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Note: This page contains sample records for the topic "ni ti al" 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.


1

Grain Refinement in TiC-Ni3Al Composites  

DOE Green Energy (OSTI)

The Cooperative Research and Development Agreement (CRADA) was to develop composites of TiC-Ni{sub 3}Al with refined grain microstructures for application in diesel engine fuel injection devices. Grain refinement is important for improved wear resistance and high strength for the applications of interest. Attrition milling effectively reduces the initial particle size and leads to a reduction of the final grain size. However, an increase in the oxygen content occurs concomitantly with the grinding operation and decreased densification of the compacts occurs during sintering.

Tiegs, T.N.

2001-01-30T23:59:59.000Z

2

INVESTIGATION OF NOVEL ALLOY TiC-Ni-Ni3Al FOR SOLID OXIDE FUEL CELL INTERCONNECT APPLICATIONS  

DOE Green Energy (OSTI)

Solid oxide fuel cell interconnect materials must meet stringent requirements. Such interconnects must operate at temperatures approaching 800 C while resisting oxidation and reduction, which can occur from the anode and cathode materials and the operating environment. They also must retain their electrical conductivity under these conditions and possess compatible coefficients of thermal expansion as the anode and cathode. Results are presented in this report for fuel cell interconnect candidate materials currently under investigation based upon nano-size titanium carbide (TiC) powders. The TiC is liquid phase sintered with either nickel (Ni) or nickel-aluminide (Ni{sub 3}Al) in varying concentrations. The oxidation resistance of the submicron grain TiC-metal materials is presented as a function weight change versus time at 700 C and 800 C for varying content of metal/intermetallic in the system. Electrical conductivity at 800 C as a function of time is also presented for TiC-Ni to demonstrate the vitality of these materials for interconnect applications. TGA studies showed that the weight gain was 0.8 mg/cm{sup 2} for TiC(30)-Ni(30wt.%) after 100 hours in wet air at 800 C and the weight gain was calculated to be 0.5205 mg/cm{sup 2} for TiC(30)- Ni(10 wt.%) after 100 hours at 700 C and 100 hours at 800 C. At room temperature the electrical conductivity was measured to be 2444 1/[ohm.cm] for TiC-Ni compositions. The electrical conductivities at 800 C in air was recorded to be 19 1/[ohm.cm] after 125 hours. Two identical samples were supplied to PNNL (Dr. Jeff Stevenson) for ASR testing during the pre-decision period and currently they are being tested there. Fabrication, oxidation resistance and electrical conductivity studies indicate that TiC-Ni-Ni{sub 3}Al ternary appears to be a very important system for the development of interconnect composition for solid oxide fuel cells.

Rasit Koc; Geoffrey Swift; Hua Xie

2005-01-25T23:59:59.000Z

3

Comparison of dc performance of Pt/Ti/Au- and Ni/Au-Gated AlGaN/GaN High Electron Mobility Transistors  

Science Conference Proceedings (OSTI)

We have demonstrated significant improvements of AlGaN/GaN High Electron Mobility Transistors (HEMTs) dc performance by employing Pt/Ti/Au instead of the conventional Ni/Au gate metallization. During off-state bias stressing, the typical critical voltage for HEMTs with Ni/Au gate metallization was ~ -45 to -65V. By sharp contrast, no critical voltage was observed for HEMTs with Pt/Ti/Au gate metallization, even up to -100V, which was the instrumental limitation in this experiment. After the off-state stressing, the drain current of Ni/Au gated-HEMTs decreased by~ 15%. For the Pt-gate HEMTs, no degradation of the drain current occurred and there were minimal changes in the Schottky gate characteristics for both forward and reverse bias conditions. The HEMTs with Pt/Ti/Au metallization showed an excellent drain on/off current ratio of 1.5 108. The on/off drain current ratio of Ni-gated HEMTs was dependent on the drain bias voltage and ranged from 1.2 107 at Vds=5V and 6 105

Liu, L. [University of Florida, Gainesville; Lo, C. F. [University of Florida; Kang, Tsung Sheng [University of Florida, Gainesville; Pearton, S. J. [University of Florida; Kravchenko, Ivan I [ORNL; Laboutin, O. [Kopin Corporation, Taunton, MA; Johnson, Wayne J. [Kopin Corporation, Taunton, MA; Ren, F. [University of Florida

2011-01-01T23:59:59.000Z

4

Step-Wise Exothermic Reactions in Cold-Rolled Ni/Al, Ti/Al, and Ta ...  

Science Conference Proceedings (OSTI)

Aerosol Route Synthesis of Copper Oxide Nanoparticles Using Copper Nitrate Solution · AlGaAs-Based Optical ... Defect Energetics and Fission Product Transport in ZrC ... Enhancing Mineral Beneficiation by High Intensity Power Ultrasound.

5

the effect of nb, ti, al on precipitation and strengthening behavior of ...  

Science Conference Proceedings (OSTI)

high temperature industries. However, the ceiling temperature for Alloy 718 is 650 because of. ? the instability of main strengthening phase ??-Ni3(Nb,Ti,Al).

6

Phase Field Simulation of Ni4Ti3 Precipitation in Porous NiTi Shape ...  

Science Conference Proceedings (OSTI)

Generally, porous NiTi alloys may undergo thermomechnical treatment which .... of First Derivative of Dilatation in Low Carbon Steels Multi-Phase Presenting.

7

Gamma TiAl Alloys 2014  

Science Conference Proceedings (OSTI)

Jul 15, 2013... for selective laser melting – from single track to fully dense specimens ... Rolling and Grinding of Thin Sheets of Beta-Solidified Gamma TiAl ...

8

Structure and Electrochemistry of LiNi1/3Co1/3-yMyMn1/3O2 (M=Ti, Al, Fe) Positive Electrode Materials  

SciTech Connect

A series of materials based on the LiNi1/3Co1/3-yMyMn1/3O2 (M = Ti,Al,Fe) system has been synthesized and examined structurally and electrochemically. It is found that the changes in electrochemical performance depend highly on the nature of the substituting atom and its effect on the crystal structure. Substitution with small amounts of Ti4+ (y = 1/12) leads to the formation of a high-capacity and high-rate positive electrode material. Iron substituted materials suffer from an increased antisite defect concentration and exhibit lower capacities and poor rate capabilities. Single-phase materials are found for LiNi1/3Co1/3-yAlyMn1/3O2 when y<_ 1/4 and all exhibit decreased capacities when cycled to 4.3 V. However, an increase in rate performance and cycle stability upon aluminum substitution is correlated with an improved lamellar structure.

Wilcox, James; Patoux, Sebastien; Doeff, Marca

2009-01-14T23:59:59.000Z

9

Stress-induced martensitic transformations in NiTi and NiTi-TiC composites investigated by neutron diffraction  

SciTech Connect

Superelastic NiTi (51.0 at% Ni) with 0, 10 and 20 vol% TiC particles were deformed under uniaxial compression as neutron diffraction spectra were simultaneously obtained. The experiments yielded in-situ measurements of the thermoelastic stress-induced transformation. A detailed Rietveld determination is made of the phase fractions and the evolving strains in the reinforcing TiC particles and the austenite as it transforms to martensite on loading (and its subsequent back transformation on unloading). These strains are used to shed light on the phenomenon of load transfer in composites where the matrix undergoes a stress-induced phase transformation.

Vaidyanathan, R. [Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Materials Science and Engineering; Bourke, M.A.M. [Los Alamos National Lab., NM (United States); Dunand, D.C. [Northwestern Univ., Evanston, IL (United States)

1998-12-31T23:59:59.000Z

10

Lessons Learned in Sputtering TiNi Thin Film  

Science Conference Proceedings (OSTI)

Experimental results have been published in journals and conference proceedings, but as yet TiNi thin film is not commercially available. The author and ...

11

Improvement of thermoelectric properties for half-Heusler TiNiSn by interstitial Ni defects  

SciTech Connect

We have synthesized off-stoichiometric Ti-Ni-Sn half-Heusler thermoelectrics in order to investigate the relation between randomly distributed defects and thermoelectric properties. A small change in the composition of Ti-Ni-Sn causes a remarkable change in the thermal conductivity. An excess content of Ni realizes a low thermal conductivity of 2.93 W/mK at room temperature while keeping a high power factor. The low thermal conductivity originates in the defects generated by an excess content of Ni. To investigate the detailed defect structure, we have performed first-principles calculations and compared with x ray photoemission spectroscopy measurement. Based on these analyses, we conclude that the excess Ni atoms randomly occupy the vacant sites in the half-Heusler structure, which play as phonon scattering centers, resulting in significant improvement of the figure of merit without any substitutions of expensive heavy elements, such as Zr and Hf.

Hazama, Hirofumi; Matsubara, Masato; Asahi, Ryoji [Toyota Central R and D Labs., Inc., Nagakute, Aichi 480-1192 (Japan); Takeuchi, Tsunehiro [Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603 (Japan)

2011-09-15T23:59:59.000Z

12

Synthesis of Ni-Al Intermetallic Nanoparticle Catalysts by Vacuum ...  

Science Conference Proceedings (OSTI)

... methanol decomposition and methane steam reforming, indicating a possibility to develop Ni-Al intermetallic compounds as catalysts for hydrogen production.

13

Catalytic Properties of Ni-Al Intermetallic Nanoparticle Catalysts for ...  

Science Conference Proceedings (OSTI)

In order to pursue high catalytic performance of Ni-Al intermetallic ... very high catalytic activity for methanol decomposition and methane steam reforming.

14

Formation of a Novel Ordered Ni3Al Surface Structure by Codeposition on NiAl(110)  

SciTech Connect

The formation of a new type of ordered 2D Ni3Al overlayer by low-temperature codeposition on NiAl(110) is demonstrated by kinetic Monte Carlo simulation of a multisite atomistic lattice-gas model with a precise treatment of surface diffusion kinetics. Simultaneous codeposition with 3?1 Ni?Al yields poor ordering at 300 K but well-ordered structures by ?500??K. Sequential codeposition of Ni then Al yields unmixed core-ring nanostructures at 300 K but strong intermixing and ordering by ?500??K.

Han, Yong; Unal, Baris; Evans, James W.

2012-05-23T23:59:59.000Z

15

Mechanochemical synthesis and rapid consolidation of nanocrystalline 3NiAl-Al2O3 composites  

Science Conference Proceedings (OSTI)

Nanopowders of 3NiAl and Al2O3 were synthesized from 3NiO and 5Al powders by high-energy ball milling. Nanocrystalline Al2O3 reinforced composite was consolidated by high-frequency induction-heated sintering ...

In-Jin Shon; In-Yong Ko; Seung-Hoon Jo; Jung-Mann Doh; Jin-Kook Yoon; Sang-Whan Park

2011-01-01T23:59:59.000Z

16

Lanthanide Al-Ni base Ericsson cycle magnetic refrigerants  

DOE Patents (OSTI)

A magnetic refrigerant for a magnetic refrigerator using the Ericsson thermodynamic cycle comprises DyAlNi and (Gd{sub 0.54}Er{sub 0.46})AlNi alloys having a relatively constant {Delta}Tmc over a wide temperature range. 16 figs.

Gschneidner, K.A. Jr.; Takeya, Hiroyuki

1995-10-31T23:59:59.000Z

17

Lanthanide Al-Ni base Ericsson cycle magnetic refrigerants  

DOE Patents (OSTI)

A magnetic refrigerant for a magnetic refrigerator using the Ericsson thermodynamic cycle comprises DyAlNi and (Gd.sub.0.54 Er.sub.0.46)AlNi alloys having a relatively constant .DELTA.Tmc over a wide temperature range.

Gschneidner, Jr., Karl A. (Ames, IA); Takeya, Hiroyuki (Ibaraki, JP)

1995-10-31T23:59:59.000Z

18

Emerging Robust Beta Gamma TiAl Alloys  

Science Conference Proceedings (OSTI)

Recently a new class of TiAl based alloy system, called beta gamma, that ... Phase-Field Simulation on Phase Transformation during Creep Deformation in Type ...

19

Formation of a Novel Ordered Ni3Al Surface Structure by Codeposition on NiAl(110)  

E-Print Network (OSTI)

The formation of a new type of ordered 2D Ni3Al overlayer by low-temperature codeposition on NiAl(110) is demonstrated by kinetic Monte Carlo simulation of a multisite atomistic lattice-gas model with a precise treatment ...

Han, Yong

20

Fabrication and thermoelectric properties of fine-grained TiNiSn compounds  

Science Conference Proceedings (OSTI)

Nearly single-phased TiNiSn half-Heusler compound thermoelectric materials were synthesized by combining mechanical alloying (MA) and spark plasma sintering (SPS) in order to reduce its thermal conductivity by refining the grain sizes. Although TiNiSn compound powders were not synthesized directly via MA, dense bulk samples of TiNiSn compound were obtained by the subsequent SPS treatment. It was found that an excessive Ti addition relative to the TiNiSn stoichiometry is effective in increasing the phase purity of TiNiSn half-Heusler phase in the bulk samples, by compensating for the Ti loss caused by the oxidation of Ti powders and MA processing. The maximum power factor value obtained in the Ti-compensated sample is 1720 muW m{sup -1} K{sup -2} at 685 K. A relatively high ZT value of 0.32 is achieved at 785 K for the present undoped TiNiSn compound polycrystals. - Graphical abstract: Nearly single-phased TiNiSn-based half-Heusler compound polycrystalline materials with fine grains were fabricated by combining mechanical alloying (MA) and spark plasma sintering (SPS). A high ZT value for undoped TiNiSn was obtained because of the reduced thermal conductivity.

Zou Minmin [State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084 (China); Li Jingfeng, E-mail: jingfeng@mail.tsinghua.edu.c [State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084 (China); Du Bing; Liu Dawei [State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084 (China); Kita, Takuji [Advanced Material Engineering Division, Vehicle Engineering Group, Higashifuji Technical Center, Toyota Motor Corporation, 1200, Mishuku, Susono, Shizuoka 410-1193 (Japan)

2009-11-15T23:59:59.000Z

Note: This page contains sample records for the topic "ni ti al" 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

Tribological behavior of NiTi alloy against 52100 steel and WC at elevated temperatures  

SciTech Connect

The dry tribological behavior of a Ti-50.3 at.% Ni alloy at temperatures of 25 deg. C, 50 deg. C and 200 deg. C was studied. The wear tests were performed on a high temperature pin-on-disk tribometer using 52100 steel and tungsten carbide pins. The worn surfaces of the NiTi alloy were examined by scanning electron microscope. The results showed that in the wear tests involving steel pins, the wear rate of the NiTi decreased as the wear testing temperature was increased. However, for the NiTi/WC contact, a reverse trend was observed. There was also a large decrease in the coefficient of friction for the NiTi/steel contact with increasing wear testing temperature. The formation of compact tribological layers could be the main reason for the reduction of the wear rate and coefficient of friction of the NiTi/steel contact at higher wear testing temperatures.

Abedini, M. [School of Metallurgy and Materials Engineering, University of Tehran, Tehran (Iran, Islamic Republic of); Ghasemi, H.M., E-mail: hghasemi@ut.ac.ir [School of Metallurgy and Materials Engineering, University of Tehran, Tehran (Iran, Islamic Republic of); Ahmadabadi, M. Nili [School of Metallurgy and Materials Engineering, University of Tehran, Tehran (Iran, Islamic Republic of)

2010-07-15T23:59:59.000Z

22

Effect of Aging Heat Treatments on Ni52Ti48 Shape Memory Alloy  

E-Print Network (OSTI)

Ni-rich NiTi shape memory alloys (SMAs) are capable of attaining a wide range of transformation temperatures depending on the heat treatment conditions and superior thermo-mechanical cycling stability, which are desired for repeated solid-state actuation. High Ni-content Ni-rich SMAs have very low transformation temperatures in a solutionized condition due to the high Ni-content of the matrix. Slow cooling (furnacecooling) from solutionizing temperature and additional aging heat treatments result in the formation of Ni-rich precipitates such as Ni4Ti3, Ni3Ti2 and Ni3Ti and increase transformation temperatures above ambient by depleting excess Ni from the matrix. However, the precipitates do not undergo a martensitic phase transformation and they decrease the transformation strain by reducing the volume fraction of the material capable of transforming. Meanwhile, recent preliminary work shows that Ni3Ti precipitates dominate fatigue failure. The objectives of the present study are: (1) to eliminate Ni3Ti but still have Ni4Ti3 precipitates, which are responsible for the dimensional stability and increase transformation temperatures, (2) to investigate the effect of heat treatments on the transformation strain, and (3) to select single variant Ni4Ti3 precipitates through constrained aging for the formation of oriented internal stress and eventually obtain twoway shame memory effect (TWSME) and enhanced dimensional stability. Based on these objectives, the effect of aging heat treatment on transformation temperatures, microstructural evolution, and shape memory behavior were investigated for a Ni52Ti48 shape memory alloy (SMA) by using differential scanning calorimetry (DSC), optical microscopy, scanning electron microscopy (SEM), and thermo-mechanical testing, including isobaric heating-cooling experiments under various stress levels. It was observed that solutionizing at 900 degree C for 24 hours eliminated Ni3Ti type precipitates, but additional aging heat treatments are needed to form Ni4Ti3 precipitates to increase transformation temperatures. Furnace-cooling and additional aging heat treatment results in the multi-stage martensitic transformation due to chemical and stress inhomogeneities in the microstructure. Aging of the controlled furnace-cooled material at 400 degree C for 48 hours resulted in the highest transformation temperatures among all processing conditions investigated due to the combination of Ni3Ti precipitates and 27 percent volume fraction of the Ni4Ti3 precipitates, which led to the depletion of Ni from the transforming matrix. However, since overaging results in losing coherency of the precipitates, dimensional stability during isobaric thermal cycling was negatively impacted.

Akin, Erhan

2010-08-01T23:59:59.000Z

23

Shape Memory Response of NiTiHfPd High Strength and High ...  

Science Conference Proceedings (OSTI)

In this study, shape memory and superelastic properties of NiTiHfPd polycrystalline and single crystalline SMAs as functions of aging temperature and time were ...

24

Further Characterization of New NiTi Wire and Rotary Endodontic ...  

Science Conference Proceedings (OSTI)

Presentation Title, Further Characterization of New NiTi Wire and Rotary ... Higher-resolution transmission electron microscopy examination of M-Wire used to ...

25

Reduction of the Ni- and Ti-oxide mixtures by natural gas  

Science Conference Proceedings (OSTI)

In this work, the reduction of Ni- and Ti-oxides by natural gas has been studied. ... Reaction mechanism and reaction rate of Sn evaporation from liquid steel.

26

The influence of FeTi and NiTi intermetallide additions on high-temperature oxidation of permalloy alloy  

Science Conference Proceedings (OSTI)

As a rule powder metallurgy Permalloy alloys are used in production of parts for electronic instruments. For the purpose of controlling the magnetic and electrical properties and also the wear (in the case of production of magnetic heads) and corrosion resistance appropriate additions of metals or such compounds as carbides and oxides are added to the alloy. In this work use of FeTi and NiTi intermetallides produced by reaction sintering of powders of pure metals in a protective atmosphere as alloying additions to Permalloy is recommended. The size of the original powders is less than 100 {mu}m. For reaction sintering at temperature 50{degrees}C above the eutectic temperature in the Ti-TiFe and TiNi-Ni systems was selected. The contents of titanium, iron, and oxygen in the FeTi alloy is 51.9, 45.7, and 2.4 wt.%, respectively, and of titanium, nickel, and oxygen in the NiTi alloy 59.6, 31.9, and 4.6 wt.%. High-temperature oxidation in air up to 1300{degrees}C with a rate of change in temperature of 15{degrees}C of type 78N Permalloy with additions of FeTi and NiTi alloys was investigated with use of methods of differential thermal and differential thermogravimetric analyses on an OD-103 derivatograph under nonisothermal conditions. The reaction products were studied by x-ray diffraction phase analysis on a DRON-3 instrument in CoK{sub {alpha}}-radiation. Pure 78N alloy powder with a composition of 78.1% Ni + 19.3% Fe (specimen 1) and also with additions of 1% FeTi (specimen 2) and 1% NiTi (specimen 3) were subjected to oxidation.

Klimenko, V.N.; Lavrenko, V.A.; Panasyuk, O.A.; Blasova, O.V.; Protsenko, T.G. [Inst. of Materials Science, Kiev (Ukraine)

1995-11-01T23:59:59.000Z

27

Molecular Dynamics Simulation of Reactions Forming Ni-Al ...  

Science Conference Proceedings (OSTI)

Abstract Scope, Alloying reactions of a Ni-coated Al nanoparticle, Al-coated ... Atomistic Modeling of Screw Dislocation Mobility in Alpha-Fe ... Mesoscale Polycrystal Calculations of Damage Histories in Shock Loaded Metals ... Multi- time Scale Modeling of the Annealing of Radiation-Induced Defects at Tilt Grain Boundaries.

28

Composite Ti-6Al-4V + Hydroxyapatite Biomedical Implant Materials ...  

Science Conference Proceedings (OSTI)

Together the augmented diffusion mode and accelerated application of thermal energy allow co-sintering of Ti-6Al-4V + HA below 1000°C to be realized, thus ...

29

Ni 2 Al(?´) - Programmaster.org  

Science Conference Proceedings (OSTI)

The selective etching of ? phase was conducted by electrochemical ... Storage of CO2 in Low Al2O3 EAF Oxidizing Slag by Grinding with Vibration Mill.

30

Hydrogen Permeability of Mulitphase V-Ti-Ni Metallic Membranes  

DOE Green Energy (OSTI)

Development of advanced hydrogen separation membranes in support of hydrogen production processes such as coal gasification and as front end gas purifiers for fuel cell based system is paramount to the successful implementation of a national hydrogen economy. Current generation metallic hydrogen separation membranes are based on Pd-alloys. Although the technology has proven successful, at issue is the high cost of palladium. Evaluation of non-noble metal based dense metallic separation membranes is currently receiving national and international attention. The focal point of the reported work was to evaluate a Group 5A-Ta, Nb, V-based alloy with respect to microstructural features and hydrogen permeability. Electrochemical hydrogen permeation testing of the V-Ti-Ni alloy is reported herein and compared to pure Pd measurements recorded as part of this same study. The V-Ti-Ni was demonstrated to have a steady state hydrogen permeation rate an order of magnitude higher than the pure Pd material in testing conducted at 22 C.

Adams, T. M.; Mickalonis, J.

2005-10-18T23:59:59.000Z

31

Effect of Aging on Mechanical Properties of Ti-Mo-Al Biomedical ...  

Science Conference Proceedings (OSTI)

For the case of Ti-Ni, cold work and aging at intermediate temperatures are utilized to improve shape memory effect through hardening. Therefore, in this work, ...

32

Compton Profile Study of Intermetallic Ti{sub 3}Al  

SciTech Connect

The Compton scattering measurement on intermetallic alloy Ti{sub 3}Al is reported in this work. The measurement is made using 59.54 keV gamma-rays from Am{sup 241} source. Theoretical calculation of Compton profile is also performed employing CRYSTAL code within the framework of density functional theory to compare with the measurement. The theoretical profile of the alloy is also synthesized following the superposition model taking the published Compton profiles of elemental solids from the APW method. The experimental study of charge transfer in the alloys has also been done by performing the experimental Compton profile measurements on Ti and Al following the superposition model and charge transfer from Al to Ti is clearly seen on the alloy formation.

Vyas, V.; Sharma, G. [Department of Physics, Banasthali University, Banasthali-304022 (India); Mishra, M. C.; Sharma, B. K. [Department of Physics, University of Rajasthan, Jaipur-302004 (India); Joshi, K. B. [Department of Physics, University College of Science, M.L.Sukhadia University, Udaipur-313 002 (India)

2011-10-20T23:59:59.000Z

33

First-principles investigations of Ni3Al(111) and NiAl(110) surfaces at metal dusting conditions  

SciTech Connect

We investigate the structure and surface composition of the {gamma}{prime}-Ni{sub 3}Al(111) and {beta}-NiAl(110) alloy surfaces at conditions relevant for metal dusting corrosion related to catalytic steam reforming of natural gas. In regular service as protective coatings, nickel-aluminum alloys are protected by an oxide scale, but in case of oxide scale spallation, the alloy surface may be directly exposed to the reactive gas environment and vulnerable to metal dusting. By means of density functional theory and thermochemical calculations for both the Ni{sub 3}Al and NiAl surfaces, the conditions under which CO and OH adsorption is to be expected and under which it is inhibited, are mapped out. Because CO and OH are regarded as precursors for nucleating graphite or oxide on the surfaces, phase diagrams for the surfaces provide a simple description of their stability. Specifically, this study shows how the CO and OH coverages depend on the steam to carbon ratio (S/C) in the gas and thereby provide a ranking of the carbon limits on the different surface phases.

Saadi, Souheil

2011-03-01T23:59:59.000Z

34

Transformation Induced Fatigue of Ni-Rich NiTi Shape Memory Alloy Actuators  

E-Print Network (OSTI)

In this work the transformation induced fatigue of Ni-rich NiTi shape memory alloys (SMAs) was investigated. The aerospace industry is currently considering implementing SMA actuators into new applications. However, before any new applications can be put into production they must first be certified by the FAA. Part of this certification process includes the actuator fatigue life. In this study, as-received and polished at dogbone SMA specimens underwent transformation induced fatigue testing at constant loading. The constant applied loading ranged from 100 MPa to 200 MPa. Specimens were thermally cycled through complete actuation (above Af to below Mf ) by Joule heating and environmental cooling. There were three cooling environments studied: liquid, gaseous nitrogen and vortex cooled air. It was shown that polished specimens had fatigue lives that were two to four times longer than those of as-received specimens. Test environment was also found to have an effect on fatigue life. Liquid cooling was observed to be corrosive, while the gaseous nitrogen and vortex air cooling were observed to be non-corrosive. The two non-corrosive cooling environments performed similarly with specimen fatigue lives that were twice that of specimens fatigue tested in the corrosive cooling environment. Transformation induced fatigue testing of polished specimens in a non-corrosive environment at 200 MPa had an average fatigue life of 14400 actuation cycles; at 150 MPa the average fatigue life was 20800 cycles and at 100 MPa it was 111000 cycles. For all specimens constant actuation from the beginning of testing until failure was observed, without the need for training. Finally, a microstructural study showed that the Ni3Ti precipitates in the material were one of the causes of crack initiation and propagation in the actuators.

Schick, Justin Ryan

2009-12-01T23:59:59.000Z

35

NiTiHf High-Temperature Shape-Memory Alloys for near Term ...  

Science Conference Proceedings (OSTI)

Development of a SMA-Based Drive Unit for Prehension Orthoses to Support Disabled People · Effect of H in Metals and Alloys: An Application to bcc W and NiTi ...

36

Structure-Property Relationships for Ni-Ti-Pt High Temperature ...  

Science Conference Proceedings (OSTI)

Development of a SMA-Based Drive Unit for Prehension Orthoses to Support Disabled People · Effect of H in Metals and Alloys: An Application to bcc W and NiTi ...

37

Variation of electrical resistance in superelastic NiTi for sensor applications  

E-Print Network (OSTI)

Nickel-Titanium (NiTi) is a most commonly known as a heat-activated shape memory alloy. However, the material sometimes displays a constant-temperature property called "superelasticity." A superelastic material is one which ...

Russo, Analisa

2008-01-01T23:59:59.000Z

38

Eutectic bonding of a Ti sputter coated, carbon aerogel wafer to a Ni foil  

Science Conference Proceedings (OSTI)

The formation of high energy density, storage devices is achievable using composite material systems. Alternate layering of carbon aerogel wafers and Ni foils with rnicroporous separators is a prospective composite for capacitor applications. An inherent problem exists to form a physical bond between Ni and the porous carbon wafer. The bonding process must be limited to temperatures less than 1000{degrees}C, at which point the aerogel begins to degrade. The advantage of a low temperature eutectic in the Ni-Ti alloy system solves this problem. Ti, a carbide former, is readily adherent as a sputter deposited thin film onto the carbon wafer. A vacuum bonding process is then used to join the Ni foil and Ti coating through eutectic phase formation. The parameters required for successfld bonding are described along with a structural characterization of the Ni foil-carbon aerogel wafer interface.

Jankowski, A.F.; Hayes, J.P.; Kanna, R.L.

1994-06-01T23:59:59.000Z

39

Melt Processing of Al-TiB2 Nanocomposite Materials  

Science Conference Proceedings (OSTI)

Symposium, J. Materials and Processes for Enhanced Performance ... Separation and Recovery Process of Rare Metals from Oil Desulfurization Spent Catalyst ... Pulsed Laser Evaporation: An Enabling Technology for Organic Thin Films ... Redox Investigation of NiFe2O4 Supported on Al2O3 and Yttria-Stabilized Zirconia ...

40

Metallic glass alloys of Zr, Ti, Cu and Ni  

DOE Patents (OSTI)

At least quaternary alloys form metallic glass upon cooling below the glass transition temperature at a rate less than 10.sup.3 K/s. Such alloys comprise titanium from 19 to 41 atomic percent, an early transition metal (ETM) from 4 to 21 atomic percent and copper plus a late transition metal (LTM) from 49 to 64 atomic percent. The ETM comprises zirconium and/or hafnium. The LTM comprises cobalt and/or nickel. The composition is further constrained such that the product of the copper plus LTM times the atomic proportion of LTM relative to the copper is from 2 to 14. The atomic percentage of ETM is less than 10 when the atomic percentage of titanium is as high as 41, and may be as large as 21 when the atomic percentage of titanium is as low as 24. Furthermore, when the total of copper and LTM are low, the amount of LTM present must be further limited. Another group of glass forming alloys has the formula (ETM.sub.1-x Ti.sub.x).sub.a Cu.sub.b (Ni.sub.1-y Co.sub.y).sub.c wherein x is from 0.1 to 0.3, y.cndot.c is from 0 to 18, a is from 47 to 67, b is from 8 to 42, and c is from 4 to 37. This definition of the alloys has additional constraints on the range of copper content, b.

Lin, Xianghong (Pasadena, CA); Peker, Atakan (Pasadena, CA); Johnson, William L. (Pasadena, CA)

1997-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ni ti al" 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

Microstructure and Corrosion Resistance of Pulse Electroplated Ni/nano-Al2O3 Composite Coatings  

Science Conference Proceedings (OSTI)

The Ni/nano-Al2O3 composite coatings were prepared by pulse electro-plating. The experiments of corrosion resistance were carried for 304 stainless steel, pure Ni coating and Ni/nano-Al2O3 composite coating in 3.5% NaCl and 10% HCl solutions. The microstrcuture ... Keywords: pulse electro-plating, composite coating, microhardness, corrosion resistance

Hu Bin-Liang, Tan Yuan-Qiang

2012-07-01T23:59:59.000Z

42

Thermo-Mechanical Behavior of Cu-Al-Ni SMA for High ...  

Science Conference Proceedings (OSTI)

Development of a SMA-Based Drive Unit for Prehension Orthoses to Support Disabled People · Effect of H in Metals and Alloys: An Application to bcc W and NiTi ...

43

Metallic glass alloys of Zr, Ti, Cu and Ni  

DOE Patents (OSTI)

At least quaternary alloys form metallic glass upon cooling below the glass transition temperature at a rate less than 10{sup 3} K/s. Such alloys comprise titanium from 19 to 41 atomic percent, an early transition metal (ETM) from 4 to 21 atomic percent and copper plus a late transition metal (LTM) from 49 to 64 atomic percent. The ETM comprises zirconium and/or hafnium. The LTM comprises cobalt and/or nickel. The composition is further constrained such that the product of the copper plus LTM times the atomic proportion of LTM relative to the copper is from 2 to 14. The atomic percentage of ETM is less than 10 when the atomic percentage of titanium is as high as 41, and may be as large as 21 when the atomic percentage of titanium is as low as 24. Furthermore, when the total of copper and LTM are low, the amount of LTM present must be further limited. Another group of glass forming alloys has the formula (ETM{sub 1{minus}x}Ti{sub x}){sub a} Cu{sub b} (Ni{sub 1{minus}y}Co{sub y}){sub c} wherein x is from 0.1 to 0.3, y{center_dot}c is from 0 to 18, a is from 47 to 67, b is from 8 to 42, and c is from 4 to 37. This definition of the alloys has additional constraints on the range of copper content, b. 2 figs.

Lin, X.; Peker, A.; Johnson, W.L.

1997-04-08T23:59:59.000Z

44

Investigation on Oxidation Resistance of NiCoCrAlY Coating ...  

Science Conference Proceedings (OSTI)

Presentation Title, Investigation on Oxidation Resistance of NiCoCrAlY Coating Irradiated by High Current Pulsed Electron Beam. Author(s), Xianxiu Mei, Cunxia  ...

45

Mixed-sputter deposition of Ni-Ti-Cu shape memory films  

SciTech Connect

Ni-Ti-Cu shape memory films were mixed-sputter deposited from separate nickel, titanium, and copper targets, providing increased compositional flexibility. Shape memory characteristics, examined for films with 7 at. % Cu and 41--51 at. % Tl, were determined with temperature controlled substrate curvature measurements, and microstructure was studied with transmission electron microscopy. The Ni-Ti-Cu films were found to have shape memory properties comparable to bulk materials, with transformation temperatures between 20 and 62{degree}C, a 10--13{degree}C hysteresis, and up to 330 MPa recoverable stress.

Krulevitch, P.; Ramsey, P.B.; Makowiecki, D.M.; Lee, A.P.; Northrup, M.A. [Lawrence Livermore National Lab., CA (United States); Johnson, G.C. [California Univ., Berkeley, CA (United States). Dept. of Mechanical Engineering

1994-05-01T23:59:59.000Z

46

Characterizations Of Precipitate Phases In a Ti-Ni-Pd Alloy  

Science Conference Proceedings (OSTI)

Precipitates in the Ti46Ni37.5Pd16.5 alloy were investigated by electron diffraction and high-resolution scanning transmission electron microscopy. The phase content and stability were determined at several different temperatures and times. Aging at 400 C for an hour results in a new phase, which is consumed by P-phase at longer aging time. At 450 C, the new phase appears first, and then coexists with P-phase. At 500 C, the entire alloy transformed into the new phase. At 550 C, Ti3(Ni,Pd)4 phase begins to form.

Yang, Fan; Kovarik, Libor; Phillips, Patrick J.; Noebe, Ronald D.; Mills, M. J.

2012-06-01T23:59:59.000Z

47

Friction Stir Processing of Ti-6Al-4V for Grain Size Reduction in ...  

Science Conference Proceedings (OSTI)

In Ti alloys, such as Ti-6Al-4V, fusion welding results in coarse-grained microstructure ... Friction Stir Spot Welding of Magnesium to Aluminum Alloys with a Cold ...

48

Novel and NiTi-based Shape Memory Alloys  

Science Conference Proceedings (OSTI)

Mar 4, 2013 ... Phase Constitution, Mechanical and Shape Memory Properties of (Pt,Co)Ti Alloys: Hideki Hosoda1; Satoshi Tsutsumi1; Masaki Tahara1; ...

49

Ni-Pt silicide formation through Ti mediating layers  

Science Conference Proceedings (OSTI)

With Ni"1"-"xPt"xSi, the variation in queue time between the final surface cleaning and Ni-Pt deposition represents a significant manufacturability issue. A short queue time is often difficult to maintain, leading to the formation of an oxide layer on ... Keywords: Mediated reaction, Nickel silicide, Oxidation, Titanium

Paul Besser; Christian Lavoie; Ahmet Ozcan; Conal Murray; Jay Strane; Keith Wong; Michael Gribelyuk; Yun-Yu Wang; Christopher Parks; Jean Jordan-Sweet

2007-11-01T23:59:59.000Z

50

Effects of the Ti/Al atomic ratio on the properties of gradient (Ti,Al)N films synthesized by ion beam assisted deposition  

SciTech Connect

Gradient (Ti,Al)N films were prepared on high speed steel (HSS) and Si (111) wafers by using two Ar{sup +} beams to sputter a titanium target and an aluminum target separately, and a third N{sup +} beam to simultaneously bombard the growing film to assist deposition. The effects of the Ti/Al atomic ratio in the films on properties such as hardness, stress, and adhesion strength were investigated systematically. The results indicated that both the hardness and the adhesion of gradient (Ti,Al)N films to steel substrates exhibited {open_quotes}peak{close_quotes} type changes with an increase of the Ti/Al atomic ratio, and a maximum hardness of 3780thinspkgfthinspmm{sup {minus}2} was reached at a Ti/Al ratio of 5.35. The compressive stress of gradient (Ti,Al)N films increased with increasing Al content in the films. It was found that extreme hardness, high adhesion strength and low stress gradient (Ti,Al)N films can be synthesized on low temperature HSS steel by using the ion beam assisted deposition process.

He, X.; Shu, L.; Xie, Z.W. [Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

1999-03-01T23:59:59.000Z

51

Glass Forming Ability in Pr-(Cu, Ni)-Al Alloys  

E-Print Network (OSTI)

Glass forming ability (GFA) in the Pr-rich Pr-(Cu, Ni)-Al alloys at or near the eutectic points was systematically studied. It was found that the GFA in the pseudo-ternary alloys of Pr-(Cu, Ni)-Al is higher than that of ...

Zhang, Yong

52

27Al and 1H Solid State NMR Studies Show Evidence of TiAl3 and TiH2 in Ti-doped NaAlH4  

DOE Green Energy (OSTI)

Previous X-ray Diffraction (XRD) and Nuclear Magnetic Resonance (NMR) studies on Ti-doped NaAlH{sub 4} revealed the reaction products of two heavily doped (33.3 at.%) samples that were solvent-mixed and mechanically-milled. This investigation revealed that nano-crystalline or amorphous Al{sub 2}O{sub 3} forms from the possible coordination of aluminum with oxygen atom of the furan ring system from added tetrahydrofuran (THF) in the solvent-mixed sample, and that TiAl{sub 3} forms in mechanically-milled samples. The present paper provides a more sophisticated NMR investigation of the these materials. On heavily doped (33.3 at.%) solvent-mixed samples, {sup 27}Al Magic Angle Spinning (MAS) NMR {sup 27}Al multiple quantum MAS (MQMAS) indicates the presence of an oxide layer of Al{sub 2}O{sub 3} on the surfaces of potentially bulk nanocrystalline Ti, nanocrystalline TiAl{sub 3}, and/or metallic aluminum. The {sup 1}H MAS NMR data also indicate the possible coordination of aluminum with the oxygen atom in the THF. On heavily doped samples that were mechanically milled, {sup 27}Al MAS NMR and static NMR confirms the presence of TiAl{sub 3}. In addition, the {sup 1}H MAS NMR and {sup 1}H spin-lattice relaxation (T{sub 1}) measurements are consistent with the presence of TiH{sub 2}. These results are in agreement with recent XAFS measurements indicating both Al and H within the first few coordination shells of Ti in the doped alanate.

Herberg, J; Maxwell, R; Majzoub, E

2005-05-26T23:59:59.000Z

53

Modification of Ni state to promote the stability of Ni-Al{sub 2}O{sub 3} catalyst in methane decomposition to produce hydrogen and carbon nanofibers  

SciTech Connect

The methodology was illustrated for modifying the state of Ni to promote the stability of the coprecipitated Ni-Al{sub 2}O{sub 3} catalyst via incorporating ZnO and Cu in methane decomposition to produce hydrogen and carbon nanofibers. The influences of the incorporation on the state of Ni were examined with XRD, TPR, XPS and TEM. For the incorporation of ZnO, ZnAl{sub 2}O{sub 4} spinel-like structure could be formed in the interface between ZnO and Al{sub 2}O{sub 3}. The interaction between Ni and the ZnAl{sub 2}O{sub 4} structure can promote both the activity and the stability of Ni in methane decomposition. The formation of a Ni-Cu alloy from Ni and the incorporated Cu decreases the activity of Ni, however, promotes the stability pronouncedly. - Graphical abstract: Highlights: Black-Right-Pointing-Pointer Methodology for modifying Ni state of coprecipitated Ni-Al{sub 2}O{sub 3} was illustrated. Black-Right-Pointing-Pointer Influence of incorporating ZnO/Cu on Ni state of Ni-Al{sub 2}O{sub 3} was compared. Black-Right-Pointing-Pointer Influence of modifying Ni state on performance of Ni-Al{sub 2}O{sub 3} was investigated.

Chen Jiuling, E-mail: cjlchen@yahoo.com [Department of Catalysis Science and Technology, School of Chemical Engineering, Tianjin University, Tianjin 300072 (China); Qiao Yuanhua; Li Yongdan [Department of Catalysis Science and Technology, School of Chemical Engineering, Tianjin University, Tianjin 300072 (China)

2012-07-15T23:59:59.000Z

54

Microscopic Study on the Interface Reaction between Ti and Al-Zn ...  

Science Conference Proceedings (OSTI)

Presentation Title, Microscopic Study on the Interface Reaction between Ti and Al -Zn Alloy during Ultra-Fast Heat Treatment. Author(s), Yue Zhao, David Nolan, ...

55

Nano-laminated Ti3Al Porous Structure Produced by Hot Forging ...  

Science Conference Proceedings (OSTI)

Extending Bulk CALPHAD Methods to Interfaces and Nanomaterials to Help ... Ti3Al Porous Structure Produced by Hot Forging and Selective Dissolution.

56

High Temperature coatings based on {beta}-NiAI  

Science Conference Proceedings (OSTI)

High temperature alloys are reviewed, focusing on current superalloys and their coatings. The synthesis, characerization, and oxidation performance of a NiAl–TiB{sub 2} composite are explained. A novel coating process for Mo–Ni–Al alloys for improved oxidation performance is examined. The cyclic oxidation performance of coated and uncoated Mo–Ni–Al alloys is discussed.

Severs, Kevin

2012-07-10T23:59:59.000Z

57

Investigation of Ti-doped NaAlH4 by solid-state NMR  

DOE Green Energy (OSTI)

In recent years, the development of Ti-doped NaAlH{sub 4} as a hydrogen storage material has gained attention because of its large weight percentage of hydrogen ({approx}5%) compared to traditional interstitial hydrides. The addition of transition-metal dopants, in the form of Ti-halides, such as TiCl{sub 3}, dramatically improves the kinetics of the absorption and desorption of hydrogen from NaAlH{sub 4}. However, the role that Ti plays in enhancing the absorption and desorption of H{sub 2} is still unknown. In the present study, {sup 27}Al, {sup 23}Na, and {sup 1}H MAS (Magic Angle Spinning) NMR (Nuclear Magnetic Resonance) has been performed to understand the titanium speciation in Ti-doped NaAlH{sub 4}. All experiments were performed on a sample of crushed single crystals exposed to Ti during growth, a sample of solvent-mixed 4TiCl{sub 3} + 112NaAlH{sub 4}, a reacted sample of solvent-mixed TiCl{sub 3} + {sup 3}NaAlH{sub 4} with THF, and a reacted sample of ball-milled TiCl3 + 3NaAlH{sub 4}. The {sup 27}Al MAS NMR has shown differences in compound formation between solvent-mixed TiCl{sub 3} + 3NaAlH{sub 4} with THF and the mechanically ball-milled TiCl{sub 3} + 3NaAlH{sub 4}. {sup 27}Al MAS NMR of the mechanically ball-milled mixture of fully-reacted TiCl{sub 3} + 3NaAlH{sub 4} showed spectral signatures of TiAl{sub 3} while, the solvent-mixed 4TiCl{sub 3} + 112NaAlH{sub 4}, which is totally reacted, does not show the presences of TiAl{sub 3}, but shows the existence of Al{sub 2}O{sub 3}.

Maxwell, R; Majzoub, E; Herberg, J

2003-11-24T23:59:59.000Z

58

Growth and Properties of (001)-oriented Pb(Zr?.??Ti?.??)O?/LaNiO? Films on Si(001) Substrates with TiN Buffer Layers  

E-Print Network (OSTI)

Pulsed laser deposition has been used to grow Pb(Zr?.??Ti?.??)O? (PZT)/LaNiO? (LNO) heterostructures with restricted crystallographic orientations on bare Si(001) and SiO?-coated Si(001) substrates, using TiN buffer layers. ...

