fork join 14) 1(b

Kasahara, Hironori

349

SANDIA CORPORATION SF 6432-FP (04-08)  

E-Print Network [OSTI]

means Purchase Order, Contract, Price Agreement, Subcontract, Ordering Agreement, or modifications or services ordered under this contract, agrees to comply with all the Ts&Cs and all specifications and other be transferred from Sandia to U.S. Department of Energy/National Nuclear Security Administration (DOE

350

Interests & Recruitment In Science http://iris.fp-7.org/  

E-Print Network [OSTI]

in the first decades of the 21st century, for instance within renewable energy, communication, agricultural and Mathematics (STEM) disciplines is essential in order to meet some of the great challenges the world faces growth and stability in individual countries and regions (EU, 2010). However, there is widespread concern

Johansen, Tom Henning

351

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

352

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.

353

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 (OSTI)

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

354

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 (OSTI)

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

355

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

SciTech Connect (OSTI)

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

356

Energia Servizi Engineering SpA E S Engineering | Open Energy Information  

Open Energy Info (EERE)

Servizi Engineering SpA E S Engineering Servizi Engineering SpA E S Engineering Jump to: navigation, search Name Energia & Servizi Engineering SpA (E&S Engineering) Place Rome, Italy Sector Hydro, Wind energy Product Italian developer of biogas, wind, mini-hydro and PV projects. Coordinates 41.90311°, 12.49576° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":41.90311,"lon":12.49576,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

357

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 (OSTI)

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

358

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

SciTech Connect (OSTI)

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

359

Resonant plasmon scattering by discrete breathers in Josephson junction ladders A. E. Miroshnichenko,1  

E-Print Network [OSTI]

Resonant plasmon scattering by discrete breathers in Josephson junction ladders A. E scattering by discrete breathers in Josephson junction ladders. DOI: 10.1103/PhysRevB.71.174306 PACS number Josephson junction systems,2 coupled nonlinear optical waveguides,3 lattice vi- brations in crystals,4

Flach, Sergej

360

Resonant plasmon scattering by discrete breathers in Josephson junction ladders A. E. Miroshnichenko,1  

E-Print Network [OSTI]

Resonant plasmon scattering by discrete breathers in Josephson junction ladders A. E in Josephson junction ladders. We predict the existence of Fano resonances, and find them by computing in the plasmon scattering by discrete breathers in Josephson junction ladders. DOI: 10.1103/PhysRevB.71

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361

History of cosmic ray research in Finland I.G. Usoskin a,*, E. Valtonen b  

E-Print Network [OSTI]

History of cosmic ray research in Finland I.G. Usoskin a,*, E. Valtonen b , R. Vainio c , P The history of cosmic ray research in Finland can be traced back to the end of 1950s, when first ground on-line database in Oulu and a new muon measuring underground site in Pyha¨salmi. Research groups

Usoskin, Ilya G.

362

Indoor exposure from building materials: A field study Dafni A. Missia a,*, E. Demetriou b  

E-Print Network [OSTI]

conducted in the frame of BUMA (Prioritization of Building Materials Emissions as indoor pollution sourcesIndoor exposure from building materials: A field study Dafni A. Missia a,*, E. Demetriou b , N. Michael b , E.I. Tolis a , J.G. Bartzis a a University of West Macedonia, Environmental Technology

Short, Daniel

363

Metastable high-pressure transformations of orthoferrosilite Fs82 Przemyslaw Dera a,e,  

E-Print Network [OSTI]

Metastable high-pressure transformations of orthoferrosilite Fs82 Przemyslaw Dera a,e, , Gregory J Institution of Washington, USA e Hawaii Institute of Geophysics and Planetology, School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, USA a r t i c l e i n f o Article history: Received

Duffy, Thomas S.

364

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

SciTech Connect (OSTI)

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

365

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

SciTech Connect (OSTI)

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

366

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

SciTech Connect (OSTI)

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

367

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

SciTech Connect (OSTI)

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

368

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

SciTech Connect (OSTI)

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

369

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

370

Corrective Action Decision Document/Closure Report for Corrective Action Unit 482: Area 15 U15a/e Muckpiles and Ponds Nevada Test Site  

SciTech Connect (OSTI)

