Results 141 to 150 of about 318,126 (177)

Methane combustion over Pd/Ni-Al oxide catalysts: Effect of Ni/Al ratio in the Ni-Al oxide support

Korean Journal of Chemical Engineering, 2018
We prepared xNi-2Al oxide (x=0-1.1) supports via a hydrothermal method, and applied Pd/xNi-2Al catalysts in the catalytic methane combustion reaction. It was found that the physicochemical properties of the xNi-2Al supports varied as a function of the Ni content, and the interaction between support and impregnated Pd was also influenced by the Ni ...
Eunpyo Hong, Su-A Jeon, Sang-Sup Lee, Chae-Ho Shin   +3 more
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Miscibility gap in Fe-Ni-Al and Fe-Ni-Al-Co systems

Metallurgical Transactions A, 1984
The phase equilibria in Fe-Ni-Al and Fe-Ni-Al-Co systems have been investigated by the diffusion couple technique, and the miscibility gap that separates α1 (Fe-rich disordered bcc phase) from α2 (NiAl-rich ordered bcc phase) has been determined. It has been ascertained that the three-dimensional shape of the miscibility gap is not simple helmetlike ...
Shi Ming Hao, T. Takayama, K. Ishida, T. Nishizawa   +3 more
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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.
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Ordering reactions in Ni-Al-Mo-Ta and Ni-Al-Mo-W superalloys

Metallurgical Transactions A, 1985
The ordered structures formed in two experimental nickel base superalloys have been determined using selected area electron diffraction. Upon quenching from 1300 °C, the alloys contained ordered γ′ precipitates (L12 structure) and the matrix exhibited diffuse intensity at {1 1/2 0} positions, indicating the presence of short range order.
J. C. Williams, P. L. Martin
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Internal oxidation of NiAl and NiAlSi alloys at the dissociation pressure of NiO

Acta Metallurgica et Materialia, 1994
Abstract NiAl and NiAlSi alloys were internally oxidized at temperatures of 1073–1273 K by the Rhines Pack method. For the NiAl alloy, the oxidation process follows parabolic law and the oxidation front was flat with severe integranular oxidation occurring at 1073 K and extensive grain boundary sliding at 1273 K.
H.C. Yi, S.W. Guan, W.W. Smeltzer, A. Petric   +3 more
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Morphological and crystallographic features of ?-?? Ni-Al and Ni-Al-Ti two-phase bicrystals

Journal of Materials Science, 1982
Severalγ-γ′ Ni-Al and Ni-Al-Ti two-phase bicrystals were made by the solid-state diffusion couple method. Each couple consisted of aγ′-phase single crystal and a pure-Ni polycrystal, and was annealed at 1473 K in an Ar gas atmosphere. Single crystal layers ofγ-phase with uniform thickness always grow into the parentγ′-phase single crystals.
Hisami Kawazoe, Takayuki Takasugi, Osamu Izumi   +2 more
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Effects of nanoscale Ni, Al, and Ni–Al interlayers on nucleation and growth of diamond on Si

Journal of Vacuum Science & Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phenomena, 2010
Diamond nucleation experiments on Si wafers, precoated with Ni, Al, and Ni–Al duplex intermediate layers, have been conducted in a microwave plasma enhanced chemical vapor deposition reactor. The diamond nucleation density is dependent on the thickness of the single Ni interlayer and also the ratio of Ni/Al.
Y. S. Li, Y. Tang, Q. Yang, A. Hirose
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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
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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
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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
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