Patent Number: 6,251,529

Title: Nb-Sn compound superconducting wire precursor, method for producing the same and method for producing Nb-Sn compound superconducting wire

Abstract: An Nb--Sn compound superconducting wire precursor comprising a matrix of a Cu-base metal, a plurality of composite filaments each composed of a niobium layer of an Nb-base metal and a titanium layer of pure Ti formed so as to be enveloped in the inside of the niobium layer, and Sn diffused in the matrix by heat treatment so as to be combined with the niobium layer to form a compound, the plurality of composite filaments being embedded in the matrix so as not to be in contact with one another. Further, disclosed is a method for producing the precursor comprising the steps of: forming a plurality of composite filament materials each composed of a niobium material of an Nb-base metal and a titanium material of pure Ti formed so as to be enveloped in the inside of the niobium material; forming a composite rod in which the plurality of composite filament materials are arranged in a matrix of a Cu-base metal so as not to be in contact with one another, the matrix containing Sn capable of being diffused by heat treatment so as to be combined with the niobium material to form a compound; and drawing the composite rod.

Inventors: Kubo; Yoshio (Tokyo, JP)

Assignee: Mitsubishi Denki Kabushiki Kaisha

International Classification: B32B 15/01 (20060101); H01L 39/24 (20060101); B32B 015/00 ()

Expiration Date: 06/26/2018