Zhu, Tie-Jun

59

Improved Off-State Stress Critical Voltage on AlGaN/GaN High Electron Mobility Transistors Utilizing Pt/Ti/Au Based Gate Metallization  

Science Conference Proceedings (OSTI)

The critical voltage for degradation of AlGaN/GaN high electron mobility transistors (HEMTs) employed with the Pt/Ti/Au gate metallization instead of the commonly used Ni/Au was significantly increased during the off-state stress. The typical critical voltage for HEMTs with Ni/Au gate metallization was around -60V. By sharp contrast, no critical voltage was observed for the HEMTs with Pt/Ti/Au gate metallization, even up to -100V, which was the instrumental limitation in this experiment. Both Schottky forward and reverse gate characteristics of the Ni/Au degraded once the gate voltage passed the critical voltage of around -60V. There was no degradation exhibited for the HEMTs with Pt-gated HEMTs.

Lo, C. F. [University of Florida; Liu, L. [University of Florida, Gainesville; Kang, Tsung Sheng [University of Florida, Gainesville; Davies, Ryan [University of Florida; Gila, Brent P. [University of Florida, Gainesville; Pearton, S. J. [University of Florida; Kravchenko, Ivan I [ORNL; Laboutin, O. [Kopin Corporation, Taunton, MA; Cao, Yu [Kopin Corporation, Taunton, MA; Johnson, Wayne J. [Kopin Corporation, Taunton, MA; Ren, F. [University of Florida

2011-01-01T23:59:59.000Z

60

Synthesis of mesoporous NiO doped TiO{sub 2} submicrosphere via spray hydrolysis  

Science Conference Proceedings (OSTI)

NiO doped TiO{sub 2} submicrosphere have been prepared via spray hydrolysis. The doping concentration has been varied form 2 wt% to 15 wt%. Morphology of the submicrospheres has been investigated using small-angle neutron scattering and scanning electron microscopy. Elemental analysis has been carried out by energy dispersive X-ray analysis which confirms the doping concentrations. The mesopores in submicrospheres possess cylindrical morphology.

Bahadur, J.; Sen, D.; Prakash, J.; Singh, Ripandeep; Paul, B.; Mazumder, S.; Sathiyamoorthy, D. [Solid State Physics Division Bhabha Atomic Research Centre, Mumbai, 400085, India (India); Powder Metallurgy Division Bhabha Atomic Research Centre, Mumbai, 400085 (India); Solid State Physics, Division Bhabha Atomic Research Centre, Mumbai, 400085 (India); Materials Processing Division Bhabha Atomic Research Centre, Mumbai, 400085 (India); Solid State Physics Division Bhabha Atomic Research Centre, Mumbai, 400085 (India); Powder Metallurgy Division Bhabha Atomic Research Centre, Mumbai, 400085 (India)

2012-06-05T23:59:59.000Z

Note: This page contains sample records for the topic "ni ti al" 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

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

SciTech Connect

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

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

2012-01-01T23:59:59.000Z

62

Evaluation of the Ni 3 Al Base Alloys IC221 and IC218LZr  

Science Conference Proceedings (OSTI)

National Laboratory (ORNL). This paper deals with properties of the two Ni Al base alloys, IC218LZr and IC221 whose compositions are given in Table I. These  ...

63

Electrochemical and in situ neutron diffraction investigations of La-Ni-Al-H alloys  

DOE Green Energy (OSTI)

Li/metal hydride batteries are a strong contender to replace Ni/Cd batteries. Since the role of alloying components is not yet understood, a combination of electrochemical and neutron diffraction techniques has been designed to investigate metal hydrides. In this work, several Al-substituted LaNi{sub 5} alloys were investigated for their specific capacity (measured by mAh/La and symbolized by x in LaNi{sub 5-y}Al{sub y}H{sub x}), impedance, and cycling stability. Neutron diffraction was used to study the electrochemically induced phase transformation and structure change during charge/discharge.

Peng, W. [Illinois Institute of Technology (United States); Redey, L.; Vissers, D.R.; Myles, K.M.; Carpenter, J.; Richardson; Burr, G. [Argonne National Lab., IL (United States)

1996-05-01T23:59:59.000Z

64

Characterization of Ultrathin Films of -Al2O3 and the Chemistry of 1,3-Butadiene on NiAl(001) and -Al2O3  

E-Print Network (OSTI)

Characterization of Ultrathin Films of -Al2O3 and the Chemistry of 1,3-Butadiene on NiAl(001) and -Al2O3 Michelle M. Ivey, Kathryn A. Layman, Armen Avoyan, Heather C. Allen, and John C. HemmingerVine, California 92697 ReceiVed: October 3, 2002; In Final Form: March 27, 2003 Ultrathin films of -Al2O3 grown

65

Diffusion in L12 Structures: A Comparison of Ni3Al, Ni3Ga and Ni3Ge  

Science Conference Proceedings (OSTI)

... that while the diffusivities of the majority component Ni in these compounds are similar, ... First Order Structural Transformations in Symmetrical Tilt S5 Grain ...

66

Phase Transformation and Equilibrium Diagram of Ti-Al-Nb Ternary ...  

Science Conference Proceedings (OSTI)

The phase type and distribution range of Ti-Al-Nb ternary alloy, as well as calculated phase diagram, were directly obtained by TC calculation, as a instruction of ...

67

Reactivity of Ti2AlC with SiC Fibers and Powders up to ...  

Science Conference Proceedings (OSTI)

Herein we investigated the reactivity of Ti2AlC [3ONE2] with SiC fibers [Avco Specialty Materials and Nippon Carbon Co.] and fine SiC powders [Superior ...

68

Improving Stress Rupture Life of Alloy 718 by Optimizing Al, Ti ... - TMS  

Science Conference Proceedings (OSTI)

IhlPRO\\.'IIVG STRESS RUPTURE LIFE OF ALLOY 718 BY. OPTIXllZING AL, TI, P AND B CONTENTS. W. D. Cao and R. L. Kennedy. ,All\\ ac. An Allegheny ...

69

An overview of the welding of Ni{sub 3}Al and Fe{sub 3}Al alloys  

Science Conference Proceedings (OSTI)

Weldability (degree to which defect formation is resisted when an alloy is welded) is an issue in fabrication of Ni{sub 3}Al and Fe{sub 3}Al. Work to define and improve welding of Ni{sub 3}Al and Fe{sub 3}Al alloys is reviewed and progress illustrated by examples of current activities. The cast Ni{sub 3}Al alloys currently under development, IC221M and IC396M, have low resistance to solidification cracking and hence difficult to weld. Modifications to the composition of both base alloys and weld deposits,however, increase their resistance to cracking. Crack-free, full-penetration welds were made in centrifugally cast tubes of IC221M. Tensile and stress- rupture properties of the weldments compare favorably with base metal properties. Weldability issues have limited the use of Fe{sub 3}Al alloys to weld overlay applications. Filler metal compositions suitable for weld overlay cladding were developed, and the preheat and postweld heat treatment needed to avoid cracking, were determined experimentally.

Santella, M.L.

1996-12-31T23:59:59.000Z

70

Hf-Doped Ni-Al2O3 Interfaces at Equilibrium  

SciTech Connect

In this study, a series of dewetting experiments of pure and Hf-doped Ni films on sapphire and HfO2 substrates were conducted in order to measure the change in interface energy of the Ni-Al2O3 interface in the presence of Hf, and to study Hf interfacial segregation. It was found that Hf oxidizes under the conditions of the experiment (P(O2)=10-20atm.), and that the presence of HfO2 at the Ni-Al2O3 interface increases the interface energy from 2.16 0.2 to 2.7 0.4 [J/m2]. This result contradicts several theoretical studies that predict that Hf segregates to the interface to stabilize it thermodynamically. The solubility of Hf in bulk Ni was found to be significantly lower than the value reported in the equilibrium phase diagram.

Meltzman, Hila [Technion, Israel Institute of Technology; Besmann, Theodore M [ORNL; Kaplan, Prof. Wayne D. [Technion, Israel Institute of Technology

2012-01-01T23:59:59.000Z

71

The comparison of sulfide CoMo/?-Al2O3 and NiMo/?-Al2O3 catalysts in methyl palmitate and methyl heptanoate hydrodeoxygenation  

Science Conference Proceedings (OSTI)

The hydrodeoxygenation of methyl palmitate and methyl heptanoate as the model compounds of bio-oil in the presence of sulfided CoMo/?-Al2O3 and NiMo/?-Al2O3 catalysts was studied at the temperature ... Keywords: CoMoS/?-Al2O3, NiMoS/?-Al2O3, biofuels, hydrodeoxygenation, methyl heptanoate, methyl palmitate

Irina V. Deliy; Evgenia N. Vlasova; Alexey L. Nuzhdin; Galina A. Bukhtiyarova

2011-12-01T23:59:59.000Z

72

Certain aspects of the melting, casting and welding of Ni{sub 3}Al alloys  

Science Conference Proceedings (OSTI)

Two alloys under development for castings are IC221M, (nominal composition Ni-8Al-7.7Cr-1.4Mo-1.7Zr wt %), and IC396M (nominal composition Ni-8Al-7.7Cr-3Mo-0.85Zr wt %). These alloys can be melted and cast using the techniques normally used for Ni-based materials. Oxidation of the liquid alloys can be controlled by vacuum processing or inert gas cover during processing. The liquid alloys can react with silica and zircon sands during casting, but this can be controlled through the use of appropriate mold washes like carbon-based materials. Welding studies showed that these alloys are susceptible to solidification cracking in weld fusion zones; the cracks are generally associated with occurrence of Ni-Ni{sub 5}Zr eutectic in interdendritic regions of the weld. Amount of eutectic in the weld microstructures increases with Zr concentration in weld filler metal. Weld filler metal Zr concentrations of 3 wt % and higher prevented solidification cracking of weld deposits on the base casting alloys; This is consistent with accepted phenomonological theory of this process. A weld filler metal with a composition of Ni-8Al-7.7Cr-1.5Mo-3.0Zr wt % was prepared and used to gas tungsten arc weld together 15-mm-thick plates of the IC221M alloy. This weldment was free of cracks. Weldment tensile specimens were machined from the plate and tested at 21, 800, and 900 C. Weldment yield strength at elevated temperatures was higher than room temperature and nearly comparable with that of the base IC221M alloy. Evaluation of the cast Ni{sub 3}Al alloys for furnace furniture, turbocharger rotors, and manufacturing tooling is also briefly discussed.

Santella, M.L.; Sikka, V.K.

1994-06-01T23:59:59.000Z

73

Interfaces in Ti[sub 3]Al composites reinforced with sigma SiC fibres  

Science Conference Proceedings (OSTI)

When SCS-6 fibers are used for reinforcing Ti[sub 3]Al matrices, a [beta]-depleted zone is often found in the matrix adjacent to the interface, varying from 3 to 7 [mu]m in thickness depending on the composition of the matrix. The cause for such depletion is believed to be the migration of the [beta] stabilizer, Nb, from the adjacent matrix into the reaction zone, which forms Nb-containing compounds such as (Ti,Nb)C and (Ti,Nb)[sub 5]Si[sub 3]. The depletion of [beta] near the interface can enhance the propensity for interfacial cracking as the more brittle [alpha][sub 2] phase is enriched. Here, the authors present a study of the interfaces in a Ti[sub 3]Al/SiC Sigma fiber composite. The reaction products, changes in microstructure and reaction kinetics are compared with Ti-6Al-4V matrix containing Sigma fibers and Ti[sub 3]Al matrices containing SCS fibers.

Guo, Z.X.; Derby, B. (Univ. of Oxford (United Kingdom). Dept. of Materials)

1994-01-01T23:59:59.000Z

74

Aging effects in palladium and LaNi sub 4. 25 Al sub 0. 75 tritides  

DOE Green Energy (OSTI)

Palladium and LaNi{sub 5-x}Al{sub x} (x=0.30, 0.75, 0.85), which form reversible hydrides, are used for tritium processing and storage in the Savannah River Site (SRS) tritium facilities. As part of a program to develop technology based on the use of reversible metal hydrides for tritium processing and storage, the effects of aging on the thermodynamic behavior of palladium and LaNi{sub 4.25}Al{sub 0. 75} tritides are under investigation. During aging, the {sup 3}He tritium decay product remains in the tritide lattice and changes the thermodynamics of the tritium-metal tritide system. Aging effects in 755-day-aged palladium and 1423-day-aged LaNi{sub 4.25}Al{sub 0.75} tritides will be reported. Changes in the thermodynamics were determined by measuring tritium desorption isotherms on aging samples. In palladium, aging decreases the desorption isotherm plateau pressure and changes the {alpha}-phase portion of the isotherm. Aging-induced changes in desorption isotherms are more drastic in LaNi{sub 4.25}Al{sub 0.75}. Among the changes noted are: (1) decreased isotherm plateau pressure, (2) increased isotherm plateau slope, and (3) appearance of deep-trapped tritium, removable only by exchange with deuterium.

Nobile, A.; Wermer, J.R.; Walters, R.T.

1991-01-01T23:59:59.000Z

75

Ni3Al-based alloys for die and tool application  

SciTech Connect

A novel Ni.sub.3 Al-based alloy exhibits strengths and hardness in excess of the standard base alloy IC-221M at temperatures of up to about 1000.degree. C. The alloy is useful in tool and die applications requiring such temperatures, and for structural elements in engineering systems exposed to such temperatures.

Liu, Chain T. (Oak Ridge, TN); Bloom, Everett E. (Kingston, TN)

2001-01-01T23:59:59.000Z

76

L-shell photoabsorption spectroscopy for solid metals: Ti, V, Cr, Fe, Ni, Cu  

Science Conference Proceedings (OSTI)

Synchrotron radiation measurements of near-threshold and broad-range (400--1500 eV) absolute photoabsorption cross sections were made for five transition metals with {plus minus}10% overall uncertainties. Fine structure details of 2p-3d autoionizing resonances are shown with better than 1.0 eV resolution for solid metals: Ti, V, Cr, Fe, Ni, and Cu. Fine structure similar to what we measured can be produced using a multi-configuration Dirac Fock (MCDF) model if a statistical distribution is assumed for the initial atomic states. Calculations were performed in intermediate coupling with configuration interactions by Mau H. Chen. The results are compared with other experimental work and theoretical methodologies. 18 refs., 7 figs.

Del Grande, N.K. (Lawrence Livermore National Lab., CA (USA))

1989-09-13T23:59:59.000Z

77

Catalytic Effect of Ti for Hydrogen Cycling in NaAlH4  

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

Effect of Ti for Effect of Ti for Hydrogen Cycling in NaAlH 4 Mei-Yin Chou School of Physics Georgia Institute of Technology (DE-FG02-05ER46229) Acknowledgment: Yan Wang, Roland Stumpf Why is NaAlH 4 interesting? A viable candidate for hydrogen-storage material: High theoretical weight-percent hydrogen content of 5.55% and low cost But (before 1997) Dehydrogenation occurs at high temperature; rehydrogenation is difficult. Bogdanovic and Schwickardi, 1997 Hydrogen can be reversibly absorbed and desorbed from NaAlH 4 under moderate conditions by the addition of catalysts (compounds containing Ti, Zr, etc.) High Hydrogen Contents in Complex Hydrides Hydride wt% Hydride wt% Be(BH 4 ) 2 20.8 Mg(AlH 4 ) 2 9.3 LiBH 4 18.2 Ca(AlH 4 ) 2 7.9 Mg(BH 4 ) 2 14.9 KBH 4 7.5 Ca(BH 4 ) 2 11.6 NaAlH 4 7.5 NaBH4 10.7 Ga(AlH

78

TiNiSn: A gateway to the (1,1,1) intermetallic compounds  

DOE Green Energy (OSTI)

Recent awareness of the transport properties of Skutterudite pnictides has stimulated an interest in numerous other intermetallic compounds having a gap in the density of states at the Fermi level including the MNiSn compounds where M = (Ti, Zr, Hf). These intermetallic half-Heusler compounds are characterized by high Seebeck coefficients ({minus}150 to {minus}300 {micro}V/deg.) and reasonable carrier mobilities (30 to 50 cm{sup 2}/V-s) at room temperature which make them attractive candidates for intermediate temperature thermoelectric applications. Samples of TiNiSn were prepared by arc melting and homogenized by heat treatment. The temperature dependence of the electrical resistivity, Seebeck coefficient, and thermal diffusivity of these samples was characterized between 22 C and 900 C. The electrical resistivity and thermopower both decrease with temperature although the resistivity decreases at a faster rate. Electrical power factors in excess of 25 {micro}W/cm-C{sup 2} were observed in nearly single phase alloys within a 300 to 600 C temperature range. A brief survey of other selected ternary intermetallic compounds is also presented.

Cook, B.A.; Harringa, J.L. [Ames Lab., IA (United States); Tan, Z.S.; Jesser, W.A. [Univ. of Virginia, Charlottesville, VA (United States). Dept. of Materials Science and Engineering

1996-06-01T23:59:59.000Z

79

TiO2 Nanotubes Filled with NiFe2O4 Quantum Dots and Ni-Fe ...  

Science Conference Proceedings (OSTI)

The obtained TiO2NTs were filled with ... in the temperature range 25-850 °C. The modified TiO2NTs were also tested for ...

80

Variant Selection during Alpha Precipitation in Ti-6Al-4V under the ...  

Science Conference Proceedings (OSTI)

... to available thermodynamic and mobility databases, but also incorporating the ... Characterizing and Exploring the Broad Utility of Kinetic Metallization, ... Effect of Heating Rate on the Short Time Aging Kinetics of Ti-6.8Mo-4.5Fe-1.5Al.

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81

PLASMA SPRAYED Ni-Al COATINGS FOR SAFE ENDING HEAT EXCHANGER TUBES  

DOE Green Energy (OSTI)

Brookhaven National Laboratory (BNL) has developed thermally conductive composite liners for corrosion and scale protection in heat exchanger tubes exposed to geothermal brine. The liners cannot withstand roller expansion to connect the tubes to the tubesheet. It is not possible to line the ends of the tubes with the same material after roller expansion due to the nature of the current liner application process. It was requested that BNL evaluate plasma sprayed Ni-Al coatings for safe ending heat exchanger tubes exposed to geothermal brine. The tubes of interest had an internal diameter of 0.875 inches. It is not typical to thermal spray small diameter components or use such small standoff distances. In this project a nozzle extension was developed by Zatorski Coating Company to spray the tube ends as well as flat coupons for testing. Four different Ni-Al coatings were investigated. One of these was a ductilized Ni-AIB material developed at Oak Ridge National Laboratory. The coatings were examined by optical and scanning electron microscopy. In addition, the coatings were analyzed by X-ray diffraction and subjected to corrosion, tensile adhesion, microhardness and field tests in a volcanic pool in New Zealand. It was determined that the Ni-Al coatings could be applied to a depth of two inches on the tube ends. When sprayed on flat coupons the coatings exhibited relatively high adhesion strength and microhardness. Polarization curves showed that the coating performance was variable. Measured corrosion potentials indicated that the Ni-Al coatings are active towards steel coated with thermally conductive polymers, thereby suggesting preferential corrosion. Corrosion also occurred on the coated coupons tested in the volcanic pool. This may have been exacerbated by the difficulty in applying a uniform coating to the coupon edges. The Ni-Al coatings applied to the tubes had significant porosity and did not provide adequate corrosion protection. This is associated with the short standoff distance and is not a reflection of the normal quality of plasma sprayed coatings. Even if coating porosity could be reduced, the coupling of an alloy coating to a polymer-based barrier coating in the same electrolyte is not recommended. Therefore, polymer coatings that can be field applied to the tube ends after roller expansion should be sought.

ALLAN,M.L.; OTTERSON,D.; BERNDT,C.C.

1998-11-01T23:59:59.000Z

82

Lattice variations of Ti-6Al-4V alloy with hydrogen content  

Science Conference Proceedings (OSTI)

Effect of hydrogen content on the lattice parameter of Ti-6Al-4V alloy has been investigated by X-ray diffraction. The experimental results show that the solution of hydrogen in the Ti-6Al-4V alloy affects significantly on the lattice parameters of {alpha}, {beta} and {delta} phases, especially the {beta} phase. Furthermore, the critical hydrogen content of {delta} hydride formation for Ti-6Al-4V alloy is 0.385 wt.%. When the hydrogen content is lower than the critical hydrogen content, the {delta} hydride cannot precipitate and the lattice parameter ({alpha}) of {beta} phase linearly increases with the increasing of hydrogen content. When the hydrogen content is higher than the critical hydrogen content, the {delta} hydride precipitates and the lattice parameter ({alpha}) of {beta} phase varies inconspicuously with hydrogen content. In addition, the effects of lattice variations and {delta} hydride formation on microstructure are discussed. The {alpha}/{beta} interfaces of lamellar transformed {beta} phase become fuzzy with the increasing of hydrogen content because of the lattice expansion of {beta} phase. Compared with that of the Ti-6Al-4V alloy at low hydrogen content ({=} 0.385 wt.%) were completely reversed due to the formation of {delta} hydride. - Research Highlights: {yields} A novel method for determining {delta} hydride in Ti-6Al-4V alloy is presented. {yields} The critical hydrogen content of {delta} hydride formation is 0.385 wt.%. {yields} The lattice parameter of {beta} phase can be expressed as follows: a=0.323(1+9.9x10{sup -2}C{sub H}) . {yields} Precipitation of {delta} hydride has a significant influence on the microstructure. {yields} The {alpha}/{beta} interfaces of transformed {beta} phase became fuzzy in the hydrogenated alloy.

Zhu Tangkui, E-mail: zhutangkui@sohu.com; Li, Miaoquan, E-mail: honeymli@nwpu.edu.cn

2011-07-15T23:59:59.000Z

83

Improving the phase stability and oxidation resistance of B-NiAl  

SciTech Connect

High temperature alloys are essential to many industries that require a stable material to perform in harsh oxidative environments. Many of these alloys are suited for specific applications such as jet engine turbine blades where most other materials would either melt or oxidize and crumble (1). These alloys must have a high melting temperature, excellent oxidation resistance, good creep resistance, and decent fracture toughness to be successfully used in such environments. The discovery of Ni based superalloys in the 1940s revolutionized the high temperature alloy industry and there has been continued development of these alloys since their advent (2). These materials are capable of operating in oxidative environments in the presence of combustion gases, water vapor and at temperatures around 1050 C. Demands for increased f uel efficiency, however, has highlighted the need for materials that can be used under similar atmospheres and at temperatures in excess of 1200 C. The current Ni based superalloys are restricted to lower temperatures due to the presence of a number of low melting phases that result in softening of the alloys above 1000 C. Therefore, recent research has been aimed at exploring and developing newer alloy systems that can meet the escalating requirements. This thesis comprises a part of such an effort. The motivation of this work is to develop a novel high temperature alloy system that shows improved performance at higher temperatures than the currently employed alloys. The desired alloy should be in accordance with the requirements established in the National Energy Technology Laboratory (NETL) FutureGen program having an operating temperature around 1300 C. Alloys based on NiAl offer significant potential payoffs as structural materials in gas turbine applications due to a unique range of physical and mechanical properties. Alloying additions to NiAl could be used to further improve the pertinent properties that currently limit this system from replacing Ni based superalloys. Modifications to NiAl were explored to increase the phase stability and oxidation resistance which would allow these alloys to be used at even higher temperatures yielding greater efficiencies. The extended Miedema model was an effective tool that screened all of the potential phase space for ternary substitutions to NiAl and found the few potential systems worth further investigation. After production of the alloys it was determined that Ir, Rh, and Pd were the top candidates for substitution on Ni site up to 12 at%. The melting temperature of NiAl could be increased as much as 150 C with 12 at% Ir and 130 C with 12 at% Rh substitution. Pall adium on the other hand decreased the melting temperature by 50 C at the 12 at% substitution level. The grain size was found to have a profound influence on the oxidation resistance. Both Ir and Rh substitutions resulted in finer grain sizes compared to Pd substitutions or base NiAl. The grain size increased drastically during high temperature annealing with the PGM substitutions hindering grain growth only slightly. However, the addition of 0.05 at% Hf limited the grain growth dramatically during high temperature annealing. NiAl inherently has respectable oxidation resistance up to 1100 C. It was found through experimental testing that both Ir and Rh substitutions improve the oxidation resistance of NiAl at ultra-high temperatures with Ir performing the best. Both PGM substitutions decreased the growth rate as well as forming a more adherent oxide scale. Pd substitutions appeared to have a negligible effect to the oxidation resistance of NiAl. Hafnium addition of 0.05 at% was found to decrease the oxidation rate as well as increase the scale adherence. The combination of both Ir substitution (6-9 at%) and Hf addition (0.05 at%) produced the alloy with the best oxidation resistance. Although improvements in phase stability and oxidation resistance have been made to the NiAl system, more development and testing are still needed. Two major issues yet to be resolved are the low fracture toughn

Brammer, Travis

2011-08-15T23:59:59.000Z

84

Formation and Stability of Ni-Al Hydroxide Phases in Soils  

E-Print Network (OSTI)

Formation and Stability of Ni-Al Hydroxide Phases in Soils E D W A R D P E L T I E R , § , * , D A N I E L V A N D E R L E L I E , A N D D O N A L D L . S P A R K S Environmental Soil Chemistry Research Group, Department of Plant and Soil Sciences and Delaware Environmental Institute, 152 Townsend

Sparks, Donald L.

85

Plasma Sprayed Ni-Al Coatings for Safe Ending Heat Exchanger Tubes  

DOE Green Energy (OSTI)

Brookhaven National Laboratory (BNL) has developed thermally conductive composite liners for corrosion and scale protection in heat exchanger tubes exposed to geothermal brine. The liners cannot withstand roller expansion to connect the tubes to the tubesheet. It is not possible to line the ends of the tubes with the same material after roller expansion due to the nature of the current liner application process. It was requested that BNL evaluate plasma sprayed Ni-Al coatings for safe ending heat exchanger tubes exposed to geothermal brine. The tubes of interest had an internal diameter of 0.875 inches. It is not typical to thermal spray small diameter components or use such small standoff distances. In this project a nozzle extension was developed by Zatorski Coating Company to spray the tube ends as well as flat coupons for testing. Four different Ni-Al coatings were investigated. One of these was a ductilized Ni-AlB material developed at Oak Ridge National Laboratory. The coatings were examined by optical and scanning electron microscopy. In addition, the coatings were analyzed by X-ray diffraction and subjected to corrosion, tensile adhesion, microhardness and field tests in a volcanic pool in New Zealand.

Allen, M.L.; Berndt, C.C.; Otterson, D.

1998-11-01T23:59:59.000Z

86

Overall Photocatalytic Water Splitting with NiOx-SrTiO3 – A Revised Mechanism  

Science Conference Proceedings (OSTI)

NiOx (0 water splitting under UV light. The established mechanism for this and many other NiOx containing catalysts assumes water oxidation to occur at the early transition metal oxide and water reduction at NiOx. Here we show that NiOx-STO is more likely a three component Ni-STO-NiO catalyst, in which STO absorbs the light, Ni reduces protons, and NiO oxidizes water. This interpretation is based on systematic H2/O2 evolution tests of appropriately varied catalyst compositions using oxidized, chemically and photochemically added nickel and NiO nanoparticle cocatalysts. Surface photovoltage (SPV) measurements reveal that Ni(0) serves as an electron trap (site for water reduction) and that NiO serves as a hole trap (site for water oxidation). Electrochemical measurements show that the overpotential for water oxidation correlates with NiO content, whereas the water reduction overpotential depends on Ni content. Photodeposition experiments with NiCl2 and H2PtCl6 on NiO-STO show that electrons are available on the STO surface, not on the NiO particles. Based on photoelectrochemistry, both NiO and Ni particles suppress the Fermi level in STO, but the effect of this shift on catalytic activity is not clear. Overall, the results suggest a revised role for NiO in NiOx-STO and in many other nickel-containing water splitting systems, including NiOx-La:KTaO3, and many layered perovskites.

Townsend, Troy K.; Browning, Nigel D.; Osterloh, Frank

2012-11-01T23:59:59.000Z

87

Model for projectile fragmentation: case study for Ni on Ta, Be and Xe on Al  

E-Print Network (OSTI)

For projectile fragmentation we work out details of a model whose origin can be traced back to the Bevalac era. The model positions itself between the phenomenological EPAX parametrization and microscopic transport models like "Heavy Ion Phase Space Exploration Model" (HIPSE) and antisymmetrised molecular dynamics(AMD). We apply the model to some recent data of projectile fragmentation of Ni on Ta and Be at beam energy 140 MeV/nucleon and some older data of Xe on Al at beam energy 790 MeV/nucleon. Reasonable values of cross-sections for various composites populated in the reactions are obtained.

S. Mallik; G. Chaudhuri; S. Das Gupta

2010-12-30T23:59:59.000Z

88

Properties of ion implanted Ti-6Al-4V processed using beamline and PSII techniques  

DOE Green Energy (OSTI)

The surface of Ti-6Al-4V (Ti64) alloy has been modified using beamline implantation of boron. In separate experiments, Ti64 has been implanted with nitrogen using a plasma source ion implantation (PSII) technique utilizing either ammonia (NH{sub 3}), nitrogen (N{sub 2}), or their combinations as the source of nitrogen ions. Beamline experiments have shown the hardness of the N-implanted surface saturates at a dose level of {approximately} 4 {times} 10{sup 17} at/cm{sup 2} at {approximately} 10 GPa. The present work makes comparisons of hardness and tribological tests of (1) B implantation using beamline techniques, and (2) N implanted samples using ammonia and/or nitrogen gas in a PSII process. The results show that PSII using N{sub 2} or NH{sub 3} gives similar hardness as N implantation using a beamline process. The presence of H in the Ti alloy surface does not affect the hardness of the implanted surface. Boron implantation increased the surface hardness by as much as 2.5x at the highest dose level. Wear testing by a pin-on-disk method indicated that nitrogen implantation reduced the wear rate by as much as 120x, and boron implantation reduced the wear rate by 6.5x. Increased wear resistance was accompanied by a decreased coefficient of friction.

Walter, K.C.; Woodring, J.S.; Nastasi, M.; Munson, C.M. [Los Alamos National Lab., NM (United States); Williams, J.M.; Poker, D.B. [Oak Ridge National Lab., TN (United States). Solid State Div.

1996-12-31T23:59:59.000Z

89

Computer simulation of sputtering at the low index (1 0 0), (1 1 0) and (1 1 1) surfaces of Ni3Al in a STEM  

Science Conference Proceedings (OSTI)

The present study is relevant to the preferential Al sputtering and/or enhancement of the Ni/Al ratio in Ni3Al observed by the scanning transmission electron microscopy fitted with a field emission gun (FEG STEM). Atomic recoil events at the low index (1 0 0), (1 1 0) and (1 1 1) surfaces of Ni3Al through elastic collisions between electrons and atoms are simulated using molecular dynamics (MD) methods. The threshold energy for sputtering, Esp, and adatom creation, Ead, are determined as a function of recoil direction. Based on the MD determined Esp, the sputtering cross-sections for Ni and Al atoms in these surfaces are calculated with the previous proposed model. It is found that the sputtering cross-section for Al atoms is about 7–8 times higher than that for Ni, indicating the preferential sputtering of Al in Ni3Al, in good agreement with experiments. It is also found that the sputtering cross-sections for Ni atoms are almost the same in these three surfaces, suggesting that they are independent of surface orientation. Thus, the sputtering process is almost independent of the surface orientation in Ni3Al, as it is controlled by the sputtering of Ni atoms with a lower sputtering rate.

Lai, Wenshen; Yu, J. J.; Gao, Fei; Bacon, David J.

2009-09-15T23:59:59.000Z

90

Switchable Induced Polarization in LaAlO3/SrTiO3 Heterostructures  

SciTech Connect

Demonstration of a tunable conductivity of the LaAlO3/SrTiO3 interfaces drew significant attention to the development of oxide electronic structures where electronic confinement can be reduced to the nanometer range. While the mechanisms for the conductivity modulation are quite different and include metal insulator phase transition and surface charge writing, generally it is implied that this effect is a result of electrical modification of the LaAlO3 surface (either due to electrochemical dissociation of surface adsorbates or free charge deposition) leading to the change in the twodimensional electron gas (2DEG) density at the LaAlO3/SrTiO3 (LAO/STO) interface. In this paper, using piezoresponse force microscopy we demonstrate a switchable electromechanical response of the LAO overlayer, which we attribute to the motion of oxygen vacancies through the LAO layer thickness. These electrically induced reversible changes in bulk stoichiometry of the LAO layer are a signature of a possible additional mechanism for nanoscale oxide 2DEG control on LAO/STO interfaces.

Bark, C [University of Wisconsin, Madison; Sharma, P. [University of Nebraska; Wang, Y. [University of Nebraska; Baek, Seung Hyub [University of Wisconsin, Madison; Lee, S. [University of Wisconsin, Madison; Ryu, S. [University of Wisconsin, Madison; Folkman, C H [University of Wisconsin; Paudel, Tula R [ORNL; Kumar, Amit [ORNL; Kalinin, Sergei V [ORNL; Sokolov, A. [University of Nebraska; Tsymbal, E Y [University of Nebraska, Lincoln; Rzchowski, M [University of Wisconsin; Gruverman, Alexei [ORNL; Eom, Professor Chang-Beom [University of Wisconsin, Madison

2012-01-01T23:59:59.000Z

91

High-Temperature Galling Characteristics of Ti-6Al-4V with and without Surface Treatments  

SciTech Connect

Galling is a severe form of surface damage in metals and alloys that typically arises under relatively high normal force, low-sliding speed, and in the absence of effective lubrication. It can lead to macroscopic surface roughening and seizure. The occurrence of galling can be especially problematic in high-temperature applications like diesel engine exhaust gas recirculation system components and adjustable turbocharger vanes, because suitable lubricants may not be available, moisture desorption promotes increased adhesion, and the yield strength of metals decreases with temperature. Oxidation can counteract these effects to some extent by forming lubricative oxide films. Two methods to improve the galling resistance of titanium alloy Ti-6Al-4V were investigated: (a) applying an oxygen diffusion treatment, and (b) creating a metal-matrix composite with TiB2 using a high-intensity infrared heating source. A new, oscillating three-pin-on-flat, high-temperature test method was developed and used to characterize galling behavior relative to a cobalt-based alloy (Stellite 6B ). The magnitude of the oscillating torque, the surface roughness, and observations of surface damage were used as measures of galling resistance. Owing to the formation of lubricative oxide films, the galling resistance of the Ti-alloy at 485o C, even non-treated, was considerably better than it was at room temperature. The IR-formed composite displayed reduced surface damage and lower torque than the substrate titanium alloy.

Blau, Peter Julian [ORNL; ERDMAN III, DONALD L [ORNL; Ohriner, Evan Keith [ORNL; Jolly, Brian C [ORNL

2011-01-01T23:59:59.000Z

92

REVERSIBLE AND IRREVERSIBLE PASSIVATION OF A LA-NI-AL ALLOY  

DOE Green Energy (OSTI)

This paper seeks to explore some of the effects of passivating a LaNi{sub 4.25}Al{sub 0.75} sample by air oxidation under controlled conditions. Passivation of this metal hydride alloy seems to have two distinct regimes. The first occurs with air oxidation at 80 C and 20 C. It is characterized by complete reversibility upon hydrogen readsorption, although said readsorption is hindered substantially at room temperature, requiring the material to be heated to produce the reactivation. The second regime is illustrated by 130 C air oxidation and is characterized by irreversible loss of hydrogen absorption capacity. This passivation does not hinder hydrogen readsorption into the remaining hydride material.

Shanahan, K.; Klein, J.

2009-06-25T23:59:59.000Z

93

Xe films on a decagonal Al-Ni-Co quasicrystal surface  

E-Print Network (OSTI)

The grand canonical Monte Carlo method is employed to study the adsorption of Xe on a quasicrystalline Al-Ni-Co surface. The calculation uses a semiempirical gas-surface interaction, based on conventional combining rules and the usual Lennard-Jones Xe-Xe interaction. The resulting adsorption isotherms and calculated structures are consistent with the results of LEED experimental data. In this paper we focus on five features not discussed earlier (Phys. Rev. Lett. 95, 136104 (2005)): the range of the average density of the adsorbate, the order of the transition, the orientational degeneracy of the ground state, the isosteric heat of adsorption of the system, and the effect of the vertical cell dimension.

Wahyu Setyawan; Nicola Ferralis; Renee D. Diehl; Milton W. Cole; Stefano Curtarolo

2006-08-08T23:59:59.000Z

94

Fabrication of Engineered TiNi Matrix Composites with Near-Zero ...  

Science Conference Proceedings (OSTI)

Functional Composites: Fluorescent Carbon Nanotubes in Silica Aerogel ... Novel Metallo-Organic Derived Ti-Si-Cr-C-N Nanocomposite Coatings: Part II ...

95

Dynamic fracture behavior of Ti-6Al-4V alloy with various stabilities of [beta] phase  

Science Conference Proceedings (OSTI)

The effect of stability of the body-centered cubic (bcc) [beta] phase on the dynamic fracture behavior of Ti-6Al-4V alloy at room temperature and 77 K has been studied. The presence of a highly unstable [beta] phase in the quenched alloy leads to a decrease in both the dynamic fracture toughness and the crack propagation energy, and this decrease becomes more pronounced when test temperature is reduced to 77 K. Somewhat improved fracture characteristics were obtained by applying anneal procedure to receive a fully stable [beta] phase. The highest fracture toughness as well as the greatest crack propagation resistance were observed in the air-cooled grade, where the lattice parameter of the bcc phase was intermediate between those pertaining to quenched and annealed Ti-6Al-4V alloys. The effect is attributed to the vanadium content in the [beta] phase, which is sufficiently high to suppress deformation-induced transformation. On the other hand, the V content should be low enough to retard ductile-brittle transition, typical for the bcc metals at cryogenic temperatures. As a result, marked toughening can be achieved, so that the lowest application temperature of high-strength titanium alloys containing the bcc phase can be decreased significantly.

Akmoulin, I.A.; Niinomi, M.; Kobayashi, T. (Toyohashi Univ. of Technology (Japan). Dept. of Production Systems Engineering)

1994-08-01T23:59:59.000Z

96

Hydrogen-Rich Gas Production from Steam Gasification of Palm Oil Wastes Using the Supported Nano-NiO/?-Al2O3 Catalyst  

Science Conference Proceedings (OSTI)

The catalytic steam gasification of palm oil wastes for hydrogen-rich gas production was experimentally investigated in a combined fixed bed reactor using the newly developed nano-NiO/?-Al2O3 catalyst. The results indicated that the nano-NiO/?-Al2O3 ... Keywords: Biomass gasification, palm oil waste, catalyst, hydrogen production

Jianfen Li; Yanfang Yin; Jianjun Liu; Rong Yan

2009-10-01T23:59:59.000Z

97

Microstructures and mechanical properties of electron beam-rapid manufactured Ti-6Al-4V biomedical prototypes compared to wrought Ti-6Al-4V  

Science Conference Proceedings (OSTI)

This study represents an exploratory characterization and comparison of electron-beam melted (EBM) or rapid manufacturing (RM) of Ti-6Al-4V components (from nominal 30 {mu}m diameter powder) with wrought products. Acicular {alpha} and associated {beta} microstructures observed by optical metallography and electron microscopy (SEM and TEM) are compared along with corresponding tensile test and hardness data; including the initial powder particles where the Vickers microindentation hardness averaged 5.0 GPa in comparison with the fully dense, EB manufactured product with an average microindentation hardness ranging from 3.6 to 3.9 GPa. This compared with wrought products where the Vickers microindentation hardness averaged 4.0 GPa. Values of UTS for the EBM samples averaged 1.18 GPa for elongations ranging from 16 to 25%. Biomaterials/biomedical applications of EBM prototypes in direct prosthesis or implant manufacturing from CT or MRI data are discussed in the context of this work, especially prospects for tailoring physical properties through EB control to achieve customized and optimized implant and prosthetic products direct from CT-scans.

Murr, L.E. [Department of Metallurgical and Materials Engineering, University of Texas at El Paso, El Paso, TX 79968 (United States)], E-mail: fekberg@utep.edu; Esquivel, E.V. [Department of Metallurgical and Materials Engineering, University of Texas at El Paso, El Paso, TX 79968 (United States); Quinones, S.A. [Department of Electrical and Computer Engineering and Keck Center for 3-D Innovation, University of Texas at El Paso, El Paso, TX 79968 (United States); Gaytan, S.M.; Lopez, M.I.; Martinez, E.Y. [Department of Metallurgical and Materials Engineering, University of Texas at El Paso, El Paso, TX 79968 (United States); Medina, F. [Department of Mechanical Engineering and Keck Center for 3-D Innovation, University of Texas at El Paso, El Paso, TX 79968 (United States); Hernandez, D.H.; Martinez, E.; Martinez, J.L.; Stafford, S.W.; Brown, D.K. [Department of Metallurgical and Materials Engineering, University of Texas at El Paso, El Paso, TX 79968 (United States); Hoppe, T.; Meyers, W. [Stratasys, Eden Prairie, MN 55344 (United States); Lindhe, U. [Arcam AB, Moelndal (Sweden); Wicker, R.B. [Department of Mechanical Engineering and Keck Center for 3-D Innovation, University of Texas at El Paso, El Paso, TX 79968 (United States)

2009-02-15T23:59:59.000Z

98

Aging effects in palladium and LaNi{sub 4.25}Al{sub 0.75} tritides  

DOE Green Energy (OSTI)

Palladium and LaNi{sub 5-x}Al{sub x} (x=0.30, 0.75, 0.85), which form reversible hydrides, are used for tritium processing and storage in the Savannah River Site (SRS) tritium facilities. As part of a program to develop technology based on the use of reversible metal hydrides for tritium processing and storage, the effects of aging on the thermodynamic behavior of palladium and LaNi{sub 4.25}Al{sub 0. 75} tritides are under investigation. During aging, the {sup 3}He tritium decay product remains in the tritide lattice and changes the thermodynamics of the tritium-metal tritide system. Aging effects in 755-day-aged palladium and 1423-day-aged LaNi{sub 4.25}Al{sub 0.75} tritides will be reported. Changes in the thermodynamics were determined by measuring tritium desorption isotherms on aging samples. In palladium, aging decreases the desorption isotherm plateau pressure and changes the {alpha}-phase portion of the isotherm. Aging-induced changes in desorption isotherms are more drastic in LaNi{sub 4.25}Al{sub 0.75}. Among the changes noted are: (1) decreased isotherm plateau pressure, (2) increased isotherm plateau slope, and (3) appearance of deep-trapped tritium, removable only by exchange with deuterium.

Nobile, A.; Wermer, J.R.; Walters, R.T.

1991-12-31T23:59:59.000Z

99

Microstructural characterization and mechanical property of active soldering anodized 6061 Al alloy using Sn-3.5Ag-xTi active solders  

SciTech Connect

Active solders Sn-3.5Ag-xTi varied from x = 0 to 6 wt.% Ti addition were prepared by vacuum arc re-melting and the resultant phase formation and variation of microstructure with titanium concentration were analyzed using X-ray diffraction, optical microscopy and scanning electron microscopy. The Sn-3.5Ag-xTi active solders are used as metallic filler to join with anodized 6061 Al alloy for potential applications of providing a higher heat conduction path. Their joints and mechanical properties were characterized and evaluated in terms of titanium content. The mechanical property of joints was measured by shear testing. The joint strength was very dependent on the titanium content. Solder with a 0.5 wt.% Ti addition can successfully wet and bond to the anodized aluminum oxide layers of Al alloy and posses a shear strength of 16.28 {+-} 0.64 MPa. The maximum bonding strength reached 22.24 {+-} 0.70 MPa at a 3 wt.% Ti addition. Interfacial reaction phase and chemical composition were identified by a transmission electron microscope with energy dispersive spectrometer. Results showed that the Ti element reacts with anodized aluminum oxide to form Al{sub 3}Ti-rich and Al{sub 3}Ti phases at the joint interfaces. - Highlights: Black-Right-Pointing-Pointer Active solder joining of anodized Al alloy needs 0.5 wt.% Ti addition for Sn-3.5Ag. Black-Right-Pointing-Pointer The maximum bonding strength occurs at 3 wt.% Ti addition. Black-Right-Pointing-Pointer The Ti reacts with anodized Al oxide to form Al{sub 3}Ti-rich and Al{sub 3}Ti at joint interface.

