| 摘要 |
PURPOSE:To manufacture the titled wire superior in characteristic in high magnetic field, by arranging a core body having a proper diameter composed of Ti, Ta, In, Hf, Al, Zr, etc., at center part of an Nb core material and applying diffusion heat treatment in matrix contg. Sn. CONSTITUTION:The core body 1 composed of one kind or more among Ti, Ta, In, Hf, Al, Zr being the third element for improving critical current value in high magnetic field range of Nb3Sn is inserted in an Nb pipe 2 to form the Nb core material 3 being a composite rod. The body 1 is arranged at the center part of the material 3, and the diameter is regulated to 20-60% of the diameter of the material 3. Next, the material 3 is arranged to an inner part of a matrix 12 contg. Sn and the diffusion heat treatment is applied. In this way, Nb3Sn is formed at the outer circumferential part of the body 1. In this way, the titled wire having good workability at diameter reduction working, high critical current density, light weight, high mechanical strength and exhibiting good superconducting characteristic is obtd.
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