High-current A-15 microcomposite materials

Abstract
Powder metallurgy is used as an alternative process to produce Nb3Sn and V3Ga composite superconductors with large critical transport currents in magnetic fields above 15 T. Whereas for a Cu–30 wt.%Nb +Sn composite the overall current density Jc amounts to 1.0×108 A/m2 at 16 T, values in excess of 4×108 A/m2 (16 T) are observed for Cu–30 wt.% V+Ga composites.