Resin-impregnated bulk YBCO current leads for Maglev

M. Tomita, K. Nagashima, M. Murakami, T. Herai

研究成果: Article査読

13 被引用数 (Scopus)

抄録

Recent advancement in the fabrication techniques has allowed the production of large grain bulk RE-Ba-Cu-O (RE: rare earth elements) superconductors with large critical current density. The current leads can be machined from such large disks. However, the stress produced by refrigeration or electromagnetic induction sometimes causes cracking. It is therefore essentially important to improve mechanical properties of bulk materials to enhance their current carrying capability. In this study, we report on a novel technique to dramatically improve the mechanical properties of the current lead made of bulk superconductors, in which epoxy resin is impregnated into the bulk materials. At 77 K, a large current of 1000 A could be passed along the RE-Ba-Cu-O current lead without the transition from superconducting to normal state. The heat generation was also found to be much smaller than the current lead employed in the present Maglev model, showing that bulk RE-Ba-Cu-O is promising for current lead applications for Maglev.

本文言語English
ページ(範囲)832-836
ページ数5
ジャーナルPhysica C: Superconductivity and its applications
357-360
DOI
出版ステータスPublished - 2001 8月
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • エネルギー工学および電力技術
  • 電子工学および電気工学

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