This Corrective Action Decision Document /Closure Report (CADD/CR) was prepared by the Defense Threat Reduction Agency (DTRA) for Corrective Action Unit (CAU) 482 U15a/e Muckpiles and Ponds. This CADD/CR is consistent with the requirements of the Federal Facility Agreement and Consent Order agreed to by the State of Nevada, the U.S. Department of Energy, and the U.S. Department of Defense. Corrective Action Unit 482 is comprised of three Corrective Action Sites (CASs) and one adjacent area: CAS 15-06-01, U15e Muckpile; CAS 15-06-02, U15a Muckpile; CAS 15-38-01, Area 15 U15a/e Ponds; and Drainage below the U15a Muckpile. The purpose of this CADD/CR is to provide justification and documentation supporting the recommendation for closure with no further corrective action, by placing use restrictions on the three CASs and the adjacent area of CAU 482. To support this recommendation, a corrective action investigation (CAI) was performed in September 2002. The purpose of the CAI was to fulfill the following data needs as defined during the Data Quality Objective (DQO) process: (1) Determine whether contaminants of concern (COCs) are present. (2) If COCs are present, determine their nature and extent. (3) Provide sufficient information and data to determine appropriate corrective actions. The CAU 482 dataset from the CAI was evaluated based on the data quality indicator parameters. This evaluation demonstrated the quality and acceptability of the dataset for use in fulfilling the DQO data needs. Analytes detected during the CAI were evaluated against final action levels (FALs) established in this document. Tier 2 FALS were determined for the hazardous constituents of total petroleum hydrocarbons (TPH)-diesel-range organics (DRO) and the radionuclides americium (Am)-241, cesium (Cs)-137, plutonium (Pu)-238, and Pu-239. The Tier 2 FALs were calculated for the radionuclides using site-specific information. The hazardous constituents of TPH-DRO were compared to the PALs defined in the CAIP, and because none of the preliminary action levels (PALs) were exceeded, the PALs became the FALs. The radionuclide FALs were calculated using the Residual Radioactive (RESRAD) code (version 6.21). The RESRAD calculation determined the activities of all radionuclides that together would sum to an exposure dose of 25 millirem per year to a site receptor (based on their relative abundances at each CAS). Based on the field investigation, the following contaminants were determined to be present at concentrations exceeding their corresponding FALs: (1) CAS 15-06-01 - None. (2) CAS 15-06-02 - Cs-137 and Pu-239. (3) CAS 15-38-01 - Am-241, Cs-137, Pu-238, and Pu-239. (4) Drainage below CAS 15-06-02 - Cs-137 and Pu-239. Based on the data and risk evaluations, the DQO data needs presented in the Corrective Action Investigation Plan were met, and the data accurately represent the radiological and chemical risk present at CAU 482. Based on the results of the CAI data evaluation, it was determined that closure in place with use restrictions is the appropriate corrective action for CAU 482 and that use restrictions will effectively control exposure to future land users. This is based on the fact that even though the FALs were exceeded in a few samples, this remote, controlled access site poses only limited risk overall to public health and the environment. Given the relatively low levels of contamination present, it would create a greater hazard to worker safety, public health, and the environment to remove the contamination, transport it, and bury it at another location. Therefore, DTRA provides the following recommendations: (1) Close COCs in place at CAS 15-06-02, CAS 15-38-01, and the drainage below CAS 15-06-02 with use restrictions. (2) No further action for CAU 482. (3) A Notice of Completion be issued to DTRA by the Nevada Division of Environmental Protection for closure of CAU 482. (4) Move CAU 482 from Appendix III to Appendix IV of the Federal Facility Agreement and Consent Order.

NSTec Environmental Restoration

2009-09-30T23:59:59.000Z

371

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

372

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

373

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

374

A. E. K. Ris Ris-M-QiE Title and authors)  

E-Print Network [OSTI]

, thyristor power-supply for a heat- transfer experimental-loop, are discussed. This is partly based on a new ELECTRIC POWER HEAT TRANSFER POWER SUPPLIES RECTIFIERS SIMULATION SURGES THYRISTORS ISBN 87-550-C+7I-8 #12A. E. K. Risø Risø-M-QiE oo I Q CO Title and authors) Thyristor Power Supply Filtering for a 0.5 MW

375

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

SciTech Connect (OSTI)

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

376

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

SciTech Connect (OSTI)

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

377

I D A E Instituto para la Diversificacion y Ahorro de la Energia | Open  

Open Energy Info (EERE)

D A E Instituto para la Diversificacion y Ahorro de la Energia D A E Instituto para la Diversificacion y Ahorro de la Energia Jump to: navigation, search Name I D A E (Instituto para la Diversificacion y Ahorro de la Energia) Place Madrid, Spain Zip 28004 Product Madrid-based state-owned business entity that reports to the Ministry of Industry, Tourism and Trade through the State Secretary for Energy. Website http://www.idae.es/ Coordinates 40.4203°, -3.705774° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":40.4203,"lon":-3.705774,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

378

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

379

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

380

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

Note: This page contains sample records for the topic "fp a-e cr" 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

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

382

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

383

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

SciTech Connect (OSTI)

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

384

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.

