METHOD FOR JOINING SECOND GENERATION REBCO HIGH TEMPERATURE SUPERCONDUCTORS USING PARTIAL MICRO-MELTING DIFFUSION WELDING BY DIRECT CONTACT OF HIGH TEMPERATURE SUPERCONDUCTORS AND FOR RECOVERING SUPERCONDUCTING CHARACTERISTICS BY OXYGEN SUPPLY ANNEALING HEAT TREATMENT

摘要

Disclosed is a splicing method of two second-generation ReBCO high temperature superconductor coated conductors (2G ReBCO HTS CCs), in which, with stabilizing layers removed from the two strands of 2G ReBCO HTS CCs through chemical wet etching or plasma dry etching, surfaces of the two high temperature superconducting layers are brought into direct contact with each other and heated in a splicing furnace in a vacuum for micro-melting portions of the surfaces of the high temperature superconducting layers to permit inter-diffusion of ReBCO atoms such that the surfaces of the two superconducting layers can be spliced to each other and oxygenation annealing for recovery of superconductivity which was lost during splicing.