Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Critical Current Properties of Bi-2223/Ag tapes with respect to axial Strain

Bi-2223/Ag 고온초전도 선재의 변형에 따른 임계전류 특성

  • 하홍수 (한국전기연구소 전략기술연구단 초전도응용연구그룹) ;
  • 오상수 (한국전기연구소 전략기술연구단 초전도응용연구그룹) ;
  • 하동우 (한국전기연구소 전략기술연구단 초전도응용연구그룹) ;
  • 심기덕 (한국전기연구소 전략기술연구단 초전도응용연구그룹) ;
  • 김상철 (한국전기연구소 전략기술연구단 초전도응용연구그룹) ;
  • 배성우 (한국전기연구소 전략기술연구단 초전도응용연구그룹) ;
  • 권영길 (한국전기연구소 전략기술연구단 초전도응용연구그룹) ;
  • 류강식 (한국전기연구소 전략기술연구단 초전도응용연구그룹)
  • Published : 2000.07.01
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Abstract

In this study, we fabricated Bi-2223/Ag high temperature superconducting tapes using PIT (Powder-In-Tube) process to apply the superconducting magnet, cable and etc. It's inevitable to deform the superconducting tapes with axial strain for application. Therefore, for the characterization of the strain sensitivity of the superconducting properties, the degradation of Bi-2223/Ag tapes due to axial strain were investigated by measuring the critical current as a function of applied tension strain and external magnetic field. The critical current of Bi-2223/Ag tapes were decreased slightly up to 0.3∼0.4% applied strain but, drastically decreased more than these strains. Superconducting filament cores consisted of brittle ceramic fibers were broken easily by the large strain and current path were decreased simultaneously.

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