385

Page 1 A E Costley, BPS Workshop II, General Atomics, 1 3 May 2001 DIAGNOSTICS FOR BURNING PLASMA EXPERIMENTS  

E-Print Network [OSTI]

for Machine protection Plasma control Physics evaluation The measurements of some parameters may contribute A E Costley, BPS Workshop II, General Atomics, 1 Ð 3 May 2001 Machine protection Need to protect, ie 'ionization front' position and/or Te and ne at the divertor plate. #12;ITER Page 7 A E Costley

386

BlobCR: Virtual disk based checkpoint-restart for HPC applications on IaaS clouds  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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.

387

Effect of composition changes on the structure and properties of W-Cr-Ni-C detonation gun coatings  

SciTech Connect (OSTI)

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

388

Stability of the L1{sub 2} phase at 800 C in the Ti-Al-Cr system  

SciTech Connect (OSTI)

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

389

Towards consistent chronology in the early Solar System: high resolution 53Mn-53Cr chronometry for chondrules.  

SciTech Connect (OSTI)

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

390

Fe-Cr-Mo based ODS alloys via spark plasma sintering: A combinational characterization study by TEM and APT  

SciTech Connect (OSTI)

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

391

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

392

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

SciTech Connect (OSTI)

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

393

Thermally activated dislocation creep model for primary water stress corrosion cracking of NiCrFe alloys  

SciTech Connect (OSTI)

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

394

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

395

LONG-TERM OPTICAL OBSERVATIONS OF TWO LMXBs: UW CrB (=MS 1603+260) AND V1408 Aql (=4U 1957+115)  

SciTech Connect (OSTI)

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

396

Band-Gap Reduction and Dopant Interaction in Epitaxial La,Cr Co-doped SrTiO3 Thin Films  

SciTech Connect (OSTI)

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

397

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

398

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.

399

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.

400

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.

Note: This page contains sample records for the topic "fp a-e cr" 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.


401

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

402

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

403

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

404

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

405

Breathers in Josephson junction ladders: Resonances and electromagnetic wave spectroscopy A. E. Miroshnichenko, S. Flach, and M. V. Fistul  

E-Print Network [OSTI]

Breathers in Josephson junction ladders: Resonances and electromagnetic wave spectroscopy A. E localized states discrete breathers and linear electromagnetic excitations EE's in Josephson junction lattices 6 , and localized resistive states in Josephson junction arrays 7­10 . The latter systems

Flach, Sergej

406

Audit calculations with CORCON-MOD 3 of the duration of superheat in NUREG/CR-5423  

SciTech Connect (OSTI)

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

407

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

408

Computer program for the sensitivity calculation of a CR-39 detector in a diffusion chamber for radon measurements  

SciTech Connect (OSTI)

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

409

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

410

Specification of CuCrZr Alloy Properties after Various Thermo-Mechanical Treatments and Design Allowables including Neutron Irradiation Effects  

SciTech Connect (OSTI)

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

411

Applicability of Loss of Offsite Power (LOSP) Events in NUREG/CR-6890 for Entergy Nuclear South (ENS) Plants LOSP Calculations  

SciTech Connect (OSTI)

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

412

Impact of Lattice Mismatch and Stoichiometry on the Structure and Bandgap of (Fe,Cr)2O3 Epitaxial Thin Films  

SciTech Connect (OSTI)

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

413

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.

414

Corrosion behavior in high heat input welded heat-affected zone of Ni-free high-nitrogen Fe18Cr10MnN austenitic stainless steel  

SciTech Connect (OSTI)

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

415

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

416

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

417

Absence of spin-flip transition at the Cr(001) surface: A combined spin-polarized scanning tunneling microscopy and neutron scattering study  

SciTech Connect (OSTI)

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

418

Methylene megration and coupling on a non-reducible metal oxide: the reaction of dichloromethane on stoichiometric -Cr2O3(0001)  

SciTech Connect (OSTI)

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

419

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

420

Constitutive Model for the Time-Dependent Mechanical Behavior of 430 Stainless Steel and FeCrAlY Foams in Sulfur-Bearing Environments  

SciTech Connect (OSTI)

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

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421

Reactions of Ethyl Groups on a Model Chromia Surface: Ethyl Chloride on Stoichiometric Alpha-Cr2O3(1012)  

SciTech Connect (OSTI)

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

422

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 (OSTI)

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

423

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

424

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

425

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

426

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

427

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

428

Incommensurate dynamics of resonant breathers in Josephson junction ladders M. V. Fistul, A. E. Miroshnichenko, and S. Flach  

