Multifilament superconductors

Details Multifilament superconductors Multifilament superconductors

1975-12-23

1977-01-11

Steiner, Arthur J.

Metal treatment

Compositions

Heat treating

291916, 29599, 148 34, H01L 3900

Patent

active

040025047

ABSTRACT:
A multifilament composite superconductor which comprises (1) a matrix she selected from the group consisting of a copper-gallium (Cu--Ga) alloy with a gallium content from 0.4 to 22 at.%, a copper-tin (Cu--Sn) alloy with a tin content from 1 to 11 at. %, and a copper-silicon (Cu--Si) alloy with a silicon content from 0.5 to 14 at. %; (2) multiple filaments embedded in said encasing matrix sheath and selected from the class consisting of a vanadium -gallium (V--Ga) alloy with a gallium content from 0.4 at. % to 12.5 at. %, a niobium-tin (Nb--Sn) alloy with a tin content from 0.1 at. % to 12.0 at. %, and vanadium-silicon (V--Si) alloy with a silicon content from 0.5 to 10 at. %; and (3) a continuous interfacial layer between said matrix and each filament of an A-15 compound selected from the class consisting of V.sub.3 Ga, Nb.sub.3 Sn, and V.sub.3 Si. A method for producing said multifilament composite superconductors by mechanical deformation of a multifilament coaxial cylinder consisting of filaments and matrix sheath which comprises a homogenization anneal of the filaments and the matrix rod before assembly thereof, a series of reductions followed by anneals, and a solid stage reaction between the filaments and matrix in vacuum or an inert atmosphere and at a temperature from about 475.degree. to 700.degree. C for the production of V.sub.3 Ga and V.sub.3 Si and at a temperature from about 525.degree. to about 850.degree. C for the production of Nb.sub.3 Sn.

REFERENCES:
patent: 3910802 (1975-10-01), Wong
patent: 3926684 (1975-12-01), Howe

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