Wang, Wei-Lin, E-mail: wangwl77@gmail.com; Tsai, Yi-Chia, E-mail: tij@itri.org.tw

2012-06-15T23:59:59.000Z

100

Low Energy Sputtering Events at Free Surfaces near Anti-Phase and Grain Boundaries in Ni3Al  

Science Conference Proceedings (OSTI)

Atomic recoil events on free surfaces orthogonal to two different anti-phase boundaries (APBs) and two grain boundaries (GBs) in Ni3Al are simulated using molecular dynamics methods. The threshold energy for sputtering, Esp, and adatom creation, Ead, are determined as a function of recoil direction. The study is relevant to FEG STEM experiments on preferential Al sputtering and/or enhancement of the Ni-Al ratio near boundaries. Surfaces intersected by {l_brace}110{r_brace} and {l_brace}111{r_brace} APBs have minimum Esp of 6.5 eV for an Al atom on the Ni-Al mixed (M) surface, which is close to the value of 6.0 eV for a perfect M surface. High values of Esp of an Al atom generally occur at large angle to the surface normal and depend strongly on the detailed atomic configuration of the surface. The mean Esp averaged over all recoil directions reveals that APBs have a small effect on the threshold sputtering. However, the results for Ead imply that an electron beam could create more Al adatoms on surfaces intersected by APBs than on those without. The equilibrium, minimum energy structures for a (001) surface intersected by either Sigma5[001](210) or Sigma25[001](340) symmetric tilt grain boundaries are computed. Esp for surface Al atoms near these GBs increases monotonically with increasing recoil angle to the surface normal, with a minimum value which is only about 1 eV different from that obtained for a perfect surface. Temperature up to 300 K has no effect on this result. It is concluded that the experimental observations of preferential sputtering are due to effects beyond those for Esp studied here. Possible reasons for this are discussed.

Gao, Fei; Bacon, David J.; Lai, Wenshen; Kurtz, Richard J.

2006-09-21T23:59:59.000Z

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101

The investigation of die-pressing and sintering behavior of ITP CP-Ti and Ti-6Al-4V powders  

SciTech Connect

This paper investigated the die-pressing and sintering behavior of the low-cost CP-Ti and Ti-6Al- 4V powders made by the Armstrong Process . The Armstrong powders have an irregular coral like, dendritic morphology, with a dendrite size of approximately 2-5 m. As-received as well as milled powders were uniaxially pressed at designated pressures up to 690 MPa to form disk samples with different aspect ratios. In the studied pressure range, an empirical powder compaction equation was applied to linearize the green density pressure relationship, and powder compaction parameters were obtained. The Armstrong Ti-64 powder exhibited a significantly higher sinterability than the CP-Ti powder. This was explained to be due to the higher diffusivity of V at the sintering temperature. The Ti-64 samples with a green density of 71.0% increased to 99.6% after sintering at 1300oC for 1 hour. An ex-situ technique was used to track the powder morphology change before and after sintering.

Chen, Wei [ORNL; Yamamoto, Yukinori [ORNL; Peter, William H [ORNL; Clark, Michael B [ORNL; Nunn, Stephen D [ORNL; Kiggans, Jim [ORNL; Muth, Thomas R [ORNL; Blue, Craig A [ORNL; Williams, James C [Ohio State University; Fuller, Brian [International Titanium Powder; Akhtar, Kamal [International Titanium Powder

2012-01-01T23:59:59.000Z

102

Atomistic modeling of ultra-thin surface oxide growth on a ternary alloy : oxidation of Al-Ni-Fe.  

Science Conference Proceedings (OSTI)

By employing variable-charge molecular dynamics, surface oxide film growth on aluminum-nickel-iron alloys has been studied at 300 and 600 K. The dynamics of oxidation and oxide growth is strongly dependent on the composition of the initial alloy and the ambient temperature. Higher content of Ni and Fe in Al alloys is found to reduce the oxide growth kinetics; 15% Ni + 15% Fe Al alloy yielded 30-40% less growth at 400 ps oxygen exposure compared to pure Al. We observe dopant segregation, which disrupts the interaction between O atoms and Al atoms in the alloy, leading to a nonlinear oxide growth profile in the case of ternary Al-Ni-Fe alloy. Compared to oxidation at 300 K, 30% more oxide layer was yielded at 600 K, due to the elevated temperature. The simulated oxide kinetics indicates that the growth rate of anion surpasses the cation rate with higher sensitivity to the stoichiometry of the base metal substrate. Charge state analysis provides insights into the evolution of cation and anion species as the oxide layer grows. In particular, due to higher correlation, Fe shows a high rate of oxidation when the content is high, whereas the rate of Ni oxidation is consistently low. Density profile analysis suggests the segregation of dopant atoms below the growing ultrathin oxide layer, showing the presence of a layer-by-layer mode of oxide layer even with disordered structure. Coordination number (Z, the number of oxygen atoms around an aluminum atom) of aluminum oxide has been used to identify how the initial oxidation transitions into equilibrated states. Z = 3 is dominant in the early stages of oxidation and at the interface between oxide and bulk substrate, but it transitions quickly to Z = 4 (45%) and 5 (35%) as the oxide equilibrates and approaches its self-limiting thickness. Even though growth kinetics is dependent on the base metal stoichiometry, the composition of the oxide microstructure is not significantly affected, primarily segregating dopant elements, i.e., Ni and Fe outside of the oxide layer.

Byoungseon, J.; Sankaranarayanan, S. K. R. S.; Ramanathan, S. (Center for Nanoscale Materials); (Harvard Univ.)

2011-04-14T23:59:59.000Z

103

Thermal Stability Study on a New Ni-Cr-Co-Mo-Nb-Ti-Al Superalloy  

Science Conference Proceedings (OSTI)

superalloy for advanced ultra-supercritical boiler tubes is under development ... pressure and temperature of their pulverized coal-fired boilers so as to improve ...

104

Photoconductivity and Non-Exponential Relaxation at Insulating LaAlO3/SrTiO3 Interfaces  

SciTech Connect

LaAlO{sub 3} is grown on SrO terminated (100) SrTiO{sub 3}, and (110) SrTiO{sub 3}, producing insulating heterointerfaces without light. Photocurrent spectroscopy at low temperatures reveals a broad distribution of interface states between 2 eV and 2.7 eV at both interfaces, with a higher density in the (110) case concomitant with relatively shallow traps. The photocurrent relaxation can be well fitted by a stretched exponential form, confirming energetically distributed electron traps. Photo-carrier lifetimes are larger than a few hundred seconds for optical excitation approaching the SrTiO{sub 3} band-gap energy, providing the opportunity to study transient light-induced properties at low temperatures.

Kim, Minu; Bell, C.; Hikita, Y.; Kozuka, Y.; Kim, B.G.; Hwang, H.Y.

2012-08-17T23:59:59.000Z

105

Compression testing of a sintered Ti6Al4V powder compact for biomedical applications  

Science Conference Proceedings (OSTI)

In this study, the compression deformation behavior of a Ti6Al4V powder compact, prepared by the sintering of cold compacted atomized spherical particles (100-200 {mu}m) and containing 36-38% porosity, was investigated at quasi-static (1.6x10{sup -3}-1.6x10{sup -1} s{sup -1}) and high strain rates (300 and 900 s{sup -1}) using, respectively, conventional mechanical testing and Split Hopkinson Pressure Bar techniques. Microscopic studies of as-received powder and sintered powder compact showed that sintering at high temperature (1200 deg. C) and subsequent slow rate of cooling in the furnace changed the microstructure of powder from the acicular alpha ({alpha}) to the Widmanstaetten ({alpha}+{beta}) microstructure. In compression testing, at both quasi-static and high strain rates, the compact failed via shear bands formed along the diagonal axis, 45 deg. to the loading direction. Increasing the strain rate was found to increase both the flow stress and compressive strength of the compact but it did not affect the critical strain for shear localization. Microscopic analyses of failed samples and deformed but not failed samples of the compact further showed that fracture occurred in a ductile (dimpled) mode consisting of void initiation and growth in {alpha} phase and/or at the {alpha}/{beta} interface and macrocracking by void coalescence in the interparticle bond region.

Guden, M. [Department of Mechanical Engineering, Izmir Institute of Technology, Gulbahce Koyu, Urla, Izmir (Turkey); Center for Materials Research, Izmir Institute of Technology, Gulbahce Koyu, Urla, Izmir (Turkey); E-mail: mustafaguden@iyte.edu.tr; Celik, E. [Materials Science and Engineering Program, Izmir Institute of Technology, Gulbahce Koyu, Urla, Izmir (Turkey); Akar, E. [Department of Mechanical Engineering, Izmir Institute of Technology, Gulbahce Koyu, Urla, Izmir (Turkey); Cetiner, S. [Hipokrat A.S., 407/6 Sok., No:10, Pinarbasi, Izmir (Turkey)

2005-05-15T23:59:59.000Z

106

The Role of Al on the Thermodynamics of Hydrogen Absorption/Desorption by Some Ternary Pd-M-Al Alloys where M=Rh, Ni, Pt, Cr, Ag.  

DOE Green Energy (OSTI)

The solution of hydrogen and hydride formation in FCC substitutional solid solution Pd0.9Rh0.1-xAlx alloys have been examined. In contrast to some other Pd ternary alloys, a linear relation does not obtain between the H capacity and x for the Pd0.9Rh0.1-xAlx alloys investigated here where the H capacity of the alloys is estimated from the H content of the steeply rising part of the isotherms in the hydride phase regions. A linear increase of the dilute phase H solubility with x for these Pd0.9Rh0.1-xAlx alloys does, however, obtain for these alloys. Although Pd-Rh binary alloys have broader plateaux than does Pd itself, small amounts of Al substituted into Pd0.85Rh0.15 or Pd0.80Rh0.20 alloys can reduce or eliminate the two phase regions, the plateaux; there is, however, not much effect on the dilute phase solubilities. For example, small amounts of Al substituted into the Pd0.85Rh0.15 or Pd0.80Rh0.20 alloys eliminate the plateaux. On the other hand, alloying Pd with Al to form binary alloys with Xal equals 0.015 or 0.030 does not eliminate the plateaux which are present in these binary alloys up to Xal equals 0.075 (298 K). Small amounts of Al substitution do not have such a dramatic effect on the plateau widths of the Pd0.90Ni0.10 and Pd0.80Ni0.20 alloys and similarly substitution of Al into Pd-Cr and Pd-Ag alloys does not introduce any anomalous effects into the isotherms.

Shanahan, K.L.

2002-04-10T23:59:59.000Z

107

Production of 26Al, 44Ti and 60Fe in Supernovae-sensitivity to the helium burning rates  

E-Print Network (OSTI)

We have studied the sensitivity of supernova production of the gamma emitting nuclei 26Al, 44Ti and 60Fe to variations of the rates of the triple alpha and 12C(alpha, gamma) reactions. Over a range of twice their experimental uncertainties we find variations in the production of 60Fe by more than a factor of five. Smaller variations, about a factor of two to three, were observed for 26Al and 44Ti. The yields of these isotopes change significantly when the abundances of Lodders (2003) are used instead of those of Anders and Grevesse (1989). These sensitivities will limit conclusions based on a comparison of observed gamma ray intensities and stellar models until the helium burning rates are better known. Prospects for improving the helium burning rates are discussed and a new version of the Boyes rate for 12C(alpha, gamma} is presented.

Clarisse Tur; Alexander Heger; Sam M. Austin

2010-12-21T23:59:59.000Z

108

Mechanisms Associated with Rumpling of Pt-Modified Beta-NiAl Coatings  

SciTech Connect

The formation of surface undulations (i.e. rumpling) at the bond coat/thermally grown oxide (TGO) interface has been shown to cause failure by spallation of the ceramic top coat in aero-turbine systems. Many mechanisms have been proposed concerning the cause of these surface distortions; however, there is little agreement on what may be the dominating cause of the rumpling behavior. Of there mechanisms, the reversible phase transformation from a cubic {beta}-NiAl structure to a face centered tetragonal (FCT) martensitic phase was of particular interest because of its ability to form surface rumpling in Pt-modified {beta} bulk alloys. However, the bulk alloys used in obtaining that result were simple ternary systems and not relevant to actual coating compositions as other alloying elements enter the coating due to coating/substrate interdiffusion at high temperature. In the current study, the depletion behavior of a commercial coating was studied. Compositions from the depletion path were determined and bulk alloys representing these coating compositions were prepared. The martensitic phase transformation was then characterized using DSC and XRD. The martensitic start temperature on cooling, Ms, was consistently found to be significantly lower than previously reported values (e.g. 530 C vs 100 C). Because of the low Ms temperature, the formation of the martensitic phase was concluded to be unnecessary for the occurrence of rumpling. However, cyclic exposure treatments at low temperature ({approx} 400 C) of bulk alloys and commercial coatings did show the detrimental effects of the phase transformation in the form of crack formation and propagation leading to eventual failure of the alloys. The current work also infers that the differences in coefficient of thermal expansion (CTE) mismatch between the coating and substrate are the dominating factor leading to rumpling. Dilatometry measurements were made on bulk alloys representing depleted coatings and the superalloy substrate to determine CTE as a function of temperature. Finally, simulations were completed to help determine the role of CTE mismatch. It was found that these results compared closely to those collected during experimental cyclic exposure treatments; although, modification to the current model were found to be needed in order to truly simulate rumpling.

Joseph Peter Henderkott

2007-12-01T23:59:59.000Z

109

Prediction of material removal rate for Ti-5Al-2.5Sn in EDM using multi-layered perceptron neural network technique  

Science Conference Proceedings (OSTI)

Extensive work has been reported on modelling and optimization for different materials such as aluminum, iron, nickel-base alloy, C40 steel, mild steel, Ti6Al4V, HE15, 15CDV6, M-250, AISI D2 steel material etc. However model of process parameters for ... Keywords: EDM, Ti-5Al-2.5Sn, artificial neural network, material removal rate, multi layer perceptron

M. M. Rahman; Md. Ashikur Rahman Khan; K. Kadirgama; Rosli A. Bakar

2011-04-01T23:59:59.000Z

110

The elevated-temperature mechanical behavior of as-cast and wrought Ti-6Al-4V-1B  

Science Conference Proceedings (OSTI)

This work studied the effect of processing on the elevated-temperature [728 K (455 C)] fatigue deformation behavior of Ti-6Al-4V-1B for maximum applied stresses between 300 to 700 MPa (R = 0.1, 5 Hz). The alloy was evaluated in the as-cast form as well as in three wrought forms: cast-and-extruded, powder metallurgy (PM) rolled, and PM extruded. Processing caused significant differences in the microstructure, which in turn impacted the fatigue properties. The PM-extruded material exhibited a fine equiaxed {alpha} + {beta} microstructure and the greatest fatigue resistance among all the studied materials. The {beta}-phase field extrusion followed by cooling resulted in a strong {alpha}-phase texture in which the basal plane was predominately oriented perpendicular to the extrusion axis. The TiB whiskers were also aligned in the extrusion direction. The {alpha}-phase texture in the extrusions resulted in tensile-strength anisotropy. The tensile strength in the transverse orientation was lower than that in the longitudinal orientation, but the strength in the transverse orientation remained greater than that for the as-cast Ti-6Al-4V. The ratcheting behavior during fatigue is also discussed.

Chen, Wei [ORNL; Boehlert, C. J. [Michigan State University, East Lansing; Howe, Jane Y [ORNL; Payzant, E Andrew [ORNL

2011-01-01T23:59:59.000Z

111

Effects of Processing Parameters on Macrozone Formation in Ti-6Al ...  

Science Conference Proceedings (OSTI)

Composition Design of Multi-Component ?-Ti Alloys Based on a Cluster Model · Consolidation of Blended Titanium/Magnesium Powders by Microwave Processing ... Rheological Properties of Feedstock Composed of Titanium Alloy Powder ...

112

Neutron study and modeling of the lattice parameters in a NiAl-precipitate strengthened ferritic steel  

Science Conference Proceedings (OSTI)

The lattice misfit between the body-centered cubic {alpha}-Fe matrix and the B2-ordered NiAl-type {beta}{prime} precipitates is a parameter of significant importance in controlling the creep resistance of precipitate-strengthened ferritic steels. However, the measurement of the lattice misfit is complicated due to the fact that the fundamental reflections of {alpha} and {beta}{prime} phases almost completely overlap. In this study, neutron diffraction is used to determine the lattice parameters of these two phases in a Fe-18.9 Al-9.8 Cr-13 Ni-1.8 Mo (atomic percent, at.%) alloy as a function of temperature. The accuracy of the measurement at room temperature is verified by high-energy synchrotron X-ray diffraction. The comparison between these two techniques is discussed in terms of the difference in superlattice intensity. Furthermore, using the phase compositions determined by atom probe tomography, models are proposed to predict the lattice parameters of both phases at room temperature as a function of their compositions. The results are in very good agreement with those obtained experimentally.

Teng, Zhenke [ORNL; Ghosh, Gautam [Northwestern University, Evanston; Miller, Michael K [ORNL; Huang, Shenyan [ORNL; Clausen, B [Los Alamos National Laboratory (LANL); Brown, D.W. [Los Alamos National Laboratory (LANL); Liaw, Peter K [University of Tennessee, Knoxville (UTK)

2012-01-01T23:59:59.000Z

113

XRD and NMR investigation of Ti-compound formation in solution-doping of sodium aluminum hydrides: Solubility of Ti in NaAlH4 crystals grown in THF  

DOE Green Energy (OSTI)

Sodium aluminum hydrides have gained attention due to their high hydrogen weight percent (5.5% ideal) compared to interstitial hydrides, and as a model for hydrides with even higher hydrogen weight fraction. The purpose of this paper is to investigate the Ti-compounds that are formed under solution-doping techniques, such as wet doping in solvents such as tetrahydrofuran (THF). Compound formation in Ti-doped sodium aluminum hydrides is investigated using x-ray diffraction (XRD) and magic angle spinning (MAS) nuclear magnetic resonance (NMR). We present lattice parameter measurements of crushed single crystals, which were exposed to Ti during growth. Rietveld refinements indicate no lattice parameter change and thus no solubility for Ti in NaAlH{sub 4} by this method of exposure. In addition, x-ray diffraction data indicate that no Ti substitutes in NaH, the final decomposition product for the alanate. Reaction products of completely reacted (33.3 at. %-doped) samples that were solvent-mixed or mechanically milled are investigated. Formation of TiAl{sub 3} is observed in mechanically milled materials, but not solution mixed samples, where bonding to THF likely stabilizes Ti-based nano-clusters. The Ti in these clusters is activated by mechanical milling.

Majzoub, E H; Herberg, J L; Stumpf, R; Spangler, S; Maxwell, R S

2004-08-26T23:59:59.000Z

114

Demonstration of High Efficiency Elastocaloric Cooling with Large Delta- T Using NiTi Wires  

Science Conference Proceedings (OSTI)

Vapor compression (VC) is by far the most dominant technology for meeting all cooling and refrigeration needs around the world. It is a mature technology with the efficiency of modern compressors approaching the theoretical limit, but its envi-ronmental footprint remains a global problem. VC refrigerants such as hydrochlo-roflurocarbons (HCFCs) and hydrofluorocarbons (HFCs) are a significant source of green house gas (GHG) emissions, and their global warming potential (GWP) is as high as 1000 times that of CO2. It is expected that building space cooling and re-frigeration alone will amount to {approx} 5% of primary energy consumption and {approx}5% of all CO2 emission in U.S. in 2030 . As such, there is an urgent need to develop an al-ternative high-efficiency cooling technology that is affordable and environmentally friendly. Among the proposed candidates, magnetocaloric cooling (MC) is currently received a lot of attention because of its high efficiency. However, MC is inherently expensive because of the requirement of large magnetic field and rare earth materi-als. Here, we demonstrate an entirely new type of solid-state cooling mechanism based on the latent heat of reversible martensitic transformation. We call it elasto-caloric cooling (EC) after the superelastic transformation of austenite it utilizes. The solid-state refrigerant of EC is cost-effective, and it completely eliminates the use of any refrigerants including HCFCs/HFCs. We show that the COP (coefficient of per-formance) of a jugular EC with optimized materials can be as high as > 10 with measured {Delta}T of 17 C.

Cui, Jun; Wu, Yiming; Muehlbauer, Jan; Hwang, Yunho; Radermacher, Reinhard; Fackler, Sean; Wuttig, Manfred; Takeuchi, Ichiro

2012-08-01T23:59:59.000Z

115

Ductile-reinforcement toughening in [gamma]-TiAl intermetallic-matrix composites: Effects on fracture toughness and fatigue-crack propagation resistance  

Science Conference Proceedings (OSTI)

The influence of the type, volume fraction, thickness and orientation of ductile phase reinforcements on the room temperature fatigue and fracture resistance of [gamma]-TiAl intermetallic alloys is investigated. Large improvements in toughness compared to monolithic [gamma]-TiAl are observed in both the TiNb- and Nb-reinforced composites under monotonic loading. Toughness increases with increasing ductile phase content, reinforcement thickness and strength; orientation effect are minimal. Crack-growth behavior is characterized by steep resistance curves primarily due to crack trapping/renucleation and extensive crack bridging by the ductile-phase particles. In contrast, under cyclic loading the influence of ductile phases on fatigue resistance is strongly dependent upon reinforcement orientation. Compared to monolithic [gamma]-TiAl, improvements in fatigue-crack growth resistance are observed in TiNb-reinforced composites only in the face (C-L) orientation; crack-growth rates for the edge (C-R) orientation are actually faster in the composite. In comparison, Nb-particle reinforcements offer less toughening under monotonic loading but enhance the fatigue properties compared to TiNb reinforcements under cyclic loading.

Venkateswara Rao, K.T.; Ritchie, R.O. (Univ. of California, Berkeley (United States). Dept. of Materials Science and Mineral Engineering); Odette, G.R. (Univ. of California, Santa Barbara (United States). Materials Dept.)

1994-03-01T23:59:59.000Z

116

Simply AlF3-treated Li4Ti5O12 composite anode materials for stable and ultrahigh power lithium-ion batteries  

SciTech Connect

The commercial Li4Ti5O12 (LTO) is successfully modified by AlF3 via a low temperature process. After being calcined at 400oC for 5 hours, AlF3 reacts with LTO to form a composite material which mainly consists of Al3+ and F- co-doped LTO with small amounts of anatase TiO2 and Li3AlF6. Al3+ and F- co-doped LTO demonstrates largely improved rate capability comparing to the pristine LTO. Since the amount of the byproduct TiO2 is relatively small, the modified LTO electrodes retain the main voltage characteristics of LTO with a minor feature similar to those of anatase TiO2. The doped LTO anodes deliver higher discharge capacity and significantly improved high-rate performance when compared to the pristine LTO anode. They also demonstrate excellent long-term cycling stability at elevated temperatures. Therefore, Al3+ and F- co-doped LTO synthesized at low temperature is an excellent anode for stable and ultra-high power lithium-ion batteries.

Xu, Wu; Chen, Xilin; Wang, Wei; Choi, Daiwon; Ding, Fei; Zheng, Jianming; Nie, Zimin; Choi, Young Joon; Zhang, Jiguang; Yang, Zhenguo

2013-08-15T23:59:59.000Z

117

Investigation of the hydroconversion of rancid lard and lard-gas oil mixture on NiMo/Al2O3 catalyst in oxide and in sulphide state  

Science Conference Proceedings (OSTI)

The necessity to maintain mobility and the increasing energy- and environmentally sound demands necessitated the research, development and utilization of engine fuels from renewable resources. Because of the negative features of the already and generally ... Keywords: NiMo/Al2O3, hydroconversion, hydrogenation, lard, triglyceride

P. Baladincz; J. Hancsók

2011-12-01T23:59:59.000Z

118

Effect of Ti and Ta on the Creep Properties of Single Crystal Co-Al-W ...  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, 2014 TMS Annual Meeting & Exhibition. Symposium , High-temperature Gamma (f.c.c.) /Gamma-Prime (L12 structure) Co-Al-W ...

119

Built-in and Induced Polarization Across LaAlO3/SrTiO3 Heterojunctions  

Science Conference Proceedings (OSTI)

Ionic crystals terminated at oppositely charged polar surfaces are inherently unstable and expected to undergo surface reconstructions to maintain electrostatic stability. Essentially, an electric field that arises between oppositely charged atomic planes gives rise to a built-in potential that diverges with thickness. Here we present evidence of such a built-in potential across polar LaAlO{sub 3} thin films grown on SrTiO{sub 3} substrates, a system well known for the electron gas that forms at the interface. By performing tunneling measurements between the electron gas and metallic electrodes on LaAlO{sub 3} we measure a built-in electric field across LaAlO{sub 3} of 80.1 meV/{angstrom}. Additionally, capacitance measurements reveal the presence of an induced dipole moment across the heterostructure. We forsee use of the ionic built-in potential as an additional tuning parameter in both existing and novel device architectures, especially as atomic control of oxide interfaces gains widespread momentum.

Guneeta, Singh-Bhalla

2011-08-15T23:59:59.000Z

120

Impact toughness Enhancement of an Electron Beam Welded Ti-6Al ...  

Science Conference Proceedings (OSTI)

Aerosol Route Synthesis of Copper Oxide Nanoparticles Using Copper Nitrate Solution · AlGaAs-Based Optical ... Defect Energetics and Fission Product Transport in ZrC ... Enhancing Mineral Beneficiation by High Intensity Power Ultrasound.

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121

Formation mechanism of linear friction welded Ti-6Al-4V alloy joint based on microstructure observation  

Science Conference Proceedings (OSTI)

The microstructure of the linear friction welded Ti-6Al-4V titanium alloy joint was investigated by optical microscope, scanning electronic microscope and transmission electron microscope. Results show that the dynamic recovery and recrystallization resulting from the intensive plastic deformation and fast heating and cooling processes during linear friction welding account for the superfine {alpha} + {beta} grains in the weld center. Fine {alpha} grains distribute in the {beta} matrix or at the boundaries of {beta} grains. A mass of dislocations networks and metastructures present within the {alpha} and {beta} grains. - Research Highlights: {yields} TEM is employed in the analysis. {yields} The dynamic recovery is the main mechanism in thermal deformation of TC4. {yields} Superfine grains in the weld result from dynamic recovery and dynamic recrystallizaion, but the recrystallization is inadequate.

Ma Tiejun; Chen Tao, E-mail: ctwc-13@163.com; Li Wenya; Wang Shiwei; Yang Siqian

2011-01-15T23:59:59.000Z

122

NOIIVUISINII/UQV NOIlVIAIdOdNI AOH3N3 SNOLL33fOHcI AlHHXHVnO  

Gasoline and Diesel Fuel Update (EIA)

NOIIVUISINII/UQV NOIlVIAIdOdNI AOH3N3 NOIIVUISINII/UQV NOIlVIAIdOdNI AOH3N3 SNOLL33fOHcI AlHHXHVnO xoonno AOHHNH T €661 This publication and other Energy Information Administration (EIA) publications may be purchased from the Superintendent of Documents, U.S. Government Printing Office. All telephone orders should be directed to: U.S. Government Printing Office Superintendent of Documents McPherson Square Bookstore U.S. Government Printing Office 1510 H Street, N.W. Washington, DC 20402

123

The influence of hydrogen gas exposure and low temperature on the tribological characteristics of ti-6al-4v  

E-Print Network (OSTI)

This research studies individual and combined effects of hydrogen gas exposure and low temperature on the tribological characteristics of Ti-6Al-4V. Experimental approaches include test system modification and tribological analysis. An existing ballon- disk tribometer was modified to allow liquid nitrogen to be constantly injected into an insulated test chamber to enable testing at low temperature. Twelve 3.8 cm diameter Ti-6Al-4V disks were manufactured and polished, then half were exposed to pure hydrogen gas at elevated temperature and pressure and the remaining disks were untreated. The testing was split in to four groups of three disks based on testing temperature and previous hydrogen exposure. A silicon nitride ball was used for all tests. Each group was tested at two normal loads, 10N and 20N, at the same linear speed. Group 1 was unexposed and tested at room temperature, Group 2 was unexposed and tested at low temperature, Group 3 was exposed and tested at room temperature and Group 4 was exposed and tested at low temperature. Average friction coefficients and the specific wear rate were calculated from the test data. Also high-resolution digital microscope imaging was used to observe and characterize the wear mechanisms of the four groups of samples. Results show that hydrogen exposure facilitated adhesive wear of the surface and that low temperature induced a slip-stick wear mechanism under higher loads, but not at lower loads and regardless of exposure to hydrogen gas. This research opens avenues for future investigation in effects of hydrogen and low temperature embrittlement on the tribological performance of materials. With the increasing interests in hydrogen energy, the present work established a foundation for future study.

Gola, Ryan Travis

2008-12-01T23:59:59.000Z

124

Structural Comparison of n-type and p-type LaAlO3/SrTiO3 Interfaces  

Science Conference Proceedings (OSTI)

Using a surface x-ray diffraction technique, we investigated the atomic structure of two types of interfaces between LaAlO{sub 3} and SrTiO{sub 3}, that is, p-type (SrO/AlO{sub 2}) and n-type (TiO{sub 2}/LaO) interfaces. Our results demonstrate that the SrTiO{sub 3} in the sample with the n-type interface has a large polarized region, while that with the p-type interface has a limited polarized region. In addition, the atomic intermixing was observed to extend deeper into STO substrate at the n-type interface than at the p-type. These differences result in different degrees of band bending, which likely contributes to the striking difference in electrical conductivity between the two types of interfaces.

Bell, Christopher

2011-08-19T23:59:59.000Z

125

Linear surface smoothening of (Ti{sub 0.48}Al{sub 0.52})N thin films grown on rough substrates  

SciTech Connect

The evolution of surface roughness during the growth of sputter-deposited solid solution (Ti{sub 0.48}Al{sub 0.52})N films on rough high-speed-steel (HSS) substrates has been studied by atomic force microscopy. It has been revealed that the growing (Ti{sub 0.48}Al{sub 0.52})N/HSS film experiences a continuous surface smoothening. Scaling analyses along with surface power spectra calculation of the (Ti{sub 0.48}Al{sub 0.52})N films grown on smooth Si(100) substrates under the same deposition conditions indicate that this surface smoothening is linear and can be explained by a simple linear equation with surface diffusion as the smoothening mechanism and shot noise as the roughening effect. The observed linear surface smoothening in (Ti{sub 0.48}Al{sub 0.52})N/HSS films has also been confirmed by our numerical simulations of the film growth using real HSS and Si(100) substrates as their initial growth conditions and can be understood in terms of the competition between the surface-diffusion-induced decrease in substrate roughness contribution and the noise-driven roughening effect.

Liu, Z.-J.; Shum, P.W.; Shen, Y.G. [Department of Manufacturing Engineering and Engineering Management (MEEM), City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong (China)

2005-06-20T23:59:59.000Z

126

Effect of the top electrode materials on the resistive switching characteristics of TiO{sub 2} thin film  

Science Conference Proceedings (OSTI)

Various metals, such as Pt, stainless steel (SUS), Al, Ni, and Ti, were used as a top electrode (TE) to evaluate the dependency of the resistive switching characteristics on the TE of the metal/TiO{sub 2}/Pt structure. The variation of the chemical composition of TiO{sub 2} in the metal/TiO{sub 2}/Pt structure before and after switching was examined to identify the factors affecting the resistive switching characteristics of the samples with various TE materials. In the case of TE/TiO{sub 2}/Pt structures showing unstable resistive switching behavior, e.g., those with the Al, Ni, and Ti TEs, secondary ion mass spectrometry revealed an increase in the oxygen concentration at the interface area between the TE metal and TiO{sub 2}. This suggests that the oxidation reaction at the interface between the TE metal and TiO{sub 2} might cause the TE/TiO{sub 2}/Pt structure to exhibit unstable resistive switching characteristics. According to these results, the oxidation reaction at the interface between the metal TE and TiO{sub 2} thin film is a primary factor affecting the resistive switching characteristics of TiO{sub 2}-based Resistive Random Access Memory devices.

Oh, Sang Chul [Department of Nano-Semiconductor Engineering, Korea University, Seoul 136-701 (Korea, Republic of); Jung, Ho Yong [Department of Material Science and Engineering, Korea University, Seoul 136-701 (Korea, Republic of); R and D Division, Hynix Semiconductor Inc., Cheongju 361-725 (Korea, Republic of); Lee, Heon [Department of Nano-Semiconductor Engineering, Korea University, Seoul 136-701 (Korea, Republic of); Department of Material Science and Engineering, Korea University, Seoul 136-701 (Korea, Republic of)

2011-06-15T23:59:59.000Z

127

Use of periodic approximants in a dynamical LEED study of the quasicrystalline tenfold surface of decagonal Al-Ni-Co  

SciTech Connect

The determination of quasicrystal (QC) surface structures is a challenge to current surface structure techniques. Low-energy electron diffraction (LEED) is the primary technique for the determination of periodic surface structures, but application of dynamical LEED to quasicrystals requires the use of many approximations. In this study, two different approaches were used to apply dynamical LEED to the structure of the tenfold surface of decagonal Al{sub 73}Ni{sub 10}Co{sub 17}. One method (method 1) involves the use of a quasicrystalline model along with approximations that average over the composition and local geometries. The other method (method 2) uses periodic models that approximate the actual local QC structure (approximants) in more exact, atomistic calculations. Although the results using the two methods were consistent, the results of the approximant analysis (method 2) suggested a different way to apply the approximations in method 1, resulting in a better fit between experimental and calculated beams. Thus, periodic approximant structure models can provide a simpler and more efficient method for the determination of local geometries in QC surfaces, and may also facilitate analyses using quasicrystal models.

Pussi, K.; Ferralis, N.; Mihalkovic, M.; Widom, M.; Curtarolo, S.; Gierer, M.; Jenks, C. J.; Canfield, P.; Fisher, I. R.; Diehl, R. D. [Department of Electrical Engineering, Lappeenranta University of Technology, P.O. Box 20, FIN-53851 Lappeenranta (Finland); Physics Department and Materials Research Institute, Penn State University, University Park, Pennsylvania 16802 (United States); Slovak Academy of Sciences, Dubravska Cesta 9, Bratislava 84228 (Slovakia); Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 (United States); Department of Materials Science and Mechanical Engineering, Duke University, Durham, North Carolina 27708 (United States); Institute for Crystallography and Applied Mineralogy, Theresienstrasse 41, 80333 Muenchen (Germany); Ames Laboratory, Iowa State University, Ames, Iowa 50011 (United States); Physics Department and Materials Research Institute, Penn State University, University Park, Pennsylvania 16802 (United States)

2006-05-01T23:59:59.000Z

128

Dielectric Relaxation In Complex Perovskite Sm(Ni{sub 1/2}Ti{sub 1/2})O{sub 3}  

SciTech Connect

The complex perovskite oxide Samarium nickel titenate, Sm(Ni{sub 1/2}Ti{sub 1/2})O{sub 3}(SNT) is synthesized by a solid-state reaction technique. The X-ray diffraction of the sample at room temperature shows a monoclinic phase. The scanning micrograph of the sample shows the average grain size{approx_equal}0.6{mu}m The field dependence of dielectric response and the loss tangent of the sample are measured in a frequency range from 100Hz to 1MHz and in a temperature range from 313 K to 673 K. An analysis of the real and imaginary parts of the dielectric permittivity with frequency is performed, assuming a distribution of relaxation times as confirmed by Cole-Cole plots. The frequency dependent electrical data are analyzed in the framework of conductivity formalism. The frequency dependent conductivity data are fitted to the universal power law. All these formalisms provided for qualitative similarities in the relaxation times.

Kumar, Nishant; Prasad, S. [Deptt. Of Physics, T.M.B.U., Bhagalpur, Bihar (India); Sinha, T. P. [Deptt. Of Physics, Bose Institute, 93/1, A. P. C. Road, Kolkata 700009 (India)

2011-11-22T23:59:59.000Z

129

Microstructural characterization of a Zr-Ti-Ni-Mn-V-Cr based AB{sub 2}-type battery alloy  

SciTech Connect

Transmission Electron Microscopy (TEM), combined with X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) was employed to investigate a proprietary and multicomponent AB{sub 2} type Nickel-Metal Hydride (Ni-MH) battery alloy. This material was prepared by High Pressure Gas Atomization (HPGA) and examined in both the as-atomized and heat treated condition. TEM examination showed a heavily faulted dendritic growth structure in as-atomized powder. Selected Area Diffraction (SAD) showed that this region consisted of both a cubic C15 structure with lattice constant a=7.03 and a hexagonal C14 structure with lattice parameter a=4.97 {angstrom}, c=8.11 {angstrom}. The Orientation Relationship (OR) between the C14 and C15 structures was determined to be (111)[1{bar 1}0]{sub C15}//(0001)[11{bar 2}0]{sub C14}. An interdendritic phase possessing the C14 structure was also seen. There was also a very fine grain region consisting of the C14 structure. Upon heat treatment, the faulted structure became more defined and appeared as intercalation layers within the grains. Spherical particles rich in Zr and Ni appeared scattered at the grain boundaries instead of the C14 interdendritic phase. The polycrystalline region also changed to a mixture of C14 and C15 structures. These results as well as phase stability of the C15 and C14 structures based on a consideration of atomic size factor and the average electron concentration are discussed.

Shi, Zhan

1999-01-01T23:59:59.000Z

130

Plasma plume effects on the conductivity of amorphous-LaAlO{sub 3}/SrTiO{sub 3} interfaces grown by pulsed laser deposition in O{sub 2} and Ar  

SciTech Connect

Amorphous-LaAlO{sub 3}/SrTiO{sub 3} interfaces exhibit metallic conductivity similar to those found for the extensively studied crystalline-LaAlO{sub 3}/SrTiO{sub 3} interfaces. Here, we investigate the conductivity of the amorphous-LaAlO{sub 3}/SrTiO{sub 3} interfaces grown in different pressures of O{sub 2} and Ar background gases. During the deposition, the LaAlO{sub 3} ablation plume is also studied, in situ, by fast photography and space-resolved optical emission spectroscopy. An interesting correlation between interfacial conductivity and kinetic energy of the Al atoms in the plume is observed: to assure conducting interfaces of amorphous-LaAlO{sub 3}/SrTiO{sub 3}, the kinetic energy of Al should be higher than 1 eV. Our findings add further insights on mechanisms leading to interfacial conductivity in SrTiO{sub 3}-based oxide heterostructures.

Sambri, A.; Amoruso, S.; Bruzzese, R.; Wang, X. [CNR-SPIN and Dipartimento di Scienze Fisiche, Complesso Universitario di Monte Sant'Angelo, Via Cintia, I-80125 Napoli (Italy); Cristensen, D. V.; Trier, F.; Chen, Y. Z.; Pryds, N. [Department of Energy Conversion and Storage, Risoe Campus, Technical University of Denmark, DK-4000 Roskilde (Denmark)

2012-06-04T23:59:59.000Z

131

A numerical method for predicting the bending fatigue life of NiTi and stainless steel root canal  

E-Print Network (OSTI)

or fluctuating strains at nominal stresses below (and often much less than) the yield strength of the material (Bannantine et al. 1989, ASM Interna- tional 1996). The material will succumb to propagat- ing fatigue­cracks) and are subjected to harsh working (corrosive) condi- tions under a combination of torsional and bending moments

Zheng, Yufeng

132

Electrochemical hydrogen storage in LaNi{sub 4.25}Al{sub 0.75} alloys: A comparative study between film and powder materials  

Science Conference Proceedings (OSTI)

A comparison is made of the electrochemical and structural properties of LaNi{sub 4.25}Al{sub 0.75} alloys in thin film and powder forms. X-ray diffraction (XRD) revealed that both the LaNi{sub 4.25}Al{sub 0.75} thin film and powder materials are crystalline. Atomic force microscopy (AFM) and focused ion beam microscopy (FIB) proved that the film appeared to have a hill-like surface morphology, but was rather dense with a thickness of about 4.2 {mu}m. Simulated battery tests indicate that both exhibit similar electrochemical behavior, possibly due to their crystal structure, as it requires a primary activation to reach its fully active state. However it took a longer activation period for the film to be activated; an apparent initial decrease of charging voltage with cycle number was observed, as were abnormal discharge processes during activation. After 30 charge/discharge cycles, small needle-shaped aluminium oxide particles were formed on both the powder and film surfaces.

Wang, Z.M. [Center of Material Science and Engineering, Guilin University of Electronic Technology, Guilin, Guangxi, 541004 (China)], E-mail: zmwang@guet.edu.cn; Li, Chi Ying Vanessa [School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052 (Australia); Zhou Huaiying [Center of Material Science and Engineering, Guilin University of Electronic Technology, Guilin, Guangxi, 541004 (China); Liu Shi [Institute of Metal Research, Chinese Academy of Sciences (China); Chan, S.L.I. [School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052 (Australia)

2008-04-15T23:59:59.000Z

133

Excellent Passivation and Low Reflectivity Al2O3/TiO2 Bilayer Coatings for n-Wafer Silicon Solar Cells: Preprint  

DOE Green Energy (OSTI)

A bilayer coating of Al2O3 and TiO2 is used to simultaneously achieve excellent passivation and low reflectivity on p-type silicon. This coating is targeted for achieving high efficiency n-wafer Si solar cells, where both passivation and anti-reflection (AR) are needed at the front-side p-type emitter. It could also be valuable for front-side passivation and AR of rear-emitter and interdigitated back contact p-wafer cells. We achieve high minority carrier lifetimes {approx}1 ms, as well as a nearly 2% decrease in absolute reflectivity, as compared to a standard silicon nitride AR coating.

Lee, B. G.; Skarp, J.; Malinen, V.; Li, S.; Choi, S.; Branz, H. M.

2012-06-01T23:59:59.000Z

134

Measurements of excitation rate coefficients for Al-like ions: Fe XIV, Ni XVI, and Cu XVII  

Science Conference Proceedings (OSTI)

Absolute excitation rate coefficients for Fe XVI and Ni xvi ions ions are measured spectroscopically in the Texas Experimental Tokamak. Previous measurements for the 3d-3p transition array of Cu XVII are verified and the measurements are extended to the 3s3p/sup 2/..-->..3s/sup 2/3p transition array of this ion. The experimental rate coefficient for the 3d-3p transition array of Fe XIV is 6.2 x 10/sup -9/ cm/sup 3/ s/sup -1/ at an electron temperature near 160 eV and for Ni XVI and Cu XVII, the values are 4.2 x 10/sup -9/ and 3.8 x 10/sup -9/ cm/sup 3/ s/sup -1/, respectively, at an electron temperature near 240 eV. For the 3s3p/sup 2/ /sup 2/P/sub 3/2/..-->..3s/sup 2/3p /sup 2/P/sub 3/2/ transition array, the experimental excitation rate coefficient for Fe XIV is 8.2 x 10/sup -9/ cm/sup 3/ s/sup -1/ at an electron temperature near 160eV and for Ni XVI and Cu XVII the value is 5.5 x 10/sup -9/ cm/sup 3/ s/sup -1/ at an electron temperature near 240 eV. The uncertainty in these results is estimated to be +- 50% (one standard deviation). Computed values of absolute excitation rates in a distorted-wave approximation and Mewe's semiempirical formula are found to be in good agreement with the experimental values.

Datla, R.U.; Roberts, J.R.; Durst, R.D.; Hodge, W.L.; Klepper, C.C.; Rowan, W.L.; Mann, J.B.

1987-12-01T23:59:59.000Z

135

Synthesis of LiNiO2 cathode materials with homogeneous Al doping at the atomic level  

Science Conference Proceedings (OSTI)

Aluminum doped LiNiO2 cathode materials are synthesized by using Raney nickel as the starting material. The structure and composition are characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) coupled with elemental mapping. The lithium deficiency is analyzed by Rieveld refinement. The initial capacity and retention of capacity are correlated to the lithium deficiency of the resulting cathode material. Using strong oxidant of Li2O2 in the synthesis results in materials with improved electrochemical cyclability. The improvement is related to the diminishing of lithium deficiency in strong oxidizing synthesis conditions.