E-Print Network [OSTI]

Incommensurate dynamics of resonant breathers in Josephson junction ladders M. V. Fistul, A. E and experimental studies of resonant localized resistive states in a Josephson junction ladder. These complex guides, in antiferromagnetic solids and in systems of interacting Josephson junctions.8­13 Especially

Flach, Sergej

429

Quasi-Monte Carlo simulation of the light environment of plants Mikolaj CieslakA,E,F  

E-Print Network [OSTI]

Quasi-Monte Carlo simulation of the light environment of plants Mikolaj CieslakA,E,F , Christiane-based CARIBU software (Chelle et al. 2004),and we showthat thesetwo programs produceconsistent results. Wealso assessed theperformance oftheRQMCpath tracing algorithm by comparing it with Monte Carlo path tracing

Prusinkiewicz, Przemyslaw

430

Microscope maps the graphene terrain A. E. Curtin, W. G. Cullen, M. S. Fuhrer, (Maryland MRSEC DMR 0520471)  

E-Print Network [OSTI]

Microscope maps the graphene terrain A. E. Curtin, W. G. Cullen, M. S. Fuhrer, (Maryland MRSEC DMR in the electrical potential on the surface of graphene on silicon carbide, shown here as different colors. KPM identifies single layer graphene (SLG), bilayer graphene (BLG), and two types of interfacial layer (IL1

Shapiro, Benjamin

431

Vacancy diffusion in the Cu001 surface I: an STM study R. van Gastel a,*, E. Somfai b,1  

E-Print Network [OSTI]

Vacancy diffusion in the Cuð001? surface I: an STM study R. van Gastel a,*, E. Somfai b,1 , S Abstract We have used the indium/copper surface alloy to study the dynamics of surface vacancies on the Cu, are used as probes to detect the rapid diffusion of surface vacancies. STM measurements show

van Saarloos, Wim

432

11554_cover_CR  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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:

433

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

434

UCRL-CR--10  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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)'

435

Manufacturing and properties of newly developed 9%CrMoVNiNbN high-pressure low-pressure rotor shaft forging  

SciTech Connect (OSTI)

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

436

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

437

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 (OSTI)

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

438

Investigation of the ultrasonic wave influence on magnetic ordering in a 20 x [Fe(20 A)/Cr(12 A)]/MgO layered structure  

SciTech Connect (OSTI)

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

439

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 (OSTI)

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

440

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 (OSTI)

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

Note: This page contains sample records for the topic "fp a-e cr" 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 Successful Synthesis of the CoCrFeNiAl{sub 0.3} Single-Crystal, High-Entropy Alloy by Bridgman Solidification  

SciTech Connect (OSTI)

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

442

Kondo effect in the paramagnetic phase of CrFe alloy with the spin-density-wave suppressed by pressure or V doping  

SciTech Connect (OSTI)

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

443

Spin dependent transport properties of Mn-Ga/MgO/Mn-Ga magnetic tunnel junctions with metal(Mg, Co, Cr) insertion layer  

SciTech Connect (OSTI)

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

444

Evaluation of 2.25Cr-1Mo Alloy for Containment of LiCl/KCl Eutectic during the Pyrometallurgical Processing of Used Nuclear Fuel  

SciTech Connect (OSTI)

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

445

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 (OSTI)

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

446

A review of "Montaigne and the Low Countries (1580 - 1700)" by Paul J. Smith and Karl A. E. Enenkel  

E-Print Network [OSTI]

silent for too long. Paul J. Smith and Karl A. E. Enenkel. Montaigne and the Low Countries (1580- 1700). Intersections 8. Leiden: Brill, 2007. xii + 372pp. $155.00. Review by ZAHI ZALLOUA, WHITMAN COLLEGE. This volume is the fruit of a conference... in Leiden that took place in September 2005. Taking as its subject matter the relation between Montaigne (1533-1592) and the Low Countries, each contribution addresses this ques- tion in its own way, though as Paul J. Smith points out in the Introduction...

Zalloua, Zahi

2008-01-01T23:59:59.000Z

447

Fe-24 wt.%Cr-4.1 wt.%C hardfacing alloy: Microstructure and carbide refinement mechanisms with ceria additive  

SciTech Connect (OSTI)

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

448

Effect of microstructural modification on tensile and fatigue properties of Cu-35wt%Ni-3. 5wt%Cr alloy  

SciTech Connect (OSTI)

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

449

Sr{sub 2}CrOsO{sub 6}: End point of a spin-polarized metal-insulator transition by 5d band filling  

SciTech Connect (OSTI)

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

450

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

451

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

452

Metal-Centered 17-Electron Radicals CpM(CO)3 (M = Cr, Mo, W): A Combined Negative Ion Photoelectron Spectroscopic and Theoretical Study  

SciTech Connect (OSTI)

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

453

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.

