Proceedings of the Korea Institute of Applied Superconductivity and Cryogenics Conference (한국초전도저온공학회:학술대회논문집)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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The effect of twisting on microstructure and AC losses of Bi-2223 superconductor tapes

Twisting된 Bi-2223 선재의 미세조직 관찰 및 교류손실 특성평가

  • 장석헌 (성균관대학교 금속재료공학부) ;
  • 임준형 (성균관대학교 금속재료공학부) ;
  • 김정호 (성균관대학교 금속재료공학부) ;
  • 김규태 (성균관대학교 금속재료공학부) ;
  • 주진호 (성균관대학교 금속재료공학부) ;
  • 나완수 (성균관대학교 정보통신공학부) ;
  • 정재훈 (전남대학교 전기공학과) ;
  • 류경우 (전남대학교 전기공학과)
  • Published : 2003.02.01
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Abstract

The effect of twisting on the microstructure and AC losses of Bi-2223 superconductor tape has been evaluated. Twisting pitches of the tapes are in the range of 12~60 mm and uniformly deformed. The critical current of the tapes was measured to decreased with decreased pitch. This reduction is believed to be due to the irregular interface, poor grain alignment. In addition, AC losses of the tape reduced as the pitch decreased probably due to combined effects of lower critical current and electrically decoupled filament of twisted tape.

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