Liu, Zengcai [ORNL; Zhen, Honghe [Soochow University, Suzhou, People's Republic of China; Kim, Yoongu [ORNL; Liang, Chengdu [ORNL

2011-01-01T23:59:59.000Z

136

Inter-relationship between preparation methods, nickel loading, characteristics and performance in the reforming of crude ethanol over Ni/Al2O3 catalysts: A neural network approach  

Science Conference Proceedings (OSTI)

Artificial neural network (ANN) approach was used to design an optimum Ni/Al"2O"3 catalyst for the production of hydrogen by the catalytic reforming of crude ethanol based on determining the inter-relationships between catalyst-preparation methods, nickel ... Keywords: Artificial neural network, Catalyst characteristics, Crude-ethanol reforming, Hydrogen production, Optimum catalyst design

Shoumin Song; Abayomi J. Akande; Raphael O. Idem; Nader Mahinpey

2007-03-01T23:59:59.000Z

137

Characterization of carbonaceous species formed during reforming of CH{sub 4} with CO{sub 2} over Ni/CaO-Al{sub 2}O{sub 3} catalysts studied by various transient techniques  

Science Conference Proceedings (OSTI)

Catalytic reforming of methane to synthesis gas over wt% Ni/CaO-Al{sub 2}O{sub 3} was studied. Nickel particle morphology and its size distribution is thought to be influenced by the support composition, which in turn controls the origin, the kinetics, and the reactivity of carbon decomposition under reforming reaction conditions. 43 refs., 10 figs., 4 tabs.

Goula, M.A.; Lemonidou, A.A. [Aristotle Univ. of Thessaloniki (Greece); Efstathiou, A.M. [University Campus, Patras (Greece)

1996-07-01T23:59:59.000Z

138

Conversion of CH4/CO2 to syngas over Ni-Co/Al2O3-ZrO2 nanocatalyst synthesized via plasma assisted co-impregnation method: Surface properties and catalytic performance  

Science Conference Proceedings (OSTI)

Ni/Al2O3 catalyst promoted by Co and ZrO2 was prepared by co-impregnation method and treated with glow discharge plasma. The catalytic activity of the synthesized nanocatalysts has been tested toward conversion of CH4/CO2 to syngas. The physicochemical characterizations like XRD EDX

Nader Rahemi; Mohammad Haghighi; Ali Akbar Babaluo; Mahdi Fallah Jafari

2013-01-01T23:59:59.000Z

139

Properties of ZrZrCZrC/DLC gradient films on TiNi alloy by the PIIID technique combined with PECVD  

E-Print Network (OSTI)

better corrosion resistance property and higher depression ability for the Ni ion releasing from the Ni the alloy in the body fluid environment because of bio-corrosion or erosion. Thus, it is necessary to modify. However, the high hardness, intrinsic stresses, and poor adhesion strength to the substrate limit its

Zheng, Yufeng

140

Use of time history speckle pattern and pulsed photoacoustic techniques to detect the self-accommodating transformation in a Cu-Al-Ni shape memory alloy  

Science Conference Proceedings (OSTI)

Continuous and pulsed electromagnetic radiation was used to detect the self-accommodation mechanism on a polycrystalline Cu-13.83 wt.%Al-2.34 wt.%Ni shape memory alloy. Rectangular samples of this alloy were mechanically polished to observe the austenite and martensite phases. The samples were cooled in liquid nitrogen prior to the experiments to obtain the martensite phase. Using a dynamic speckle technique with a continuous wave laser we obtained the time history of the speckle pattern image and monitored the surface changes caused by the self-accommodation mechanism during the inverse (martensitic to austenitic) transformation. Using a photoacoustic technique based on a pulsed laser source it was also possible to detect the self-accommodation phenomena in a bulk sample. For comparison purposes, we used differential scanning calorimetry (DSC) to detect the critical temperatures of transformation and use these as reference to evaluate the performance of the optical and photoacoustical techniques. In all cases, the same range of temperature was obtained during the inverse transformation. From these results, we conclude that time history speckle pattern (THSP) and pulsed photoacoustic are complementary techniques; they are non-destructive and useful to detect surface and bulk martensitic transformation induced by a temperature change.

Sanchez-Arevalo, F.M., E-mail: fsanchez@iim.unam.mx [CCADET - Universidad Nacional Autonoma de Mexico, A.P. 70-186, Mexico D.F., C.P. 04510 (Mexico); Aldama-Reyna, W. [Departamento Academico de Fisica, Universidad Nacional de Trujillo, Trujillo (Peru); Lara-Rodriguez, A.G. [Instituto de Investigaciones en Materiales, Universidad Nacional Autonoma de Mexico (Mexico); Garcia-Fernandez, T. [Universidad Autonoma de la Ciudad de Mexico (UACM), Prolongacion San Isidro 151, Col. San Lorenzo Tezonco, Mexico DF, C.P. 09790 (Mexico); Pulos, G. [Instituto de Investigaciones en Materiales, Universidad Nacional Autonoma de Mexico (Mexico); Trivi, M. [Centro de Investigaciones Opticas, Universidad de la Plata (Argentina); Villagran-Muniz, M. [CCADET - Universidad Nacional Autonoma de Mexico, A.P. 70-186, Mexico D.F., C.P. 04510 (Mexico)

2010-05-15T23:59:59.000Z

Note: This page contains sample records for the topic "ni ti al" from the National Library of EnergyBeta (NLEBeta).
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141

Functional properties of BaTiO{sub 3}-Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4} magnetoelectric ceramics prepared from powders with core-shell structure  

Science Conference Proceedings (OSTI)

In the present work, diphasic ceramic composites with core-shell nanostructures formed by Ni{sub 0.50}Zn{sub 0.50}Fe{sub 2}O{sub 4} core and BaTiO{sub 3} shell were investigated. Their properties were compared with those of composites prepared by coprecipitation. The core-shell structure was confirmed by microstructural powder analysis. Homogeneous microstructures with a good phase mixing and percolated dielectric phase by the magnetic one were obtained from coprecipitated powders. Less homogeneous microstructures resulted in ceramics produced from the powder prepared by core-shell method, with isolated small ferrite grains besides large ferrite aggregates embedded into the BaTiO{sub 3} matrix. Both the ferroelectric and magnetic phases preserve their basic properties in bulk composite form. However, important differences in the dielectric relaxation and conduction mechanisms were found as result of the microstructural difference. Extrinsic contributions play important roles in modifying the electric properties in both ceramics, causing space charge effect, Maxwell-Wagner relaxations and hopping conductivity, mainly due to the ferrite low resistivity phase. The conductivity and dielectric modulus spectra analysis allowed to identify different polaron contributions associated with the microstructural differences. It results that by using the core-shell method, improved dielectric properties and limited hopping contributions can be realized.

Curecheriu, L. P.; Mitoseriu, L.; Postolache, P. [Department of Physics, Al. I. Cuza University, Bv. Carol I, no. 11, Iasi 700506 (Romania); Buscaglia, M. T.; Buscaglia, V. [Institute for Energetics and Interphases, CNR, Via de Marini no. 6, Genoa I-16149 (Italy); Ianculescu, A. [Department of Oxide Materials Science and Engineering, Polytechnics University, 1-7 Gh. Polizu, P.O. Box 12-134, Bucharest 011061 (Romania); Nanni, P. [Institute for Energetics and Interphases, CNR, Via de Marini no. 6, Genoa I-16149 (Italy); Department of Chemistry and Process Engineering, University of Genoa, P-le Kennedy no. 1, Genoa (Italy)

2010-05-15T23:59:59.000Z

142

The effect of doping on global lattice properties of magnetite Fe{sub 3-x}Me{sub x}O{sub 4} (Me=Zn, Ti and Al)  

Science Conference Proceedings (OSTI)

X-ray powder diffraction was measured in Fe{sub 3-x}Me{sub x}O{sub 4} (Me=Zn, Ti, Al; x<0.065), in T range 70-300 K to see the effect of different doping on global lattice properties. The experimental results have shown that some lattice properties (e.g., the cell volume) are dopand specific. This can be attributed to the difference in preferential sites occupation by dopants. As confirmed by EXAFS, Zn enters tetrahedral, while Ti octahedral lattice sites, differently affecting crucial octahedral iron positions in the spinel lattice. However, despite this fact, it was found that T dependence of both monoclinic angle and lattice parameters is universal for studied samples above and below the Verwey transition temperature T{sub V}. So, not the iron atoms in octahedral positions individually, but interactions between them are responsible for the Verwey transition character change with doping. - Graphical abstract: A low temperature magnetite cell volume vs. dopants content. Apparently, Zn, Ti and Al atoms have different effect on the global lattice properties at individual temperatures. However, the Verwey transition reacts to dopants in a similar manner, despite the different way the octahedral iron positions are affected. Highlights: Black-Right-Pointing-Pointer We measure powder diffraction and EXAFS on Fe{sub 3-x}Me{sub x}O{sub 4}, Me=Zn, Ti, Al (x<0.065), in T range 70-300 K. Black-Right-Pointing-Pointer XRD: atom-type independent changes of lattice parameters with T. Black-Right-Pointing-Pointer EXAFS: Zn replaces Fe on tetrahedral positions, Ti on octahedral positions. Black-Right-Pointing-Pointer Thus, some secondary interactions between ordering orbitals, not the primary one driving the Verwey transition, control the transition order.

Kakol, Z. [AGH - University of Science and Technology, Faculty of Physics and Applied Computer Science, al. Mickiewicza 30, 30-059 Krakow (Poland); Owoc, D. [University of Agriculture, Department of Forest Work Mechanization, al. Mickiewicza 21, 31-120 Krakow (Poland); Przewoznik, J.; Sikora, M.; Kapusta, C. [AGH - University of Science and Technology, Faculty of Physics and Applied Computer Science, al. Mickiewicza 30, 30-059 Krakow (Poland); Zajac, D. [HASYLAB at DESY, Notkestrasse 85, Hamburg (Germany); Kozlowski, A., E-mail: kozlow@agh.edu.pl [AGH - University of Science and Technology, Faculty of Physics and Applied Computer Science, al. Mickiewicza 30, 30-059 Krakow (Poland); Sabol, J.E. [Chemical Consultant, Racine WI (United States); Honig, J.M. [Dept. of Chemistry, Purdue University, West Lafayette, IN (United States)

2012-08-15T23:59:59.000Z

143

The frequency and voltage dependent electrical characteristics of Al-TiW-Pd2Si/n-Si structure using I-V, C-V and G/?-V measurements  

Science Conference Proceedings (OSTI)

The forward and reverse bias capacitance-voltage (C-V) and conductance-voltage (G/w-V) characteristics of Al-TiW-Pd"2Si/n-Si structures have been investigated over a wide frequency range of 5kHz-5MHz. These measurements allow to us the determination ... Keywords: 73.30.+y, 73.40.Ns, 73.40.Qv, Frequency dependent, Interface states, MS structure, Pd2Si/n-Si contacts, Series resistance

?. M. Afandiyeva; ?. Dökme; ?. Alt?ndal; L. K. Abdullayeva; Sh. G. Askerov

2008-02-01T23:59:59.000Z

144

Au/MxOy/TiO2 catalysts for CO oxidation: promotional effect of main-group, transition, and rare-earth metal oxide additives.  

SciTech Connect

Au/TiO2 catalysts are active for CO oxidation, but they suffer from high-temperature sintering of the gold particles, and few attempts have been made to promote or stabilize Au/TiO2. Our recent communication addressed these issues by loading gold onto Al2O3/TiO2 prepared via surface-sol-gel processing of Al(sec-OC4H9)3 on TiO2. In our current full paper, Au/Al2O3/TiO2 catalysts were prepared alternatively by thermal decomposition of Al(NO3)3 on TiO2 followed by loading gold, and the influences of the decomposition temperature and Al2O3 content were systematically surveyed. This facile method was subsequently extended to the preparation of a battery of metal oxide-modified Au/TiO2 catalysts virtually not reported. It was found that Au/TiO2 modified by CaO, NiO, ZnO, Ga2O3, Y2O3, ZrO2, La2O3, Pr2O3, Nd2O3, Sm2O3, Eu2O3, Gd2O3, Dy2O3, Ho2O3, Er2O3, or Yb2O3 could retain significant activity at ambient temperature even after aging in O2-He at 500 C, whereas unmodified Au/TiO2 lost its activity. Moreover, some 200 C-calcined promoted catalysts showed high activity even at about -100 C. The deactivation and regeneration of some of these new catalysts were studied. This work furnished novel catalysts for further fundamental and applied research.

Ma, Zhen [ORNL; Overbury, Steven {Steve} H [ORNL; Dai, Sheng [ORNL

2007-01-01T23:59:59.000Z

145

Wrought TiAl Blades  

Science Conference Proceedings (OSTI)

First forged blades have been HPC blades of the Rolls-Royce BR715 engine from Gamma-TAB. The following evolution step was HPC blades for the ...

146

Ni-YSZ films deposited by reactive magnetron sputtering for SOFC applications E. Rezugina(*), A.L. Thomann, H. Hidalgo, P. Brault(*), V. Dolique, Y. Tessier  

E-Print Network (OSTI)

1 Ni-YSZ films deposited by reactive magnetron sputtering for SOFC applications E. Rezugina(*), A and fuel. At present, conventionally designed SOFCs operate at a relatively high temperature, between 800°C and 1000°C [2], which limits their field of application (problem of material thermal stability). SOFCs

Paris-Sud XI, Université de

147

Bench- and Pilot-Scale Studies of Reaction and Regeneration of Ni-Mg-K/Al2O3 for Catalytic Conditioning of Biomass-Derived Syngas  

DOE Green Energy (OSTI)

The National Renewable Energy Laboratory (NREL) is collaborating with both industrial and academic partners to develop technologies to help enable commercialization of biofuels produced from lignocellulosic biomass feedstocks. The focus of this paper is to report how various operating processes, utilized in-house and by collaborators, influence the catalytic activity during conditioning of biomass-derived syngas. Efficient cleaning and conditioning of biomass-derived syngas for use in fuel synthesis continues to be a significant technical barrier to commercialization. Multifunctional, fluidizable catalysts are being developed to reform undesired tars and light hydrocarbons, especially methane, to additional syngas, which can improve utilization of biomass carbon. This approach also eliminates both the need for downstream methane reforming and the production of an aqueous waste stream from tar scrubbing. This work was conducted with NiMgK/Al{sub 2}O{sub 3} catalysts. These catalysts were assessed for methane reforming performance in (i) fixed-bed, bench-scale tests with model syngas simulating that produced by oak gasification, and in pilot-scale, (ii) fluidized tests with actual oak-derived syngas, and (iii) recirculating/regenerating tests using model syngas. Bench-scale tests showed that the catalyst could be completely regenerated over several reforming reaction cycles. Pilot-scale tests using raw syngas showed that the catalyst lost activity from cycle to cycle when it was regenerated, though it was shown that bench-scale regeneration by steam oxidation and H{sub 2} reduction did not cause this deactivation. Characterization by TPR indicates that the loss of a low temperature nickel oxide reduction feature is related to the catalyst deactivation, which is ascribed to nickel being incorporated into a spinel nickel aluminate that is not reduced with the given activation protocol. Results for 100 h time-on-stream using a recirculating/regenerating reactor suggest that this type of process could be employed to keep a high level of steady-state reforming activity, without permanent deactivation of the catalyst. Additionally, the differences in catalyst performance using a simulated and real, biomass-derived syngas stream indicate that there are components present in the real stream that are not adequately modeled in the syngas stream. Heavy tars and polycyclic aromatics are known to be present in real syngas, and the use of benzene and naphthalene as surrogates may be insufficient. In addition, some inorganics found in biomass, which become concentrated in the ash following biomass gasification, may be transported to the reforming reactor where they can interact with catalysts. Therefore, in order to gain more representative results for how a catalyst would perform on an industrially-relevant scale, with real contaminants, appropriate small-scale biomass solids feeders or slip-streams of real process gas should be employed.

Magrini-Bair, K. A.; Jablonski, W. S.; Parent, Y. O.; Yung, M. M.

2012-05-01T23:59:59.000Z

148

Metal versus rare-gas ion irradiation during Ti{sub 1-x}Al{sub x}N film growth by hybrid high power pulsed magnetron/dc magnetron co-sputtering using synchronized pulsed substrate bias  

Science Conference Proceedings (OSTI)

Metastable NaCl-structure Ti{sub 1-x}Al{sub x}N is employed as a model system to probe the effects of metal versus rare-gas ion irradiation during film growth using reactive high-power pulsed magnetron sputtering (HIPIMS) of Al and dc magnetron sputtering of Ti. The alloy film composition is chosen to be x = 0.61, near the kinetic solubility limit at the growth temperature of 500 Degree-Sign C. Three sets of experiments are carried out: a -60 V substrate bias is applied either continuously, in synchronous with the full HIPIMS pulse, or in synchronous only with the metal-rich-plasma portion of the HIPIMS pulse. Alloy films grown under continuous dc bias exhibit a thickness-invariant small-grain, two-phase nanostructure (wurtzite AlN and cubic Ti{sub 1-x}Al{sub x}N) with random orientation, due primarily to intense Ar{sup +} irradiation leading to Ar incorporation (0.2 at. %), high compressive stress (-4.6 GPa), and material loss by resputtering. Synchronizing the bias with the full HIPIMS pulse results in films that exhibit much lower stress levels (-1.8 GPa) with no measureable Ar incorporation, larger grains elongated in the growth direction, a very small volume fraction of wurtzite AlN, and random orientation. By synchronizing the bias with the metal-plasma phase of the HIPIMS pulses, energetic Ar{sup +} ion bombardment is greatly reduced in favor of irradiation predominantly by Al{sup +} ions. The resulting films are single phase with a dense competitive columnar structure, strong 111 orientation, no measureable trapped Ar concentration, and even lower stress (-0.9 GPa). Thus, switching from Ar{sup +} to Al{sup +} bombardment, while maintaining the same integrated incident ion/metal ratio, eliminates phase separation, minimizes renucleation during growth, and reduces the high concentration of residual point defects, which give rise to compressive stress.

Greczynski, Grzegorz; Lu Jun; Jensen, Jens; Petrov, Ivan; Greene, Joseph E.; Bolz, Stephan; Koelker, Werner; Schiffers, Christoph; Lemmer, Oliver; Hultman, Lars [Department of Physics (IFM), Linkoeping University, SE-581 83 Linkoeping (Sweden); Department of Physics (IFM), Linkoeping University, SE-581 83 Linkoeping (Sweden) and Materials Science Department and Frederick Seitz Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801 (United States); Department of Physics (IFM), Linkoeping University, SE-581 83 Linkoeping (Sweden); Materials Science Department and Frederick Seitz Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801 (United States) and Department of Physics, University of Illinois, Urbana, Illinois 61801 (United States); CemeCon AG, Adenauerstr. 20 A4, D-52146 Wurselen (Germany); Department of Physics (IFM), Linkoeping University, SE-581 83 Linkoeping (Sweden)

2012-11-15T23:59:59.000Z

149

Structural Underpinnings of the Enhanced Cycling Stability upon Al-Substitution in LiNi[subscript 0.45]Mn[subscript 0.45]Co[subscript 0.1?y]Al[subscript y]O[subscript 2] Positive Electrode Materials for Li-ion Batteries  

Science Conference Proceedings (OSTI)

Single-phase LiNi{sub 0.45}Mn{sub 0.45}Co{sub 0.1-y}Al{sub y}O{sub 2} layered oxide materials with 0 {materials, but raises the operating voltage and reduces the capacity fade of the materials during prolonged cycling compared to the unsubstituted system. In situ X-ray diffraction suggests the presence of Al has a significant structural impact during battery operation. It acts to limit the changes in lattice parameters observed during electrochemical charging and cycling of the materials. High-resolution X-ray diffraction reveals structural distortions in the transition metal layers of as-synthesized powders with high Al-contents, as well as a structural evolution seen in all materials after cycling.

Conry, Thomas E.; Mehta, Apurva; Cabana, Jordi; Doeff, Marca M. (UCB); (SSRL)

2012-10-23T23:59:59.000Z

150

Laser Deposited In Situ TiC Reinforced Nickel Matrix Composites  

Science Conference Proceedings (OSTI)

Abstract Scope, A new class of Ni-Ti-C based metal matrix composites has been ... of Metal Matrix Composites via Spark Plasma Sintering for Nuclear Energy ...

151

Influence of support material on Ni catalysts for propane dry reforming to synthesis gas.  

E-Print Network (OSTI)

??Ni/SiO2 and Ni/Mg(Al)O catalysts with difference metal loadings have been prepared. The activity, selectivity and stability of supported Ni catalysts for propane dry reforming to… (more)

Dai, Xin

2008-01-01T23:59:59.000Z

152

NiO as a peculiar support for metal nanoparticles in polyols oxidation  

SciTech Connect

The peculiar influence of a NiO support was studied by preparing gold catalysts supported on NiO(1-x) TiO2(x) mixed oxides. PVA protected Au nanoparticles showed high activity when supported on NiO for the selective oxidation of glycerol and ethan-1,2-diol. A detailed characterization of the resulting Au catalysts revealed a preferential deposition of the metal nanoparticles on the NiO phase. However, the activity of Au on NiO(1-x)-TiO2(x) decreased with respect to pure NiO and the selectivity evolved with changes to the support.

Villa, Alberto [Universita di Milano, Italy; Veith, Gabriel M [ORNL; Ferri, Davide [EMPA, Laboratory for High Performance Ceramics, Duebendorf, Switzerland; Weidenkaff, Anke [EMPA, Laboratory for High Performance Ceramics, Duebendorf, Switzerland; Perry, Kelly A [ORNL; Campisi, Sebastiano [University of Milan and INFN, Milano, Italy; Prati, Laura [Universita di Milano, Italy

2013-01-01T23:59:59.000Z

153

XPS and FTIR study of Ru/Al{sub 2}O{sub 3} and Ru/TiO{sub 2} catalysts: Reduction characteristics and interaction with a methane-oxygen mixture  

SciTech Connect

The oxidation state of alumina- and titania-supported Ru catalysts has been investigated as a function of reduction temperature, as well as by following the interaction with a methane-oxygen mixture at 773 and 973 K, employing XPS and FTIR techniques. It is found that the chemical behavior of Ru depends strongly on the material on which it is supported. Over Al{sub 2}O{sub 3}, ruthenium is incompletely reduced by treatment with hydrogen at 573 and 823 K, while oxidized Ru species are also detected following exposure of the catalyst to a methane-oxygen mixture at 773 and 973 K. In contrast, over TiO{sub 2}, ruthenium is more easily reduced and is stabilized in its reduced state following hydrogen treatment at 823 K. During treatment with the methane-oxygen mixture, no reoxidation of Ru occurs. The interaction between Ru and TiO{sub 2}, which inhibits the oxidation of ruthenium under conditions of partial oxidation of methane, is related to the unique ability of the Ru/TiO{sub 2} catalyst to promote the direct route of synthesis gas formation.

Elmasides, C.; Kondarides, D.I.; Verykios, X.E. [Univ. of Patras (Greece). Dept. of Chemical Engineering; Gruenert, W. [Ruhr-Universitaet Bochum (Germany). Lehrstuhl fuer Technische Chemie

1999-06-24T23:59:59.000Z

154

Coexistence of Magnetic Order and Two-dimensional Superconductivity at LaAlO3/SrTiO3 Interfaces  

E-Print Network (OSTI)

A two dimensional electronic system forms at the interface between the band insulators LaAlO[subscript 3]

Li, Lu

155

Thermal Stability of Al 5356 Processed by Cryomilling and Spark ...  

Science Conference Proceedings (OSTI)

... Thermal Stability of Al 5356 Processed by Cryomilling and Spark Plasma Sintering ... Ordered Complexions: The Structure and Energy of Ni-Al2O3 Interfaces.

156

Powder Metallurgy Processing of Replicated Ni-Mn-Ga Foams  

Science Conference Proceedings (OSTI)

Development of a SMA-Based Drive Unit for Prehension Orthoses to Support Disabled People · Effect of H in Metals and Alloys: An Application to bcc W and NiTi ...

157

Al-Zr (Aluminum - Zirconium)  

Science Conference Proceedings (OSTI)

Al-Zr crystallographic data...6 3 / mcm ZrAl 22.8 oC 8 Cmcm Zr 2 Al 3 31 oF 40 Fdd 2 ZrAl 2 37.2 hP 12 P 6 3 / mmc ZrAl 3 47 tI 16 I 4/ mmm (Al) 99.86 to 100 cF 4 Fm m...

158

N NE EX XT T G GE EN NE ER RA AT TI IO ON N S SA AF FE EG  

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

NE NE EX XT T G GE EN NE ER RA AT TI IO ON N S SA AF FE EG GU UA AR RD DS S I IN NI IT TI IA AT TI IV VE E ( (N NG GS SI I) ) O OP PP PO OR RT TU UN NI IT TI IE ES S F FO OR R S ST TU UD DE EN NT TS S A AN ND D Y YO OU UN NG G P PR RO OF FE ES SS SI IO ON NA AL LS S I IN NT TE ER RE ES ST TE ED D I IN N S SA AF FE EG GU UA AR RD DS S/ /N NO ON NP PR RO OL LI IF FE ER RA AT TI IO ON N The Next Generation Safeguards Initiative (NGSI) was launched by the National Nuclear Security Administration (NNSA) in FY 2008 to develop the policies, concepts, technologies, expertise, and infrastructure necessary to strengthen and sustain the international safeguards system as it evolves to meet new challenges over the next 25 years. NGSI's Human Capital Development subprogram 1 aims to revitalize and expand the international safeguards human capital base in the United States by attracting, educating, training, and retaining

159

080- Carbon Modified (CM)-n-TiO  

Science Conference Proceedings (OSTI)

An undoped reference n-TiO2 sample was also synthesized in an electric oven for .... 131- Metastable ?-FeNi Particles for Self-Limited RF Heating.

160

A study of surface film formation on LiNi0.8Co0.15Al0.05O2 cathodes u sing attenuated total reflection infrared spectroscopy  

DOE Green Energy (OSTI)

The surface films formed on commercial LiNi0.8Co0.15Al0.05O2 cathodes (ATD Gen2) charged from 3.75V to 4.2V vs. Li/Li+ in EC:DEC - 1M LiPF6 were analyzed using ex-situ Fourier transform infrared spectroscopy (FTIR) with the attenuated total reflection (ATR) technique. A surface layer of Li2CO3 is present on the virgin cathode, probably from reaction of the active material with air during the cathode preparation procedure. The Li2CO3 layer disappeared even after soaking in the electrolyte, indicating that the layer dissolved into the electrolyte possibly even before potential cycling of the electrode. IR features only from the binder (PVdF) and a trace of polyamide from the Al current collector were observed on the surfaces of cathodes charged to below 4.2 V, i.e., no surface species from electrolyte oxidation. Some new IR features were, however, found on the cathode charged to 4.2 V and higher. An electrolyte oxidation product was observed that appeared to contain dicarbonyl anhydride and (poly)ester functionalities. The reaction appears to be an indirect electrochemical oxidation with overcharging (removal of > 0.6 Li ions) destabilizing oxygen in the oxide lattice resulting in oxygen transfer to the solvent molecules.

Song, S.-W.; Zhuang, G.V.; Ross Jr., P.N.

2004-01-19T23:59:59.000Z

Note: This page contains sample records for the topic "ni ti al" 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

Constant-amplitude fatigue-life data for notched and unnotched annealed ti-6al-4v sheet. Final report, January 1983-September 1986  

Science Conference Proceedings (OSTI)

Three lots of annealed Ti-6A1-4V sheet material in thicknesses of 0.063, 0.070, and 0.078 inch, supplied by two manufacturers, were tested to develop fatigue life curves for MIL-HDBK-5. Notched (Kt=3.0) and unnotched configurations of longitudinal and transverse specimens were tested at R ratios of +0.5, +0.1, and -0.5. Fatigue-life data are presented in both tabular and graphical forms. Results are presented in both tabular and graphical forms. Results were forwarded to the Battelle Memorial Institute, Columbus, Ohio, for analysis, reduction, and inclusion in MIL-HDBK-5.

Rhode, T.M.; Ertel, P.W.

1988-01-01T23:59:59.000Z

162

Liquid Phase Sintering of NiTi  

Science Conference Proceedings (OSTI)

Advances in Current Activated Tip-Based Sintering (CATS) · Advances in Synthesis and Densification of Heterogeneous Materials · Application of Metal Injection ...

163

In-situ raman microscopy of individual LiNi0.8Co0.15Al0.05O2 particles in the Li-ion battery composite cathode  

DOE Green Energy (OSTI)

Kinetic characteristics of Li{sup +} intercalation/deintercalation into/from individual LiNi{sub 0.8}Co{sub 0.15}Al{sub 0.05}O{sub 2} particles in a composite cathode were studied in-situ using Raman microscopy during electrochemical charge-discharge in 1.2 M LiPF{sub 6}, ethylene carbonate (EC): ethyl-methyl carbonate (EMC), 3:7 by volume. Spectroscopic analysis of a cathode that was removed from a tested high-power Li-ion cell, which suffered substantial power and capacity loss, showed that the state of charge (SOC) of oxide particles on the cathode surface was highly non-uniform despite deep discharge of the Li-ion cell at the end of the test. In-situ monitoring of the SOC of selected oxide particles in the composite cathode in a sealed spectro-electrochemical cell revealed that the rate at which particles charge and discharge varied with time and location. The inconsistent kinetic behavior of individual oxide particles was attributed to degradation of the electronically conducting matrix in the composite cathode upon testing. These local micro-phenomena are responsible for the overall impedance rise of the cathode and contribute to the mechanism of lithium-ion cell failure.

Lei, Jinglei; McLarnon, Frank; Kostecki, Robert

2004-10-01T23:59:59.000Z

164

Morphological Evaluation of Osteoblast-TiO2 Nanotube Interfaces  

Science Conference Proceedings (OSTI)

A Comparative Study of the Compressive Mechanical Properties of Young and ... of Ti-6Al-4V for Medical Applications after Surface Modification by Anodization.

165

Stress Corrosion Cracking Threshold of Ti 6-4 Extrusions  

Science Conference Proceedings (OSTI)

Ti 6Al-4V extrusions with standard chemistry and extra low interstitial are evaluated for their stress corrosion cracking resistance. Also examined is the affect of ...

166

Aliovalent titanium substitution in layered mixed Li Ni-Mn-Co oxides for lithium battery applications  

Science Conference Proceedings (OSTI)

Improved electrochemical characteristics are observed for Li[Ni1/3Co1/3-yMyMn1/3]O2 cathode materials when M=Ti and ycapacity.

Kam, Kinson; Doeff, Marca M.

2010-12-01T23:59:59.000Z

167

Comportamento eletroquímico do Ti Grau 2 e da liga Ti6A14V em tampőes citrato e tampőes MCLL Vaine contendo haletos.  

E-Print Network (OSTI)

??Estudou-se o comportamento eletroquímico do Ti grau 2 e da liga Ti6Al4V em tampőes citrato e tampőes Mcll Vaine, na presença de haletos, em uma… (more)

Anelise Marlene Schmidt

2003-01-01T23:59:59.000Z

168

(Ni,Pt)Al Systems Measured by  

Science Conference Proceedings (OSTI)

... Haide Ruiz-Luna, Luis Alberto Cáceres-Díaz, John Edison García-Herrera, Juan Muńoz-Saldańa, Jose Luis Ortiz-Merino, Gerardo Trapaga-Martinez, Ricardo ...

169

NiAl Alloys for Turbine Airfoils  

Science Conference Proceedings (OSTI)

specimens when the grinding marks were completely removed, as shown in Figure 4. ..... Use of new intermetallic-based alloy systems will be very selective.

170

Thermodynamic databases - TMS  

Science Conference Proceedings (OSTI)

Apr 8, 2008 ... Fe-DATA * Ni-DATA * NiFe-Super * Ti-DATA * TiAl-DATA Citation: " Thermodynamic databases," Thermotech Sente Software. Launch Site.

171

Characterization of New Phases in the Ti-Pt System Relevant to ...  

Science Conference Proceedings (OSTI)

Development of a SMA-Based Drive Unit for Prehension Orthoses to Support Disabled People · Effect of H in Metals and Alloys: An Application to bcc W and NiTi ...

172

Mixed Conducting Molten Salt Electrolyte for Na/NiCl 2 Cell  

Science Conference Proceedings (OSTI)

Catalytic Properties of Ni-Al Intermetallic Nanoparticle Catalysts for Hydrogen Production from Methanol and Methane · Ca, Li and Mg Based Lightweight ...

173

Ti Plasmid  

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

Ti Plasmid Ti Plasmid Name: Dixenia Location: N/A Country: N/A Date: N/A Question: What can you tell me about the Ti Plasmid? Replies: This plasmid is named for a plasmid found in a bacteria called Agrobacter tumefaciens. It causes "plant cancer" or what are known as galls. They are little tumors in which the bacteria can grow and live in the plant. Ti stands for tumor inducing. The bacterium gets into the plant through some kind of wound, ie. a scratch. It injects its plasmid into a plant cell and the plasmid inserts its DNA into the plant's DNA. Then the DNA directs the plant to make a hollow tumor where the bacteria can live. Scientists have taken advantage of this plant's ability to insert foreign DNA into a plant. They take the genes out of the plasmid that cause galls, and insert genes of interest, ie. genes for pest resistance and let the plasmid carry those genes into the plant. The plant will start making the product you want. You may have seen a picture of a tobacco plant glowing because firefly genes for glowing were inserted into the plant. They did this so they could know if the gene had made it into the plant. Once they are sure the gene they want has made it into the plant, they clone the plant cells. By the way, plant tissue culture is a procedure that is very common and has been done for years, this is not the same as cloning animals.

174

Advanced gas atomization production of oxide dispersion strengthened (ODS) Ni-base superalloys through process and solidification control.  

E-Print Network (OSTI)

??A novel gas atomization reaction synthesis (GARS) method was utilized to produce precursor Ni-Cr-Y-Ti powder with a surface oxide and an internal rare earth (RE)-containing… (more)

Meyer, John

2013-01-01T23:59:59.000Z

175

Synthesis of Nano-structured Titanium Dioxide (TiO2)  

Science Conference Proceedings (OSTI)

Catalytic Properties of Ni3Al Foils for Methane Steam Reforming · Characterization of the Crystallographic Textures and Mechanical Anisotropy Factors in Two ...

176

Mathematical Modelling of Welding Process of Al/Al2O3 ...  

Science Conference Proceedings (OSTI)

Direct Numerical Simulation of Inclusion Turbulent Deposition at Liquid ... Flow and Shrinkage Pipe Formation on Macrosegregation of Investment Cast -TiAl Alloys ... Numerical Modeling of the Interaction between a Foreign Particle an ...

177

Development of NiAl and NiAl-Based Composites for Structural ...  

Science Conference Proceedings (OSTI)

STRUCTURAL APPLICATIONS: A STATUS REPORT. Randy R. .... aluminides, or are incapable of forming protective oxide coatings such as many silicide.

178

Impact of TiN post-treatment on metal insulator metal capacitor performances  

Science Conference Proceedings (OSTI)

When deposited by chemical vapor deposition (CVD), TiN layers must be post-treated with N"2/H"2 plasma. Metal-insulator-metal (MIM) capacitors using CVD-TiN as electrodes and Al"2O"3 as insulator are studied from both electrical and physico-chemical ... Keywords: EELS analysis, Electrical characteristics, MIM capacitors, TiN post-treatment

A. Bajolet; J-P. Manceau; S. Bruyčre; R. Clerc; M. Proust; N. Gaillard; J-C. Giraudin; P. Delpech; L. Montčs; G. Ghibaudo

2006-11-01T23:59:59.000Z

179

ALS Spectrum  

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

ALS Spectrum Print Begun in 2007, ALS Spectrum is a publication that encapsulates the same type of information contained in the ALS Activity Report but in a short, readable,...

180

ALS Spectrum  

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

Spectrum Print Begun in 2007, ALS Spectrum is a publication that encapsulates the same type of information contained in the ALS Activity Report but in a short, readable,...

Note: This page contains sample records for the topic "ni ti al" 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

NiW and NiRu Bimetallic Catalysts for Ethylene Steam Reforming: Alternative Mechanisms for Sulfur Resistance  

SciTech Connect

Previous investigations of Ni-based catalysts for the steam reforming of hydrocarbons have indicated that the addition of a second metal can reduce the effects of sulfur poisoning. Two systems that have previously shown promise for such applications, NiW and NiRu, are considered here for the steam reforming of ethylene, a key component of biomass derived tars. Monometallic and bimetallic Al{sub 2}O{sub 3}-supported Ni and W catalysts were employed for ethylene steam reforming in the presence and absence of sulfur. The NiW catalysts were less active than Ni in the absence of sulfur, but were more active in the presence of 50 ppm H{sub 2}S. The mechanism for the W-induced improvements in sulfur resistance appears to be different from that for Ru in NiRu. To probe reasons for the sulfur resistance of NiRu, the adsorption of S and C{sub 2}H{sub 4} on several bimetallic NiRu alloy surfaces ranging from 11 to 33 % Ru was studied using density functional theory (DFT). The DFT studies reveal that sulfur adsorption is generally favored on hollow sites containing Ru. Ethylene preferentially adsorbs atop the Ru atom in all the NiRu (111) alloys investigated. By comparing trends across the various bimetallic models considered, sulfur adsorption was observed to be correlated with the density of occupied states near the Fermi level while C{sub 2}H{sub 4} adsorption was correlated with the number of unoccupied states in the d-band. The diverging mechanisms for S and C{sub 2}H{sub 4} adsorption allow for bimetallic surfaces such as NiRu that enhance ethylene binding without accompanying increases in sulfur binding energy. In contrast, bimetallics such as NiSn and NiW appear to decrease the affinity of the surface for both the reagent and the poison.

Rangan, M.; Yung, M. M.; Medlin, J. W.

2012-06-01T23:59:59.000Z

182

Combustion-reacted SiC-AlN Presinter and Pressureless Infiltration ...  

Science Conference Proceedings (OSTI)

Presentation Title, Combustion-reacted SiC-AlN Presinter and Pressureless Infiltration with ... Laser Deposited In Situ TiC Reinforced Nickel Matrix Composites: ...

183

Cu-Ni  

Science Conference Proceedings (OSTI)

... Ternary Fe-Cu-Ni many-body potential to model reactor pressure vessel ... alloy, This file was provided by Giovanni Bonny (Nuclear Materials Science ...

2013-07-06T23:59:59.000Z

184

Amorphous Al-transition Metal Alloys as Anode Material for Lithium Ion Battery  

E-Print Network (OSTI)

Al based alloy powders (Al??Ni?Y?Co?Fe?) are produced by spray atomization method. High energy ball milling is done to modify the surface topology and particle size for better electrochemical performance. X ray diffraction ...

Wang, C.Y.

185

Synthesis of In-situ AlTi2/TiC/AlTi2C Hybrid Nanocomposite Coating ...  

Science Conference Proceedings (OSTI)

The formation of coating during mechanical alloying was the results of repetitive cold welding and fracturing of powder particles with each other and with hard ...

186

ALS@20  

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

feed-image feed-image Digg: ALSBerkeleyLab Facebook Page: 208064938929 Flickr: advancedlightsource Twitter: ALSBerkeleyLab YouTube: AdvancedLightSource Home About the ALS ALS@20 ALS@20 ALS@20 Kick-Off Celebration Print On Friday, January 11, the Advanced Light Source celebrated the beginning of its 20th anniversary year with a brunch attended by more than 150 current and past staff members. After introductory remarks describing the trials and tribulations encountered during the construction of the ALS from former Director Jay Marx, current ALS Scientific Director Steve Kevan and Director Roger Falcone talked about the progress of the facility over the years. Attendees were then able to view more than 500 historical photos of the ALS and its staff displayed around the room.

187

LBNL-4183E-rev1 N NA AT TU UR RA AL L G GA AS S V VA AR RI  

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

4183E-rev1 4183E-rev1 N NA AT TU UR RA AL L G GA AS S V VA AR RI IA AB BI IL LI IT TY Y I IN N C CA AL LI IF FO OR RN NI IA A: : E EN NV VI IR RO ON NM ME EN NT TA AL L I IM MP PA AC CT TS S A AN ND D D DE EV VI IC CE E P PE ER RF FO OR RM MA AN NC CE E E EX XP PE ER RI IM ME EN NT TA AL L E EV VA AL LU UA AT TI IO ON N O OF F I IN NS ST TA AL LL LE ED D C CO OO OK KI IN NG G E EX XH HA AU US ST T F FA AN N P PE ER RF FO OR RM MA AN NC CE E Brett C. Singer, William W. Delp and Michael G. Apte Indoor Environment Department Atmospheric Sciences Department Environmental Energy Technologies Division July 2011 (Revised February 2012) Disclaimer 1 This document was prepared as an account of work sponsored by the United States Government. While this document is believed to contain correct information, neither the United States Government nor any agency thereof, nor The Regents of the University of California, nor any of

188

Grain Refinement of Al Cast by Al5CuTi2, Al22Fe3Ti8 and ...  

Science Conference Proceedings (OSTI)

... and Welding Conditions of Monopile and Transition for Offshore Wind Plant ... Optimization of a New Polycrystalline Superalloy for Industrial Gas Turbines.

189

Industry @ ALS  

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

Industry @ ALS Industry @ ALS Industry @ ALS Concrete Industry Benefits from Ancient Romans and the ALS Print Thursday, 17 October 2013 14:24 New insights into the Romans' ingenious concrete harbor structures emerging from ALS beamline research could move the modern concrete industry toward its goal of a reduced carbon footprint. Summary Slide Read more... Moving Industry Forward: Finding the Environmental Opportunity in Biochar Print Thursday, 12 September 2013 08:41 Using ALS Beamlines 10.3.2 and 8.3.2, the Environmental Protection Agency (EPA) is currently investigating how biochar sorbs environmental toxins and which kinds of biochar are the most effective. The possibilities for widespread use have already launched entrepreneurial commercial ventures. Summary Slide

190

Energetics Databases  

Science Conference Proceedings (OSTI)

Thermodynamic databases. Thermotech Sente Software. Al, Mg, Fe, Ni, NiFe- Super, Ti, TiAl alloy data (fee), 0, 1978, Cathy Rohrer, 4/8/2008 8:59 AM by Cathy  ...

191

ALS Visitors  

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

Energy. March 2010 ALS Project Manager Steve Rossi hosted a group of visitors from Kazakhstan on Friday, March 5. The visitors, including a representative from the Kazakhstan...

192

ALS Visitors  

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

ALS Visitors ALS Visitors ALS Visitors Print Wednesday, 29 July 2009 00:00 ALS staff members host a variety of scientific, educational, government, and community-related tours each month. November 2013 poneman U.S. Deputy Secretary of Energy Daniel Poneman visited Berkeley Lab on Friday, Nov. 15, during a brief stay in the Bay Area. Glenn Mara of the University of California Office of the President and Aundra Richards of the DOE Berkeley Site Office joined Deputy Laboratory Director Horst Simon's welcome. They updated Poneman on the lab's future initiatives and current capital projects and heard briefings on cyber security, computing, and the Joint BioEnergy Institute. As second-in-command at DOE, Poneman is responsible for assisting the Secretary of Energy in the management and operations of the agency and acting on his behalf when necessary.During his tour of the ALS, Poneman (right) spoke with Ken Goldberg (Materials Sciences Division) at the CXRO beamline.

193

Aliovalent titanium substitution in layered mixed Li Ni-Mn-Co oxides for lithium battery applications  

SciTech Connect

Improved electrochemical characteristics are observed for Li[Ni1/3Co1/3-yMyMn1/3]O2 cathode materials when M=Ti and y<0.07, compared to the baseline material, with up to 15percent increased discharge capacity.

Kam, Kinson; Doeff, Marca M.

2010-12-01T23:59:59.000Z

194

(Ni,Pt)Ti High Temperature Shape Memory Alloys  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2011. Symposium, Shape Memory Alloys. Presentation Title, Phase Field Modeling of P-Phase ...

195

Preparation and Characterization of Porous Ni-Ti Alloys  

Science Conference Proceedings (OSTI)

Preliminary Investigations of the Effect of Particle Size and Tip Size in the Current Activated Tip-Based Sintering (CATS) of Nickel Powder Compacts.