454

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.

455

Sc+.a,E-  

Office of Legacy Management (LM)

1981 Work perforrned as part of the REI,IEDIAL ACTION SURVEY AND CERTIFICATION ACTIVITIES OAK RIDGE NATIONAL LABORATORY Oak Ridge, Tennessee 37830 operated by UNION CARBIDE...

456

HP E4310A, E6000A, E6053A, E6058A, E6060A  

E-Print Network [OSTI]

International Standards Organi- zation members. ISO 9001 Certification Produced to ISO 9001 interna- tional

Park, Namkyoo

457

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 (OSTI)

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

458

Supplemental site inspection for Air Force Plant 59, Johnson City, New York, Volume 2: Appendices A-E  

SciTech Connect (OSTI)

This summary describes a Supplemental Site Inspection (SSI) conducted by Argonne National Laboratory (ANL) at Air Force Plant 59 (AFP 59) in Johnson City, New York. All required data pertaining to this project were entered by ANL into the Air Force-wide Installation Restoration Program Information System (IRPIMS) computer format and submitted to an appropriate authority. The work was sponsored by the United States Air Force as part of its Installation Restoration Program (IRP). Previous studies had revealed the presence of contaminants at the site and identified several potential contaminant sources. Argonne`s study was conducted to answer questions raised by earlier investigations. This volume consists of appendices A-E, containing field data and data validation.

Nashold, B.; Rosenblatt, D.; Tomasko, D. [and others

1995-08-01T23:59:59.000Z

459

Rapid crustal accretion and magma assimilation in the Oman-U.A.E. ophiolite: High precision U-Pb zircon geochronology of the gabbroic crust  

E-Print Network [OSTI]

New high-precision U/Pb zircon geochronology from the Oman-United Arab Emirates (U.A.E.) ophiolite provides insight into the timing and duration of magmatism and the tectonic setting during formation of the lower crust. ...

Rioux, Matthew

460

BlackSeaHazNet Scientific Report - EU FP7 IRSES project 2011-2014  

E-Print Network [OSTI]

The aims of the project 2011-2014) are in the project title- Complex Research of Earthquakes Forecasting Possibilities, Seismic and Climate Change Correlations- to create a team for researching the above mentioned problem. In the Project participated 76 scientists from 16 Institutes and 8 countries- Armenia, Bulgaria, Georgia, Greece, Macedonia, Slovenia, Turkey and Ukraine. The main results are shortly listed in the next. Creating a group which is able to fulfill a Complex Research of Earthquakes Forecasting Possibilities; The main result is statistical prove of imminent forecasting possibility for seismic regional activity on the basis of the geomagnetic monitoring in the framework of special created data acquisition system for earthquakes archiving, visualization and analysis (geomagnetic quake approach). Illustrated with the data from INTERMAGNET stations- PAG (Panagurichte, Bulgaria), SUA (Surlari, Romania), GCK (Grocka, Serbia) and LAquila (AQU, Italy) for the last 5-8 years; The application of the geom...

Mavrodiev, Strachimir Cht; Pekevski, Lazo; Kikuashvili, Giorgi

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "fp a-e cr" 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

Smart System Integration in FP7 Challenges and Options for Europe  

E-Print Network [OSTI]

& Training: · Lifelong learning · Modernising universities · Bologna process · Entrepreneurship Innovation · Knowledge & innovation for growth ­ Increase & improve investment in R&D ­ Facilitate innovation & uptake & Skills: Creating more & better jobs ­ Attract more people into employment & modernise social protection

Meju, Max

462

Call title: Energy Call Part 2 Call identifier: FP7-ENERGY-2010-2  

E-Print Network [OSTI]

ACTIVITY ENERGY.4: RENEWABLES FOR HEATING AND COOLING 15 ACTIVITY ENERGY.6: CLEAN COAL TECHNOLOGIES action) ACTIVITY ENERGY.6: CLEAN COAL TECHNOLOGIES AREA ENERGY.6.1: CONVERSION TECHNOLOGIES FOR ZERO

Milano-Bicocca, Università

463

2nd Annual Workshop Proceedings EC FP FIRST-Nuclides 5th  

E-Print Network [OSTI]

phases, (2) quantification of H2O2 and H2 produced by water radiolysis and (3) determination of the UO2 surface by H2O2 produced by water radiolysis. We have verified that studtite is not formed to the inhibition effect of H2 produced by water radiolysis. In these conditions, G(H2O2) and G(H2) are respectively

