Results 111 to 120 of about 10,608 (166)
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Journal of Molecular Catalysis, 1991
Abstract The dehydrogenation of 2-propanol to acetone on Cu 61 Zr 39 alloy has been studied for the first time. The dehydrogenation reaction (flow reactor, 573 K) on as-received or pre- activated (hydrogen, 573 K, 3 h or 473 K, 16 h) alloy brings about a continuous activation of the catalyst.
Árpád Molnár +3 more
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Abstract The dehydrogenation of 2-propanol to acetone on Cu 61 Zr 39 alloy has been studied for the first time. The dehydrogenation reaction (flow reactor, 573 K) on as-received or pre- activated (hydrogen, 573 K, 3 h or 473 K, 16 h) alloy brings about a continuous activation of the catalyst.
Árpád Molnár +3 more
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Uspekhi Fizicheskih Nauk, 1990
The experimental data on the structure of and the structural defects and structural relaxation in amorphous metallic alloys are reviewed. The elastic and inelastic properties of amorphous metallic alloys and the effect of disorder in the arrangement of atoms on the ferromagnetic properties of amorphous metallic alloys are also studied.
I V Zolotukhin, Yu E Kalinin
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The experimental data on the structure of and the structural defects and structural relaxation in amorphous metallic alloys are reviewed. The elastic and inelastic properties of amorphous metallic alloys and the effect of disorder in the arrangement of atoms on the ferromagnetic properties of amorphous metallic alloys are also studied.
I V Zolotukhin, Yu E Kalinin
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Positron Annihilation in Amorphous Alloys
Physica Status Solidi (a), 1979The crystallization process of the amorphous Pd0.845Si0.155, Pd0.80Si0.20, and Ni0.81P0.19 alloys is studied by positron annihilation. The following experimental facts are found. 1. In the PdSi alloy, the changes of coincidence peak counts and h-parameters with temperature are consistent with the crystallization mechanism proposed by Masumoto and ...
S. Tanigawa +5 more
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Magnetic properties of amorphous alloys
Journal of Magnetism and Magnetic Materials, 1978Abstract The preparation of amorphous alloys, or glassy metals, is briefly described, and the basic magnetic properties of these materials are reviewed with emphasis on the properties that are important for engineering applications.
C D Graham, T Egami
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Relaxation of Amorphous Metallic Alloys
Solid State Phenomena, 1998Two types of relaxation processes in amorphous alloys have been investigated in metal-metalloid systems. One of them has been studied by measuring the static structure factor S(Q) in cobalt boron glass samples that have been previously isothermally treated on temperatures close to crystallization temperature.
Davidović, Milorad, Tomić, Predrag
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Diffusion mechanisms in amorphous alloys
Materials Science and Engineering, 1988Abstract A critical analysis of experimental data shows that self-diffusion in relaxed amorphous alloys is controlled by mechanisms involving collective thermal activations. Whereas in FeZr alloys both 59Fe and 95Zr diffuse via direct mechanisms that change with the alloy composition (e.g.
W. FRANK, J. HORVÁTH, H. KRONMÜLLER
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Tracer diffusion in amorphous alloys
Materials Science and Engineering, 1988Abstract Self-diffusion in various iron-based amorphous metal-metalloid alloys and in amorphous metal-metal systems Fe x Zr 100−x was investigated using radioactive 59 Fe and 95 Zr tracer atoms in combination with ion-beam sputtering for serial sectioning.
J. HORVÁTH +3 more
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Amorphous Semiconductor Alloys
SPIE Proceedings, 1985Amorphous silicon (a-Si) based alloys have attracted a considerable amount of interest because of their applications in a wide variety of technologies. However, the major effort has concentrated on inexpensive photovoltaic device applications and has moved from a laboratory curiosity in the early 1970's to viable commercial applications in the 1980's ...
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Properties of amorphous Si:F:H alloys
Journal of Non-Crystalline Solids, 1980Previously we have shown that amorphous silicon-based alloys containing F and H (1–7) possess desirable properties for photovoltaic application. Amorphous tetrahedral semiconductors ordinarily possess a very large density of states which act as traps leading to low values for drift mobility and low recombination lifetimes of free carriers.
A. Madan, S. R. Ovshinsky
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