Patent ID: 7216418
Filing Date: 2007-05-15
Classification: H01L,Y10S,Y10T

Abstract:
1. A method for producing a multifilament Nb 3 Sn superconducting wire comprising the steps of: a) packing a plurality of Nb or Nb alloy rods within a copper containing matrix to form a packed subelement for said superconducting wire; b) packing divider rods amongst the Nb or Nb alloy rods in the copper containing matrix along with Ta divider strips to thereby divide said subelement into regions bounded by said divider rods and strips; said divider strips further being positioned within a Nb or Nb alloy diffusion barrier which surrounds said subelement as to prevent the Nb or Nb alloy barrier from reacting during a subsequent diffusion step for forming said Nb c) providing sources of Sn within said subelement; d) assembling a plurality of said subelements within a further copper containing matrix; e) reducing said assemblage of step(d) to wire form; and f) diffusing the said Sn into the Nb or Nb alloy rods to form Nb