196

The Superelastic Behavior of Ti-Ni Superelastic Wire Rope  

Science Conference Proceedings (OSTI)

The advantages of superelastic wire ropes are better fatigue life, increase bending flexibility and increase responsively. There are few studies of superelastic ...

197

Electric current enhanced defect mobility in Ni3Ti intermetallics  

E-Print Network (OSTI)

energies, through electrical resistivity 7,8 and PAScan be used much like electrical resistivity 7,14 to analyze

Garay, J E; Glade, S C; Anselmi-Tamburini, U; Asoka-Kumar, P; Munir, Zuhair A

2004-01-01T23:59:59.000Z

198

Dealloying of NiTi by Immersion in Metallic Melt  

Science Conference Proceedings (OSTI)

Borate Glass Nanofiber/Whiskers in a Hybrid Orthopedic Composite Implants for ... G6: Production of High Translucent Self-Colored Dental Zirconia Blocks.

199

ALS Visitors  

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

ALS Visitors Print ALS Visitors Print ALS staff members host a variety of scientific, educational, government, and community-related tours each month. November 2013 poneman U.S. Deputy Secretary of Energy Daniel Poneman visited Berkeley Lab on Friday, Nov. 15, during a brief stay in the Bay Area. Glenn Mara of the University of California Office of the President and Aundra Richards of the DOE Berkeley Site Office joined Deputy Laboratory Director Horst Simon's welcome. They updated Poneman on the lab's future initiatives and current capital projects and heard briefings on cyber security, computing, and the Joint BioEnergy Institute. As second-in-command at DOE, Poneman is responsible for assisting the Secretary of Energy in the management and operations of the agency and acting on his behalf when necessary.During his tour of the ALS, Poneman (right) spoke with Ken Goldberg (Materials Sciences Division) at the CXRO beamline.

200

Al Weinrub  

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

Al Weinrub Al Weinrub Author, "COMMUNITY POWER: Decentralized Renewable Energy in California" Member, Sierra Club California Clean Energy-Climate CommitteeMember, Steering Committee, Bay Area Clean Energy Alliance al.weinrub@comcast.net This speaker was a visiting speaker who delivered a talk or talks on the date(s) shown at the links below. This speaker is not otherwise associated with Lawrence Berkeley National Laboratory, unless specifically identified as a Berkeley Lab staff member. Al Weinrub is a member of the Sierra Club California Energy-Climate Committee and serves on the Steering Committee of the Bay Area's Local Clean Energy Alliance. He is the author of COMMUNITY POWER: Decentralized Renewable Energy in California (http://www.localcleanenergy.org/Community-Power-Publication)

Note: This page contains sample records for the topic "ni ti al" 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

Al Gallo  

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

As the Director for the Office of Technology Evaluation, Al Gallo works closely with the Chief Technology Officer as well as many Program Offices to advance the introduction and adoption of...

202

On the remarkable optical and structural transformations in Mg-Ti-H thin  

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

On the remarkable optical and structural transformations in Mg-Ti-H thin On the remarkable optical and structural transformations in Mg-Ti-H thin films Speaker(s): Dana Borsa Date: October 16, 2006 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Venkat Srinivasan In searching for battery electrode materials, Mg-Ti-H thin films triggered much interest with its hydrogen storage capacity of approx. 4 times larger than that of conventional NiMH batteries [1]. Besides this, the same system has also absolutely remarkable optical properties [2]. Highly reflective in the metallic state, the films become highly absorbing upon hydrogen absorption. Mg0.80Ti0.20Hx thin films combine a high absorption (87% of the solar spectrum) with a low thermal emissivity (only 10%), while after removal of hydrogen Mg0.80Ti0.20 absorbs no more than 1/3 of the solar

203

O Ti-tE LOVE  

Office of Legacy Management (LM)

' ItqQtJulRl' IICt' O Ti-tE LOVE ~t?Al. . . At2D Al.CLkTED IChTTEtt~ . ' . . . : . ' . i I . . . . .mr TttE HOt\' ORAULE~ STANLEY FItZl:; SFCAKER ' . : ,J WE\J i' ORti STATE ASSH' rtrLY l r . . isay 29,.1980 Consultant to the Kew York ' , .' .I, " ..' . ,"' ! -. . . : . . . I.. . . . . ~. ,:- 9.. :. .' , * Ill . ,.. , ,i / All . ' %: : . : . . -. ;:. * :... . _ -. .' . . . I . ' J n' f armed. ?%c firtdingo and backup documentatiin embodied in thi preliminafy report compel the Task Yorao to call trprm ym; thr: . . I SpcnXer, to cwthorim crnd ompowcr the Assemly Sta?ding,CozmiCte I ' . : ,. . ..: .I' .,' :. .~.. ,:. :,-"'. ; ..d ::. . . .~~ ' .,' .' . : ' , ' ..,, -. . -. . . : : ? :. . . . .; *. . 1 ,.' .i. . . : \. .- :. " ' . . . c. : . I ! .'

204

Estudo das propriedades termomecânicas da liga cu 78,3% - al 9,8% mn 11,9%.  

E-Print Network (OSTI)

??The alloys Cu 78,3% - Al 9,8% - Mn 11,9 and 77.5% Cu - Al 9.8% - Mn 11,9% -% Nb 0.5 - 0.3% Ni… (more)

Rafael Evaristo Caluęte

2012-01-01T23:59:59.000Z

205

Enhancing solar photocatalytic detoxification by adsorption of porphyrins onto TiO sub 2  

DOE Green Energy (OSTI)

Titanium dioxide (TiO{sub 2}) is a known photocatalyst for solar detoxification of water containing organic contaminants including PCB's and dioxins. Unfortunately, the UV light used by the photocatalyst only comprises about 4% of the strong spectrum. Metalloporphyrins strongly absorb in the visible and near infrared region. Using visible light, we have investigated Ni(II) uroporphyrin (NiUroP), Sn(IV)Cl{sub 2} uroporphyrin (SnUroP) and Sn(IV)Cl{sub 2} tetrakis(p-carboxyphenyl) porphyrin (SnTCPP) as possible enhancers of destruction of a model organic compound, salicylic acid (SA), by means of photosensitization of colloidal TiO{sub 2} particles. All three porphyrins are found to adsorb reversibly onto the colloidal TiO{sub 2} upon variation of pH. Adsorption of porphyrins results in the increased colloidal stability of fine TiO{sub 2} particles in the pH range 5--8. While NiUroP on TiO{sub 2} does not show any enhancement of photodestruction, the adsorption of SnUroP increases the destruction rate compared to that of the bare TiO{sub 2} surface. The effect of ambient oxygen on the observed photolability of the Sn porphyrins and enhancement of photodestruction of SA was also investigated. SnTCPP does not photodecompose upon illumination either in the presence or absence of TiO{sub 2}, but neither does it bind to the photocatalyst at pH 6. At pH 4.5 it adsorbs onto TiO{sub 2} but it also photodecompose at this pH. We are attempting to stabilize the adsorbed porphyrins by adding suitable peripheral substituents onto the porphyrin macrocycle. 27 refs., 6 figs.

Majumder, S.A.; Ondrias, M.R. (New Mexico Univ., Albuquerque, NM (United States). Dept. of Chemistry); Prairie, M.R.; Shelnutt, J.A. (Sandia National Labs., Albuquerque, NM (United States))

1991-01-01T23:59:59.000Z

206

DFT Study of Initial Oxidation State on TiN Step Surfaces  

Science Conference Proceedings (OSTI)

Ab Initio Temperature-Dependent Lattice Dynamics for BCC Uranium · Ab Initio ... Accelerated Self-Diffusion in FCC Metals Due to H Induced Superabundant Vacancies .... Solute Diffusion in Ordered Bulk Ni3Al: A First Principles Investigation.

207

ALS Visitors  

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

Quick Facts Quick Facts ALS Visitors Print ALS staff members host a variety of scientific, educational, government, and community-related tours each month. November 2013 poneman U.S. Deputy Secretary of Energy Daniel Poneman visited Berkeley Lab on Friday, Nov. 15, during a brief stay in the Bay Area. Glenn Mara of the University of California Office of the President and Aundra Richards of the DOE Berkeley Site Office joined Deputy Laboratory Director Horst Simon's welcome. They updated Poneman on the lab's future initiatives and current capital projects and heard briefings on cyber security, computing, and the Joint BioEnergy Institute. As second-in-command at DOE, Poneman is responsible for assisting the Secretary of Energy in the management and operations of the agency and acting on his behalf when necessary.During his tour of the ALS, Poneman (right) spoke with Ken Goldberg (Materials Sciences Division) at the CXRO beamline.

208

D-10: The Effect of Molybdenum on Nb,Ti(C,N) Precipitate Evolution ...  

Science Conference Proceedings (OSTI)

The effects of molybdenum on niobium-bearing carbonitride interfacial ... D-7: Quantification of Compositional Effects on Transformation Kinetics in High ... D-9: Study of Shear Behavior of Al, TiN, and Their Interface Using ab intio Method.

209

In-Situ Phase Transformation Behavior of Ni-Rich NiTi Shape ...  

Science Conference Proceedings (OSTI)

This proposition has been substantiated through transmission electron ... Antagonistic SMA Actuator with Bowden Cable Housing for Orthosis Systems.

210

AL. I  

Office of Legacy Management (LM)

AL. I AL. I Department of Energy Washington, DC 20545 OCT 13 Vii87 Mr. John T. Shields A214 National Fertilizer Development Center Tennessee Valley Authority Muscle Shoals, Alabama 35660 Dear Mr. Shields: As you may know, the Department of Energy (DOE) is evaluating the radiological condition of sites that were utilized under the Manhattan Engineer District and the Atomic Energy Commission (AEC) during the early years of nuclear development to determine whether they need remedial action and whether the Department has authority to perform such action. AEC work at the TVA during the period 1951 through 1955 involved the development of a process to recover uranium from the production of phosphate fertilizer. A laboratory and pilot plant were operated at the site, but very little

211

Microstructural Evolution of Cu, Ni and Al Powder Particles ...  

Science Conference Proceedings (OSTI)

DRI Carburization in the Reduction and Transition Zones of a Shaft Furnace MIDREX Type · Effect of Casting Speed on Temperature Difference between ...

212

Atom Probe Tomography Analysis of Solute Clustering in Al-Mg-Si ...  

Science Conference Proceedings (OSTI)

Contributions of Atom Probe Tomography to the Understanding of Steels · Control of p-n ... Relationships in a Series of Co-Cr-Cu-Fe-Ni-Al High Entropy Alloys.

213

Ni-Zr (Nickel - Zirconium)  

Science Conference Proceedings (OSTI)

Ni-Zr crystallographic data...99.9 to 100 hP 2 P 6 3 / mmc (a) Triclinic. (b) Stoichiometric. (c) Zr-rich...

214

Imaging Chemical Aggregation of Ni/NiO Particles from Reduced NiO-YSZ  

SciTech Connect

Energy dispersive X-ray spectroscopy (EDS) mapping of nickel oxide yttria-stabilized zirconia (NiO-YSZ) was carried out after various hydrogen reducing and methane steam reforming conditions. Nickel aggregation was visualized after methane steam reforming by correlating Ni K{sub {alpha}} map with scanning transmission electron microscopy (STEM) images. From the reduced O K{sub {alpha}} intensities in the Ni K{sub {alpha}} dominated regions after methane steam reforming, NiO reduction in to Ni can be interpreted. From correlation between Zr K{sub {alpha}} and O K{sub {alpha}} maps, high stability of YSZ was also realized. Examples of NiO-YSZ overlapped particles are considered to discuss chemical imaging of a single particle.

Saraf, Laxmikant V.

2011-07-20T23:59:59.000Z

215

Transferable tight-binding parameters: An application to Ni and Ni-Al alloys  

Science Conference Proceedings (OSTI)

Two approaches for obtaining tight-binding parameters for metallic alloys are compared and contrasted with special regard for the application to large scale simulations such as may occur in tight-binding molecular dynamics studies.

Sluiter, M.H.F.; Singh, P.P.

1993-07-01T23:59:59.000Z

216

Electroless Ni-P and Ni-P-Al2O3 Nanocomposite Coatings and ...  

Science Conference Proceedings (OSTI)

An Overview of Hot Corrosion in Waste to Energy Boiler Environment and Its Remedies · Characterization of Copper Coatings on ASTM B221 Alloy by Low ...

217

ALS Project Management Manual  

E-Print Network (OSTI)

management practices across all ALS projects. It describesthat the primary weakness in ALS project management effortsrich projects common at the ALS. It is sometimes difficult

Krupnick, Jim; Harkins, Joe

2000-01-01T23:59:59.000Z

218

Thermodynamic Investigations in the Ternary Al-Ti-Cr System  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, 2014 TMS Annual Meeting & Exhibition. Symposium , Hume-Rothery Award Symposium: Thermodynamics and Kinetics of ...

219

Reducing the deactivation of Ni-metal during the catalytic partial oxidation of a surrogate diesel fuel mixture  

SciTech Connect

Ni catalysts are active and selective for the conversion of hydrocarbon into synthesis gas. However, conventional supported Ni catalysts rapidly deactivate at the high temperatures required for partial oxidation of diesel fuel by sintering and metal vaporization, as well as by carbon deposition and sulfur poisoning. Thus, to reduce deactivation Ni (3 wt%) was substituted into the structures of Ba-hexaaluminate (BNHA) and La–Sr–Zr pyrochlore (LSZN), and their activity was compared to a supported Ni/Al2O3 for the catalytic partial oxidation (CPOX) of a surrogate diesel fuel. Characterization by XRD showed a single phase #2;-alumina for the hexaaluminate, while LSZN had a pyrochlore structure with a defect SrZrO3 perovskite phase. Temperature programmed reduction experiments confirmed Ni was reducible in all catalysts. XANES results confirmed that Ni atoms were substituted into the hexaaluminate and pyrochlore structures, as spectra for each catalyst showed different coordination environments for Ni compared to a NiO standard. During CPOX activity tests (T = 900 ?C and WHSV= 50,000 scc/gcat/h), the LSZN pyrochlore produced stable H2 and CO yields in the presence of 5 wt% 1-methylnaphthalene and 50ppmw dibenzothiophene/n-tetradecane for 2 h, while both Ni/Al2O3 and BNHA catalysts were irreversibly deactivated by this mixture over the same time. Activity loss was strongly linked to carbon formation.

Haynes, D.; Campos, A.; Smith, M.; Berry, D.; Shekhawat, D.; Spivey, J.

2010-01-01T23:59:59.000Z

220

Access to the ALS  

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

Access to the ALS Access to the ALS Print User Access The ALS experiment floor (Building 6) is a Controlled Access Area for radiation protection. All ALS users are required to...

Note: This page contains sample records for the topic "ni ti al" 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

Access to the ALS  

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

Access to the ALS Print User Access The ALS experiment floor (Building 6) is a Controlled Access Area for radiation protection. All ALS users are required to register with the ALS...

222

Strong et al ALS FTD consensus criteria  

E-Print Network (OSTI)

Strong et al ALS FTD consensus criteria 1 Version: 20070606 Frontotemporal syndromes in amyotrophic, UCSF, San Francisco, California, USA (5) Forbes Norris MDA/ALS Research Center, San Francisco Kingdom (8) Science Director & Vice President, The ALS Association, Palm Harbor, Florida, U.S.A. (9

Dickerson, Brad

223

NiAl2O4/Al2O3 Nanoparticles with Perfect Catalytic Activity  

Science Conference Proceedings (OSTI)

Phase Change Materials in Thermal Energy Storage for Concentrating Solar Power (CSP) ... Process Modeling and Reduction of Copper Loss in Smelting Slag ... of Multi-Materials through a National Network in Manufacturing Materials.

224

Pt effects in c-Ni(Al)/a-Al 2O3 adhesion  

Science Conference Proceedings (OSTI)

might potentially affect adhesion by noble-metal Pt and to quantify their .... over different interlayer planes and search for the minimum. Wsep that results from the

225

Interfacial Facture Toughness of ?-Al2O3(0001) / ?-NiAl(110)  

Science Conference Proceedings (OSTI)

The effect of interfacial embrittlement sulphur and potential interfacial enhancer ... Lithium Ion Batteries: Materials Processing and Mechanical Degradation.

226

Plastic deformation of ordered intermetallic alloys: Fundamental aspects  

SciTech Connect

Fundamental aspects of plastic deformation in ordered intermetallic alloys are reviewed by directly comparing the temperature-dependent yield stresses of Ni{sub 3}Al and Ni{sub 3}Si (the L1{sub 2} structure), NiAl and FeAl (the B2 structure), and TiAl and Ti{sub 3}Al (non-cubic L1{sub 0} and D0{sub 19} structures, respectively). While the yield strength anomaly observed in Ni{sub 3}Al is consistent with the prevailing dislocation models, that found in stoichiometric Ni{sub 3}Si is not. The strong plastic anisotropy observed in NiAl stems from the high antiphase boundary energy, and that found in two-phase {gamma}-TiAl/{alpha}{sub 2}-Ti{sub 3}Al is due to the exceptionally high compressive yield strength along the c-axis of Ti{sub 3}Al.

Yoo, M.H. [Max-Planck-Inst. fuer Eisenforschung, Duesseldorf (Germany)

1994-10-01T23:59:59.000Z

227

Catalytic partial oxidation of methane to synthesis gas over Ni-based catalysts. 2: Transient, FTIR, and XRD measurements  

SciTech Connect

Ni/La{sub 2}O{sub 3} and Ni/Al{sub 2}O{sub 3} catalysts were studied under conditions of partial oxidation of methane to synthesis gas. Temperature-programmed oxidation and hydrogenation experiments have shown that carbon accumulation over Ni/La{sub 2}O{sub 3} during CPO remains essentially constant after 2 h time on-stream, while over Ni/Al{sub 2}O{sub 3} it increases during the initial several hours. FTIR spectroscopy of surface species formed over the Ni/La{sub 2}O{sub 3} catalyst under reaction conditions indicates that the carbonate species formed over the support do not decompose under He and O{sub 2} treatment at 600 C. XRD spectra obtained following high ({approximately}90%) or low (<10%) methane conversions show that Ni, La{sub 2}O{sub 3}, La{sub 2}O{sub 2}CO{sub 3}, NiO, and Ni{sub 3}C phases are present in the case of high methane and complete oxygen conversions, while nickel oxide, nickel carbide and, to a small extent, La{sub 2}O{sub 2}CO{sub 3} phases are present in the case of low CH{sub 4} and incomplete oxygen conversions.

Tsipouriari, V.A.; Verykios, X.E. [Univ. of Patras (Greece). Dept. of Chemical Engineering

1998-10-01T23:59:59.000Z

228

Influence of nuclear structure on sub-barrier hindrance in Ni+Ni fusion  

E-Print Network (OSTI)

Fusion-evaporation cross sections for $^{64}$Ni+$^{64}$Ni have been measured down to the 10 nb level. For fusion between two open-shell nuclei, this is the first observation of a maximum in the $S$-factor, which signals a strong sub-barrier hindrance. A comparison with the $^{58}$Ni+$^{58}$Ni, $^{58}$Ni+$^{60}$Ni, and $^{58}$Ni+$^{64}$Ni systems indicates a strong dependence of the energy where the hindrance occurs on the stiffness of the interacting nuclei.

C. L. Jiang; K. E. Rehm; R. V. F. Janssens; H. Esbensen; I. Ahmad; B. B. Back; P. Collon; C. N. Davids; J. P. Greene; D. J. Henderson; G. Mukherjee; R. C. Pardo; M. Paul; T. O. Pennington; D. Seweryniak; S. Sinha; Z. Zhou

2004-02-25T23:59:59.000Z

229

ALS Chemistry Lab  

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

ALS Chemistry Lab Print ALS Chemistry Labs The ALS Chemistry Labs are located in the User Support Building (15-130) and in Building 6 (6-2233)*. These spaces are dedicated for...

230

ALS superbend magnet system  

E-Print Network (OSTI)

ALS Superbend Magnet System J. Zbasnik † , S. T. Wang †† ,of a High-Field Magnet for the ALS,” Transactions AppliedRefrigeration options for the ALS Superbend dipole magnets”,

2000-01-01T23:59:59.000Z

231

Access to the ALS  

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

Gate Access Access to the ALS Print User Access The ALS experiment floor (Building 6) is a Controlled Access Area for radiation protection. All ALS users are required to register...

232

ALS Longitudinal Kicker  

E-Print Network (OSTI)

be published in the Proceedings ALS Longitudinal Kickers F.IJ3Ir-33088 lE93 005961 ALS Longitudinul Kickers* F. VoelkerContract No. DE-AC03-76SFOOO98. ALS LONGITUDINAL KICKERS F.

Voelkner, F.

2011-01-01T23:59:59.000Z

233

ALS superbend magnet performance  

E-Print Network (OSTI)

ALS Superbend Magnet Performance S. Marks, J. Zbasnik, W.the Advanced Light Source (ALS), with the fourth magnet as ahe Advanced Light Source (ALS) at the Lawrence Berkeley

2001-01-01T23:59:59.000Z

234

2012 ALS User Meeting  

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

2012 ALS User Meeting 2012 ALS User Meeting Print Tuesday, 14 June 2011 12:37 user meeting web banner Home Agenda Awards Exhibitors Lodging Posters Registration Transportation...

235

Al,N  

Science Conference Proceedings (OSTI)

Presentation Title, Significantly Bandgap-reduced and Enhanced PEC Response of Al and N Co-doped ZnO:(Al,N) Films for Solar Driven Hydrogen Production.

236

ALS Users' Association Charter  

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

organized framework for the interaction between those who use the Advanced Light Source (ALS) at the Lawrence Berkeley Laboratory (LBL) for their research and the ALS management,...

237

ALS Beamlines Directory  

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

Parameters, Contact Information, and Schedules Download a high-resolution version of the ALS Beamclock. See Beamclock to view the ALS energy-related beamlines beamclock. Beamline...

238

Ni(II) Sorption on Biogenic Mn-Oxides with Varying Mn  

E-Print Network (OSTI)

Lightsource (SSRL), Menlo Park, CA. EXAFS spectra from Ni(II) organic standards were collected in transmission-3 at SSRL. This method is described in detail in Zhu et al. (6). Results Sorption Isotherms and Dissolved Mn,anationaluserfacilityoperatedbyStanfordUniversity on behalf of the U.S. Department of Energy, Office of Basic Energy Sciences. The SSRL Structural Molecular

Sparks, Donald L.

239

Ni(II) Sorption on Biogenic Mn-Oxides with Varying Mn  

E-Print Network (OSTI)

Lightsource (SSRL), Menlo Park, CA. EXAFS spectra from Ni(II) organic standards were collected in transmission 11-3 at SSRL. This method is described in detail in Zhu et al. (6). Results Sorption Isotherms,anationaluserfacilityoperatedbyStanfordUniversity on behalf of the U.S. Department of Energy, Office of Basic Energy Sciences. The SSRL Structural Molecular

Sparks, Donald L.

240

Neutron Imaging @ SNS (NI@SNS 2008)  

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

Neutron Imaging at SNS Workshop (NI@SNS 2008) November 3, 2008 * Building 8600, Central Laboratory & Office Building * Oak Ridge, TN 37831 NI@SNS2008 home Neutron Imaging Agenda...

Note: This page contains sample records for the topic "ni ti al" 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

SF 6432-NI (02-22-10)  

interpreted in accordance with laws of New Mexico, and, where appropriate, the United States federal law. NI03 – ASSIGNMENT

242

Transfer of TiN/Ti/Ag metallization research  

Science Conference Proceedings (OSTI)

A simple technology for manufacturing extremely stable silicon solar cells is described. The process uses a sputtering technique to reactively deposit high quality TiN films to be used as diffusion barrier layers in metallization systems. The deposition parameters have been optimized to yield films with low-stress and with resistivities as low as 50..mu.. ohm-cm. The TiN films act as an excellent metal diffusion barrier layer below the contact grid-lines, and also upon controlled oxidation as a good anti-reflection coating of TiO/sub 2/ in the active area of the solar cell. Such a unique and dual application of the TiN layer considerably simplifies the fabrication of the cells. Cells so prepared are found to be stable with no degradation in their electrical performance after heat treatments up to 600/sup 0/C for 15 minutes. The application of TiN films in obtaining stable ohmic contacts to GaAs has also been investigated. Ohmic contacts to p-type GaAs have been formed with GaAs/Pt(mG)/TiN/Ag system, which possess low contact resistivity stable up to 550/sup 0/C heat treatments.

Tandon, J.

1986-05-01T23:59:59.000Z

243

XAFS Study of Epitaxial CoxTi1-xO?-x Anatase  

SciTech Connect

Co doped TiO?-anatase is a promising candidate for a room-temperature ferromagnetic semiconductor. XAFS measurements have been used to investigate the local Co environment and Co valence for several Co-anatase films. The samples were grown on LaAlO?(001) by oxygen plasma assisted molecular beam epitaxy and on SrTiO? by atomic oxygen assisted MBE. Co concentrations were about 5%. The measurements were made at the PNC-CAT bending magnet and undulator beamlines at the Advanced Photon Source. For the films on LaAlO?, the near edge clearly shows the presence of only Co(??), and no evidence for metallic Co, while the films on SrTiO? showed significant metallic Co. Analysis of the extended fine structure for the LaAlO? films finds that the Co substitutes for Ti with some distortion of the lattice. Both in-plane and out-of-plane Co-O bonds are expanded from the Ti-O bonds in anatase. The in-plane bonds are expanded approximately twice as much. A deficit in the oxygen coordination number suggests a correlation of oxygen vacancies with Co sites.

Heald, Steve M.; Chambers, Scott A.; Droubay, Timothy

2005-01-01T23:59:59.000Z

244

Experimental determination and thermodynamic modeling of the Ni-Re binary system  

Science Conference Proceedings (OSTI)

The phase diagram of the Ni-Re binary system has been partially reinvestigated by chemical, structural and thermal characterization of the arc melted alloys. The experimental results obtained during the present investigation were combined with the literature data and a new phase diagram of the Ni-Re binary system is proposed. In comparison with the Ni-Re phase diagram proposed by Nash et al. in 1985 [1], significant differences in the homogeneity domains, freezing ranges and peritectic reaction temperature were evidenced. On the other hand, thermodynamic modeling of the studied system by using the new experimental information has also been carried out with the help of the CALPHAD method. The calculated Ni-Re phase diagram showed a good agreement with the selected experimental information. - Graphical abstract: Ni-Re phase diagram according to the present study. Highlights: Black-Right-Pointing-Pointer Re-investigation of the Ni-Re phase diagram. Black-Right-Pointing-Pointer Extended phase field of the hcp phase. Black-Right-Pointing-Pointer Different freezing ranges and peritectic reaction temperature. Black-Right-Pointing-Pointer Thermodynamic modeling of the studied system by using the CALPHAD method.

Yaqoob, Khurram [Chimie Metallurgique des Terres Rares (CMTR), Institut de Chimie et des Materiaux Paris-Est (ICMPE), 2-8 rue Henri Dunant, 94320 Thiais Cedex (France)] [Chimie Metallurgique des Terres Rares (CMTR), Institut de Chimie et des Materiaux Paris-Est (ICMPE), 2-8 rue Henri Dunant, 94320 Thiais Cedex (France); Joubert, Jean-Marc, E-mail: jean-marc.joubert@icmpe.cnrs.fr [Chimie Metallurgique des Terres Rares (CMTR), Institut de Chimie et des Materiaux Paris-Est (ICMPE), 2-8 rue Henri Dunant, 94320 Thiais Cedex (France)] [Chimie Metallurgique des Terres Rares (CMTR), Institut de Chimie et des Materiaux Paris-Est (ICMPE), 2-8 rue Henri Dunant, 94320 Thiais Cedex (France)

2012-12-15T23:59:59.000Z

245

Microsoft PowerPoint - Effective Exploration of New_Zhao [Compatibilit...  

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

phases through high-throughput exploration together with computational thermodynamics. * Cost-effective steels for AUSC clean coal systems. Fe Ni Al, Nb, Ti, Si, Ta,...

246

Advancing Cutting Technology  

E-Print Network (OSTI)

steels, high speed steel, stellite and tungsten carbide withsteel ceramic Ti(C,N)-Ni,Mo stellite Al 2 O 3 -ZrO 2 Si 3 N

Byrne, G.; Dornfeld, David; Denkena, B.

2003-01-01T23:59:59.000Z

247

ALS Chemistry Lab  

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

Chemistry Lab Print ALS Chemistry Labs The ALS Chemistry Labs are located in the User Support Building (15-130) and in Building 6 (6-2233)*. These spaces are dedicated for...

248

ALS Staff Photo  

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

ALS Staff Photo Print On May 14, 2013, members of ALS staff posed for a group photo in front of the dome. A hi-res version can be downloaded here. The last staff photo was taken in...

249

ALS User Meeting  

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

ALS User Meeting Print Due to the current lapse of federal funding, Berkeley Lab Web sites, including ALS sites, are accessible, but may not be updated until Congress approves...

250

ALS User Meeting  

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

User Meeting ALS User Meeting Print Tuesday, 14 June 2011 12:37 Due to the current lapse of federal funding, Berkeley Lab Web sites, including ALS sites, are accessible, but may...

251

ALS User Meeting Archives  

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

ALS User Meeting Archives ALS User Meeting Archives Print Monday, 06 June 2011 09:25 Past User Meeting Agendas, Workshops, and Awards Year Agenda Workshops David A. Shirley...

252

111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111 us 20060200344Al  

E-Print Network (OSTI)

20060200344Al (19) United States (12) Patent Application Publication Kosek et al. (10) Pub. No.: US 2006) Inventors: Daniel A. Kosek, Missoula, MT (US); Robert Crawford Maher, Bozeman, MT (US) A method of reducing

Maher, Robert C.

253

Relativity and Magnetism in Ni-Pd and Ni-Pt Alloys Abstract  

E-Print Network (OSTI)

We show that the differences in the magnetic properties of Ni-Pd and Ni-Pt alloys arise mainly due to relativity. In particular, we find that the local magnetic moment of Ni increases with the addition of Pd in Ni-Pd while it decreases with the addition of Pt in Ni-Pt, as found experimentally, only if relativity is present. Our analysis is based on the effects of relativity on (i) the spin-polarized densities of states of Ni, (ii) the splitting of majority and minority spin d-band centers of Ni, and (iii) the separation between s-d band centers of Pd and Pt in Ni-Pd and Ni-Pt alloys. 1

Prabhakar P. Singh

2002-01-01T23:59:59.000Z

254

Resistance spot welding of Ti-6A1-4V alloy  

SciTech Connect

The effects of weld power, electrode force, electrode tip radius, and elapsed time between cleaning and welding on resistance spot welds in Ti-6Al-4V alloy were evaluated. The alloy is weldable by this technique, and a wide latitude can be taken in processing variables.

Jarboe, D.M.

1980-06-01T23:59:59.000Z

255

Direct measurement of the $^{44}$Ti($\\alpha$,p) reaction of importance to supernovae, using reclaimed $^{44}$Ti  

E-Print Network (OSTI)

Direct measurement of the $^{44}$Ti($\\alpha$,p) reaction of importance to supernovae, using reclaimed $^{44}$Ti

CERN. Geneva; Lindroos, Mats; CERN. Geneva. ISOLDE and Neutron Time-of-Flight Experiments Committee; INTC

2007-01-01T23:59:59.000Z

256

Preparation and characterization of Ni(OH)2 and NiO mesoporous nanosheets  

Science Conference Proceedings (OSTI)

Mesoporous nanosheets of single-crystalline ?-nickel hydroxide (?-Ni(OH)2) were successfully synthesized via a facile hydrothermal method using Ni(NO3)2 ? 6H2O as precursor in a mixed solution ...

Changyu Li; Shouxin Liu

2012-01-01T23:59:59.000Z

257

ALS User Meeting Archives  

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

and Mike Scheinfein (Arizona State University) for development of the PEEM2 photoemission electron microscope. to the members of the ALS User Services Office (Ruth Pepe, Bernie...

258

ALS Postdoctoral Fellowship Highlights  

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

Postdoctoral Fellowship Highlights Print Since its inception in 2005, the ALS Postdoctoral Fellowship program has supported young scientists in new and ongoing research projects at...

259

Howes et al. Reply  

E-Print Network (OSTI)

Howes et al. Reply to Comment on "Kinetic Simulations of Magnetized Turbulence in Astrophysical Plasmas" arXiv:0711.4355

Howes, G G; Dorland, W; Hammett, G W; Quataert, E; Schekochihin, A A; Tatsuno, T; 10.1103/PhysRevLett.101.149502

2008-01-01T23:59:59.000Z

260

ALS Users' Association Charter  

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

Users' Executive Committee ALS Users' Association Charter Print The purpose of the Advanced Light Source Users' Association (ALSUA) is to provide an organized framework for the...

Note: This page contains sample records for the topic "ni ti al" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
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261

ALS Postdoctoral Fellowship Program  

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x-ray radiation for scientific and technological research. As the world's first third-generation synchrotron radiation source, the ALS offers outstanding performance in the...

262

Chirped-Pulse Amplification with flashlamp-pumped Ti:Sapphire amplifiers  

Science Conference Proceedings (OSTI)

Ti:Sapphire (Ti:Al{sub 2}O{sub 3}) amplifier stages are typically pumped with Q-switched Nd:YAG lasers doubled to 532 nm because of good spectral overlap, short temporal width, high repetition rate (i.e., 10 Hz to > 5 kHz) and the problems associated with flashlamp pumping a material with a relatively short upper state lifetime. Limitations to this pumping method arise due to the 1 to 1.5 joule/pulse ceiling found in most commercial high rep rate Nd:YAG lasers. The availability of high quality, large aperture Ti:Sapphire rods has made the flashlamp-pumping scheme an attractive option. The excellent thermal properties of Ti:Sapphire also allows an amplifier to be operated at high repetition rates. The front end of our laser relies on Chirped Pulse Amplification (CPA) in laser pumped Ti:Sapphire to generate 55 NJ, 90 fsec pulses at a 10 Hz rate. We report the use of a flashlamp pumped Ti:Sapphire head to further amplify the output of our system, producing 90 fsec, 250 NJ pulses at 5 Hz. The excellent output spatial profile yields a near diffraction-limited 5 {mu}m spot size and peak irradiance in excess of 5 {times} 10{sup 18} W/cm{sup 2}.

Bonlie, J.D.; White, W.E.; Price, D.F.; Reitze, D.H.

1994-01-01T23:59:59.000Z

263

Nearly itinerant ferromagnetism in CaNi2 and CaNi3  

SciTech Connect

Single crystals of CaNi2 and CaNi3 are successfully grown out of excess Ca. Both compounds manifest a metallic ground state with enhanced, temperature-dependent magnetic susceptibility. The relatively high Stoner factors of Z=0.79 and 0.87 found for CaNi2 and CaNi3, respectively, reveal their close vicinity to ferromagnetic instabilities. The pronounced field dependence of the magnetic susceptibility of CaNi3 at low temperatures (T<25 K) suggests strong ferromagnetic fluctuations. A corresponding contribution to the specific heat with a temperature dependence of T3lnT is also observed.

Jesche, Anton; Dennis, Kevin W.; Kreyssig, Andreas; Canfield, Paul C.

2012-06-26T23:59:59.000Z

264

Development of Ni Base Superalloy for Industrial Gas Turbine  

Science Conference Proceedings (OSTI)

In response to this demand, Ni-base superalloys have been developed by MHI's alloy design system. These Ni-base superalloys have been applied to rotating ...

265

Science DMZ for ALS  

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

ALS ALS About ESnet Overview ESnet Staff Governance Our Network Case Studies OSCARS Case Studies Science DMZ Case Studies Science DMZ CU Science DMZ Penn State & VTTI Science DMZ NOAA Science DMZ NERSC Science DMZ ALS Multi-facility Workflow LCLS ESnet Strategic Plan ESnet Organizational Chart ESnet History Science Requirements Careers Contact Us Technical Assistance: 1 800-33-ESnet (Inside the US) 1 800-333-7638 (Inside the US) 1 510-486-7600 (Globally) 1 510-486-7607 (Globally) Report Network Problems: trouble@es.net Provide Web Site Feedback: info@es.net Science DMZ for ALS Many beamline scientists at Berkeley Lab's Advanced Light Source (ALS) are or will be experiencing slower network speeds because of instrument upgrades. These new instruments, or more specifically detectors, are

266

Electrodeposited NiCo/Cu Superlattices  

Science Conference Proceedings (OSTI)

NiCo/Cu superlattices were electrodeposited on polycrystalline Cu substrates from a single electrolyte under potentiostatic control. The X-ray diffraction (XRD) patterns showed that NiCo/Cu superlattices have the same crystal structure and texture as in their substrates. The films exhibited giant magnetoresistance (GMR) or anisotropic magnetoresistance (AMR), depending on the Cu layer thicknesses.

Safak, M.; Alper, M. [Department of Physics, Faculty of Science and Literature, University of Uludag, Goeruekle, Bursa (Turkey)

2007-04-23T23:59:59.000Z

267

IMPERMEABLE THIN AL2O3 OVERLAY FOR TBC PROTECTION FROM SULFATE AND VANADATE ATTACK IN GAS TURBINES  

SciTech Connect

The project started on September 1, 2001. During last 4 months, one post-doctor has been hired for this project. We have received TBC samples (YSZ/CoNiCrAlY/ Inconel 601) from Tohoku University, Japan, while processing of the TBC samples was delayed in GE Corp. Research and Development. The TBC preparation in Japan was based on our technical requirement by plasma spray. Bond coat CoNiCrAlY and the YSZ was produced by low-pressure plasma spray and air plasma spray respectively. The morphology of the surface and the microstructure of cross-section of the sample was observed and analyzed by SEM and EDX. XRD was also used to detect the phases in the YSZ. Currently we are processing the overlay Al{sub 2}O{sub 3} on the TBC samples by EB-PVD and high velocity oxy-fuel (HVOF) spray techniques in collaboration with Penn State University and State University of New York at Stony Brook. We will finish comparing the hot corrosion behavior of the Al{sub 2}O{sub 3}/YSZ/CoNiCrAlY/superalloy system with the YSZ/CoNiCrAlY/superalloy system. The mechanism of hot corrosion will be investigated. The processing-structure-properties relationship of the overlays will be determined.

Scott X. Mao

2002-01-31T23:59:59.000Z

268

ALS User Meeting Archives  

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ALS User Meeting Archives ALS User Meeting Archives Past User Meeting Agendas, Workshops, and Awards Year Agenda Workshops David A. Shirley (Science) Klaus Halbach (Instrumentation) Tim Renner (Service) 2012 2012 User Meeting Agenda 2012 User Meeting Workshops 2012 ALS User Meeting Awards Carl Percival, Dudley Shallcross, Craig Taatjes and David Osborn (Sandia), for making the first direct measurements of the reactions of Criegee intermediates, and showing that their impact on tropospheric chemistry and climate may be substantially greater than previously assumed. 2012 ALS User Meeting Awards Jeff Dickert and Simon Morton of Berkeley Lab's Physical Biosciences Division for the invention and implementation of the Compact Variable Collimator (CVC), which has led to a dramatic increase in productivity of protein crystallography.

269

ALS Beamlines Directory  

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

ALS Beamlines Directory Print ALS Beamlines Directory Print Beamlines, Parameters, Contact Information, and Schedules Download a high-resolution version of the ALS Beamclock. See Beamclock to view the ALS energy-related beamlines beamclock. Beamline Parameters Beamline and endstation technical information is available through the links below. Unless otherwise noted, all beamlines are currently operational. Individual beamline schedules are posted when available. Please contact the responsible beamline scientist for additional schedule information. When calling from off-site, all beamline (BL) phone numbers that begin with a "2" are preceded by 495- (i.e., 495-2014); all others are preceded by 486-. Beamline Number Source Technique/ Group Name Energy Range Beamline Contact Schedule/BL Phone

270

ALS Beamlines Directory  

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

ALS Beamlines Directory Print ALS Beamlines Directory Print Beamlines, Parameters, Contact Information, and Schedules Download a high-resolution version of the ALS Beamclock. See Beamclock to view the ALS energy-related beamlines beamclock. Beamline Parameters Beamline and endstation technical information is available through the links below. Unless otherwise noted, all beamlines are currently operational. Individual beamline schedules are posted when available. Please contact the responsible beamline scientist for additional schedule information. When calling from off-site, all beamline (BL) phone numbers that begin with a "2" are preceded by 495- (i.e., 495-2014); all others are preceded by 486-. Beamline Number Source Technique/ Group Name Energy Range Beamline Contact Schedule/BL Phone

271

2012 ALS Open House  

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House 2012 ALS Open House Print More than 6000 people came up the hill to see what is happening at Berkeley Lab during Open House on Saturday, October 13, and more than 1500 of...

272

ALS User Meeting  

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

Print Due to the current lapse of federal funding, Berkeley Lab Web sites, including ALS sites, are accessible, but may not be updated until Congress approves funds for Fiscal...

273

Epitaxial growth of Ti{sub 3}SiC{sub 2} thin films with basal planes parallel or orthogonal to the surface on {alpha}-SiC  

SciTech Connect

The growth of Ti{sub 3}SiC{sub 2} thin films were studied onto {alpha}-SiC substrates differently oriented by thermal annealing of TiAl layers deposited by magnetron sputtering. For any substrate's orientation, transmission electron microscopy coupled with x-ray diffraction showed the coherent epitaxial growth of Ti{sub 3}SiC{sub 2} films along basal planes of SiC. Specifically for the (1120) 4H-SiC, Ti{sub 3}SiC{sub 2} basal planes are found to be orthogonal to the surface. The continuous or textured nature of Ti{sub 3}SiC{sub 2} films does not depend of the SiC stacking sequence and is explained by a step-flow mechanism of growth mode. The ohmic character of the contact was confirmed by current-voltage measurements.

Drevin-Bazin, A.; Barbot, J. F.; Alkazaz, M.; Cabioch, T.; Beaufort, M. F. [Institut Pprime, UPR 3346, CNRS-Universite de Poitiers-ENSMA, Departement de Physique et Mecanique des Materiaux, SP2MI, Teleport 2, Bd M. et P. Curie, BP 30179, F-86962 Futuroscope-Chasseneuil (France)

2012-07-09T23:59:59.000Z

274

HVOF Thermal Spray TiC/TiB2 Coatings of AUSC Boiler/Turbine ...  

Science Conference Proceedings (OSTI)

The paper presents the research endeavors to synthesize TiC and TiB2 coatings on existing boiler materials for applications at high temperatures (500 -750 oC) ...

275

Pure rotational spectra of TiO and TiO_2 in VY Canis Majoris  

E-Print Network (OSTI)

We report the first detection of pure rotational transitions of TiO and TiO_2 at (sub-)millimeter wavelengths towards the red supergiant VY CMa. A rotational temperature, T_rot, of about 250 K was derived for TiO_2. Although T_rot was not well constrained for TiO, it is likely somewhat higher than that of TiO_2. The detection of the Ti oxides confirms that they are formed in the circumstellar envelopes of cool oxygen-rich stars and may be the "seeds" of inorganic-dust formation, but alternative explanations for our observation of TiO and TiO_2 in the cooler regions of the envelope cannot be ruled out at this time. The observations suggest that a significant fraction of the oxides is not converted to dust, but instead remains in the gas phase throughout the outflow.

Kaminski, T; Menten, K M; Patel, N A; Young, K H; Brunken, S; Muller, H S P; McCarthy, M C; Winters, J M; Decin, L

2013-01-01T23:59:59.000Z

276

Synthesis and Mechanical Properties of AL/ ?-Al12Mg17 ...  

Science Conference Proceedings (OSTI)

Symposium, Advances in Mechanics of One-Dimensional Micro/Nano Materials. Presentation Title, Synthesis and Mechanical Properties of AL/ ?-Al12Mg17 ...

277

Data Management at the ALS  

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

Data Management at the ALS Print Users of the ALS are responsible for meeting their data management obligations to their home institutions and granting agencies. The ALS does not...

278

Solidification and Microstructure Evaluation of the Ni-Ga and Co-Ni ...  

Science Conference Proceedings (OSTI)

Ni-Ga binary system is thus one of the basic binary system which forms the dominated ? ... The Effects of Natural and Marangoni Convection on the Resultant ...

