Results 191 to 200 of about 8,279,692 (223)

Magnetoresistance study in Ni–Al–Ni and Al–Ni–Al tunneling junction systems

Journal of Magnetism and Magnetic Materials, 2002
Abstract Magnetoresistance (MR) in Ni–Al–Ni and Al–Ni–Al tunneling junction systems have been studied at temperatures between 40 mK and 4 K and in magnetic fields up to 3 T. In Ni–Al–Ni system, the resistance increases with increasing applied magnetic field at low fields. This is a typical anisotropy MR for ferromagnetic Ni wire electrodes.
C.D. Chen, Y.D. Yao, S.F. Lee, D.S. Chung   +3 more
openaire   +1 more source

The Strength of Certain NIAlTa and NiAlHf Alloys Containing γ′ and β- Phases

physica status solidi (a), 1982
The temperature dependence of certain NiAlTa and NiAlHf superalloys are investigated. From this investigation it is hoped to determine the potentialities of good elevated temperature properties by a solution of tantalum and hafnium, based on the γ′ phase.
Baldan A., West D.R.F.
openaire   +1 more source

Calculation of the Ni-Al-W, Ni-Al-Hf and Ni-Cr-Hf systems

Canadian Metallurgical Quarterly, 1975
AbstractComputer analysis of the W-Ni,W-Al, Ni-Al, Hf-Ni, Hf-Al, Hf-Cr, Al-W-Ni, Al-Ni-Hf and Hf-Cr-Ni systems has been carried out in order to predict the isothermal sections and liquidus projections for these systems. The present results indicate that the Al-W-Ni and Hf-Cr-Ni systems offer opportunities for the growth of in-situ composites by means ...
L. Kaufman, H. Nesor
openaire   +1 more source

Martensitic transformation behavior in Ni–Al and Ni–Al–Re melt-spun ribbons

Scripta Materialia, 2004
Abstract The martensitic transformation behavior was investigated in rapidly solidified (melt-spun) Ni–(34–37)at%Al and Ni–(32–34)at%Al–2at%Re ribbons. The addition of Re increased the temperature for the formation of Ni 5 Al 3 , hence the martensitic transformations were observed at higher temperatures than those of binary Ni–Al alloys.
Hee Young Kim, Shuichi Miyazaki
openaire   +1 more source

Coarsening kinetics of γ′ precipitates in Ni-Al and Ni-Al-Mo alloys

Journal of Materials Science, 1996
The ordered L12 γ′ precipitate coarsening kinetics without the influence of an external stress were studied in a Ni-Al(13.5 at%) alloy at 1413 K and a Ni-Al(13.8 at%)-Mo(5.9 at%) alloy at 1443 K. The Ni-Al-Mo alloy has a lattice mismatch of about −0.3% at the ageing temperature while the Ni-Al has a positive lattice mismatch of about 0.25% at the ...
openaire   +1 more source

Phase equilibria in nickel rich Ni–Al–Mo and Ni–Al–W alloys

Metal Science, 1983
AbstractPhase equilibria have been investigated in the Ni rich regions of the Ni–Al–Mo system at 1473 K and of the Ni–Al–W system at 1523 and 1273 K using electron microprobe analysis, X-ray diffraction, and optical metallography. The phase relationships at 1473 and 1523 K are similar in the two systems showing three-phase equilibria of γ + γ′ + α (Mo ...
P. Nash, S. Fielding, D. R. F. West
openaire   +1 more source

The Influence of Diamond Addition to Ni-Al Powder on Oxidation Behavior of Ni-Al During Plasma Spraying for High Performance Oxide-Free Ni-Al Intermetallic Coating

International Thermal Spray Conference, 2021
Abstract Ni-Al intermetallics have excellent corrosion and oxidation resistance, but their use in thermal spraying has been limited due to issues with in-flight oxidation. In this study, a novel approach is proposed to remove oxide from Ni-Al droplets in-flight by adding a deoxidizer (diamond) to the feedstock powder. A mixture of nickel,
Li Zhang, Di Wang, Xian-Jin Liao, Xiao-Tao Luo, Chang-Jiu Li   +4 more
openaire   +1 more source

Coarsening kinetics of coherent precipitates in Ni-Al-Mo and Fe-Ni-Al alloys

Materials Science and Engineering: A, 1997
Abstract The late stage coarsening kinetics of coherent γ′ and β′ have been investigated in single crystalline specimens of Ni-14.5 at.% Al-5.9 at.% Mo and Fe-10 at.% Ni-15 at.% Al after aging at 1453 K for the Ni alloy and 1233 K for the Fe alloy.
H.A. Calderon, G. Kostorz, Y.Y. Qu, H.J. Dorantes, J.J. Cruz, J.G. Cabanas-Moreno   +5 more
openaire   +1 more source

Development of Ni–Al and Ni–Al–Fe intermetallic coatings on carbon tool steels

Surface Engineering, 1997
Intennetallic coatings of Ni–Al and Ni–Al–Fe have been developed on carbon tool steel substrates. Nickel coatings with thicknesses of 20 and 40 f.1m were deposited on prealuminised specimens. Diffusion annealing was subsequently carried out at a temperatureof 1050oe.
M. Salehi, M. Shamanian, F. Ashrafizadeh
openaire   +1 more source

An investigation of the mechanism of thermally activated deformation in certain NiAlTa and NiAlHf superalloys

Physica Status Solidi (a), 1984
Stress relaxation and strain-rate cycling tests are conducted between room temperature and 800 °C to ascertain the deformation mechanisms in terms of “athermal” and thermally activated processes. Stress relaxation is analysed by using a computer program and incremental unloading technique.
openaire   +2 more sources