METHOD FOR MANUFACTURING OF COMPOSITE SUPERCONDUCTOR USING NIOBIUM-TIN ALLOY Russian patent published in 2000 - IPC

FIELD: electrical engineering, in particular, devices designed for operations in magnetic fields stronger than 10 T, high current density and low hysteresis losses. SUBSTANCE: method involves operations for production of primary composite article, which has external jacket of matrix material and axial cylindrical unit, which is made from niobium and contains longitudinally positioned doping agent. Then, method involves deformation of composite article with intermediate thermal processing in order to produce hexagonal rod, which is cut into units. Then, units are assembled into cases, which are made from copper or tin-copper alloy, and insertion of other elements of superconductor, for example, diffusion barrier from tantalum or niobium. Then, method involves deformation with intermediate thermal processing operations, until desired wire diameter is reached, and running diffuse thermal processing under 600-750 C in order to produce superconducting niobium tin alloy. Goal of invention is achieved by running intermediate processing operations in cycles for each 8-70% of cold deformation under temperature within range of 350-600 C under condition of heating 1 mm of wire by its diameter for 60-5 s. EFFECT: elimination of wire breaks caused by intermetallic niobium-tin compound and decomposition of niobium-titan alloy at intermediate stages of production process due to decreased total heating time by a factor of more than 25. 2 cl, 1 dwg, 2 tbl