Manufacture of superconducting members

Details Manufacture of superconducting members Manufacture of superconducting members

1978-08-07

1979-12-04

Stallard, W.

Metal treatment

Compositions

Heat treating

29599, H01L 3924

Patent

active

041770870

ABSTRACT:
In the manufacture of a superconducting member fine filaments of niobium or vanadium in a bronze matrix are formed by mechanical reduction, e.g. by drawing, and by solid state reaction the filaments are converted to superconducting filaments of a compound of niobium or vanadium with, typically, one or more of the elements aluminium, gallium, indium, silicon, germanium and tin included in the bronze. Phosphorus is included in the bronze but care is taken to ensure that the bronze in contact with the filaments is free of unwanted impurities and in particular has a very low concentration of phosphorus, desirably in the range 0.01 to 0.05 percent by weight.

REFERENCES:
patent: 3465430 (1969-09-01), Barber et al.
patent: 3570118 (1971-03-01), Reynolds et al.
patent: 3918998 (1975-11-01), Marancik et al.
patent: 3958327 (1976-05-01), Marancik et al.
Merriman, A. D.; A Dictionary of Metallurgy; Macdonald & Evans, Ltd., London, 1958; p. 225.

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