Production method of compound-type superconducting wire

Details Production method of compound-type superconducting wire Production method of compound-type superconducting wire

1981-10-20

1983-06-07

Stallard, W.

Metal treatment

Compositions

Heat treating

29599, H01L 3900, B22F 316

Patent

active

043869700

ABSTRACT:
The specification describes a method for producing compound-type superconducting wire of excellent mechanical and electrical properties. A green compact is first formed with copper powder and one of two metals which form a superconducting compound through a reaction therebetween. The latter metal is in a very fine hydrogenated form. The green compact is then heated in vacuo so as to dehydrogenate the hydride of the latter metal and sinter the green compact into a sintered mass. Before or after drawing the sintered mass into a wire, it is composited with the other metal of the two metals, thereby forming a composite wire. It is then subjected to a further heat treatment to cause the reaction to occur between the two metals. To improve its properties, it may be held in a high temperature, high pressure gaseous atmosphere to cause plastic deformation to occur. Since the dehydrogenation and annealing are performed in a single step, the overall process has been simplified. Since the latter metal is dispersed uniformly in the form of highly pure and ultra-fine particles in the Cu-matrix of the sintered mass, it can be drawn very smoothly into a wire and the reaction between the two metals can occur easily. The two metals may for example be Nb and Sn or V and Ga.

REFERENCES:
patent: 3196532 (1965-07-01), Swartz et al.
patent: 3290186 (1966-12-01), Rosi et al.
patent: 3752665 (1973-08-01), Roy et al.
patent: 4202931 (1980-05-01), Newkirk et al.

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