WORKPIECE FOR PRODUCTION OF SUPERCONDUCTING COMPOSITE WIRE BASED ON NB3SN Russian patent published in 2021 - IPC H01B12/10 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering when creating long composite wires based on superconducting compounds intended for making electrical products. Billet for fabrication of superconducting composite wire based on Nb₃Sn consists of copper jacket. Inside the cover there is a copper-containing matrix, in the center of which there is a rod containing tin. Around the rod containing tin, there are multiple niobium-containing rods in the copper-containing shell. Copper-containing matrix is surrounded by diffusion barrier. Niobium-containing bar is a composite containing a matrix of niobium or its alloy reinforced with Nb-Ti alloy fibers, which are located at the distance of not less than one average size of Nb-Ti alloy fiber to border with copper-containing shell and distance between which is not less than one average size of Nb-Ti alloy fiber.

EFFECT: invention provides high current-carrying capacity in a superconducting composite wire based on Nb₃Sn in magnetic fields with induction higher than 12 T.

10 cl, 8 dwg