Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1984-12-31
1985-12-24
Stallard, Wayland
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
29599, 148 115P, 264 8, H01L 3924
Patent
active
045604045
ABSTRACT:
A method of producing a composite material of and Nb or V used for a superconductive wire comprises vacuum - melting two kinds of raw materials, 70 wt % Cu and 30 wt % Nb or V to form a melt; scattering the melt by a rotating disc to form a plurality of fine droplets each of which includes Cu and Nb or V at substantially the same compounding rate as the raw materials; and cooling rapidly the fine droplets by spraying an inert gas onto the scattering droplets thereby providing particulate bodies each of which dendrites of Nb or V are precipitated in Cu. The fine particles are compression - molded to form a molded product. The molded product is sintered to form an ingot in which the dendrites of Nb or V are dispersed homogeneously in the Cu base. The ingot is used for producing a superconductive wire, namely, it is subjected to cold rolling to reduce its sectional area, coating with Su or Ga, and diffusion heat-treating the wire to form Nb.sub.3 Sn or V.sub.3 Ga in the Cu base, whereby a superconductive wire is provided in which Nb.sub.3 Sn or V.sub.3 Ga are homogeneously dispersed in the Cu base.
REFERENCES:
patent: 3290186 (1966-12-01), Rosi et al.
patent: 3407049 (1968-10-01), Freeman, Jr. et al.
patent: 3541680 (1970-11-01), Verrijp
patent: 4050147 (1977-09-01), Winter et al.
Aihara Katsuzo
Ishihara Joo
Ogawa Toshio
Suzuki Yasuo
Tada Naofumi
Hitachi , Ltd.
Stallard Wayland
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