Process for the manufacture of a corrugated copper-stabilized Nb3Sn super-conductor

The manufacture of such super-conductors is made expensive by the necessity of applying a suitable Sn layer on to the corrugated Nb surface. According to the invention, copper is brushed on to the surface before making Nb tape into the slotted tube and it is applied electrolytically with a thickness of 0.4-0.6 mm. Copper is then brushed on to the other side and electrolytically strengthened (40-80 μm). During shaping, this side is on the outside. During welding, only the copper layer is welded and the Nb layer forms a small gap. The tube is corrugated and the pre-treated outside surface is tinned (galvanized, flame spray process). Subsequent diffusion annealing takes place at 8000C. (LU)