Metal treatment – Process of modifying or maintaining internal physical... – Superconductive metal or alloy
Patent
1995-06-06
1997-04-15
Simmons, David A.
Metal treatment
Process of modifying or maintaining internal physical...
Superconductive metal or alloy
419 8, 419 29, 419 32, 419 33, 505806, 505807, 505823, H01B 1300
Patent
active
056205325
ABSTRACT:
In a method for manufacturing Nb.sub.3 Al phase by a diffusion reaction of Nb.sub.2 Al phase and Nb phase, a part of the Nb.sub.2 Al phase is remained and dispersed in the Nb.sub.3 Al phase homogeneously as for magnetic flux pinning centers for a high magnetic field. As for a method for dispersing the Nb.sub.2 Al phase homogeneously, a Nb.sub.3 Al group superconducting precursory composition obtained by dispersing Nb particles and Nb.sub.2 Al ultrafine particles by a mechanical alloying method is used, and further, by a conventional method for generating Nb.sub.3 Al phase by a diffusion reaction of Nb and an aluminum alloy, A Nb.sub.3 Al group superconductor can be achieved.
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Charles E. Lundin and Albert S. Yamamoto "The Equilibrium Phase Diagram", Niobium (Columbium)-Aluminum Trans Met Soc AIME (236), pp. 863-872.
ASM Handbook vol. 7 Jun. 1984, pp. 636-638.
Iida Fumio
Suzuki Takaaki
Tada Naofumi
Takahashi Ryukichi
Hitachi , Ltd.
Phipps Margery S.
Simmons David A.
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