METHOD FOR PRODUCING SUPERCONDUCTING WIRE, METHOD FOR MODIFYING OXIDE-COATED SUPERCONDUCTING WIRE, AND OXIDE-COATED SUPERCONDUCTING WIRE

摘要

FIELD: superconducting wire manufacture. ^ SUBSTANCE: proposed method for producing superconducting wire includes production of wire material in the form of source powdered metal-covered and oxide-coated superconducting material and heat treatment of wire material obtained in the process in high-pressure environment with total pressure maintained at 1 MPa or higher and below 50 MPa in the course of heat treatment; pressure rise is started with temperature at which 0.2% conventional yield point of metal becomes lower than total pressure in the course of heat treatment. Such procedure makes it possible to eliminate voids between oxide-coated superconducting material crystals and bulging of oxide-coated superconducting wire material, as well as to easily control oxygen partial pressure during heat treatment. ^ EFFECT: enhanced critical current density in wire material obtained. ^ 22 cl, 27 dwg, 3 tbl