An investigation of Nb-Ti-Ta alloys and properties of the superconductors based on ternary alloys

The vacuum arc melting technique was used to obtain the ingots of Nb-Ti-Ta alloys with 12.3 and 20.4 wt.% Ta. The microhomogeneity of the alloys was investigated by electron probe method and T/sub c/ of the alloys after homogenization was measured in comparison with that of the binary Nb-47.5wt%Ti alloy. Multifilamentary conductors with filament diameter /spl sim/60 /spl mu/m have been fabricated. The characteristics of the wires which have been produced by the regime with 4 intermediate heat treatments are presented.