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Critical-current density improvement of internal-tin-diffusion niobium-tin wires by rapid heating.

[In Japanese. / En japonais.]

Author(s) : HIGUMA H., KUBO Y., MIYASHITA S., EGAWA K., NAGAI T., UCHIKAWA F., SATO K.

Type of article: Article

Summary

In the new heat treatment, niobium-tin filaments were formed by rapidly putting the wire into furnace kept at 675 deg C (rapid heating). In high fields, the critical-current density value at 12 T and at 4.2 K, for the rapid-heated wire was higher than that for the step-heated wire. The superconducting transition width of the rapid-heated wire was narrower. The niobium-tin composition ratio of the rapid-heated wire was nearer to the stoichiometry than those of the step-heated wire. It was suggested that internal tin was diffused more smoothly to niobium filaments by this rapid heating.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1994-2768
  • Languages: Japanese
  • Source: Cryogenics/ Cryog. Eng. - vol. 28 - n. 9
  • Publication date: 1993
  • Document available for consultation in the library of the IIR headquarters only.

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