Method for manufacturing power-metallurgy processed Nb3Sn superconducting wire, precursor to powder-metallurgy processed Nb3Sn superconducting wire

摘要

A method for manufacturing a powder-metallurgy processed Nb3Sn superconducting wire is provided. In the method, a sheath made of Nb or a Nb alloy is filled with a raw material powder containing Sn. The sheath filled with the raw material powder is subjected to diameter reduction to form a wire. The wire is heat-treated to form a superconducting phase at the internal surface of the sheath. The raw material powder is prepared by adding a Sn powder to a Cu-Sn alloy powder or a Cu-Sn intermetallic compound powder, and is compacted under isotropic pressure.