Method of fabricating multifilament superconductors

Details Method of fabricating multifilament superconductors Method of fabricating multifilament superconductors

1987-06-15

1988-10-11

Zimmerman, John J.

Metal treatment

Compositions

Heat treating

148 115Q, 148 115C, 29599, H01L 3924

Patent

active

047768991

ABSTRACT:
An improved multifilament superconductor is fabricated by the method in which a tin rod or tin based alloy rod is clad with a copper based alloy tube, the thus obtained copper-clad rod is further clad with a niobium based alloy tube, and a copper material is applied as a stabilizer on an outer peripheral surface of the niobium based alloy tube to form a composite. This composite is then reduced and thermally treated at a temperature ranging from 640.degree. to 770.degree. C. to thereby form an Nb.sub.3 Sn superconductor composite with a filament tube therein. At least one of the copper based alloy tube and the niobium based alloy tube contains 0.1-5.0 at. % titanium, and in addition, the tin based alloy rod may contain 0.1-3.5 at. % titanium. The tin is contained in the copper-clad rod at weight % of about 25-85, preferably 30-80 weight %.

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