279

Layering and temperature-dependent magnetization and anisotropy of naturally produced Ni/NiO multilayers  

Science Conference Proceedings (OSTI)

Ni/NiO multilayers were grown by magnetron sputtering at room temperature, with the aid of the natural oxidation procedure. That is, at the end of the deposition of each single Ni layer, air is let to flow into the vacuum chamber through a leak valve. Then, a very thin NiO layer ({approx}1.2 nm) is formed. Simulated x-ray reflectivity patterns reveal that layering is excellent for individual Ni-layer thickness larger than 2.5 nm, which is attributed to the intercalation of amorphous NiO between the polycrystalline Ni layers. The magnetization of the films, measured at temperatures 5-300 K, has almost bulk-like value, whereas the films exhibit a trend to perpendicular magnetic anisotropy (PMA) with an unusual significant positive interface anisotropy contribution, which presents a weak temperature dependence. The power-law behavior of the multilayers indicates a non-negligible contribution of higher order anisotropies in the uniaxial anisotropy. Bloch-law fittings for the temperature dependence of the magnetization in the spin-wave regime show that the magnetization in the multilayers decreases faster as a function of temperature than the one of bulk Ni. Finally, when the individual Ni-layer thickness decreases below 2 nm, the multilayer stacking vanishes, resulting in a dramatic decrease of the interface magnetic anisotropy and consequently in a decrease of the perpendicular magnetic anisotropy.

Pappas, S. D.; Trachylis, D.; Velgakis, M. J. [Laboratory of High-Tech Materials, School of Engineering, University of Patras, 26504 Patras (Greece); Kapaklis, V.; Joensson, P. E.; Papaioannou, E. Th. [Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala (Sweden); Delimitis, A. [Chemical Process Engineering Research Institute (CPERI), Centre for Research and Technology Hellas (CERTH), 57001 Thermi, Thessaloniki (Greece); Poulopoulos, P. [Laboratory of High-Tech Materials, School of Engineering, University of Patras, 26504 Patras (Greece); Institut fuer Experimentalphysik, Freie Universitaet Berlin, Arnimallee 14, D-14195 Berlin-Dahlem (Germany); Materials Science Department, University of Patras, 26504 Patras (Greece); Fumagalli, P. [Institut fuer Experimentalphysik, Freie Universitaet Berlin, Arnimallee 14, D-14195 Berlin-Dahlem (Germany); Politis, C. [Laboratory of High-Tech Materials, School of Engineering, University of Patras, 26504 Patras (Greece); Department of Materials Science and Engineering, University of Texas at Arlington, Arlington, Texas 76019 (United States)

2012-09-01T23:59:59.000Z

280

2012 ALS User Meeting Awards  

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

ALS User Meeting Awards Print Recipients of the 2012 Users' Executive Committee awards and Student Poster Competition were announced Tuesday, October 9, at the ALS User Meeting....

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


281

2012 ALS User Meeting Awards  

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

Awards 2012 ALS User Meeting Awards Print Recipients of the 2012 Users' Executive Committee awards and Student Poster Competition were announced Tuesday, October 9, at the ALS User...

282

2012 ALS User Meeting Awards  

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

2 ALS User Meeting Awards Recipients of the 2012 Users' Executive Committee awards and Student Poster Competition were announced Tuesday, October 9, at the ALS User Meeting. David...

283

2012 ALS User Meeting Awards  

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

2012 ALS User Meeting Awards Print Recipients of the 2012 Users' Executive Committee awards and Student Poster Competition were announced Tuesday, October 9, at the ALS User...

284

ALS in the News  

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

feed-image feed-image Digg: ALSBerkeleyLab Facebook Page: 208064938929 Flickr: advancedlightsource Twitter: ALSBerkeleyLab YouTube: AdvancedLightSource Home About the ALS ALS in the News ALS in the News Roman Seawater Concrete Holds the Secret to Cutting Carbon Emissions Print Tuesday, 04 June 2013 00:00 An international team led by Paulo Monteiro of the Advanced Light Source and UC Berkeley has analyzed samples of Roman concrete from harbor installations that have survived 2,000 years of chemical attack and wave action, "one of the most durable construction materials on the planet," says UC Berkeley's Marie Jackson, a leading member of the team. Says Monteiro, "It's not that modern concrete isn't good, but manufacturing Portland cement accounts for seven percent of the carbon dioxide that industry puts into the air." The carbon footprint of Roman concrete, made from lime, volcanic ash, and seawater, is much smaller.

285

ALS Beamlines Directory  

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

Beamlines Directory Beamlines Directory ALS Beamlines Directory Print Beamlines, Parameters, Contact Information, and Schedules Download a high-resolution version of the ALS Beamclock. See Beamclock to view the ALS energy-related beamlines beamclock. Beamline Parameters Beamline and endstation technical information is available through the links below. Unless otherwise noted, all beamlines are currently operational. Individual beamline schedules are posted when available. Please contact the responsible beamline scientist for additional schedule information. When calling from off-site, all beamline (BL) phone numbers that begin with a "2" are preceded by 495- (i.e., 495-2014); all others are preceded by 486-. Beamline Number Source Technique/ Group Name Energy Range Beamline Contact Schedule/BL Phone

286

TiC x N 1-x Eutectic Composite Prepared by  

Science Conference Proceedings (OSTI)

Presentation Title, Microstructure and Mechanical Property of TiB2-TiCxN1-x ... TiB2, TiC and TiN powders in N2 atmosphere at 60  ...

287

Brazing of Titanium Alloys Using Low-melting Eutectic Zr-Ti-Ni(Cu)  

Science Conference Proceedings (OSTI)

... Corrosion Inhibition for Hydrochloric Acid Pickling · Using Resistance Heating to Create Full-Scale API RP2Z CTOD Samples ...

288

TEM study of the Ni-Ti shape memory micro-wire  

Science Conference Proceedings (OSTI)

497. S. Richter, A. Schwedt (Eds.): EMC 2008, Vol. 2: Materials Science, pp. 497– 498,. DOI: 10.1007/978-3-540-85226-1_249, ? Springer-Verlag Berlin ...

289

Mechanical Properties of High Strength NiTiHfPd Shape Memory ...  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2011. Symposium, Shape Memory Alloys. Presentation Title, Mechanical Properties of High ...

290

Shape Memory Behavior of Heat Treated Ni60Ti40 (wt%)  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2011. Symposium, Shape Memory Alloys. Presentation Title, Shape Memory Behavior of Heat ...

291

Modification of NiTi Shape Memory Alloy Functional Properties Via ...  

Science Conference Proceedings (OSTI)

However, by utilizing the unprecedented multiple memory material (MMM) technology the functional properties of a monolithic component can be locally ...

292

Si Thin Film Electrode on TiNi Shape Memory Alloy (Current Collector)  

Science Conference Proceedings (OSTI)

3D Nanostructured Bicontinuous Electrodes: Path to Ultra-High Power and Energy ... High Energy Density Lithium Capacitors Using Carbon-Carbon Electrodes.

293

H8: Processing and Characterization of NiTi-MAX Phase ...  

Science Conference Proceedings (OSTI)

C19: Dissolution Behavior of Cu Under Bump Metallization in Ball Grid Array Structure ... E11: Evolution of the Grain Boundary Character Distribution During Grain ... for High Volume and Fast Turnaround Automated Inline TEM Sample Preparation .... H2: Triboluminescent Smart Sensors for Structural Health Monitoring.

294

Wettability Testing for Ni/Ti(CN) System in High Temperature  

Science Conference Proceedings (OSTI)

How to Control Strength and Grain Structure of 304L Stainless Steel during Forging · Improved ... Process Modeling and Reduction of Copper Loss in Smelting Slag ... Use of Polymeric Residues from the Footwear Industry in Layers of Asphalt ...

295

J49: Effect of Laser Centreline Offset in Dissimilar Joining of NiTi ...  

Science Conference Proceedings (OSTI)

A8: Microstructural Investigation of Nano-Calcium Phosphates Doped with Fluoride Ions .... D7: Surfactant Structure–property Relationship: Effect of Polypropylene ... E4: The Effect of Monobutyl Ether Ethylene Glycol on the Conductivity and ...

296

Thermoelectric Material Design of Half-Heusler (Zr,Ti)NiSn-based ...  

Science Conference Proceedings (OSTI)

... Kinetics of Anthracite Coal and Biomass Char by Thermogravimetric Analysis ... A2: Anode Properties of MgH2 for All Solid State Lithium Ion Battery.

297

Development of a Continuous Process to Produce Ti via ...  

Science Conference Proceedings (OSTI)

Presentation Title, Development of a Continuous Process to Produce Ti via Metallothermic Reduction of TiCl4 in Molten Salt. Author(s), David Steyn van Vuuren, ...

298

Fabrication of High Strength Pure Ti Matrix Composite Reinforced ...  

Science Conference Proceedings (OSTI)

Carbon black particles were added for the in situ formation of TiC dispersoids during the SPS process. Sponge and fine Ti powders were coated with carbon ...

299

Optimization of Ti addition in Fe for Fe-Ti-N thin films  

Science Conference Proceedings (OSTI)

In this work we studied the magnetic and structural properties of Fe{sub 1-x}Ti{sub x}(x=0, 0.02, 0.05, 0.07) thin films prepared with dc-magnetron sputtering. It was found that the inter-atomic spacing increases as the amount of Ti is increased indicating that Ti is getting dissolved substitutionally in Fe lattice. We found that the addition of 5% Ti is best suited for its usage in Fe-Ti-N alloys.

Tayal, Akhil; Gupta, Mukul; Gupta, Ajay; Stahn, Jochen; Horisberger, M. [UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore, 452001 (India); Laboratory for Neutron Scattering, Paul Scherrer Institut, CH-5232 Villigen PSI (Switzerland); Laboratory for Developments and Methods, Paul Scherrer Institut, CH-5232 Villigen PSI (Switzerland)

2012-06-05T23:59:59.000Z

300

Self-aligned Co nanoparticle chains supported by single-crystalline Al2O3/NiAl,,100... template  

E-Print Network (OSTI)

, Jhongli City, Taoyuan, Taiwan Ker-Jar Song Institute of Atomic and Molecular Sciences, Academia Sinica-Chin Lin Department of Physics, National Taiwan University, 106 Taipei, Taiwan and Institute of Atomic and Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, Taiwan Received 13 September 2004

Lin, Minn-Tsong

Note: This page contains sample records for the topic "ni ti al" 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

TiBw-Reinforced Ti Composites: Processing, Properties, Application ...  

Science Conference Proceedings (OSTI)

Z. Fan et al., J. Mater. Sci., 29 (1994), pp. 1127–1134. 16. R. Boyer, G. Welsch and E.W. Collings, editors, Materials Properties Handbook: Titanium Alloys ...

302

X-ray photoelectron spectroscopy characterization of the {omega} phase in water quenched Ti-5553 alloy  

SciTech Connect

X-ray photoelectron spectroscopy was used to investigate the {omega} phase in water quenched Ti-5553 alloy with a nominal composition of Ti-5Al-5V-5Mo-3Cr (wt.%), and the {omega} and the {beta} phase were distinguished by deconvoluting the XPS spectra of Al2p, V2p and Cr2p core level regions. In addition, it is found that the binding energy of core level electron of alloying elements shifts comparing with that of pure metals, and the fact was interpreted by charge redistribution model. X-ray photoelectron spectroscopy technique could be used to characterize the nano-scale {omega} phase in {beta} alloys. - Highlights: Black-Right-Pointing-Pointer We characterize the {omega} phase in Ti-5553 alloy by XPS. Black-Right-Pointing-Pointer Binding energy of Al2p, V2p and Cr2p electron are different in the {omega} and {beta} phase. Black-Right-Pointing-Pointer Structural difference leads to the binding energy gap.

Qin, Dongyang, E-mail: qindongyang19831205@126.com [State Key Laboratory for Mechanical Behavior of Materials, Xian Jiaotong University, Xi'an 710049 (China) [State Key Laboratory for Mechanical Behavior of Materials, Xian Jiaotong University, Xi'an 710049 (China); Northwest Institute for Non-ferrous Metal Research, Xi'an 710016 (China); Lu, Yafeng [Northwest Institute for Non-ferrous Metal Research, Xi'an 710016 (China)] [Northwest Institute for Non-ferrous Metal Research, Xi'an 710016 (China); Zhang, Kong; Liu, Qian [The State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050 (China)] [The State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050 (China); Zhou, Lian [Northwest Institute for Non-ferrous Metal Research, Xi'an 710016 (China)] [Northwest Institute for Non-ferrous Metal Research, Xi'an 710016 (China)

2012-11-15T23:59:59.000Z

303

AOCS Official Method Ti 1a-64  

Science Conference Proceedings (OSTI)

Spectrophotometric Determination of Conjugated Dienoic Acid AOCS Official Method Ti 1a-64 Methods and Analyses Methods Downloads Methods Downloads Official Method BE2786ABB98768E1DCF0ACFD1AE2520C MC-TI1A64 16847

304

FUNDAMENTALS OF GAMMA TITANIUM ALUMINIDES: I: Phase ...  

Science Conference Proceedings (OSTI)

They are disordered solution phases: liquid, (Ti, Al), (Ti, Al), (Al); ordered intermetallic phases: 2Ti3Al, TiAl, TiAl3 and stoichiometric compounds: TiAl2, Ti2Al5.

305

Synthesis, structure, magnetic susceptibility and Mossbauer and Raman spectroscopies of the new oxyphosphate Fe{sub 0.50}TiO(PO{sub 4})  

Science Conference Proceedings (OSTI)

A new iron titanyl oxyphosphate Fe{sub 0.50}TiO(PO{sub 4}) was synthesized by both solid-state reaction and Cu{sup 2+}-Fe{sup 2+} ion exchange method. The material was then characterized by X-ray diffraction, Mossbauer spectroscopy, magnetic susceptibility measurements and Raman spectroscopy. The crystal structure of the compound was refined, using X-ray powder diffraction data, by Rietveld profile method; it crytallizes in the monoclinic system, space group P2{sub 1}/c (No.14), with a=7.4039(3)A, b=7.3838(3)A, c=7.4083(3)A, {beta}=120.36{sup o}(1), V=349.44(2)A{sup 3} and Z=4. The volume of the title compound is comparable to those of the M{sub 0.50}{sup II}TiO(PO{sub 4}) series, where M{sup II}=Mg, Co, Ni and Zn. The framework is built up from [TiO{sub 6}] octahedra and [PO{sub 4}] tetrahedra. [TiO{sub 6}] octahedra are linked together by corners and form infinite chains along the c-axis. Ti atoms are displaced from the center of octahedral units showing an alternating short distance (1.73A) and a long one (2.22A). These chains are linked together by [PO{sub 4}] tetrahedra. Fe{sup 2+} cations occupy a triangle-based antiprism sharing two faces with two [TiO{sub 6}] octahedra. Mossbauer and magnetic measurements show the existence of iron only in divalent state, located exclusively in octahedral sites with high spin confition (t{sub 2g}{sup 4}e{sub g}{sup 2}). Raman study confirms the existence of Ti-O-Ti chains.

Benmokhtar, S. [LCMS, UFR Sciences des Materiaux Solides, Faculte des Sciences Ben M'Sik, Casablanca (Morocco)]. E-mail: s.benmokhtar@univh2m.ac.ma; El Jazouli, A. [LCMS, UFR Sciences des Materiaux Solides, Faculte des Sciences Ben M'Sik, Casablanca (Morocco); Chaminade, J.P. [Institut de chimie de la matiere condensee de Bordeaux (ICMCB-CNRS), 87, av. du Dr. A. Schweittzer-33608 Pessac (France); Gravereau, P. [Institut de chimie de la matiere condensee de Bordeaux (ICMCB-CNRS), 87, av. du Dr. A. Schweittzer-33608 Pessac (France); Wattiaux, A. [Institut de chimie de la matiere condensee de Bordeaux (ICMCB-CNRS), 87, av. du Dr. A. Schweittzer-33608 Pessac (France); Fournes, L. [Institut de chimie de la matiere condensee de Bordeaux (ICMCB-CNRS), 87, av. du Dr. A. Schweittzer-33608 Pessac (France); Grenier, J.C. [Institut de chimie de la matiere condensee de Bordeaux (ICMCB-CNRS), 87, av. du Dr. A. Schweittzer-33608 Pessac (France); Waal, D. [Department of Chemistry, University of Pretoria, 0002 Pretoria (South Africa)

2006-12-15T23:59:59.000Z

306

ALS User Meeting Archives  

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

User Meeting Archives Print User Meeting Archives Print Past User Meeting Agendas, Workshops, and Awards Year Agenda Workshops David A. Shirley (Science) Klaus Halbach (Instrumentation) Tim Renner (Service) 2012 2012 User Meeting Agenda 2012 User Meeting Workshops 2012 ALS User Meeting Awards Carl Percival, Dudley Shallcross, Craig Taatjes and David Osborn (Sandia), for making the first direct measurements of the reactions of Criegee intermediates, and showing that their impact on tropospheric chemistry and climate may be substantially greater than previously assumed. 2012 ALS User Meeting Awards Jeff Dickert and Simon Morton of Berkeley Lab's Physical Biosciences Division for the invention and implementation of the Compact Variable Collimator (CVC), which has led to a dramatic increase in productivity of protein crystallography.

307

ALS Beamlines Directory  

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

Beamlines Directory Print Beamlines Directory Print Beamlines, Parameters, Contact Information, and Schedules Download a high-resolution version of the ALS Beamclock. See Beamclock to view the ALS energy-related beamlines beamclock. Beamline Parameters Beamline and endstation technical information is available through the links below. Unless otherwise noted, all beamlines are currently operational. Individual beamline schedules are posted when available. Please contact the responsible beamline scientist for additional schedule information. When calling from off-site, all beamline (BL) phone numbers that begin with a "2" are preceded by 495- (i.e., 495-2014); all others are preceded by 486-. Beamline Number Source Technique/ Group Name Energy Range Beamline Contact Schedule/BL Phone

308

ALS Beamlines Directory  

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

Beamlines Directory Print Beamlines Directory Print Beamlines, Parameters, Contact Information, and Schedules Download a high-resolution version of the ALS Beamclock. See Beamclock to view the ALS energy-related beamlines beamclock. Beamline Parameters Beamline and endstation technical information is available through the links below. Unless otherwise noted, all beamlines are currently operational. Individual beamline schedules are posted when available. Please contact the responsible beamline scientist for additional schedule information. When calling from off-site, all beamline (BL) phone numbers that begin with a "2" are preceded by 495- (i.e., 495-2014); all others are preceded by 486-. Beamline Number Source Technique/ Group Name Energy Range Beamline Contact Schedule/BL Phone

309

Preparation of PtNi Nanoparticles for the Electrocatalytic Oxidation of Methanol  

E-Print Network (OSTI)

Carbon supported PtNi nanoparticles were prepared by hydrazine reduction of Pt and Ni precursor salts under different conditions, namely by conventional heating (PtNi-1), by prolonged reaction at room temperature (PtNi-2) ...

Deivaraj, T.C.

310

Airtricity Developments NI Ltd | Open Energy Information  

Open Energy Info (EERE)

NI Ltd NI Ltd Jump to: navigation, search Name Airtricity Developments NI Ltd Place Belfast, Northern Ireland, United Kingdom Zip BT2 7AF Sector Wind energy Product Focused on construction of wind farms in Northern Ireland. Coordinates 54.595295°, -5.934524° 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":54.595295,"lon":-5.934524,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

311

Carbon Nanotube Growth Using Ni Catalyst in Different Layouts  

E-Print Network (OSTI)

Vertically aligned carbon nanotubes have been grown using Ni as catalyst by plasma enhanced chemical vapor deposition system (PECVD) in various pre-patterned substrates. Ni was thermally evaporated on silicon substrates ...

Nguyen, H. Q.

312

Magnetoelastic Coupling in NiMnGa Ferromagnetic Shape ...  

Science Conference Proceedings (OSTI)

... Magnetoelastic Coupling in NiMnGa Ferromagnetic Shape Memory Alloys. Peng Zhao (Dept. of Materials Science and ...

313

Ni spin switching induced by magnetic frustration in FeMn/Ni/Cu(001)  

SciTech Connect

Epitaxially grown FeMn/Ni/Cu(001) films are investigated by Photoemission Electron Microscopy and Magneto-Optic Kerr Effect. We find that as the FeMn overlayer changes from paramagnetic to antiferromagnetic state, it could switch the ferromagnetic Ni spin direction from out-of-plane to in-plane direction of the film. This phenomenon reveals a new mechanism of creating magnetic anisotropy and is attributed to the out-of-plane spin frustration at the FeMn-Ni interface.

Wu, J.; Choi, J.; Scholl, A.; Doran, A.; Arenholz, E.; Hwang, Chanyong; Qiu, Z. Q.

2009-03-08T23:59:59.000Z

314

Low Cost TiOLow Cost TiO22 NanoparticlesNanoparticles  

uniform TiO2 nanoparticles show great potential in numerous markets, including lighting, signage, automotive and solar energy for their excellent

315

Synthesis of Ti/TiC Composites by Mechanical Milling Followed by ...  

Science Conference Proceedings (OSTI)

carbon nanotubes were subjected to high energy ball milling followed by spark plasma sintering (SPS) to synthesize Ti composite reinforced with in-situ formed ...

316

Hydrothermal Growth of the TiO2 Nanowire Array on Ti Plates for the ...  

Science Conference Proceedings (OSTI)

Applications of the aligned TiO2 nanowire array were studied in both the photoanalytic mineralization of acetone, benzene and dye molecules in water and the ...

317

2012 ALS User Meeting Awards  

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

2 ALS User Meeting Awards 2012 ALS User Meeting Awards Print Wednesday, 10 October 2012 15:30 Recipients of the 2012 Users' Executive Committee awards and Student Poster...

318

Measurement of {sup 63}Ni and {sup 59}Ni by accelerator mass spectrometry using characteristic projectile x-rays  

Science Conference Proceedings (OSTI)

The long-lived isotopes of nickel ({sup 59}Ni, {sup 63}Ni) have current and potential use in a number of applications including cosmic radiation studies, biomedical tracing, characterization of low-level radioactive wastes, and neutron dosimetry. Methods are being developed at LLNL for the routine detection of these isotopes by AMS. One intended application is in Hiroshima dosimetry. The reaction {sup 63}Cu(n,p){sup 63}Ni has been identified as one of a small number of reactions which might be used for the direct determination of the fast neutron fluence emitted by the Hiroshima bomb. AMS measurement of {sup 63}Ni(t{sub 1/2} = 100 y) requires the chemical removal of {sup 63}Cu, which is a stable isobar of {sup 63}Ni. Following the electrochemical separation of Ni from gram-sized copper samples, the Cu concentration is further lowered to Hiroshima hypocenter. For the demonstration samples, the Cu content was chemically reduced by a factor of 10{sup 12} with quantitative retention of {sup 63}Ni. Detection sensitivity (3{sigma}) was {approximately}20 fg {sup 63}Ni in 1 mg Ni carrier ({sup 63}Ni/Ni {approx} 2 x 10{sup -11}). Significant improvements in sensitivity are expected with planned incremental changes in the methods. Preliminary results indicate that a similar sensitivity is achievable for {sup 59}Ni (t{sub 1/2} = 10{sup 5} y).

McAninch, J.E.; Hainsworth, L.J.; Marchetti, A.A. [and others

1996-05-01T23:59:59.000Z

319

Negative ion photodetachment spectroscopy of the Al3O2 , Al3O3 , Al4Ox , Al5Ox (x = 35), Al6O5 , and Al7O5 clusters  

E-Print Network (OSTI)

Negative ion photodetachment spectroscopy of the Al3O2 , Al3O3 , Al4Ox , Al5Ox (x = 3­5), Al6O5 , and Al7O5 clusters Giovanni Meloni, Michael J. Ferguson and Daniel M. Neumark Department of Chemistry as an Advance Article on the web 9th September 2003 The Al3O2 , Al3O3 , Al4Ox , Al5Ox (x ¼ 3­5), Al6O5 , and Al7

Neumark, Daniel M.

320

Low Cycle Fatigue of NiAl Deformed Near the Brittle-to-Ductile ...  

Science Conference Proceedings (OSTI)

percentage of intergranular failure decreased in the fracture morphology of both the monotonic and ... and the percentage of transgranular fracture increases [6].

Note: This page contains sample records for the topic "ni ti al" 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

Structure and Elastic Properties of Ni3Al Based Super Alloys under ...  

Science Conference Proceedings (OSTI)

Influence of Different Cooling Structure on Surface Crack of HSLA Steel Plate by ... of Si3N4-SiC Heat Absorption Ceramic Material Used for Tower Type Solar ...

322

164 Characteristics of Al0.3CoCrFeNiCx High Entropy Alloys  

Science Conference Proceedings (OSTI)

... of LiMnxFe1-xPO4 Glass and Glass-Ceramics for Lithium Ion Battery .... and Comparing the Inhibition Effect of Chromate, Bromate and Molybdate on the ...

323

152 Comparative Analysis of NiAl Alloys Used as Resistant Coating ...  

Science Conference Proceedings (OSTI)

... of LiMnxFe1-xPO4 Glass and Glass-Ceramics for Lithium Ion Battery .... and Comparing the Inhibition Effect of Chromate, Bromate and Molybdate on the ...

324

Effects of Al on the Creep Behavior and Microstructures in a (Ni,Fe ...  

Science Conference Proceedings (OSTI)

In order to improve the thermal ef?ciency of fossil-energy power plants and ..... was supported ?nancially by the US Department of Energy (DOE), Office of Fossil .

325

A-57: The High Temperature Oxidation Behavior of Ni-Cr-Al Powder ...  

Science Conference Proceedings (OSTI)

... as Shielding Materials for Electromagnetic Interference and Radiation Shielding ... for Nuclear Power Plant Steam Generators during Cold-Working Process.

326

High Temperature Compressive Behavior of Ni-Fe-Cr-Al Powder ...  

Science Conference Proceedings (OSTI)

K2: Microstructural Development of Plutonium Alloys via Cooling Curve Analysis · K3: Preparation of High Purity Tellurium by Zone Refining Process.

327

AlMnCrCuFeNi Multicomponent Alloy with Superior Hardness and ...  

Science Conference Proceedings (OSTI)

The optical and electronic microscopy analysis of the remelted alloy indicated a dendritic ... Processing and Mechanical Behavior of Unalloyed Plutonium.

328

Influence of Al on the growth of NiSi2 on Si(001)  

Science Conference Proceedings (OSTI)

Thin films of different atomic ratios of nickel and aluminium were deposited on Si(001)-wafers by magnetron cosputtering. The content of deposited nickel complies to layer thickness of about 20nm. After deposition the samples were annealed between 500 ... Keywords: Aluminium, Intermetallics, Nickel, Nickel disilicide, RBS, Silicon, TEM

F. Allenstein; L. Budzinski; D. Hirsch; A. Mogilatenko; G. Beddies; R. Grötzschel; H. -J. Hinneberg

2005-12-01T23:59:59.000Z

329

Mechanical Properties of Al-Ni-Zr Bulk Metallic Glasses Interpreted ...  

Science Conference Proceedings (OSTI)

Symposium, M. Bulk Metallic Glasses, Nanocrystalline Materials, and ... Application of Metallic Glass for High Performance Si Solar Cell: Oxidation Behavior of ...

330

Catalytic Properties of Ni3Al Foils for Methane Steam Reforming  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, The 8th Pacific Rim International Congress on Advanced Materials and Processing. Symposium, A. Materials for Energy.

331

Particle Size Dependence on Magnetic Properties of AlNiCo Powders  

Science Conference Proceedings (OSTI)

Symposium, Magnetic Materials for Energy Applications IV ... New generation of electric motors require permanent magnets with better coercivity and magnetic flux. ... Recent Developments in Rare Earth Lean/Free High Energy Magnets.

332

M6: Microhardness Behavior of Nanocrystals Dispensed Al-Ni-Si ...  

Science Conference Proceedings (OSTI)

The associated microstructure was also investigated by scanning electron microscope (SEM); the matrix with nanocrystals were firstly milled by focused ion  ...

333

"Bithermal" Thermomechanical Fatigue Behavior of a NiCoCrAlY ...  

Science Conference Proceedings (OSTI)

weak and ductile. The bithermal .... 4 shows the link between 650°C LCF ... weaker, largely a mechanical effect. Because the coating is large inelastic strains

334

Cyclic Deformation Behavior of Aged FeNiCoAlTa Single Crystals  

Science Conference Proceedings (OSTI)

Dog-bone shaped specimens were tested up to 100 cycles after different aging heat treatments in order to characterize the cyclic stress-strain response and ...

335

Electrical Resistivities of La55Al25Ni10Cu10 Bulk Metallic Glasses ...  

Science Conference Proceedings (OSTI)

Abstract Scope, Electrical resistivity measurements in comparison with ... The in- situ electrical resistivity data recorded in the annealing process show the same ...

336

Corrosion and Cytotoxicity of a Ni-free Zr-Al-Fe-Cu Bulk Metallic Glass  

Science Conference Proceedings (OSTI)

Corrosion resistance was studied using polarization technique in phosphate buffered saline solution ... Cell viability, adhesion, morphology, and proliferation of osteoblasts, endothelial cells and .... Joining of Active Bulk Metallic Glasses in Air.

337

2013 ALS User Meeting Highlights  

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

2013 ALS User Meeting Highlights 2013 ALS User Meeting Highlights 2013 ALS User Meeting Highlights Print This year's ALS User Meeting launched with a welcome from Users' Executive Committee Chair Corie Ralston and LBNL Director Paul Alivisatos. ALS Director Roger Falcone followed with a "state of the ALS" presentation that began with a reminder of the ALS mission, which he noted remains true even in the midst of a government shutdown: "Supporting users in doing outstanding science in a safe environment." Falcone gave the 414 meeting attendees an update on the ALS beamlines, which included good news about increased user numbers thanks to the new RAPIDD access system, enhanced robotics, and remote capabilities. Falcone reflected that ALS metrics continue to represent our highly productive users-the number of journal articles and papers per user that come from ALS research have continued to grow in the past year. Looking forward, Falcone touched on how a proposed ALS upgrade to a diffraction-limited light source would increase scientific capabilities.

338

2013 ALS User Meeting Highlights  

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

2013 ALS User Meeting Highlights 2013 ALS User Meeting Highlights 2013 ALS User Meeting Highlights Print Thursday, 24 October 2013 09:06 This year's ALS User Meeting launched with a welcome from Users' Executive Committee Chair Corie Ralston and LBNL Director Paul Alivisatos. ALS Director Roger Falcone followed with a "state of the ALS" presentation that began with a reminder of the ALS mission, which he noted remains true even in the midst of a government shutdown: "Supporting users in doing outstanding science in a safe environment." Falcone gave the 414 meeting attendees an update on the ALS beamlines, which included good news about increased user numbers thanks to the new RAPIDD access system, enhanced robotics, and remote capabilities. Falcone reflected that ALS metrics continue to represent our highly productive users-the number of journal articles and papers per user that come from ALS research have continued to grow in the past year. Looking forward, Falcone touched on how a proposed ALS upgrade to a diffraction-limited light source would increase scientific capabilities.

339

Comparison of Three Ni-Hard I Alloys  

Office of Scientific and Technical Information (OSTI)

Comparison of Three Ni-Hard I Alloys Comparison of Three Ni-Hard I Alloys Ă–. N. Do-an 1 , J.A. Hawk 1 , and J.Rice 2 1 U.S. Department of Energy, Albany Research Center, Albany, Oregon 2 Texaloy Foundry Co., Inc., Floresville, Texas Keywords: Ni-Hard white irons, Bainite, Martensite, Austenite, Abrasion resistant iron Abstract This report documents the results of an investigation which was undertaken to reveal the similarities and differences in the mechanical properties and microstructural characteristics of three Ni-Hard I alloys. One alloy (B1) is ASTM A532 class IA Ni-Hard containing 4.2 wt. pct. Ni. The second alloy (B2) is similar to B1 but higher in Cr, Si, and Mo. The third alloy (T1) also falls in the same ASTM specification, but it contains 3.3 wt. pct. Ni. The alloys were evaluated in both as-cast and

340

Synthesis and characterization of T[Ni(CN){sub 4}].2pyz with T=Fe, Ni; pyz=pyrazine: Formation of T-pyz-Ni bridges  

Science Conference Proceedings (OSTI)

The formation of T-pyz-Ni bridges (pyz=pyrazine) in the T[Ni(CN){sub 4}].2pyz series is known for T=Mn, Zn, Cd and Co but not with T=Fe, Ni. In this contribution the existence of such bridges also for T=Fe, Ni is discussed. The obtained pillared solids, T[Ni(CN){sub 4}].2pyz, were characterized from XRD, TG, UV-Vis, IR, Raman, Moessbauer and magnetic data. Their crystal structures were refined in the orthorhombic Pmna space group from XRD powder patterns. The structural behavior of these solids on cooling down to 77 K was also studied. In the 180-200 K temperature range the occurrence of a structural transition to a monoclinic structure (P2{sub 1}/c space group) was observed. No temperature induced spin transition was observed for Fe[Ni(CN){sub 4}].2pyz. The iron (II) was found to be in high spin electronic state and this configuration is preserved on cooling down to 2 K. The magnetic data indicate the occurrence of a low temperature weak anti-ferromagnetic interaction between T metal centers within the T[Ni(CN){sub 4}] layer. In the paramagnetic region for Ni[Ni(CN){sub 4}].2pyz, a reversible temperature induced spin transition for the inner Ni atom was detected. - Graphical abstract: Rippled sheets structure for the pillared solids T[Ni(CN){sub 4}].2pyz. The pyrazine molecule is found forming T-pyz-Ni bridges between neighboring layers. Highlights: > Pillared 2D solids. > Inorganic-organic solids. > Assembling of molecular blocks. > From 1D and 2D building blocks to 3D solids.

Lemus-Santana, A.A. [Center for Applied Science and Advanced Technology, Legaria Unit, National Polytechnic Institute of Mexico, Mexico D.F. (Mexico); Rodriguez-Hernandez, J. [Center for Applied Science and Advanced Technology, Legaria Unit, National Polytechnic Institute of Mexico, Mexico D.F. (Mexico); Institute of Materials Science and Technology, University of Havana (Cuba); Gonzalez, M. [Center for Applied Science and Advanced Technology, Legaria Unit, National Polytechnic Institute of Mexico, Mexico D.F. (Mexico); Demeshko, S. [Institut fuer Anorganische Chemie, Georg-August-Universitaet Goettingen, Tammannstrasse 4, 37077 Goettingen (Germany); Avila, M. [Center for Applied Science and Advanced Technology, Legaria Unit, National Polytechnic Institute of Mexico, Mexico D.F. (Mexico); Knobel, M. [Institute of Physics 'Gleb Wataghin', UNICAMP, 13083-970 Campinas, SP (Brazil); Reguera, E., E-mail: ereguera@yahoo.com [Center for Applied Science and Advanced Technology, Legaria Unit, National Polytechnic Institute of Mexico, Mexico D.F. (Mexico)

2011-08-15T23:59:59.000Z

Note: This page contains sample records for the topic "ni ti al" 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.


341

Spectral Content of 22Na/44Ti Decay Data: Implications for a Solar Influence  

E-Print Network (OSTI)

We report a reanalysis of data on the measured decay rate ratio $^{22}$Na/$^{44}$Ti which were originally published by Norman et al., and interpreted as supporting the conventional hypothesis that nuclear decay rates are constant and not affected by outside influences. We find upon a more detailed analysis of both the amplitude and the phase of the Norman data that they actually favor the presence of an annual variation in $^{22}$Na/$^{44}$Ti, albeit weakly. Moreover, this conclusion holds for a broad range of parameters describing the amplitude and phase of an annual sinusoidal variation in these data. The results from this and related analyses underscore the growing importance of phase considerations in understanding the possible influence of the Sun on nuclear decays. Our conclusions with respect to the phase of the Norman data are consistent with independent analyses of solar neutrino data obtained at Super-Kamiokande-I and the Sudbury Neutrino Observatory (SNO).

Daniel O'Keefe; Brittany L. Morreale; Robert H. Lee; John B. Buncher; Ephraim Fischbach; Tom Gruenwald; Jere H. Jenkins; Daniel Javorsek II; Peter A. Sturrock

2012-12-10T23:59:59.000Z

342

High Energy Density Na-S/NiCl2 Hybrid Battery  

SciTech Connect

High temperature (250-350°C) sodium-beta alumina batteries (NBBs) are attractive energy storage devices for renewable energy integration and other grid related applications. Currently, two technologies are commercially available in NBBs, e.g., sodium-sulfur (Na-S) battery and sodium-metal halide (ZEBRA) batteries. In this study, we investigated the combination of these two chemistries with a mixed cathode. In particular, the cathode of the cell consisted of molten NaAlCl4 as a catholyte and a mixture of Ni, NaCl and Na2S as active materials. During cycling, two reversible plateaus were observed in cell voltage profiles, which matched electrochemical reactions for Na-S and Na-NiCl2 redox couples. An irreversible reaction between sulfur species and Ni was identified during initial charge at 280°C, which caused a decrease in cell capacity. The final products on discharge included Na2Sn with 1< n < 3, which differed from Na2S3 found in traditional Na-S battery. Reduction of sulfur in the mixed cathode led to an increase in overall energy density over ZEBRA batteries. Despite of the initial drop in cell capacity, the mixed cathode demonstrated relatively stable cycling with more than 95% of capacity retained over 60 cycles under 10mA/cm2. Optimization of the cathode may lead to further improvements in battery performance.

Lu, Xiaochuan; Lemmon, John P.; Kim, Jin Yong; Sprenkle, Vincent L.; Yang, Zhenguo (Gary) [Gary

2013-02-15T23:59:59.000Z

343

Das Leben als Krankheit: Kafkas Ein Landarzt  

E-Print Network (OSTI)

Das Leben als Krankheit. Franz Kafkas Ein Landarzt Muhammedsei. Die menschliche Existenz als eine unheilbare Krankheit:Vorstellung vom Menschen als Be- herrscher seines Lebens.

Al-Azzawi, Muhammed

2011-01-01T23:59:59.000Z

344

Joint SSRTNet/ALS-MES Workshop report  

E-Print Network (OSTI)

conclusion of his SRRTNet/ALS-MES Workshop presentation inJoint SSRTNet/ALS-MES Workshop This joint workshop broughtthe Advanced Light Source (ALS) Users’ Association Annual

Shuh, David; Van Hove, Michel

2001-01-01T23:59:59.000Z

345

ALS Beamline Design Requirements - Revision 1  

E-Print Network (OSTI)

materials are not allowed in the ALS experiment area withoutlocations provided by the ALS. c. Cleaning proceduresa successful walkthrough, the ALS Director or designee gives

Heimann, Phil

2010-01-01T23:59:59.000Z

346

Promising Magnesium Battery Research at ALS  

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

AdvancedLightSource Home Science Highlights Industry @ ALS Promising Magnesium Battery Research at ALS Promising Magnesium Battery Research at ALS Print Wednesday, 23...

347

Stripe-to-bubble transition of magnetic domains at the spin reorientation of (Fe/Ni)/Cu/Ni/Cu(001)  

Science Conference Proceedings (OSTI)

Magnetic domain evolution at the spin reorientation transition (SRT) of (Fe/Ni)/Cu/Ni/Cu(001) is investigated using photoemission electron microscopy. While the (Fe/Ni) layer exhibits the SRT, the interlayer coupling of the perpendicularly magnetized Ni layer to the (Fe/Ni) layer serves as a virtual perpendicular magnetic field exerted on the (Fe/Ni) layer. We find that the perpendicular virtual magnetic field breaks the up-down symmetry of the (Fe/Ni) stripe domains to induce a net magnetization in the normal direction of the film. Moreover, as the virtual magnetic field increases to exceed a critical field, the stripe domain phase evolves into a bubble domain phase. Although the critical field depends on the Fe film thickness, we show that the area fraction of the minority domain exhibits a universal value that determines the stripe-to-bubble phase transition.

Wu, J.; Choi, J.; Won, C.; Wu, Y. Z.; Scholl, A.; Doran, A.; Hwang, Chanyong; Qiu, Z.

2010-06-09T23:59:59.000Z

348

ENVIRONMENT AL REVI  

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

ENVIRONMENT ENVIRONMENT AL REVI EW for CATEG ORI CAL EXCLUS ION DETE RMINATION Rocky Mo unta in Region, Weste rn A rea Power Administra tion Stru cture Replace ment Fla min g Go rge-Vern a l No.3 138-kV tra nsmiss ion lin e (Struct ure No. 25/6) Spr ing 201 2 A. Ilricf J)cscription of Proposal: Western Area Power Adm inistration (Western) proposes to replace Structure No. 25/6 on the Flaming Gorge-Vernal No.3 138-kV transmission line. The structure is located on Bureau of Land Management lands in Uintah County. Utah (Township 3S, Range 22E, Section 7; Donkey Flat 7.5' USGS quadrangle). Work consists of removal and in-kind replacement of the wood H-frame structure and anchors utilizing rubber tired vehicles. crane, bucket truck, pole trucks/trailers, auger rig. and pick-up trucks. All work will be conducted on Western's existing

349

ALS Scientific Advisory Committee Charter  

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

This document was revised and approved December 18, 2008. I. FUNCTION AND REPORTING The ALS Scientific Advisory Committee (SAC) is advisory to the Berkeley Lab Director through...

350

2012 ALS User Meeting Highlights  

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

and notable science highlights, which communicated ALS advances in structural biology, battery research, and fundamental science. Falcone acknowledged the work of Simon Morton and...

351

Microsoft Word - NiR.doc  

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

Side-on Cu-Nitrosyl Coordination by Nitrite Reductase Side-on Cu-Nitrosyl Coordination by Nitrite Reductase Elitza I. Tocheva and Michael E. P. Murphy Department of Microbiology & Immunology, The University of British Columbia, Vancouver, BC, Canada V6T 1Z3. Nitric oxide (NO) is one of the smallest and simplest biologically active molecules. In mammals, NO is produced from arginine by isoforms of nitric oxide synthase, and it func- tions in signal transduction and as a cytoprotective or cytotoxic agent. In bacteria, NO is produced by nitrite reductase (NiR), a copper-containing enzyme, which is responsible for the reduction of nitrite to nitric oxide (NO) in the process of dissimilatory denitrification. Cu- containing NiRs are homotrimers with two distinct Cu sites per monomeric unit (1). The type

352

SF 6432-NI (04-95)  

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

6/14/11 6/14/11 Page 1 of 14 Printed copies of this document are uncontrolled. Retrieve latest version electronically. SF 6432-NI (06/14/11) SECTION II STANDARD TERMS AND CONDITIONS FOR FIXED PRICE CONTRACTS WITH THE NEWLY INDEPENDENT STATES OF THE FORMER SOVIET UNION INDEX OF CLAUSES. THE FOLLOWING CLAUSES APPLY TO REQUESTS FOR QUOTATION AND CONTRACTS 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. NI01 - ACCEPTANCE OF TERMS AND CONDITIONS Contractor, by signing this Agreement, beginning performance, and/or delivering Items or services ordered under this Agreement, agrees to comply with all the terms and conditions and all specifications and other documents that this Contract incorporated by

353

Measurement of {sup 63}Ni and {sup 59}Ni by accelerator mass spectrometry using characteristic projectile x-rays  

SciTech Connect

The long-lived isotopes of nickel ({sup 59}Ni, {sup 63}Ni) have current and potential use in a number of applications including cosmic radiation studies, biomedical tracing, characterization of low-level radioactive wastes, and neutron dosimetry. Methods are being developed at LLNL for the routine detection of these isotopes by AMS. One intended application is in Hiroshima dosimetry. The reaction {sup 63}Cu(n,p){sup 63}Ni has been identified as one of a small number of reactions which might be used for the direct determination of the fast neutron fluence emitted by the Hiroshima bomb. AMS measurement of {sup 63}Ni(t{sub 1/2} = 100 y) requires the chemical removal of {sup 63}Cu, which is a stable isobar of {sup 63}Ni. Following the electrochemical separation of Ni from gram-sized copper samples, the Cu concentration is further lowered to < 2 x 10{sup -8} (Cu/Ni) using the reaction of Ni with carbon monoxide to form the gas Ni(CO){sub 4}. The Ni(CO){sub 4} is thermally decomposed directly in sample holders for measurement by AMS. After analysis in the AMS spectrometer, the ions are identified using characteristic projectile x-rays, allowing further rejection of remaining {sup 63}Cu. In a demonstration experiment, {sup 63}Ni was measured in Cu wires (2-20 g) which had been exposed to neutrons from a {sup 252}Cf source. We successfully measured {sup 63}Ni at levels necessary for the measurement of Cu samples exposed near the Hiroshima hypocenter. For the demonstration samples, the Cu content was chemically reduced by a factor of 10{sup 12} with quantitative retention of {sup 63}Ni. Detection sensitivity (3{sigma}) was {approximately}20 fg {sup 63}Ni in 1 mg Ni carrier ({sup 63}Ni/Ni {approx} 2 x 10{sup -11}). Significant improvements in sensitivity are expected with planned incremental changes in the methods. Preliminary results indicate that a similar sensitivity is achievable for {sup 59}Ni (t{sub 1/2} = 10{sup 5} y).

