公开(公告)号：EP1577903A1

公开(公告)日：2005-09-21

申请号：EP03789636.2

申请日：2003-12-25

申请人： National Institute for Materials Science

发明人： INOUE, Kiyoshi National Inst. For Material Science ,  KIKUCHI, Akihiro, Nat. Inst. For Material Science ,  IIJIMA, Yasuo, National Inst. For MaterialScience ,  TAKEUCHI, Takao, Nat. Inst. For Materials Science

IPC分类号： H01B13/00 ,  H01B12/10 ,  C22F1/00

CPC分类号： H01L39/2409 ,  C22F1/18 ,  Y10T29/49014 ,  Y10T29/49117

摘要： A superfine multi-core Nb 3 Al superconductive wire is produced by getting a Nb 3 Al superconductive wire ready which was obtained by subjecting a precursor wire having a superfine multi-core structure in which a plurality of Nb/Al complex cores are embedded in Nb, Ta, a Nb based dilute alloy, or a Ta based dilute alloy as the matrix to a rapid heating and quenching treatment comprising rapidly heating to a temperature range near 2,000 °C in 2 seconds,

(A) coating the Nb 3 Al superconductive wire with Cu or Ag as the stabilizing material; then
(B) subjecting to a hot isostatic press (HIP) process for 10 minutes or more in a inert gas environment with a pressure of 40 atmospheres or more; and then
(C) subjecting heat treatment for 1-200 hours in temperature range of 680-850 °C, to thereby obtain a method for producing Nb 3 Al superconductive wire and the Nb 3 Al superconductive wire obtained from said method in which: the cost is comparatively low; the wire may be produced to be either round or flat; and the superconductive characteristics is more stabilized.