| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing an Nb3Al compound superconductive wire and the wire in which stabilizer layers excellent in adhesiveness can be composed with each other. SOLUTION: A jelly roll laminated complex is prepared by superposing a pure Nb sheet 1 and a pure Al sheet 2 one on another. The complex is formed into a single-core billet, to be machine into a wire in the form of a hexagon in cross section, followed by removing a Cu layer, thereby preparing a single wire 6. The plurality of single wires 6 are incorporated in an Nb tube 7, and further, inserted into a Cu-Ni alloy tube 8, thereby obtaining a multi-core billet 9. Subsequently, the outer Cu-Ni alloy layer is removed, thus obtaining a composite multiple wire 10. An Nb-Al supersaturated solid solution is produced in the obtained Nb/Al composite wire. A first stabilizer layer 11 is formed at the surface of the supersaturated solid solution, and further, a second stabilizer layer is formed on the first layer 11. The resultant wire is subjected to heat treatment again in vacuum for a fixed time, so as to deposit an Nb3Al phase, thus obtaining an Nb3Al compound superconductive wire 12 provided with the stabilizer layers.
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