McAninch, J.E.; Hainsworth, L.J.; Marchetti, A.A. [and others

1996-05-01T23:59:59.000Z

354

TiSol | Open Energy Information  

Open Energy Info (EERE)

TiSol TiSol Jump to: navigation, search Name TiSol Place Pasadena, California Sector Solar Product California-based start up focused on the production of dye sensitized solar cells. Coordinates 29.690847°, -95.196308° 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":29.690847,"lon":-95.196308,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

355

Properties of Ti-5Al-5Mo-5V-3Cr Samples Produced via Powder Hot ...  

Science Conference Proceedings (OSTI)

Feb 1, 2010 ... If the price of this product displays as $0.00 for your customer category, you may download it for free. You must, however, add it to your cart and ...

356

Towards Understanding the Tool Demands for HSM of Ti6Al4V  

Science Conference Proceedings (OSTI)

Challenges in Applying Diamond Coatings to Carbide Twist Drills ... Investigation of a Hybrid Cutting Tool Design for Shearing Operations of Sheet Metals.

357

Microstructure and Properties of Laser Shock Processed Ti6Al4V ...  

Science Conference Proceedings (OSTI)

Phase Change Materials in Thermal Energy Storage for Concentrating Solar Power (CSP) · Phase Diagram Calculation and Its Applications to Materials Design ...

358

Hot Deformation Behavior of Ti-6Al-4V Alloy with a' Martensite ...  

Science Conference Proceedings (OSTI)

... Corrosion Inhibition for Hydrochloric Acid Pickling · Using Resistance Heating to Create Full-Scale API RP2Z CTOD Samples ...

359

Development Pathways to Low-Cost Engineering Beta Gamma TiAl ...  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, 2010 TMS Annual Meeting & Exhibition. Symposium , Cost-Affordable Titanium III. Presentation Title, Development Pathways to ...

360

Characterizing Ultrafine Grained Ti-6Al-4V Thermal Stability with ...  

Science Conference Proceedings (OSTI)

... size as a function of time and temperature, a FEG-SEM equipped with EBSD was enclosed to isolate it from thermal oscillations inherent to HVAC systems.

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


361

Microstructural Characterization of Ti-6Al-4V Metal Chips by ...  

Science Conference Proceedings (OSTI)

Research supported in part by ORNL's SHaRE User Facility, which is sponsored by the Scientific User Facilities Division, Office of ... Definite: A CD-only volume ...

362

Al 2 TiO 5 Ceramics for New Diesel Particulate Filter and High ...  

Science Conference Proceedings (OSTI)

... thermal durability, high filtration efficiency, low pressure drop-, and adequate ... In particular, DPF ideally combine low thermal expansion, low pressure drop ...

363

A-49: Precipitation Hardening Effect of Ti-Al-Mo-Fe Alloy  

Science Conference Proceedings (OSTI)

... as Shielding Materials for Electromagnetic Interference and Radiation Shielding ... for Nuclear Power Plant Steam Generators during Cold-Working Process.

364

Combustion Formation of Ti2AlC MAX Phase by Electro-Plasma ...  

Science Conference Proceedings (OSTI)

The theoretical density of the powder compact was found to play an important role for the initiation of the combustion reaction. For the compacts with a higher ...

365

Development of Al-TiC Alloys Using Powder Metallurgy as Grain ...  

Science Conference Proceedings (OSTI)

The pressed specimens were sintered from 450 oC in a tube furnace under argon ... Corrosion Protection of Light Metals and Alloys Using Rare Earth Oxide  ...

366

Development of Ultrafine-Grained Ti-6Al-4Fe-0.25Si Alloy Without ...  

Science Conference Proceedings (OSTI)

Data Development for Modeling Heat Treatment of 7075 Aluminum Alloy Components ... Processing and Mechanical Behavior of Unalloyed Plutonium.

367

Development of Novel Gamma TiAl Alloys and Their Joining ...  

Science Conference Proceedings (OSTI)

The master alloys having ultimate strength as high as 560 MPa at 900 oC are fabricated by ... Processing and Mechanical Behavior of Unalloyed Plutonium.

368

Lamella Refining Mechanism of TiAl-based Alloys by Different Heat ...  

Science Conference Proceedings (OSTI)

... 1450? by different ways, like furnace cooling, air cooling and oil quenching. ... Study Of The Effect Of Machine Induced Notch And Foreign Object Damage ...

369

Property Investigation of Ti-Al6-V4 Produced by Additive ...  

Science Conference Proceedings (OSTI)

May 1, 2007 ... A correlation to chevron test samples was made in an attempt to reduce necessary sample size. The paper discusses micro-structural features, ...

370

I11 Self-Accommodation Morphology in Ti-Nb-Al Shape Memory Alloy  

Science Conference Proceedings (OSTI)

A37 Unconventional Method of Nitriding of 316l Austenitic Steel · A38 Role of ..... I24 The Study of Cotton Finishing by Artemsia Argyi Oil Microcapsules.

371

Crack-resistance Curve of a Zr-Ti-Cu-Al Bulk Metallic Glass with ...  

Science Conference Proceedings (OSTI)

Symposium, M. Bulk Metallic Glasses, Nanocrystalline Materials, and ... Application of Metallic Glass for High Performance Si Solar Cell: Oxidation Behavior of ...

372

Phase Field Modeling of Beta to Alpha Transformations in Ti-6Al-4V  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, 2011 TMS Annual Meeting & Exhibition. Symposium , Hume-Rothery Symposium Thermodynamics and Diffusion Coupling in Alloys ...

373

Characteristics and Wear Performance of Nitrided Ti6Al7Nb  

Science Conference Proceedings (OSTI)

Fabrication of a Cellulosic Nanocomposite Scaffold with Improved Supermolecular Structure as a Potential Cardiovascular Tissue-Engineered Graft .

374

Annealed Structure of the Ti-8Al-1V-1Mo Alloy  

Science Conference Proceedings (OSTI)

Author(s), Chang-Hua Yu, Lin-Lung Wei , Chih-Yeh Chao. On-Site Speaker ... Study on Water Absorbing Behavior of Fine Ore for Sintering Process · Synergistic ...

375

Porous Rare-Earth Containing NbTiAl-Based High-entropy Materials ...  

Science Conference Proceedings (OSTI)

The filter properties for the water and air were also measured. ... Novel Self- foaming Cellular Composites Produced from Recycled Water Potabilisation Sludge.

376

Chip Formation Analysis in Laser-assisted Milling of Ti-6Al-4V  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2013. Symposium, Advanced Manufacturing Technologies. Presentation Title, Chip Formation ...

377

Characteristics and Mechanical Properties of Ti6Al4V Lattice ...  

Science Conference Proceedings (OSTI)

EBM opens up new degrees of freedom in design of complex 3D geometries, e.g. the possibility to produce parts with tailored porosity (lattice structures). Lattice ...

378

Rolling and Grinding of Thin Sheets of Beta-Solidified Gamma TiAl ...  

Science Conference Proceedings (OSTI)

Presentation Title, Rolling and Grinding of Thin Sheets of Beta-Solidified ... of process parameters for TNMB1 titanium aluminide for selective laser melting ...

379

The Numerical Analysis of Creep Deformation and Cavitation in TiAl ...  

Science Conference Proceedings (OSTI)

A.C.F. Cocks and M.F. Ahsby, Progress in Mat. Sci., 27 (1982), p. 244. 21. T.-L. Sham and A. Needleman, Acta Met. and Mat., 31 (1983), p. 919. 22. V. Tvergaard  ...

380

A Study of Crystalline-amorphous Phase Transformation of Ti75Al25 ...  

Science Conference Proceedings (OSTI)

Design and Manufacture of Fluidized Bed Reactor in Pilot Scale for Multiple ..... The Effect of Circulating Coal Slurry Water Hardness on Coal Preparation.

Note: This page contains sample records for the topic "ni ti al" 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

Preliminary Research on Preparation Al-Si-Ti Alloy With Aluminum ...  

Science Conference Proceedings (OSTI)

Stabilization of Chromium-based Slags with MgO · Study on the EMD Residue and Shale for Preparing Solidification Brick · Study on the In-Situ Remediation of

382

Producing of Composite Layer of TiO2/Al5083 via Friction Stir ...  

Science Conference Proceedings (OSTI)

A Study on the Stress Test of Truck Frames for Freight Trains · A Study on the ... Defect Energetics and Fission Product Transport in ZrC · Deformation Field and ...

383

Electrochemical Preparation of Ti2AlC in Molten Chloride Bath  

Science Conference Proceedings (OSTI)

Cathodic Behavior of Silicon (?) in BaF2-CaF2 –SiO2 Melts ... Electrochemical Impedance Spectroscopy of Uranium Chloride in Molten LiCl-KCl Eutectic.

384

Thermomechanical Treatment of TiAl6V4 Alloy Fabricated by ...  

Science Conference Proceedings (OSTI)

Symposium, Advanced Materials, Processes and Applications for Additive Manufacturing ... Lubricants in Deposition and Machining of Wire and Arc Additive ...

385

Development of Methods for Production of Small Ti6Al4V Parts ...  

Science Conference Proceedings (OSTI)

Symposium, Advanced Materials, Processes and Applications for Additive Manufacturing ... Lubricants in Deposition and Machining of Wire and Arc Additive ...

386

EBM Process Temperature Study for Ti-6Al-4V Using Infrared ...  

Science Conference Proceedings (OSTI)

Symposium, Advanced Materials, Processes and Applications for Additive Manufacturing ... Lubricants in Deposition and Machining of Wire and Arc Additive ...

387

F8: Formation of Inclusion in Low C-Mn Steel by Ti-Al Complex ...  

Science Conference Proceedings (OSTI)

B17: Characteristics of Liquid Silicon Infiltrated C/C-SiC Composite Using Carbon Nano ... B29: Transport Studies of Electrodes/Electrolytes for Intermediate .... D18: Pure and Doped Ceria Nanoparticles for Green Natural Gas Combustion ... Failure Suspension Knee Bearing Used in Special Belgian Heavy Duty Trailers.

388

E29: Analysis of Fractured Ti-6Al-7Nb Collars  

Science Conference Proceedings (OSTI)

A18: Effect of Local Alendronate Delivery on In Vivo Osteogenesis From PCL ... A7: On-the-fly System Design for High Precision/Ultra Fast/Wide Area Fabrication .... C19: Dissolution Behavior of Cu Under Bump Metallization in Ball Grid Array ... High Volume and Fast Turnaround Automated Inline TEM Sample Preparation.

389

B18: Characteristics of Si-Based Alloys (Ti, Co, Al and Mo) Infiltrated ...  

Science Conference Proceedings (OSTI)

A18: Effect of Local Alendronate Delivery on In Vivo Osteogenesis From PCL ... A7: On-the-fly System Design for High Precision/Ultra Fast/Wide Area Fabrication .... C19: Dissolution Behavior of Cu Under Bump Metallization in Ball Grid Array ... High Volume and Fast Turnaround Automated Inline TEM Sample Preparation.

390

Temperature Dependent Electrical Transport Properties of Ni-Cr and Co-Cr Binary Alloys  

Science Conference Proceedings (OSTI)

The temperature dependent electrical transport properties viz. electrical resistivity and thermal conductivity of Ni{sub 10}Cr{sub 90} and Co{sub 20}Cr{sub 80} alloys are computed at various temperatures. The electrical resistivity has been calculated according to Faber-Ziman model combined with Ashcroft-Langreth partial structure factors. In the present work, to include the ion-electron interaction, we have used a well tested local model potential. For exchange-correlation effects, five different forms of local field correction functions due to Hartree (H), Taylor (T), Ichimaru and Utsumi (IU), Farid et al (F) and Sarkar et al (S) are used. The present results due to S function are in good agreement with the experimental data as compared to results obtained using other four functions. The S functions satisfy compressibility sum rule in long wave length limit more accurately as compared to T, IU and F functions, which may be responsible for better agreement of results, obtained using S function. Also, present result confirms the validity of present approach in determining the transport properties of alloys like Ni-Cr and Co-Cr.

Thakore, B. Y.; Khambholja, S. G.; Bhatt, N. K.; Jani, A. R. [Department of Physics, S P University, Vallabh Vidhyanagar, 388 120, Gujarat (India); Suthar, P. H. [Department of Physics, C U Shah Science College, Ahmedabad, 380 014, Gujarat (India); Gajjar, P. N. [Department of Physics, University Schools of Sciences, Gujarat University, Ahmedabad, 380 009, Gujarat (India)

2011-12-12T23:59:59.000Z

391

Gradual localization of Ni 3d states in LaNiO3 ultrathin films induced by dimensional crossover  

Science Conference Proceedings (OSTI)

In situ photoemission spectroscopy and x-ray absorption spectroscopy (XAS) have been performed on LaNiO3 (LNO) ultrathin films grown on LaAlO3 substrates to investigate the origin of the thickness-dependent metalinsulator transition (MIT). With decreasing film thickness, the progressive weakening of a quasiparticle peak at the Fermi level (EF ) occurs below 10 monolayer (ML), and the further depletion of spectral weight at EF leads to pseudogap behavior at 3 6 ML. The pseudogap finally evolves into a full gap, indicating that the thickness-dependent MIT takes place at a critical film thickness of 2 3 ML. The observed spectral behavior is in line with the transport properties of LNO ultrathin films. The thickness dependence of the spectral intensity is compared with realistic multiorbital dynamical mean-field theory. The experimental spectral function was found to depend on the film thickness more strongly than the theoretical one for thinner systems, indicating that the thickness-dependent MIT in LNO is caused by the crossover from three to two dimensions, during which the spatial correlations are progressively enhanced. The XAS results suggest that a charge disproportionate state is strongly suppressed in LNO ultrathin films plausibly as a result of epitaxial strain from the substrates. These results strongly suggest that a novel insulating state is realized in LNO films at a thin limit.

Sakai, E. [University of Tokyo, Tokyo, Japan; Tamamitsu, M. [University of Tokyo, Tokyo, Japan; Yoshimatsu, K [University of Tokyo, Tokyo, Japan; Okamoto, Satoshi [ORNL; Horiba, K. [University of Tokyo, Tokyo, Japan; Oshima, M [University of Tokyo, Tokyo, Japan; Kumigashira, H [University of Tokyo, Tokyo, Japan

2013-01-01T23:59:59.000Z

392

Simplified Production of Ni-Based Oxide Dispersion Strengthened  

Science Conference Proceedings (OSTI)

Austenitic Steel Oxidation in Steam: Alloy Composition and Surface Modification ... Ni-Base Alloys for Use as Components in Advanced-USC Steam Turbines.

393

Development of Ni-Fe Hydrogenation Catalyst from D. Gigas ...  

Development of Ni-Fe Hydrogenation Catalyst from D. Gigas Hydrogenase Note: The technology described above is an early stage opportunity. Licensing rights to this ...

394

Cyclic Oxidation Behavior of Detonation Gun Sprayed Ni-20Cr ...  

Science Conference Proceedings (OSTI)

Presentation Title, Cyclic Oxidation Behavior of Detonation Gun Sprayed Ni-20Cr Coating on a Boiler Steel at 900°C. Author(s), Gagandeep Kaushal, Harpreet ...

395

Hot Tearing in Directionally Solidified Ni-Based Superalloys  

Science Conference Proceedings (OSTI)

It is found that in most of the Ni-based superalloys studied there exists a critical ..... welds: minor elements do not individually cause significant increases in heat

396

Thermochemical Simulation of Cu-Ni Smelting Operations  

Science Conference Proceedings (OSTI)

As a second example, an advanced on-line thermochemical simulation of Xstrata Nickel's Sudbury Ni–Cu sulphide smelting plant will be presented. The on-line ...

397

Study of Supercritical CO2 Emulsion in Ni Electroplating and ...  

Science Conference Proceedings (OSTI)

Presentation Title, Study of Supercritical CO2 Emulsion in Ni Electroplating and Application in Fabrication of Defect-Free Micromechanical Component with High  ...

398

Carbon Fiber with Ni-Coated Reinforced Aluminum Alloy Matrix ...  

Science Conference Proceedings (OSTI)

May 1, 2007 ... Carbon Fiber with Ni-Coated Reinforced Aluminum Alloy Matrix Composites by Bianhua Han, Tianjiao Luo, Chunlin Liang,Guangchun Yao, ...

399

An Exploration of Catalytic Chemistry on Au/Ni(111)  

Science Conference Proceedings (OSTI)

This project explored the catalytic oxidation chemistry that can be effected on a Au/Ni(111) surface alloy. A Au/Ni(111) surface alloy is a Ni(111) surface on which less than 60% of the Ni atoms are replaced at random positions by Au atoms. The alloy is produced by vapor deposition of a small amount of Au onto Ni single crystals. The Au atoms do not result in an epitaxial Au overlayer or in the condensation of the Au into droplets. Instead, Au atoms displace and then replace Ni atoms on a Ni(111) surface, even though Au is immiscible in bulk Ni. The two dimensional structure of the clean Ni surface is preserved. This alloy is found to stabilize an adsorbed peroxo-like O2 species that is shown to be the critical reactant in the low temperature catalytic oxidation of CO and that is suspected to be the critical reactant in other oxidation reactions. This investigation revealed a new, practically important catalyst for CO oxidation that has since been patented.

Sylvia T. Ceyer

2011-12-09T23:59:59.000Z

400

Determination of Atomistic Structure of Ni-Base Single Crystal ...  

Science Conference Proceedings (OSTI)

l-2-1, Sengen, Tsukuba Science City, 305, Japan. *Department of ... The atomic locations of alloying elements in some Ni-base single crystal superalloys have ...

Note: This page contains sample records for the topic "ni ti al" 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

Ni-Based Molecular Electrocatalysts for Hydrogen Oxidation  

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

Ni-Based Molecular Electrocatalysts for Hydrogen Oxidation Dan DuBois National Renewable Energy Laboratory Nicolet, Y.; de Lacey, A. L.; Vernde, X.; Fernandez, V. M.; Hatchikian,...

402

Fusion of radioactive $^{132}$Sn with $^{64}$Ni  

E-Print Network (OSTI)

Evaporation residue and fission cross sections of radioactive $^{132}$Sn on $^{64}$Ni were measured near the Coulomb barrier. A large sub-barrier fusion enhancement was observed. Coupled-channel calculations including inelastic excitation of the projectile and target, and neutron transfer are in good agreement with the measured fusion excitation function. When the change in nuclear size and shift in barrier height are accounted for, there is no extra fusion enhancement in $^{132}$Sn+$^{64}$Ni with respect to stable Sn+$^{64}$Ni. A systematic comparison of evaporation residue cross sections for the fusion of even $^{112-124}$Sn and $^{132}$Sn with $^{64}$Ni is presented.

J. F. Liang; D. Shapira; J. R. Beene; C. J. Gross; R. L. Varner; A. Galindo-Uribarri; J. Gomez del Campo; P. A. Hausladen; P. E. Mueller; D. W. Stracener; H. Amro; J. J. Kolata; J. D. Bierman; A. L. Caraley; K. L. Jones; Y. Larochelle; W. Loveland; D. Peterson

2007-04-05T23:59:59.000Z

403

Microstructure Control of Ni Base Alloys with High Volume Fraction ...  

Science Conference Proceedings (OSTI)

hypo-stoichiometric composition of Ni3V, formation of "multi- variant structure ... reasons; one is the high TC (1318 K) at its stoichiometric composition [1, 2], and ...

404

NREL Improves Hole Transport in Sensitized CdS?NiO Nanoparticle...  

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

effective sensitizing dyes for p-type NiO. One of the factors limiting the use of NiO for solar cell application is the low hole conductivity in p-NiO. A team of researchers from...

405

El Ni~no and La Ni~na: Causes and Global Consequences Michael J McPhaden  

E-Print Network (OSTI)

of an El Niño, the Aleutian low pressure system tends to be larger and more intense than in other years

406

Kinetics of Ni Sorption in Soils: Roles of Soil Organic Matter and Ni Precipitation  

E-Print Network (OSTI)

Aqueous Model (WHAM),6,20 which is able to account for the effects of solution chemistry and SOM WHAM VI was integrated into the kinetics model to account for the effects of SOM concentrations by an electrostatic model built in WHAM VI for cation exchange on clay minerals. Ni precipitation kinetics were

Sparks, Donald L.

407

Soham Al Snih Al Snih, MD., PhD. Curriculum Vitae CURRICULUM VITAE  

E-Print Network (OSTI)

Soham Al Snih Al Snih, MD., PhD. Curriculum Vitae 1 CURRICULUM VITAE NAME: Soham Al Snih Al Snih, M at the Sealy Center on Aging, University of Texas Medical Branch, Galveston, TX. #12;Soham Al Snih Al Snih, MD arthritis. B. Grant Support Current Grant Support: 1R03 AG029959-01A2 (Al Snih ­PI) Period: 06

Wood, James B.

408

AL PRO | Open Energy Information  

Open Energy Info (EERE)

AL PRO AL PRO Jump to: navigation, search Name AL-PRO Place Grossheide, Lower Saxony, Germany Zip 26532 Sector Wind energy Product AL-PRO is an inndependent expert office for wind forecasts, wind potential studies, turbulence inquiries, visualizations as well as sound and shade throw forecasts Coordinates 53.592743°, 7.34313° 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":53.592743,"lon":7.34313,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

409

Rejuvenation of Ni-based Superalloys GTD444(DS) and René N5(SX)  

Science Conference Proceedings (OSTI)

D3: Weld Solidification Behavior of Ni-base Superalloys for Use in Advanced Supercritical Coal-fired Power Plants · D4: Sputtered Ni-base Superalloys for ...

410

Ni-Base Alloys for Use as Components in Advanced-USC Steam ...  

Science Conference Proceedings (OSTI)

Symposium, Properties, Processing, and Performance of Steels and Ni-Based Alloys for Advanced Steam Conditions. Presentation Title, Ni-Base Alloys for Use

411

Measurement of the 44Ti(alpha,p)47V reaction cross section, of relevance to gamma-ray observation of core collapse supernovae, using reclaimed 44Ti.  

E-Print Network (OSTI)

Measurement of the 44Ti(alpha,p)47V reaction cross section, of relevance to gamma-ray observation of core collapse supernovae, using reclaimed 44Ti.

Murphy, AStJ; Ayranov, M; Bastin, B; Bemmerer, D; Bingham, R; Bunka, M; Butler, P; Catherall, R; Cocolios, TE; Davinson, T; Delahaye, P; Dorsival, A; Dressler, R; van Duppen, P; Fallis, J; Fox, S; Fulton, BR; Kowalska, M; Laird, A; Lotay, G; Saint Laurent, MG; Marin, A; Mendonca1, JT; de Oliveira, F; Roger, T; Ruiz, C; Sahin, L; Schumann, D; de Sereville1, N; Sorlin, O; Stora, T; Traykov, E; Voulot, D; Wang, C HT; Wenander, FJC; Woods, PJ

2012-01-01T23:59:59.000Z

412

Low temperature epitaxial growth of Ge on cube- textured Ni  

SciTech Connect

Quasi- single crystal Ge films were grown on [001]<010> textured Ni substrate at a temperature of 350 oC using an insulating buffer layer of CaF2. A direct deposition of Ge on Ni at 350 oC was shown to alloy with Ni. From x- ray pole figure analysis, it was shown that Ge grew epitaxially with the same orientation as CaF2 and the dispersions in the out- of- plane and in- plane directions were found to be 1.7 0.1o and 6 1o, respectively. In the out- of- plane direction, Ge[111]||CaF2[111]||Ni[001]. In addition, the Ge consisted of four equivalent in- plane oriented domains such that two mutually orthogonal directions: Ge 211 and Ge 011 are parallel to mutually orthogonal directions: Ni 110 and Ni 110 , respectively of the Ni(001) surface. This was shown to be originated from the four equivalent in- plane oriented domains of CaF2 created to minimize the mismatch strain between CaF2 and Ni in those directions.

GIARE, C [Rensselaer Polytechnic Institute (RPI); Palazzo, J [Rensselaer Polytechnic Institute (RPI); Goyal, Amit [ORNL; WANG, G [Rensselaer Polytechnic Institute (RPI); LU, T [Rensselaer Polytechnic Institute (RPI)

2012-01-01T23:59:59.000Z

413

Ultrathin Silver Films on Ni(111)  

SciTech Connect

The growth and atomic structure of ultrathin silver films on Ni(111) was investigated by low-energy electron microscopy and diffraction (LEEM/LEED) as well as intensity-voltage [I(V)]-LEEM in the growth temperature range between 470 and 850 K. We find that silver grows in a Stranski-Krastanov mode with a two monolayer thin wetting layer which takes on a p(7 x 7) reconstruction at temperatures lower than 700 K and a ({radical}52 x {radical}52)R13.9{sup o} reconstruction at higher temperatures. The occurrence of the two distinct reconstructions is shown to have profound implications for the growth characteristics of films exhibiting thicknesses of one and two monolayers. The nanoscale I(V) characteristics of the films were analyzed by means of multiple-scattering calculations based on dynamical LEED theory. Furthermore, the vertical interatomic spacing at the interface between the Ag film and the Ni substrate was determined to (2.8 {+-} 0.1) {angstrom} for all film thicknesses (<13 ML) while the uppermost silver layer relaxes by about (4 {+-} 1)% toward the crystal.

Meyer, A.; Flege, J; Rettew, R; Senanayake, S; Schmidt, T; Alamgir, F; Falta, J

2010-01-01T23:59:59.000Z

414

Ultrathin Silver Films on Ni(111)  

SciTech Connect

The growth and atomic structure of ultrathin silver films on Ni(111) was investigated by low-energy electron microscopy and diffraction (LEEM/LEED) as well as intensity-voltage [I(V)]-LEEM in the growth temperature range between 470 and 850 K. We find that silver grows in a Stranski-Krastanov mode with a two monolayer thin wetting layer which takes on a p(7 x 7) reconstruction at temperatures lower than 700 K and a ({radical}52 x {radical}52)R13.9{sup o} reconstruction at higher temperatures. The occurrence of the two distinct reconstructions is shown to have profound implications for the growth characteristics of films exhibiting thicknesses of one and two monolayers. The nanoscale I(V) characteristics of the films were analyzed by means of multiple-scattering calculations based on dynamical LEED theory. Furthermore, the vertical interatomic spacing at the interface between the Ag film and the Ni substrate was determined to (2.8 {+-} 0.1) {angstrom} for all film thicknesses (<13 ML) while the uppermost silver layer relaxes by about (4 {+-} 1)% toward the crystal.

Flege, J.I.; Senanayake, S.; Meyer, A.; Rettew, R.E.; Schmidt, T.; Alamgir, F.M.; Falta, J.

2010-08-16T23:59:59.000Z

415

Evaluation of electron capture reaction rates in Ni isotopes in stellar environments  

SciTech Connect

Electron capture rates in Ni isotopes are studied in stellar environments, that is, at high densities and high temperatures during the core-collapse and postbounce explosive nucleosynthesis in supernovae. Reaction rates in {sup 58}Ni and {sup 60}Ni, as well as in {sup 56}Ni, {sup 62}Ni, and {sup 64}Ni, are evaluated by shell-model calculations with the use of a new shell-model Hamiltonian in the fp shell, GXPF1J. While the previous shell-model calculations failed to reproduce the measured peaks of Gamow-Teller strength in {sup 58}Ni and {sup 60}Ni, the present new Hamiltonian is found to reproduce them very well, as well as the capture rates obtained from the observed strengths. Strengths and energies of the Gamow-Teller transitions in {sup 56}Ni, {sup 62}Ni, and {sup 64}Ni are also found to be consistent with the observations.

Suzuki, Toshio [Department of Physics and Graduate School of Integrated Basic Sciences, College of Humanities and Sciences, Nihon University Sakurajosui 3-25-40, Setagaya-ku, Tokyo 156-8550 (Japan); Center for Nuclear Study, University of Tokyo, Hirosawa, Wako-shi, Saitama 351-0198 (Japan); National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588 (Japan); Honma, Michio [Center for Mathematical Sciences, University of Aizu, Aizu-Wakamatsu, Fukushima 965-8580 (Japan); Mao, Helene [ENSPS, Pole API-Parc d'Innovation, Boulevard Sebastien Brant, BP 10413, F-67412 Illkirch Cedex (France); Otsuka, Takaharu [Department of Physics and Center for Nuclear Study, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan); National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States); Kajino, Toshitaka [National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588 (Japan); Deaprtment of Astronomy, Graduate School of Science, University of Tokyo, Bunkyo-ku, Tokyo 113-0033 (Japan)

2011-04-15T23:59:59.000Z

416

On the Security of Liaw et al.'s Scheme  

E-Print Network (OSTI)

Recently, Liaw et al. proposed a remote user authentication scheme using smartcards. They claimed a number of features of their scheme, e.g. a dictionary of verification tables is not required to authenticate users; users can choose their password freely; mutual authentication is provided between the user and the remote system; the communication cost and the computational cost are very low; users can update their password after the registration phase; a session key agreed by the user and the remote system is generated in every session; and the nonce-based scheme which does not require a timestamp (to solve the serious time synchronization problem) etc. In this paper We show that Liaw et al.'s scheme does not stand with various security requirements and is completely insecure. Keywords: Authentication, Smartcards, Remote system, Attack.

Awasthi, Amit K

2008-01-01T23:59:59.000Z

417

L Al N l D t N dLos Alamos Nuclear Data Needs and Activities From Experiment  

E-Print Network (OSTI)

Security, LLC for NNSA U N C L A S S I F I E D Slide 2 #12;The Nuclear Data Enterprise at Los Alamos) · responsible for maintaining the safety, security, and reliability of the i ' l k ilnation's nuclear weaponsL Al N l D t N dLos Alamos Nuclear Data Needs and Activities ­ From Experiment Th h A li ti

Danon, Yaron

418

Categories of Nickel and Nickel Alloys  

Science Conference Proceedings (OSTI)

...sealing and containment equipment for liquefied natural gas, for example. The controlled thermal expansion alloys, typified by alloy 903 (Ni-42Fe-15Cu+Nb,Al,Ti), are also...

419

Met and Mat Trans Abstracts A: January 1996  

Science Conference Proceedings (OSTI)

A modified room temperature isotherm in the Al-Ti-Ni ternary system is ... The presence of the dispersoids increases the alloy's resistance to ..... In both composites, the fiber-matrix interphases include approximately 3-µm-thick carbon

420

Impact of superbends at the ALS  

E-Print Network (OSTI)

the prototype [2] . At the ALS injection is made off axis inField Bend Magnet for the ALS", in the Proceedings of theto zero. [5)At present the ALS operates with the dispersion

Nishmura, H.

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ni ti al" 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.


421

Compton Scattering in the ALS Booster  

E-Print Network (OSTI)

Compton Scattering in the ALS Booster D. Robin, C. Kim, and410 COMPTON SCATTERING IN THE ALS BOOSTER* D. Robin, C. Kim,COMPTON SCATTERING IN THE ALS BOOSTER* D. Robin, C. Kim, and

Robin, David

2008-01-01T23:59:59.000Z

422

Spin Spectrometer at the ALS and APS  

E-Print Network (OSTI)

5 Spin Spectrometer at the ALS and APS-NIM/SRI07 Figure 3 Ancollected on Beamline 7 at the ALS is shown here. The photonSpin Spectrometer at the ALS and APS-NIM/SRI07 Spin

Tobin, James G; Lawrence Livermore National Laboratory; University of Missouri-Rolla; Boyd Technologies

2008-01-01T23:59:59.000Z

423

DYNAMIC APERTURE OF THE ALS BOOSTER SYNCHROTRON  

E-Print Network (OSTI)

Nelson, "Magnetic Properties of the ALS noosler Synchrotron23,1989 Dynamic Aperture of the ALS Booster Synchrotron C.H.DYNAMIC APERTURE OF TIlE ALS BOOSTER SYNCIIROlRON· CharI""

Kim, C.H.

2010-01-01T23:59:59.000Z

424

17th Annual ALS Users' Association Meeting  

E-Print Network (OSTI)

Scientific Achievement at the ALS went to Andrea Cavalleri (with an art student's impression of the ALS (center) ;and ALS Acting Director Janos Kirz gave an overview of the

Robinson, Art; Tamura, Lori

2004-01-01T23:59:59.000Z

425

Nonlinear longitudinal dynamics studies at the ALS  

E-Print Network (OSTI)

dynamics studies at the ALS J. M. Byrd † , W-H Cheng, S.MV 4.5 mm Table 1: Nominal ALS longitudinal parameters. "in the Advanced Light Source (ALS), an electron storage ring

Byrd, J.M.; Cheng, W.-H.; De Santis, S.; Li, D.; Stupakov, G.; Zimmermann, F.

1999-01-01T23:59:59.000Z

426

Impedance Measurements of Components for the ALS  

E-Print Network (OSTI)

Impedance Measurements on the ALS Curved Sector Tank", R.A.of the Higher Order Modes of the ALS 500 MHz Acceleratingof Components for the ALS J.N. Corlett and R.A. Rimmer May

Corlett, J.N.

2011-01-01T23:59:59.000Z

427

Recent research highlights from the ALS OML  

E-Print Network (OSTI)

research highlights from the ALS OML V. V. Yashchuk, E. D.the Advanced Light Source (ALS) is to ensure state-of-the-instruments laid out in the ALS strategic plan as well as

Yashchuk, Valeriy V.

2013-01-01T23:59:59.000Z

428

ALS@20 Kick-Off Celebration  

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

ALS@20 ALS@20 Kick-Off Celebration ALS@20 Kick-Off Celebration Print On Friday, January 11, the Advanced Light Source celebrated the beginning of its 20th anniversary year with a...

429

Microsoft Word - AL2005-01.doc  

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

Letters (AL) that remain in effect are identified below. All other previously issued ALs have been superseded by a formal rule-making, incorporated into other guidance, andor...

430

Crystallographic Consulting Brings Research to the ALS  

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

Crystallographic Consulting Brings Research to the ALS Crystallographic Consulting Brings Research to the ALS Print Wednesday, 06 February 2013 15:50 cc Tom Pauly and Josh...

431

ALS Doctoral Fellowship in Residence  

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

Doctoral Fellowship in Residence Print Doctoral Fellowship in Residence Print The Advanced Light Source (ALS), a division of Lawrence Berkeley National Laboratory, is a national user facility that generates intense x-ray radiation for scientific and technological research. As the world's first third-generation synchrotron radiation source, the ALS offers outstanding performance in the VUV-soft x-ray energy range and excellent performance into the hard x-ray region. The facility welcomes researchers from universities, industries, and government laboratories around the world. It is funded by the U.S. Department of Energy, Office of Basic Energy Sciences. Applications to Shape the Future of Synchrotron Radiation Science Synchrotron radiation is now an established tool in many areas of physical and biological science. The ALS Doctoral Fellowships will allow beginning researchers to work at the frontier of synchrotron radiation research and to help advance state-of-the-art applications.

432

AL2007-08.doc  

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

Environmentally Preferable Purchasing Through the Use of the Environmentally Preferable Purchasing Through the Use of the Electronic Product Environmental Assessment Tool (EPEAT) References: Presidential Executive Order 13423 Strengthening Federal Environmental, Energy, and Transportation Management Federal Acquisition Regulations (FAR) Subpart 23.7 Contracting for Environmentally Preferable Products and Services DOE Order 450.1, Chg 2, Environmental Protection Program DOE Acquisition Guide, Chapter 23, Greening the Government - Environmental Considerations in Acquisition Electronic Product Environmental Assessment Tool, IEEE Standard 1680-2006 for Environmental Assessment of Personal Computer Products. When is this Acquisition Letter (AL) Effective? This AL is effective immediately upon issuance.

433

A Review Corrosion of TI Grade 7 and Other TI Alloys in Nuclear Waste Repository Environments  

DOE Green Energy (OSTI)

Titanium alloy degradation modes are reviewed in relation to their performance in repository environments. General corrosion, localized corrosion, stress corrosion cracking, hydrogen induced cracking, microbially influenced corrosion, and radiation-assisted corrosion of Ti alloys are considered. With respect to the Ti Grade 7 drip shields selected for emplacement in the repository at Yucca Mountain, general corrosion, hydrogen induced cracking, and radiation-assisted corrosion will not lead to failure within the 10,000 year regulatory period; stress corrosion cracking (in the absence of disruptive events) is of no consequence to barrier performance; and localized corrosion and microbially influenced corrosion are not expected to occur. To facilitate the discussion, Ti Grades 2, 5, 7, 9, 11, 12, 16, 17, 18, and 24 are included in this review.

F. Hua; K. Mon; P. Pasupathi; G. Gordon

2004-05-11T23:59:59.000Z

434

Mesoscale assembly of NiO nanosheets into spheres  

SciTech Connect

NiO solid/hollow spheres with diameters about 100 nm have been successfully synthesized through thermal decomposition of nickel acetate in ethylene glycol at 200 deg. C. These spheres are composed of nanosheets about 3-5 nm thick. Introducing poly(vinyl pyrrolidone) (PVP) surfactant to reaction system can effectively control the products' morphology. By adjusting the quantity of PVP, we accomplish surface areas-tunable NiO assembled spheres from {approx}70 to {approx}200 m{sup 2} g{sup -1}. Electrochemical tests show that NiO hollow spheres deliver a large discharge capacity of 823 mA h g{sup -1}. Furthermore, these hollow spheres also display a slow capacity-fading rate. A series of contrastive experiments demonstrate that the surface area of NiO assembled spheres has a noticeable influence on their discharge capacity. - Graphical abstract: The mesoscale assembly of NiO nanosheets into spheres have been achieved by a solvothermal method. N{sub 2} adsorption/desorption isotherms show the S{sub BET} of NiO is tunable. NiO spheres show large discharge capacity and slow capacity-fading rate.

Zhang Meng, E-mail: meng_zhang@haut.edu.c [School of Materials Science and Engineering, Henan University of Technology, Zhengzhou, Henan 450007 (China); Yan Guojin; Hou Yonggai; Wang Chunhua [School of Materials Science and Engineering, Henan University of Technology, Zhengzhou, Henan 450007 (China)

2009-05-15T23:59:59.000Z

435

Category:Montgomery, AL | Open Energy Information  

Open Energy Info (EERE)

Montgomery, AL Montgomery, AL Jump to: navigation, search Go Back to PV Economics By Location Media in category "Montgomery, AL" The following 16 files are in this category, out of 16 total. SVFullServiceRestaurant Montgomery AL Alabama Power Co.png SVFullServiceRestauran... 88 KB SVHospital Montgomery AL Alabama Power Co.png SVHospital Montgomery ... 90 KB SVLargeHotel Montgomery AL Alabama Power Co.png SVLargeHotel Montgomer... 86 KB SVLargeOffice Montgomery AL Alabama Power Co.png SVLargeOffice Montgome... 87 KB SVMediumOffice Montgomery AL Alabama Power Co.png SVMediumOffice Montgom... 89 KB SVMidriseApartment Montgomery AL Alabama Power Co.png SVMidriseApartment Mon... 91 KB SVOutPatient Montgomery AL Alabama Power Co.png SVOutPatient Montgomer... 87 KB SVPrimarySchool Montgomery AL Alabama Power Co.png

436

Geometric and Electronic Structures of the Ni(I) and Methyl-Ni(III)  

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

9 9 Geometric and Electronic Structures of the Ni(I) and Methyl-Ni(III) Intermediates of Methyl-Coenzyme M Reductase Methyl-coenzyme M reductase (MCR) from methanogenic archaea catalyzes the terminal step in biological methane synthesis. Using coenzyme B (CoBSH) as the two-electron donor, MCR reduces methyl-coenzyme M (methyl-SCoM) to form methane and the heterodisulfide product, CoBS-SCoM. MCR contains an essential redox active nickel tetrapyrrolic cofactor called coenzyme F430 at its active site, which is active in the reduced Ni(I) state (MCRred1). All of the biologically generated methane, amounting to 1 billion tons per annum globally, is formed by MCR. Furthermore, recent evidence indicates that anaerobic methane oxidation is also catalyzed by MCR and occurs by a reversal of the methane synthesis reaction. Methane is a potent greenhouse gas, trapping 20 times more heat than CO2. In addition, methane is also an important and clean fuel as it produced the least amount of CO2 per unit of heat released. Thus, it is critically important to understand the mechanism of formation of the smallest hydrocarbon in nature.

437

Structural Competition and Phase Transformations in Binary Ti-Nb ...  

Science Conference Proceedings (OSTI)

Structural Competition and Phase Transformations in Binary Ti-Nb Alloys for Biomedical Applications · Structure and Fracture Resistance of Armored Fish Scales.

438

Processing and Mechanical Properties of Ti foams - Programmaster ...  

Science Conference Proceedings (OSTI)

Presentation Title, Processing and Mechanical Properties of Ti foams. Author(s), Faming Zhang, Eileen Otterstein, Eberhard Burkel. On-Site Speaker (Planned) ...

439

Electrical Conductance of Single TiO2 Nanotube Devices  

Science Conference Proceedings (OSTI)

As fabricated TiO2 nanotubes with different wall thicknesses were annealed either in ... carbon foam saturated with SiO2 aerogel for heat insulation purposes.

440

Atomic Layer Deposition of TiO2  

Science Conference Proceedings (OSTI)

Scanning electron microscopy (SEM) was performed on TiO2-coated nanoporous alumina membranes using an S4700 microscope (Hitachi, Tokyo, Japan) with ...

Note: This page contains sample records for the topic "ni ti al" 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

Low Cost TiO2 Nanoparticles - Energy Innovation Portal  

Solar Photovoltaic Advanced Materials Low Cost TiO2 Nanoparticles Sandia National Laboratories. Contact SNL About This Technology Publications: Market ...

442

Graphene Monolayer Rotation on Ni(111) Facilities Bilayer Graphene Growth  

Science Conference Proceedings (OSTI)

Synthesis of bilayer graphene by chemical vapor deposition is of importance for graphene-based field effect devices. Here, we demonstrate that bilayer graphene preferentially grows by carbon-segregation under graphene sheets that are rotated relative to a Ni(111) substrate. Rotated graphene monolayer films can be synthesized at growth temperatures above 650 C on a Ni(111) thin-film. The segregated second graphene layer is in registry with the Ni(111) substrate and this suppresses further C-segregation, effectively self-limiting graphene formation to two layers.

Batzill M.; Sutter P.; Dahal, A.; Addou, R.

2012-06-11T23:59:59.000Z

443

Transformation of Sulfur Species during Steam/Air Regeneration on a Ni Biomass Conditioning Catalyst  

DOE Green Energy (OSTI)

Sulfur K-edge XANES identified transformation of sulfides to sulfates during combined steam and air regeneration on a Ni/Mg/K/Al2O3 catalyst used to condition biomass-derived syngas. This catalyst was tested over multiple reaction/regeneration/reduction cycles. Postreaction catalysts showed the presence of sulfides on H2S-poisoned sites. Although H2S was observed to leave the catalyst bed during regeneration, sulfur remained on the catalyst, and a transformation from sulfides to sulfates was observed. Following the oxidative regeneration, the subsequent H2 reduction led to a partial reduction of sulfates back to sulfides, indicating the difficulty and sensitivity in achieving complete sulfur removal during regeneration for biomass-conditioning catalysts.

