| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of an NbTi superconducting multi-layer plate, and an NbTi superconducting multi-layer plate having large critical current density which can be manufactured by heat treatment within a short time at low cost. SOLUTION: The NbTi superconducting multi-layer plate is formed by arranging plate-shaped NbTi alloy layers in Cu or Cu alloy base materials through Nb layers. Plate-shaped normal conducting depositions, having a thickness of not more than 1 nm and not less than 100 nm, a distance in a plate thickness direction of not less than 1 nm and not more than 500 nm, and a volume percentage to the total volume of the NbTi alloy layer of not less than 3% and not more than 50%, are deposited in parallel with a plate face in the NbTi layer. On the manufacturing method, the superconducting multi-layer is formed into a plate shape or foil shape by applying cold rolling with a processing percentage of 30 to 98% after hot rolling with a processing percentage of 30 to 98% at 500 to 1,000°C, and repeating a heat treatment with a holding time of 1 to 168 hours at every turn and the cold rolling with a processing percentage of 30 to 98% by six times or less at 300 to 450°C. Afterwards, cold rolling of a 30 to 90% processing percentage is applied after heat treatment with a holding time of 168 to 1,000 hours at 300 to 450°C. COPYRIGHT: (C)2006,JPO&NCIPI
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