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Improvement of Critical Current Density in the Bronze-Processed Nb3Sn Superconductor

  • T. Miyazaki
  • N. Matsukura
  • T. Miyatake
  • M. Shimada
  • K. Takabatake
  • K. Itoh
  • T. Kiyoshi
  • A. Sato
  • K. Inoue
  • H. Wada
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 44)

Abstract

The superconductors with bronze matrix of Cu-15wt%Sn-0.3wt%Ti were fabricated on a commercial scale. The number of filaments and Cu to non Cu ratio of the conductors were 25099 and 0.3, respectively. A non Cu Jc of 980 A/mm2 at 12 T, 4.2 K was obtained for a conductor with a round cross section in diameter of 0.7 mm. A rectangular shaped conductor, i. e. 1.75 mm × 3.50 mm, showed a non Cu Je of 133 A/mm2 at 21 T and 1.8 K, corresponding to a critical current of 620 A. The dependence of non Cu Jc on heat treatment conditions is also reported. These characteristics are considered with results from microscopic observations and relations with upper critical fields based on the pinning properties.

Keywords

Critical Current Density Field Region Heat Treatment Condition High Field Region Magnetic Field Region 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1998

Authors and Affiliations

  • T. Miyazaki
    • 1
  • N. Matsukura
    • 1
  • T. Miyatake
    • 1
  • M. Shimada
    • 1
  • K. Takabatake
    • 1
  • K. Itoh
    • 2
  • T. Kiyoshi
    • 2
  • A. Sato
    • 2
  • K. Inoue
    • 2
  • H. Wada
    • 2
  1. 1.Kobe Steel Ltd.KobeJapan
  2. 2.National Research Institute for MetalsTsukuba 305Japan

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