Tråd för Nb3X superledare

摘要

Disclosed herein is a wire for an Nb3X superconducting wire, which is improved in workability and soundness of a diffusion barrier layer without increasing the diffusion barrier layer in thickness. This wire for an Nb3X superconducting wire comprises a wire (14) which is prepared by superposing and winding up a first sheet (107) consisting of pure Nb or an Nb alloy and a second sheet (108) consisting of metal atoms X, reacting with Nb for forming a compound exhibiting superconductivity, or an X alloy, a stabilizing material layer (111) which is provided to enclose the wire (14), and a diffusion barrier layer (110) which is provided between an outer surface of the wire (14) and an inner surface of the stabilizing material layer (111) for preventing the metal atoms X from being diffused in the stabilizing material layer (111), and the diffusion barrier layer (110) is made of a metal material having larger tensile strength than that of the first sheet (107). It is possible to obtain a high-performance Nb3X superconducting wire having a high critical current density and a large residual resistance ratio of the stabilizing material, by heat treating this wire. <IMAGE>