| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an Nb<SB POS="POST">3</SB>Sn superconducting wire having high critical current density (Jc), in which degradation in superconducting characteristics with respect to compression (degradation rate of the critical current density) can be suppressed, and a method for manufacturing the Nb<SB POS="POST">3</SB>Sn superconducting wire. <P>SOLUTION: In manufacturing an Nb<SB POS="POST">3</SB>Sn superconducting wire, heat treatment is performed to an Nb<SB POS="POST">3</SB>Sn superconductive precursor wire 1, so that Sn in an Sn core material 24 is diffused into an Nb core material 21 to produce Nb<SB POS="POST">3</SB>Sn. The Nb<SB POS="POST">3</SB>Sn superconductive precursor wire 1 includes: a Cu tube 5 made of Cu or a Cu-alloy; a plurality of filament assemblies 2, each of which is disposed in the Cu tube 5, and includes a plurality of Nb element wires 20 including an Nb core material 21 made of Nb or an Nb alloy and a plurality of Sn element wires 23 including an Sn core material 24 made of Sn or an Sn alloy; and a plurality of Ta element wires (reinforcing element wires) 30 disposed in the Cu tube 5 and dividing the filament assemblies 2 such that the filament assemblies 2 are not adjacent to each other. <P>COPYRIGHT: (C)2013,JPO&INPIT |
