Nb3Sn superconducting wire and precursor for the same

摘要

A precursor for manufacturing a Nb 3 Sn superconducting wire by bronze method, in which plural Nb or Nb-based alloy cores are buried in a Cu-Sn-based alloy base material. The Cu-Sn-based alloy base material comprises Ti and/or Zr in addition to Sn, and these components satisfy the equations (1) and (2) below: 0.4 ‰¦ X - 15.6 / Y ‰¦ 1.9
and 15.6 < X ‰¦ 19
where the symbol X denotes the content of Sn in mass% and the symbol Y denotes the total content of Ti and Zr in mass%.