| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a superconducting wire rod with a large-diameter NbTi system alloy filament capable of securing a high n-value and a high Jc, and to provid a method of manufacturing the same. <P>SOLUTION: The NbTi system superconducting wire rod has a plurality of NbTi alloy filaments embedded in a copper matrix, with a copper ratio (a lateral cross-section area of the copper matrix/a total cross-section area of all the NbTi alloy filaments) of 0.7 to 3.5, and an average diameter d of the NbTi alloy filament of 100 to 150μm. Further, an area ratio of a stratifiedα-Ti phase on a cross-section face of the NbTi alloy filament is 15 to 25%, and that, an average interlayer interval of theα-Ti phase of a d/4 portion of the above cross-section face is 10 to 20 nm. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
