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Effect of additional element on the high-field performance of niobium(3)-tin superconductors prepared from intermediate compound.

[In Japanese. / En japonais.]

Author(s) : TACHIKAWA K., UEDA M., YAMAMOTO S., YOKOYAMA T.

Type of article: Article

Summary

Niobium(3)-tin superconductors have been fabricated through a new process starting from niobium(6)-tin(5) intermediate compound powder. The mixed niobium(6)-tin(5) and niobium powder is encased in a tantale tube, and rolled into tapes without annealing and then heat treated. In this study, the effects of different additional elements on the high-field performance of the new niobium(3)-tin specimen were studied. The addition of copper to the specimen decreases the optimum heat-treatment temperature from 900-925 to 850 deg C. The addition of a small amount of germanium or the substitution of a small amount of tantale for niobium raises the curvature of the log core-B curves of specimens to a convex at high magnetic fields, resulting in significant enhancement in high-field performance.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1999-2084
  • Languages: Japanese
  • Source: Cryogenics/ Cryog. Eng. - vol. 33 - n. 5
  • Publication date: 1998/05
  • Document available for consultation in the library of the IIR headquarters only.

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