To provide a NbTi superconductive multilayer plate having a Jc of practical level with a heat treatment time shorter than in a conventional NbTi superconductive multilayer plate and a process number smaller than the manufacturing process of a conventional NbTi superconductive wire rod, and also to provide a NbTi superconductive multlayer plate having a further high Jc by extending the heat treatment time and its manufacturing method.
This NbTi superconductive multilayer plate has the structure in which a NbTi layer and a highly conductive metallic layer are alternately laminated in two or more layers through a Nb layer or Ta layer. In this plate, the Ti content of the NbTi layer is 50-60 mass%, 5.5% or more of a normally conductive phase of Ti 20 nm or less in thickness is present, in terms of area ratio, on the thickness directional section, and the fluctuation coefficient of thickness of the NbTi layer in the rolling directional section is 30% or less.
COPYRIGHT: (C)2005,JPO&NCIPI
Ikuo Ito
JP11330574A |
Tomoyuki Yabuki