A combination bronze-in situ process for preparation of superconducting wire

Superconducting Nb3Sn-Cu wire has been prepared by placing rods of Cu-60 wt.% Nb in situ material in a bronze matrix and reducing to wire. The Jcvalues of the wire are lower than that of commercial bronze processed wire by a factor of 2, which is consistent with the fact that the Br/Nb ratio is higher then commercial wires by roughly a factor of 2. It is anticipated that these bronze-in situ wires may display smaller degradation of Jcwith mechanical strain than conventional bronze processed wire.