Paris-Sud XI, Université de

464

Full $fp$-shell study of even-even $^{48-56}$Ti isotopes  

E-Print Network [OSTI]

The level schemes and transition rates {\\em B}({\\em E}2;$\\uparrow$) of eve-even $^{48-56}$Ti isotopes were studied by performing large-scale shell model calculations with FPD6 and GXPF1 effective interactions. Excellent agreement were obtained by comparing the first 2$^{+}$ level for all isotopes with the recently available experimental data, but studying the transition strengths {\\em B}({\\em E}2; 0$^+_{g.s.} \\to2^+_1$) for all Ti isotopes using constant proton-neutron effective charges prove the limitations of the present large-scale calculations to reproduce the experiment in detail.

F. A. Majeed; A. A. Auda

2006-02-02T23:59:59.000Z

465

Using Variable Precision Rough Set Model to Build FP-Tree of Association Rules  

Science Journals Connector (OSTI)

The main mission of the variable precision rough set is to solve the problem of non- ... of association rules algorithms based on variable precision rough set model in e-commerce. The experiments show...

SuJuan Qian; ZhiQiang Zhang

2012-01-01T23:59:59.000Z

466

(Vg = 2 volts, Fp = 3,7 volts). Dans le circuit  

E-Print Network [OSTI]

the process is incom- plete. But since it is advantageous to have thermionic convertors workingat temperatures and the latter was used simultaneously for the ionization process. In general, when the energy to be converted

Paris-Sud XI, Université de

467

SMP SPEC CPU95 FP OSCAR 16 IBM RegattaH MGRID 10.6 8  

E-Print Network [OSTI]

.5 times speedup for HYDRO2D on 8 processor IBM RS6000 604e High Node against sequential processing and 6 Conditional Branch 1 2 3 4 5 6 7 8 9 10 11 12 13 14 (b) Macro Task Graph (MTG)(a) Macro Flow Graph (MFG) 2: 2.2 2 a MFG 2 a 2 b MTG AND OR 2.3 MTG 13) OSCAR 2 #12;1 2 3 4 56 7 (a) befor loop decomposition 1 2 45

Kasahara, Hironori

468

Empirical effective interactions in the lower fp shell and upper sd shell  

Science Journals Connector (OSTI)

Average values of matrix elements of the effective nucleon-nucleon interaction can be extracted from measured binding energies and spectra using a variety of simple techniques. Such techniques are applied to data in the mass range A=2864 to yield information about the interaction energy of nucleons occupying the 2s1/2, 1d3/2, 1f7/2, and 2p3/2 shell-model orbits. The resulting interaction centroids are compared with values provided by other methods, such as shell-model fits to experimental energy levels, calculation of the G matrix from free nucleon-nucleon potentials, and extraction of interaction matrix elements directly from the spectra of nuclei with two nucleons relative to a closed shell. The empirical centroids are shown to be surprisingly accurate.

B. J. Cole

1991-07-01T23:59:59.000Z

469

SFSSi.pib-flue Sm ums. f..h.IS FP13-14:30  

E-Print Network [OSTI]

-coprime- factorization (RCF) and (Dp, Np) denotes a left- coprime-factorisation (LCF) of P E JRp(s)noxnt, where Np, Dp map ? :Lna Lng is W to bC-stable iff there exists a continuou nondecreasing 4 : IR+ -_ IR+ 'Research-stability. Note that an Ru-stable LTI map is C-stable; however, the converse is not true in general. System

Gundes, A. N.

470

Nuclear Fission Reactor Safety Research in FP7 and future perspectives  

E-Print Network [OSTI]

The European Union (?U) has defined in the Europe 2020 strategy and 2050 Energy Roadmap its long-term vision for establishing a secure, sustainable and competitive energy system and setting up legally binding targets by 2020 for reducing greenhouse emissions, by increasing energy efficiency and the share of renewable energy sources while including a significant share from nuclear fission. Nuclear energy can enable the further reduction in harmful emissions and can contribute to the EUs competitive energy system, security of supply and independence from fossil fuels. Nuclear fission is a valuable option for those 14 EU countries that promote its use as part of their national energy mix. The European Group on Ethics in Science and New Technologies (EGE) adopted its Opinion No.27 An ethical framework for assessing research, production and use of energy and proposed an integrated ethics approach for the research, production and use of energy in the EU, seeking equilibrium among four criteria access ...

