COMPOSITE SUPERCONDUCTOR PRODUCTION PROCESS Russian patent published in 1996 - IPC

FIELD: electrical devices, primarily those designed for operation in magnetic fields of flux density higher than 10 T, high current density, and low hysteresis loss. SUBSTANCE: method involves formation of primary composite billet that has cylindrical niobium block with cavity over entire length to receive doping insert, such as, for example, bar, manufacture of secondary composite billet that has external $$$ alloy jacket and primary billet, deformation of composite obtained to desired sectional area with intermediate heat treatment operations and repeated assembly in jacket and deformation, as well as diffusion heat treatment at 600-800 C to form superconducting compound $$$; doping insert is made of $$$ alloy containing 10-60 mass percent of titanium; in assembling primary billet, additional jacket made of Nb or $$$ is fitted between cylindrical niobium block and doping insert to retain initial geometry of doping insert. In the process, geometry of composite fibers, such as niobium-niobium/titanium ones, is not distorted as distinct from fibers artificially doped with pure titanium which makes it possible to produce single wire sections of 1.0 mm in diameter and more than 1.0 km in length. EFFECT: improved uniformity of doping component distribution throughout composite material length. 5 dwg, 1 tbl