A method for producing electrical superconductors consisting of a great number parallel spaced thin filaments of a superconductive material in which diffusion is effected in parallel spaced zones between two adjoining metallic layers, one being vanadium and the other a copper-gallium alloy by utilization of a foreign substance between the layers establishing similar parallel spaced zones in which diffusion of gallium into the vanadium is either prevented or the superconductive properties of the inter-metallic compound formed by the diffusion is considerably reduced. The layered material with the foreign substance therebetween is formed into rods the axis of which corresponds to the direction of the parallel spaced zones; these rods are then embedded in a cylinder of a highly electrical conductive matrix material such as copper or aluminum, after which the matrix cylinder is subjected to a drawing operation to effect a reduction in its cross section and hence also the cross sections of the rods embedded therein, and then heat-treated to effect the desired diffusion of gallium from the copper-gallium layers to the adjacent vanadium layers along the parallel spaced zones between zones in which diffusion has been prevented or the superconductive properties of the inter-metallic compound formed at such zones have been reduced by the presence of the foreign substance.
申请公布号
DE2230254(B2)
申请公布日期
1979.09.20
申请号
DE19722230254
申请日期
1972.06.21
申请人
BBC AG BROWN, BOVERI & CIE, BADEN, AARGAU (SCHWEIZ)
