Preparation and precursors therefor powder method Nb3Sn superconducting wire

摘要

PROBLEM TO BE SOLVED: To provide a precursor for manufacturing an Nb₃Sn superconductive wire rod in which superior superconductive characteristics are demonstrated and in which there is no occurrence of a workability problem in extrusion and drawing works or the like in manufacturing the powder method Nb₃Sn superconductive wire rod, and provide a useful method to manufacture the above superconductive wire rod.;SOLUTION: The precursor for manufacturing of the Nb₃Sn superconductive wire rod is constituted so that a composite member in which a raw material powder containing at least Sn is filled into a sheath composed of Nb or an Nb alloy is embedded and installed in a copper matrix part in a plurality of number, and a copper ratio expressed by the ratio of a crosssectional area of a copper part and a crosssectional area of a non-copper part (crosssectional area of copper part/crosssectional part of non-copper part) in the crosssectional face in the direction perpendicular to the longitudinal direction is 0.3 or more and 1.8 or less.;COPYRIGHT: (C)2007,JPO&INPIT