Yung, M. M.; Cheah, S.; Magrini-Bair, K.; Kuhn, J. N.

2012-07-06T23:59:59.000Z

444

Synthesis of CdSe -- TiO2 Nanocomposites and Their Applications to TiO2 Sensitized Solar Cells  

Science Conference Proceedings (OSTI)

CdSe-TiO{sub 2} nanocomposites were synthesized via aminolysis of Ti-oleate complexes in the presence of CdSe nanocrystals, and their application as sensitizers for TiO{sub 2} solar cells was investigated. The formation of CdSe-TiO{sub 2} nanocomposites was confirmed using transmission electron microscopy and Raman spectroscopy. The emission spectrum of CdSe-TiO{sub 2} nanocomposites revealed photoinduced charge separation at the CdSe-TiO{sub 2} interface of the composite. The photocurrent-voltage properties of CdSe-TiO{sub 2}-sensitized TiO{sub 2} particle films compared favorably with those of CdSe-sensitized TiO{sub 2} films. Evidence was also found indicating that the TiO{sub 2} component of the composite protects CdSe against degradation during film annealing.

Kim, J. Y.; Choi, S. B.; Noh, J. H.; HunYoon, S.; Lee, S.; Noh, T. H.; Frank, A. J.; Hong, K. S.

2009-01-01T23:59:59.000Z

445

Anderson Todd ALS Annis Edna EETD  

E-Print Network (OSTI)

EH&S Anderson Todd ALS Annis Edna EETD OCFO EETD EETD Beavers Christine ALS Bennett Stacy HR Borden Chakraborty Romy ESD Condon Martha AFRD Crippen Katie Non LBNL Crofoot Derrick ALS Donovan Thomas EH&S Flynn Michelle Facilities Fox Brian OCFO Geller Jil ESD George Anthe PBD Gerasimova Anna PBD Giangrasso Gary ALS

446

Al Magnifico Rettore Prof Luigi Frati  

E-Print Network (OSTI)

Al Magnifico Rettore Prof Luigi Frati Al Direttore Generale Dott. Montaguti Ubaldo OGGETTO: Accordo che nell'Assemblea RS.U. del 23 novembre 2009 è stato richiesto all'unanimità di dare mandato al persona del Dott. Ubaldo Montaguti e le OO.SS. ed RS.U in merito al salario accessorio del personale

Di Pillo, Gianni

447

Microsoft Word - AL2007-01.doc  

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

AL-2007-01 (12/15/06) AL-2007-01 (12/15/06) 1 Department of Energy No. AL-2007-01 Acquisition Regulation Date 12/15/06 ACQUISITION LETTER This Acquisition Letter is issued by the Procurement Executive of DOE. Subject: Implementation of Functional Accountability Requirements References: Secretary of Energy Memorandum dated May 23, 2006, Functional Accountability When is this Acquisition Letter (AL) Effective? This AL, which includes the attached OPAM Implementation Plan and DOE Corporate Implementation Plan, are effective immediately. When does this AL Expire? This AL remains in effect until superseded or canceled and is subject to change as needed. Who is the Point of Contact?

448

$^{64}$Ni+$^{64}$Ni fusion reaction calculated with the density-constrained time-dependent Hartree-Fock formalism  

E-Print Network (OSTI)

We study fusion reactions of the $^{64}$Ni+$^{64}$Ni system using the density-constrained time-dependent Hartree-Fock (TDHF) formalism. In this formalism the fusion barriers are directly obtained from TDHF dynamics. In addition, we incorporate the entrance channel alignments of the slightly deformed (oblate) $^{64}$Ni nuclei due to dynamical Coulomb excitation. We show that alignment leads to a fusion barrier distribution and alters the naive picture for defining which energies are actually sub-barrier. We also show that core polarization effects could play a significant role in fusion cross section calculations.

A. S. Umar; V. E. Oberacker

2007-09-25T23:59:59.000Z

449

Surface characteristics and electrochemical corrosion behavior of NiTi alloy coated , Y.B. Wang a  

E-Print Network (OSTI)

of the problem, namely, W and Bi. The results of simulations are presented in Figs. 7 and 8­9. Figures 7 and 8, Thermochim. Acta 377, 105 2001 . 8 D. Dadarlat, J. Gibkes, D. Bicanic, and A. Pasca, J. Food. Eng. 30, 155

Zheng, Yufeng

450

A8: Effect of Doping in Ti4Ni4Si7 Matrix Confining Nano-Si for ...  

Science Conference Proceedings (OSTI)

... to meet the demands of industries that is likely apply LIB to electric vehicles ( EV), hybrid electric vehicles (HEV) and plug-in hybrid electric vehicles (PHEV).

451

The Application of CALPHAD Calculations to Ni-Based Superalloys  

Science Conference Proceedings (OSTI)

The Cr content was raised from 20 to 24wt% to increase coal ash corrosion resistance. 2. ..... Ni-based Alloys”, Univ.Cambridge report to Rolls-Royce plc.,. Derby ...

452

Electrochemically Preparing of Ni-Fe Alloys in Molten Sodium ...  

Science Conference Proceedings (OSTI)

A Pilot-plant Scale Test of Coal-based Rotary Kiln Direct Reduction of Laterite Ore for Fe-Ni Production · A Pilot-plant Scale Test on DRI Preparation from ...

453

ST/EL and ST/CV services for TI2 & TI8 LHC injection tunnels  

E-Print Network (OSTI)

This paper describes the ST/EL and ST/CV services for TI2 & TI8 LHC injection tunnels. The cooling and ventilation part describes the requirements for design and installation of more than 10 km of pipeline that is going to be laid down in the tunnels. Main operating parameters as well as manufacture procedures are explained. Preliminary work schedule with the cost estimate is also presented. Electrical power will be distributed from the LHC side and the SPS side for the machine and the general services. All power converters will be installed on surface buildings. The link between the main bend converters and the main bend magnets will be realised with water-cooled cables. Rest of the magnets will be cabled by using conventional copper and aluminium cables. Due to long lengths of the injection tunnels a dry 18kV transformer will be installed in TJ8 to serve the general services for TI8. The same will apply to TI2 by installing a transformer at the bottom of the PMI2 shaft.

Akhtar, S; CERN. Geneva. ST Division

2002-01-01T23:59:59.000Z

454

AL2007-05.doc  

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

7-05 7-05 Acquisition Regulation Date 03/29/2007 ACQUISITION LETTER This Acquisition Letter is issued under the authority of the DOE and NNSA Procurement Executives. Acquisition Letters (AL) that remain in effect are identified below. All other previously issued ALs have been superseded by a formal rule-making, incorporated into other guidance, and/or canceled. * * * * * * * * * * * * * * * * ACQUISITION LETTERS REMAINING IN EFFECT NUMBER DATE SUBJECT 93-4 04/07/93 Displaced Workers Benefits Program 94-19 12/09/94 Basic Labor Policies Fringe Benefits 95-06 06/28/95 Personal Property Letter System 95-14 11/17/95 Subcontracts under the New Independent States - Industrial Partnering Program

455

AL2007-03.doc  

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

AL 2007-03 AL 2007-03 Acquisition Regulation Date 03/30/07 ACQUISITION LETTER This Acquisition Letter is issued under the authority of the DOE and NNSA Procurement Executives. Subject: Interagency Acquisition References: FAR Part 7 Acquisition Planning FAR Part 8 Required Sources of Supplies and Services FAR Part 10 Market Research FAR Subpart 17.2 Options FAR Subpart 17.5 Interagency Acquisitions under the Economy Act FAR Part 37 Service Contracting FAR Part 38 Federal Supply Schedule Contracting FAR Part 42 Contract Management DEAR 970.1707 Work For Others Guide Chapter 7.1 Acquisition Planning Guide Chapter 17.1 Interagency Agreements Guide Chapter 38.1 Task Order Contracting Strategic Acquisition Transaction Guide

456

XPS study of Ni-Fe manganite thermistor material  

SciTech Connect

The resistivity of the as-fabricated thermistor material, nickel-iron-manganite, changes during initial aging in the temperature range of 150-300{degrees}C before becoming stable. X-ray photoelectron spectroscopy (XPS) was used to determine if any valency change or chemical shift of the cations or oxygen occurred after aging. The goal of the study was to identify any ionic changes that might affect thermistor stability. The only observed changes in 2p{sub 3/2} peaks due to aging were those related to Ni ions; the same peaks for Mn, Fe, and O remained unchanged. The changes in the Ni 2p{sub 3/2} peak may be related to: (a) the migration of Ni{sup 2+} ions from octahedral to tetrahedral sites, (b) subtle changes in the energy states of Ni{sup 2+} which promoted a more stable ionic structure, and/or (c) the presence of Ni{sup 3+} ions, some of which revert back to Ni{sup 2+}.

Braski, D.N. [Oak Ridge National Lab., TN (United States); Osborne, N.R. [Univ. of Dayton Research Institute, OH (United States); Zurbuchen, J.M. [Yellow Springs Instruments, Inc., OH (United States)

1995-03-01T23:59:59.000Z

457

Structural Origin of Overcharge-Induced Thermal Instability of Ni-Containing Layered-Cathodes for High-Energy-Density Lithium Batteries  

DOE Green Energy (OSTI)

Using a combination of time-resolved X-ray diffraction (XRD), in situ transmission electron microscopy (TEM), and first principles calculations, we explore the structural origin of the overcharge induced thermal instability of two cathode materials, LiNi{sub 0.8}Co{sub 0.15}Al{sub 0.05}O{sub 2} and LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2}, which exhibit significant difference in thermal stabilities. Detailed TEM analysis reveals, for the first time, a complex core-shell-surface structure of the particles in both materials that was not previously detected by XRD. Structural comparison indicates that the overcharged Li{sub x}Ni{sub 0.8}Co{sub 0.15}Al{sub 0.05}O{sub 2} (x < 0.15) particles consist of a rhombohedral core, a spinel shell, and a rock-salt structure at the surface, while the overcharged Li{sub x}Ni{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2} consists of a similar core-shell-surface structure but a very different CdI{sub 2}-type surface structure. The thermal instability of Li{sub x}Ni{sub 0.8}Co{sub 0.15}Al{sub 0.05}O{sub 2} can be attributed to the release of oxygen because of the rapid growth of the rock-salt-type structure on the surface during heating. In contrast, the CdI{sub 2}-type surface structure of the overcharged Li{sub x}Ni{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2} particles delays the oxygen-release reaction to a much higher temperature resulting in better stability. These results gave deep insight into the relationship between the local structural changes and the thermal stability of cathode materials, which is vital to the development of new cathode materials for the next generation of lithium-ion batteries.

Wu, L.; Nam, K.-W.; Wang, X.; Zhou, Y.; Zheng, J.-C.; Yang, X.-Q.; Zhu, Y.

2011-08-04T23:59:59.000Z

458

Structural Origin of Overcharge-induced Thermal Instability of Ni-containing Layered-cathodes for High-energy-density Lithium Batteries  

DOE Green Energy (OSTI)

Using a combination of time-resolved X-ray diffraction (XRD), in situ transmission electron microscopy (TEM), and first principles calculations, we explore the structural origin of the overcharge induced thermal instability of two cathode materials, LiNi{sub 0.8}Co{sub 0.15}Al{sub 0.05}O{sub 2} and LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2}, which exhibit significant difference in thermal stabilities. Detailed TEM analysis reveals, for the first time, a complex core-shell-surface structure of the particles in both materials that was not previously detected by XRD. Structural comparison indicates that the overcharged Li{sub x}Ni{sub 0.8}Co{sub 0.15}Al{sub 0.05}O{sub 2} (x < 0.15) particles consist of a rhombohedral core, a spinel shell, and a rock-salt structure at the surface, while the overcharged LixNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2} consists of a similar core-shell-surface structure but a very different CdI{sub 2}-type surface structure. The thermal instability of LixNi{sub 0.8}Co{sub 0.15}Al{sub 0.05}O{sub 2} can be attributed to the release of oxygen because of the rapid growth of the rock-salt-type structure on the surface during heating. In contrast, the CdI{sub 2}-type surface structure of the overcharged LixNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2} particles delays the oxygen-release reaction to a much higher temperature resulting in better stability. These results gave deep insight into the relationship between the local structural changes and the thermal stability of cathode materials, which is vital to the development of new cathode materials for the next generation of lithium-ion batteries.

L Wu; K Nam; X Wang; Y Zhou; J Zheng; X Yang; Y Zhu

2011-12-31T23:59:59.000Z

459

Structural Origin of Overcharge-induced Thermal Instability of Ni-containing Layered-cathodes for High-energy-density Lithium Batteries  

Science Conference Proceedings (OSTI)

Using a combination of time-resolved X-ray diffraction (XRD), in situ transmission electron microscopy (TEM), and first principles calculations, we explore the structural origin of the overcharge induced thermal instability of two cathode materials, LiNi{sub 0.8}Co{sub 0.15}Al{sub 0.05}O{sub 2} and LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2}, which exhibit significant difference in thermal stabilities. Detailed TEM analysis reveals, for the first time, a complex core-shell-surface structure of the particles in both materials that was not previously detected by XRD. Structural comparison indicates that the overcharged Li{sub x}Ni{sub 0.8}Co{sub 0.15}Al{sub 0.05}O{sub 2} (x shell, and a rock-salt structure at the surface, while the overcharged LixNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2} consists of a similar core-shell-surface structure but a very different CdI{sub 2}-type surface structure. The thermal instability of LixNi{sub 0.8}Co{sub 0.15}Al{sub 0.05}O{sub 2} can be attributed to the release of oxygen because of the rapid growth of the rock-salt-type structure on the surface during heating. In contrast, the CdI{sub 2}-type surface structure of the overcharged LixNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2} particles delays the oxygen-release reaction to a much higher temperature resulting in better stability. These results gave deep insight into the relationship between the local structural changes and the thermal stability of cathode materials, which is vital to the development of new cathode materials for the next generation of lithium-ion batteries.

L Wu; K Nam; X Wang; Y Zhou; J Zheng; X Yang; Y Zhu

2011-12-31T23:59:59.000Z

460

Synthesis of Zr Doped NiO Layers on NiSi2 Linling Gu/Si-MCP Structures for Supercapacitors  

Science Conference Proceedings (OSTI)

Three-dimensional super capacitors consisting of NiSi2/silicon micro channel plates (MCPs) with Zr doped NiO layers have been fabricated. The silicon MCPs produced by electrochemical etching is utilized as a backbone of the 3D structure. Nickle layer ... Keywords: Zr doped NiO, Electrochemical properties, Silicon microchannel plate

Linling Gu; Tao Liu; Fei Wang; Shaohui Xu; Lianwei Wang; Paul K. Chu

2012-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "ni ti al" 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

Middle distillate hydrotreatment zeolite catalysts containing Pt/Pd or Ni  

E-Print Network (OSTI)

A study on middle distillate hydrotreatment zeolite catalysts containing Pt/Pd and/or Ni was performed. The effect of the addition of the corresponding CoMo, CoMoPd, CoMoPtPd and CoMoNi in PdNiPt-zeolite, Pt-zeolite, Ni-zeolite, and PdPt-zeolite was studied. The catalysts were characterized physically and chemically by methods and techniques such as Brunauer-Emmett-Teller (BET), Barret-Joyner-Hallenda (BJH), and neutron activation analysis. The structures of the Ni and Pt containing zeolite were studied by X-ray Photoelectron Spectroscopy (XPS). An experimental apparatus was constructed to investigate the activity of the experimental catalysts. The catalysts activity measured in terms of conversion of dibenzothiophene (DBT), substituted dibenzothiophenes (sDBT) and phenanthrene as well as molar-averaged conversion was evaluated in a continuous flow Robinson Mahoney reactor with stationary basket in the hydrodesulfurization and hydrogenation of heavy gas oil which contains sulphur refractory compounds such as 4- methyldibenzotiophene (4-MDBT) and 4,6- dimethyldibenzothiophene (4,6-DMDBT). DBT, 4-MDBT, 3-MDBT, 1-EDBT, 3-EDBT, 4,6-DMDBT, 3,6-DMDBT, 2,8- DMDBT and 4-methylnaphtho[2,1-b]thiophene were selected to calculate the molaraveraged conversion. The conversions of the sulfur containing compounds and phenanthrene were determined as a function of the operating variables: space time (W/Fo DBT), temperature, H2/HC mol ratio and pressure. The Conversions of DBT and 4,6-DMDBT into their reaction products such as Biphenyl (BPH), Cyclohexylbenzene (CHB), Bicyclohexyl (BCH) and 3,4-Dimethylbiyphenyl (3,4-DMBPH) were determined only as a function of space time in the interval of 4000-6000 kgcath/kmol. The results of this work showed that Pt-HY and PdPt-HY are good noble metals catalysts for the hydrodesulfurization of heavy gas oil. Moreover, this study showed that CoMoPd/Pt-HY and CoMoNi/PdPt-HY catalysts are good candidates for deep HDS and hydrogenation of heavy gas oil. It was found that the conversions of sulfur compounds were higher than the conversions provided by the conventional CoMo/Al2O3 catalyst. Also higher hydrogenation of phenanthrene was observed. Deactivation of the catalysts was not observed during the operation. Finally, the study not only contributed to define the technical bases for the preparation of the noble metal catalysts for hydrodesulfurization of heavy gas oil at pilot scale, but also provided technical information for developing the kinetic modeling of the hydrodesulfurization of heavy gas oil with the noble metal catalysts.

Marin-Rosas, Celia

2006-12-01T23:59:59.000Z

462

Passivation of In{sub 0.53}Ga{sub 0.47}As/ZrO{sub 2} interfaces by AlN atomic layer deposition process  

SciTech Connect

Reducing defects at III-V/high-k interfaces is essential for optimizing devices built on these materials. Here, the role of an interfacial AlN process at In{sub 0.53}Ga{sub 0.47}As/ZrO{sub 2} interfaces is investigated by hard x-ray photoelectron spectroscopy (HAXPES) and capacitance/voltage (C-V) measurements. C-V measurements show a significant reduction in the density of interface traps with the interfacial AlN process and a capping TiN layer. To elucidate the specific role of the AlN process, blanket films with various deposition processes are compared. The AlN process alone (without subsequent dielectric deposition) reduces InGaAs oxide levels below the HAXPES detection limit, even though the AlN is ultimately found to be oxidized into AlO{sub x} with only trace N incorporation, yet AlN passivation provides a lower D{sub it} (density of interface traps) when compared with an H{sub 2}O-based Al{sub 2}O{sub 3} deposition. The AlN process does not passivate against re-oxidation of the InGaAs during an O{sub 3} based ZrO{sub 2} deposition process, but it does provide passivation against As-As development during subsequent TiN deposition. The role of chemical defects in the C-V characteristics is also discussed.

Weiland, C.; Woick, J. C. [National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States); Rumaiz, A. K. [National Synchrotron Light Source, Brookhaven National Laboratory, Upton, New York 11973 (United States); Price, J.; Lysaght, P. [SEMATECH, 257 Fuller Road, Albany, New York 12203 (United States)

2013-07-21T23:59:59.000Z

463

The ALS Gun Electronics system  

SciTech Connect

The ALS Gun Electronics system has been designed to accommodate gun with a custom made socket and high speed electronics circuit which is capable of producing single and multiple electron bunches with time jitters measured at better than 50 PS. The system generates the gated RF signal at ground level before sending it up to the 120 KV-biased gun deck via a fiber optic cable. The current pulse width as a function of grid bias, using an Eimac 8847A planar triode simulating an electron gun, was measured to show the relationship between the two parameters.

Lo, C.C.

1993-05-01T23:59:59.000Z

464

Microsoft Word - AL2002-03.doc  

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

AL 2002-03 (3/13/2002) AL 2002-03 (3/13/2002) Subject: Public Relations Requirements References: Deputy Secretary Letter dated February 25, 2002 When is this Acquisition Letter (AL) Effective? This AL is effective 10 business days from the date of issuance. When does this AL Expire? This AL remains in effect until superseded or canceled. Who is the Point of Contact? Contact Bob Webb of the Office of Procurement and Assistance Policy at (202) 586-8264, or via e-mail at robert.webb@hq.doe.gov Visit our website at www.pr.doe.gov for information on Acquisition Letters and other policy issues. What is the Purpose of this AL? The purpose of this AL is to provide guidance regarding the processing of procurement requests for obtaining contractual services from public relations

465

Al Husseini Amelio JV | Open Energy Information  

Open Energy Info (EERE)

Al Husseini Amelio JV Jump to: navigation, search Name Al-Husseini & Amelio JV Place Jordan Sector Solar Product JV company to develop a 1GW solar plant in Jordan and an integrated...

466

Al Corn Clean Fuel | Open Energy Information  

Open Energy Info (EERE)

to: navigation, search Name Al-Corn Clean Fuel Place Claremont, North Dakota Product Al-Corn is an ethanol plant located in Claremont, North Dakota, which is owned by local...

467

ALS Operating Schedule on Google Calendar  

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

ALS Operating Schedule on Google Calendar Print ALS Operating Schedule Your browser does not appear to support JavaScript, but this page needs to use JavaScript to display...

468

ELE TRO HEMI AL SOLUTION GROWTH  

market Utility grid modernization (incorporation of renewable energy using energy storage) TE HNOLOGI AL High potential for producing

469

FLUORES ENT OPTI AL POSITION SENSOR  

POTENTIAL APPLI ATIONS TE HNOLOGI AL Hazardous environments Oil & gas drilling Mineral drilling Water well drilling ENEFITS Measures fluorescent light ...

470

Effect of Al-Si-Al and Al-Si-Si-Al Pairs in the ZSM-5 Zeolite Framework on the 27 NMR Spectra. A Combined High-Resolution 27  

E-Print Network (OSTI)

Effect of Al-Si-Al and Al-Si-Si-Al Pairs in the ZSM-5 Zeolite Framework on the 27 Al NMR Spectra. A Combined High-Resolution 27 Al NMR and DFT/MM Study Jiri´ Dedecek, Stepan Sklenak,*, Chengbin Li, Blanka of the presence of Al-O-Si-O-Al and Al-O-Si-O-Si-O-Al sequences in the ZSM-5 zeolite framework on the local

Sklenak, Stepan

471

4 November 2003 Kaufmann et al. 2005  

E-Print Network (OSTI)

4 November 2003 Kaufmann et al. 2005 #12;Two questions raised by submm- observations presented by Kaufmann et al. 2004: By what mechanism(s) is the emission produced? · Thermal free-free radiation? · Anomalous widths of the 511 keV emission? · High energy electrons? #12;Kaufmann et al. 2004 4 November 2003

White, Stephen

472

Diffusion bonding of commercially pure Ni using Cu interlayer  

Science Conference Proceedings (OSTI)

The concentration dependence of diffusivity in a multi-component diffusion system makes it complicated to predict the concentration profiles of diffusing species. This so called chemical diffusivity can be expressed as a function of thermodynamic and kinetic data. DICTRA software can calculate the concentration profiles using appropriate mobility and thermodynamic data. It can also optimize the diffusivity data using experimental diffusivity data. Then the optimized diffusivity data is stored as mobility data which is a linear function of temperature. In this work, diffusion bonding of commercially pure Ni using Cu interlayers is reported. The mobility parameters of Ni-Cu alloy binary systems were optimized using DICTRA/Thermocalc software from the available self-, tracer and chemical diffusion coefficients. The optimized mobility parameters were used to simulate concentration profiles of Ni-Cu diffusion joints using DICTRA/Thermocalc software. The calculated and experimental concentration profiles agreed well at 1100 Degree-Sign C. Agreement between the simulated and experimental profiles was less good at 1050 Degree-Sign C due to the grain boundary contribution to the overall diffusion. - Highlights: Black-Right-Pointing-Pointer The concentration profiles of Cu in Ni-Cu diffusion joints are modeled. Black-Right-Pointing-Pointer Interdiffusion coefficients in Ni-Cu system are optimized. Black-Right-Pointing-Pointer Optimized interdiffusion coefficients are expressed as mobility parameters. Black-Right-Pointing-Pointer Simulated profiles are comparable with experimental profiles.

Rahman, A.H.M.E., E-mail: a.rahman@my.und.edu; Cavalli, M.N.

2012-07-15T23:59:59.000Z

473

Mitigation of Sulfur Poisoning of Ni/Zirconia SOFC Anodes by Antimony and Tin  

Science Conference Proceedings (OSTI)

Surface Ni/Sb and Ni/Sb alloys were found to efficiently minimize the negative effects of sulfur on the performance of Ni/zirconia anode-supported solid oxide fuel cells (SOFC). Prior to operating on fuel gas containing low concentrations of H2S, the nickel/zirconia anodes were briefly exposed to antimony or tin vapor, which only slightly affected the SOFC performance. During the subsequent exposures to 1 and 5 ppm H2S, increases in anodic polarization losses were minimal compared to those observed for the standard nickel/zirconia anodes. Post-test XPS analyses showed that Sb and Sn tended to segregate to the surface of Ni particles, and further confirmed a significant reduction of adsorbed sulfur on the Ni surface in Ni/Sn and Ni/Sb samples compared to the Ni. The effect may be the result of weaker sulfur adsorption on bimetallic surfaces, adsorption site competition between sulfur and Sb or Sn on Ni, or other factors. The use of dilute binary alloys of Ni-Sb or Ni-Sn in the place of Ni, or brief exposure to Sb or Sn vapor, may be effective means to counteract the effects of sulfur poisoning in SOFC anodes and Ni catalysts. Other advantages, including suppression of coking or tailoring the anode composition for the internal reforming, are also expected.

Marina, Olga A.; Coyle, Christopher A.; Engelhard, Mark H.; Pederson, Larry R.

2011-02-28T23:59:59.000Z

474

Microsoft Word - AL2006-01.doc  

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

6-01 6-01 Acquisition Regulation Date 10/27/05 ACQUISITION LETTER This Acquisition Letter is issued under the authority of the DOE and NNSA Procurement Executives. Subject: Electronic Subcontracting Reporting System (eSRS) References: FAR Subpart 19.7 The Small Business Subcontracting Program DEAR 919.705-6 Postaward responsibilities of the contracting officer AL 2005-07 Small Business Procurement Goals What is the Effective date of this Acquisition Letter (AL)? This AL is effective immediately after the eSRS goes online. When does this AL Expire? This AL remains in effect until superseded or canceled. What are the Points of Contact?

475

Controlling Atomic Layer Deposition of TiO2 in Aerogels through Surface Functionalization  

DOE Green Energy (OSTI)

This report demonstrates a chemical functionalization method for controlling atomic layer deposition (ALD) of TiO{sub 2} in low-density nanoporous materials. Functionalization of silica aerogel with trimethylsilane is shown to strongly suppress TiO{sub 2} growth via ALD. Subsequent modification of the functionalization through selective removal of the hydrocarbon groups reactivates the aerogel towards TiO{sub 2} deposition. These results demonstrate the potential use of ALD as a selective tool for creating novel nanoporous materials. Nanoporous materials present significant technological advantage for a wide range of applications, including catalysis, energy storage and conversion, nanoelectronics to name just a few (1-4). Hence, there is considerable interest in developing synthetic pathways for the fabrication of nanoporous materials with tailored properties. Aerogels (AGs) are unique low-density, open-cell porous materials consisting of submicrometer pores and ligaments that can be used as a robust material platform for designing novel nanoporous materials. In recent years, a synthetic approach based on ALD on AG templates has emerged as a promising method for the directed growth of nanoporous materials (5-11, 18). This approach has been used successfully to prepare millimeter-sized high aspect ratio aerogels coated uniformly with zinc oxide (ZnO), tungsten (W) and alumina (Al{sub 2}O{sub 3}) (10, 11). The ALD process utilizes two sequential, self-limiting surface reactions resulting in a layer-by-layer growth mode. The self limiting nature of the surface reactions makes ALD a particularly suitable technique for uniform deposition onto high aspect ratio porous substrates. Additionally, chemical specificity of the surface reactions in ALD enables one to control the deposition process through selective functionalization of the substrate surface. In fact the functionalization of planar substrates such as silicon wafers with organosilane groups (R{sub n}SiX{sub 4-n} (n = 1-3)) has been shown to deactivate the substrate towards ZrO{sub 2}, HfO{sub 2}, ZnO, and TiO{sub 2} ALD processes (12-16). A possible mechanism for the deactivation effect is the blocking of surface functional groups, such as hydroxyl (OH) moieties, which serve as chemisorption sites for the ALD precursors and hence are essential for nucleating the deposition process. Henceforth, we shall refer to these surface functional groups as nucleation sites for the ALD process.

Ghosal, S; Baumann, T F; King, J S; Kucheyev, S; Wang, Y; Worsley, M A; Biener, J; Bent, S F; Hamza, A V

2009-03-09T23:59:59.000Z

476

Superlubricity through graphene multilayers between Ni(111) surfaces  

E-Print Network (OSTI)

A single graphene layer placed between two parallel Ni(111) surfaces screens the strong attractive force and results in a significant reduction of adhesion and sliding friction. When two graphene layers are inserted, each graphene is attached to one of the metal surfaces with a significant binding and reduces the adhesion further. In the sliding motion of these surfaces the transition from stick-slip to continuous sliding is attained, whereby non-equilibrium phonon generation through sudden processes is suppressed. The adhesion and corrugation strength continues to decrease upon insertion of the third graphene layer and eventually saturates at a constant value with increasing number of graphene layers. In the absence of Ni surfaces, the corrugation strength of multilayered graphene is relatively higher and practically independent of the number of layers. Present first-principles calculations reveal the superlubricant feature of graphene layers placed between pseudomorphic Ni(111) surfaces, which is achieved t...

Cahangirov, S; Özçelik, V Ongun

2013-01-01T23:59:59.000Z

477

Monte Carlo Simulations of Segregation in Pt-Ni Catalyst Nanoparticles  

E-Print Network (OSTI)

of Segregation in Pt-Ni Catalyst Nanoparticles Guofengsurface chemistry of catalyst nanoparticles (also called "Pt-Ni alloy is an electro-catalyst of interest in the air

Wang, Guofeng; Van Hove, Michel A.; Ross, Philip N.; Baskes, M.I.

2004-01-01T23:59:59.000Z

478

CoNiFe Alloy Powder Synthesis by High Energy Milling  

Science Conference Proceedings (OSTI)

CoNiFe alloy powder was synthesized by high energy milling of mixtures of Co, Ni and Fe powder as a bulk processing method for producing powder. A milling ...

479

The Effect of Pellet Geometry on The Specific Activity of Ni-63.  

E-Print Network (OSTI)

?? 63Ni [Nickel-63] is routinely produced at HFIR with a specific activity of ~15 Ci/g [Curies/gram] by irradiating highly enriched stable 62Ni [Nickel-62] (86.31 %)… (more)

Walsh, Spenser Riley

2013-01-01T23:59:59.000Z

480

Das Standard Modell als Theorie  

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

as a Theory as a Theory Ungelöste Rätsel Das Standard Modell als Theorie Auch wenn das Standard Modell die im Experiment beobachteten Phänomene sehr gut beschreibt, so ist es dennoch eine unvollständige Theorie. Das Problem liegt darin, dass das Standard Modell nicht erklären kann, warum einige Teilchen gerade diejenigen Eigenschaften haben, die wir beobachten. Zum Beispiel, auch wenn den Physikern die Massen aller Quarks - mit Ausnahme derjenigen des top Quarks - seit Jahren bekannt waren, so war es dennoch nicht möglich die Masse des top Quarks ohne die Hilfe experimenteller Daten genau vorherzusagen. Das ist deshalb so, weil das Standard Modell keine Erklärung dafür geben kann, warum die Liste der Teilchenmassen gerade diese Zahlenwerte aufweist.

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481

Single-step Precipitation of Ni Nanoparticle Catalyst on Zeolite and ...  

Science Conference Proceedings (OSTI)

Abstract Scope, Ni nanoparticle catalyst was prepared on zeolite (pores size: 2 production rate from the methanol stream reforming reaction ...

482

Effect of amorphous Mg{sub 50}Ni{sub 50} on hydriding and dehydriding behavior of Mg{sub 2}Ni alloy  

SciTech Connect

Composite Mg{sub 2}Ni (25 wt.%) amorphous Mg{sub 50}Ni{sub 50} was prepared by mechanical milling starting with nanocrystalline Mg{sub 2}Ni and amorphous Mg{sub 50}Ni{sub 50} powders, by using a SPEX 8000 D mill. The morphological and microstructural characterization of the powders was performed via scanning electron microscopy and X-ray diffraction. The hydriding characterization of the composite was performed via a solid gas reaction method in a Sievert's-type apparatus at 363 K under an initial hydrogen pressure of 2 MPa. The dehydriding behavior was studied by differential thermogravimetry. On the basis of the results, it is possible to conclude that amorphous Mg{sub 50}Ni{sub 50} improved the hydriding and dehydriding kinetics of Mg{sub 2}Ni alloy upon cycling. A tentative rationalization of experimental observations is proposed. - Research Highlights: {yields} First study of the hydriding behavior of composite Mg{sub 2}Ni (25 wt.%) amorphous Mg{sub 50}Ni{sub 50}. {yields} Microstructural characterization of composite material using XRD and SEM was obtained. {yields} An improved effect of Mg{sub 50}Ni{sub 50} on the Mg{sub 2}Ni hydriding behavior was verified. {yields} The apparent activation energy for the hydrogen desorption of composite was obtained.

Guzman, D., E-mail: danny.guzman@uda.cl [Departamento de Ingenieria en Metalurgia, Facultad de Ingenieria, Universidad de Atacama y Centro Regional de Investigacion y Desarrollo Sustentable de Atacama (CRIDESAT), Av. Copayapu 485, Copiapo (Chile); Ordonez, S. [Departamento de Ingenieria Metalurgica, Facultad de Ingenieria, Universidad de Santiago de Chile, Av. Lib. Bernardo O'Higgins 3363, Santiago (Chile); Fernandez, J.F.; Sanchez, C. [Departamento de Fisica de Materiales, Facultad de Ciencias, Universidad Autonoma de Madrid, Cantoblanco 28049, Madrid (Spain); Serafini, D. [Departamento de Fisica, Facultad de Ciencias, Universidad de Santiago de Chile and Center for Interdisciplinary Research in Materials, CIMAT, Av. Lib. Bernardo O'Higgins 3363, Santiago (Chile); Rojas, P.A. [Escuela de Ingenieria Mecanica, Facultad de Ingenieria, Av. Los Carrera 01567, Quilpue, Pontificia Universidad Catolica de Valparaiso, PUCV (Chile); Aguilar, C. [Departamento de Ingenieria Metalurgica y Materiales, Universidad Tecnica Federico Santa Maria, Av. Espana 1680, Valparaiso (Chile); Tapia, P. [Departamento de Ingenieria en Metalurgia, Facultad de Ingenieria, Universidad de Atacama, Av. Copayapu 485, Copiapo (Chile)

2011-04-15T23:59:59.000Z

483

Nature of Transactions (TI) Code | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

Nature of Transactions (TI) Code | National Nuclear Security Administration Nature of Transactions (TI) Code | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Nature of Transactions (TI) Code Home > About Us > Our Programs > Nuclear Security > Nuclear Materials Management & Safeguards System > NMMSS Information, Reports & Forms > Code Tables > Nature of Transactions (TI) Code

484

Explosive joints in Nb--Ti/Cu composite superconductors  

SciTech Connect

Explosive welding techniques have been applied to the joining of a Nb-Ti/ Cu composite conductor. Details of the process are given together with mechanical and electrical evaluations of the resulting joints. (auth)

Cornish, D.N.; Zbasnik, J.P.; Pattee, H.E.

1975-11-01T23:59:59.000Z

485

J-26: Nanocomposite Photocatalysts Containing TiO2 for ...  

Science Conference Proceedings (OSTI)

... viruses, fungi and algae. The main drawbacks of the low quantum yields and the lack of visible-light utilization hinder the practical applications of TiO2. Hence  ...

486

TiO2: Fundamentals, Applications, and Perspectives  

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

TiO2: Fundamentals, Applications, and Perspectives Speaker(s): Werner Hofer Date: November 18, 2011 (All day) Location: 90-3122 Seminar HostPoint of Contact: Robert Kostecki I...

487

Effects of Ti Content on Cavitation Resistance of Austenitic Stainless ...  

Science Conference Proceedings (OSTI)

D8: Study of Rack and Chord Assembly Formability for Jack-up Platforms ... Zone of Zr-Ti Microalloyed High-strength High-toughness Offshore Structural Steels.

488

Properties of dc magnetron reactively sputtered TiN  

Science Conference Proceedings (OSTI)

Titanium nitride is of interest for IC fabrication because of its excellent performance as a metallic diffusion barrier. TiN films have been deposited in a batch sputtering system equipped with dc magnetron cathodes

Jim Stimmell

1986-01-01T23:59:59.000Z

489

Synthesis of Nanostructured TiO2 /Carbon Nanotube Heterojunction ...  

Science Conference Proceedings (OSTI)

Microstructural Evolution of SnS Thin Films Grown by Electrodeposition · Morphology Engineering of 1D, 2D and 3D TiO2 Nanostructures and Their Application ...

490

3DXRD Characterization of GNDs and Deformation Twins in ?-Ti  

Science Conference Proceedings (OSTI)

... ?-Ti using the 3DXRD station 34-ID-E at the Advanced Photon Source, Argonne National Laboratory. ... Research at APS 34-ID-E, partly funded by BES/ DOE.

491

Oxygen Reduction Activity of PtxNi1-x Alloy Nanoparticles on Multiwall Carbon Nanotubes  

E-Print Network (OSTI)

PtxNi1 - x nanoparticles (Pt:Ni; 1:0, 4:1, 3:1 and 0.7:1) of ~5 nm, were synthesized on carboxylic acid-functionalized multiwall carbon nanotubes (PtxNi1 - x NPs/MWNT). The oxygen reduction reaction (ORR) activity measurements ...

Kim, Junhyung

492

Improved thermal stability of Ni-silicides on Si: C epitaxial layers  

Science Conference Proceedings (OSTI)

The thermal stability of Ni-silicides on tensily strained in situ P doped Si:C epitaxial layers was evaluated. The baseline Ni silicidation process was shown to be compatible with Si:C Recessed Source-Drain (RSD) stressors for NMOS strain engineering ... Keywords: Epitaxy, Ni, SiC stressors, Silicide, Thermal stability

V. Machkaoutsan; S. Mertens; M. Bauer; A. Lauwers; K. Verheyden; K. Vanormelingen; P. Verheyen; R. Loo; M. Caymax; S. Jakschik; D. Theodore; P. Absil; S. G. Thomas; E. H. A. Granneman

2007-11-01T23:59:59.000Z

493

First principles study of Li diffusion in I-Li_{2}NiO_{2} structure  

E-Print Network (OSTI)

First principles computations have been used to study Li mobility in the orthorhombic Li2NiO2 structure with the Immm space group (I-Li2NiO2). Understanding Li mobility in I-Li2NiO2 structure other than the conventional ...

Ceder, Gerbrand

494

Preparation and Hydrogen storage properties of Mg-rich Mg-Ni ultrafine particles  

Science Conference Proceedings (OSTI)

In the present work, Mg-rich Mg-Ni ultrafine powders were prepared through an arc plasma method. The phase components, microstructure, and hydrogen storage properties of the powders were carefully investigated. It is found that Mg2Ni and MgNi2 ...

Jianxin Zou, Haiquan Sun, Xiaoqin Zeng, Gang Ji, Wenjiang Ding

2012-01-01T23:59:59.000Z

495

Stress evolution during Ni-Si compound formation for fully silicided (FUSI) gates  

Science Conference Proceedings (OSTI)

The stress (force) evolution during the formation of different Ni silicide phases was monitored by in situ curvature measurements, for the reaction of thin Ni films of various thicknesses with 100nm polycrystalline-Si deposited on oxidized (100) Si substrates. ... Keywords: In situ XRD, In situ curvature measurements, Ni-silicides

C. Torregiani; C. Van Bockstael; C. Detavernier; C. Lavoie; A. Lauwers; K. Maex; J. A. Kittl

2007-11-01T23:59:59.000Z

496

Redox Investigation of NiFe2O4 Supported on Al2O3 and Yttria ...  

Science Conference Proceedings (OSTI)

Symposium, J. Materials and Processes for Enhanced Performance ... Separation and Recovery Process of Rare Metals from Oil Desulfurization Spent Catalyst ... Pulsed Laser Evaporation: An Enabling Technology for Organic Thin Films.

497

Layered Li1+x(Ni0.425Mn0.425Co0.15)1xO2 Positive Electrode Materials for Lithium-Ion Batteries  

E-Print Network (OSTI)

Layered Li1+x(Ni0.425Mn0.425Co0.15)1­xO2 Positive Electrode Materials for Lithium-Ion Batteries range decreased with overlithiation Keywords : Although LiCoO2 is suitable for the lithium-ion battery by Ohzuku et al. to deliver a high discharge capacity close to 200 mAh/g,21 a lot of research in the lithium-ion

Paris-Sud XI, Université de

498

Microstructure and dielectric properties of piezoelectric magnetron sputtered w-ScxAl1-xN thin films  

Science Conference Proceedings (OSTI)

Piezoelectric wurtzite ScxAl1 xN (x = 0, 0.1, 0.2, 0.3) thin films were epitaxially grown by reactive magnetron co-sputtering from elemental Sc and Al targets. Al2O3(0001) wafers with TiN(111) seed and electrode layers were used as substrates. X-ray diffraction shows that an increase in the Sc content results in the degradation of the crystalline quality. Samples grown at 400 C possess true dielectric behavior with quite low dielectric losses and the leakage current is negligible. For ScAlN samples grown at 800 C, the crystal structure is poor and leakage current is high. Transmission electron microscopy with energy dispersive x-ray spectroscopy mapping shows a mass separation into ScN-rich and AlN-rich domains for x 0.2 when substrate temperature is increased from 400 to 800 C. The piezoelectric response of epitaxial ScxAl1 xN films measured by piezoresponse force microscopy and double beam interferometry shows up to 180% increase by the addition of Sc up to x = 0.2 independent of substrate temperature, in good agreement with previous theoretical predictions based on density-functional theory.

Zukauskaite, Agne [Linkoping University; Wingqvist, Gunilla [Linkoping University; Palisaitis, Justinas [Linkoping University; Jensen, Jens [Linkoping University; Persson, Per [Linkoping University; Matloub, Ramin [Ecole Polytechnique Federale de Lausanne, Switzerland; Muralt, Paul [Ecole Polytechnique Federale de Lausanne, Switzerland; Kim, Yunseok [ORNL; Birch, Jens [Linkoping University; Hultman, Lars [Linkoping University

2012-01-01T23:59:59.000Z

499

Superhydrophilic TiO2 surface without photocatalytic activation  

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

Superhydrophilic TiO2 surface without photocatalytic activation Superhydrophilic TiO2 surface without photocatalytic activation Title Superhydrophilic TiO2 surface without photocatalytic activation Publication Type Journal Article Year of Publication 2010 Authors Zormpa, Vasileia, Xiaobo Chen, and Samuel S. Mao Journal Applied Physics Letter Volume 96 Issue 9 Date Published 12/2009 Abstract Since the discovery of extreme surface wetting phenomenon induced by ultraviolet photocatalysis, TiO2 has become the material of choice for environmental friendly applications such as self-cleaning coatings. Nevertheless, it remains a significant challenge to realize surfaces exhibiting persistent superhydrophilicity but without the need of external stimuli. We report a bioinspired TiO2 nanostructure that shows extreme superhydrophilicity without the need of light activation, and with stability against successive wetting-dewetting cycles. This ultimate TiO2 wetting surface exhibits high transmittance from near ultraviolet to the infrared, thus enabling practical antifogging technologies where transparency is critical.

500

MAGNETIC PROPERTIES OF THE ALS BOOSTER SYNCHROTRON ENGINEERING MODEL MAGNETS  

E-Print Network (OSTI)

Dynamic Aperture of the ALS Booster Synchrotron." presented25953 MAGNETIC PROPERTIES OF TIIE ALS BOOSTER SYNCIIROlRONMagnetic Measurements of the ALS Booster Dipole Engineering

Keller, R.

2010-01-01T23:59:59.000Z