Garbil, Roger

2014-01-01T23:59:59.000Z

471

Nuclear transparency and effective kaon-nucleon cross section from the A(e, e'K+) reaction  

E-Print Network [OSTI]

We have determined the transparency of the nuclear medium to kaons from $A(e,e^{'} K^{+})$ measurements on $^{12}$C, $^{63}$Cu, and $^{197}$Au targets. The measurements were performed at the Jefferson Laboratory and span a range in four-momentum-transfer squared Q$^2$=1.1 -- 3.0 GeV$^2$. The nuclear transparency was defined as the ratio of measured kaon electroproduction cross sections with respect to deuterium, ($\\sigma^{A}/\\sigma^{D}$). We further extracted the atomic number ($A$) dependence of the transparency as parametrized by $T= (A/2)^{\\alpha-1}$ and, within a simple model assumption, the in-medium effective kaon-nucleon cross sections. The effective cross sections extracted from the electroproduction data are found to be smaller than the free cross sections determined from kaon-nucleon scattering experiments, and the parameter $\\alpha$ was found to be significantly larger than those obtained from kaon-nucleus scattering. We have included similar comparisons between pion- and proton-nucleon effective cross sections as determined from electron scattering experiments, and pion-nucleus and proton-nucleus scattering data.

Nuruzzaman; D. Dutta; J. Arrington; R. Asaturyan; F. Benmokhtar; W. Boeglin; P. Bosted; A. Bruell; B. Clasie; M. E. Christy; E. Chudakov; M. M. Dalton; A. Daniel; D. Day; L. El Fassi; R. Ent; H. C. Fenker; J. Ferrer; N. Fomin; H. Gao; K. Garrow; D. Gaskel; C. Gray; T. Horn; G. M. Huber; M. K. Jones; N. Kalantarians; C. E. Keppel; K. Kramer; Y. Li; Y. Liang; A. F. Lung; S. Malace; P. Markowitz; A. Matsumura; D. G. Meekins; T. Mertens; T. Miyoshi; H. Mkrtchyan; R. Monson; T. Navasardyan; G. Niculescu; I. Niculescu; Y. Okayasu; A. K. Opper; C. Perdrisat; V. Punjabi; X. Qian; A. W. Rauf; V. M. Rodriquez; D. Rohe; J. Seely; E. Segbefia; G. R. Smith; M. Sumihama; V. Tadevosyan; L. Tang; V. Tvaskis; W. F. Vulcan; F. R. Wesselmann; S. A. Wood; L. Yuan; X. C. Zheng

2011-08-02T23:59:59.000Z

472

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

473

Tensile properties and strain rate sensitivity of Ti-47Al-2Cr-0.2Si sheet material with different microstructures  

SciTech Connect (OSTI)

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

474

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

475

Magnetism, half-metallicity and electrical transport properties of V- and Cr-doped semiconductor SnTe: A theoretical study  

SciTech Connect (OSTI)

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

476

Elevated-Temperature Corrosion of CoCrCuFeNiAl0.5Bx High-Entropy Alloys in Simulated Syngas Containing H2S  

SciTech Connect (OSTI)

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

477

Experimental and theoretical analysis of a nondispersive solvent extraction pilot plant for the removal of Cr(VI) from a galvanic process wastewaters  

SciTech Connect (OSTI)

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

478

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

479

Dynamics of cementation in response to oil charge: Evidence from a Cretaceous carbonate field, U.A.E.  

Science Journals Connector (OSTI)

Oil charge is thought to inhibit the growth of cements within subsurface pore systems. We explore this phenomenon in a giant Cretaceous carbonate field from U.A.E., where the oil-filled crest porosity ranges from 10 to 50% and permeability from 0.08 to 830mD but coeval water leg porosity is reduced to 10 to 23% and permeability to 0.1 to 4 mD. Only 5% of primary interparticle pores (>30?m diameter) in the crest are fully cemented, compared to 99% of pores in the water leg. Syntaxial calcite burial cements (>10?m diameter) in the oil leg show 12 cathodoluminescence zones with oil inclusions (n=27) occurring in four of the five final zones. Mean in-situ ion microprobe ?18OVPDB data from the oil leg cements range from ?1.2 in the oldest zone decreasing to ?10.3 in zone 11, returning to ?7.7 in the final zone. The oldest distinguishable cement zone in the water leg shows highly variable ?18O from ?3.6 to ?9.3 with a mean of ?7.3, and with subsequent zones decreasing to a mean value of ?9.4 for the youngest cement zone. Decreasing ?18O values are interpreted as indicating increasing temperature reflecting burial and the evolution of pore water composition: broadly similar trends in the oil and water legs suggest precipitation under the same general conditions. Unlike the oil leg cements, the final zone in the water leg occludes nearly all remaining pore space. The ?18OVPDB of bulk micrite from the water leg shows an average of ?7.4 (n=9) compared to ?6.2 (n=10) from the oil leg, suggesting the precipitation of further micrite cement at greater burial depths. We infer that burial cementation slowed in the presence of oil due to a reduction of potential nucleation sites as well as porewater and solute movement within weakly oil-wet pores, whereas continued flow and solute movement through all pores including the micropores (<10?m diameter) enabled extensive cementation in the water leg.

