Nb3Sn SUPERCONDUCTIVE WIRE, PRECURSOR THEREFOR, AND Nb COMPOUND SINGLE CORE FOR PRECURSOR

摘要

PROBLEM TO BE SOLVED: To provide a precursor (superconductive wire precursor) allowing an element such as Ti to be effectively included in a Nb3Sn phase without causing inconvenience such as disconnection when a Nb3Sn superconductive wire is manufactured by an internal Sn method; a Nb3Sn superconductive wire manufactured by using such a precursor; and a Nb compound single core or the like for constituting a precursor.

SOLUTION: This Nb compound single core constituting a superconductive wire precursor used in manufacturing this Nb3Sn superconductive wire by an internal Sn method is structured such that a cylindrical layer formed of a Nb-based alloy containing one or more kinds of elements selected from a group comprising Ti, Ta, Zr and Hf or a nearly-cylindrical layer formed by combining a plurality of plate-like members formed of the Nb-based alloy is arranged around a Nb core; a cylindrical layer formed of Nb is arranged in the periphery of the cylindrical layer or the nearly-cylindrical layer; and a layer formed of Cu or a Cu-based alloy is arranged around the cylindrical layer formed of Nb.

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