P.A. Cox; R.A. Wood; J.A.D. Dickson; H.B. Al Rougha; H. Shebl; P.W.M. Corbett

2010-01-01T23:59:59.000Z

480

Modeling the effect of irradiation and post-irradiation annealing on grain boundary composition in austenitic Fe-Cr-Ni alloys.  

SciTech Connect (OSTI)

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

Note: This page contains sample records for the topic "fp a-e cr" 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

Comparison of the effects of long-term thermal aging and HFIR irradiation on the microstructural evolution of 9Cr-1MoVNb steel  

SciTech Connect (OSTI)

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

482

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 (OSTI)

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

483

A picosecond electron gun for surface analysis M. Aeschlimann,a) E. Hull, J. Cao,b) C. A. Schmuttenmaer, L. G. Jahn,@ Y. Gao,b)  

E-Print Network [OSTI]

A picosecond electron gun for surface analysis M. Aeschlimann,a) E. Hull, J. Cao,b) C. A investigations for a new design of an ultrashort pulsed laser activated electron gun for time resolved surface gun, in spite of an unusually long focal length and a small convergence angle of the pulsed electron

Cao, Jianming

484

Strontium oxide segregation at SrLaAlO4 surfaces A.E. Becerra-Toledo , L.D. Marks  

E-Print Network [OSTI]

Strontium oxide segregation at SrLaAlO4 surfaces A.E. Becerra-Toledo , L.D. Marks Northwestern surfaces We report observable segregation of strontium oxide at the surface of strontium lanthanum-dispersive X-ray spectroscopy showed that Sr and O segregation occurs on strontium lanthanum aluminate surfaces

Marks, Laurence D.

485

GFD-2 Spring 2004 Syllabus Text: a nearly complete set of text handouts, plus A.E.Gill, Atmosphere-Ocean Dynamics  

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geography of potential vorticity -lateral circulation: wind-driven ocean gyres and boundary currents -circumpolar ocean currents and the atmospheric westerly winds: stationary Rossby waves with mountains; waveGFD-2 Spring 2004 Syllabus Text: a nearly complete set of text handouts, plus A.E.Gill, Atmosphere-Ocean

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Plant Cell Reports (1999) 19:612 Q Springer-Verlag 1999 T. Ponappa 7 A.E. Brzozowski 7 J.J. Finer  

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by J.M. Widholm T. Ponappa 7 A.E. Brzozowski 7 J.J. Finer (Y) Department of Horticulture and Crop. All of the constructions produced green fluorescence in soybean cultures upon blue light excita- tion is a 238-amino-acid protein that produces green fluo- rescence upon excitation by UV or blue light (Cubitt

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487

A Simple Path Loss Prediction Model for HVAC Systems O. K. Tonguz, D. D. Stancil, A. E. Xhafa, A. G. Cepni, P. V. Nikitin  

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1 A Simple Path Loss Prediction Model for HVAC Systems O. K. Tonguz, D. D. Stancil, A. E. Xhafa, A, and air conditioning (HVAC) cylindrical ducts in 2.4-2.5 GHz frequency band. The model we propose predicts the average power loss between a transmitter-receiver pair in an HVAC duct network. This prediction model

Stancil, Daniel D.

488

C A L I F O R N I A E N E R G Y C O M M I S S I O N Staff Webinar  

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Temperature Measurement Access Holes (TMAH) Residential Energy Efficiency Standards 3 Typical "Pancake Unite: Alternative for Temperature Measurement Access Holes David W. Ware California Energy Commission November 15, 2012 1Residential Energy Efficiency Standards #12;C A L I F O R N I A E N E R G Y C O M M I S S I O N

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Water adsorption on SrTiO3(001): II. Water, water, everywhere A.E. Becerra-Toledo a,  

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Water adsorption on SrTiO3(001): II. Water, water, everywhere A.E. Becerra-Toledo a, , J January 2012 Available online 17 January 2012 Keywords: Strontium titanate Density functional theory Water adsorption Surface reconstruction X-ray photoelectron spectroscopy Oxide surfaces The role of water

Marks, Laurence D.

490

Version 12 Nov 2012 Semester 1 Cr Semester2 Cr  

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and GPS 4 SFR 215 - Introduction to Bioproducts & Bioenergy 3 ECO 121 - Principles of Macroeconomics 3 SFR related to FBB;