Critical Current Properties of Bi-2223/Ag tapes with respect to axial Strain

Bi-2223/Ag 고온 초전도 선재 변형에 따른 입계전류 특성

  • 하홍수 (한국전기연구소 전략기술연구단 초전도응용연구그룹) ;
  • 오상수 (한국전기연구소 전략기술연구단 초전도응용연구그룹) ;
  • 하동우 (한국전기연구소 전략기술연구단 초전도응용연구그룹) ;
  • 심기덕 (한국전기연구소 전략기술연구단 초전도응용연구그룹) ;
  • 김상철 (한국전기연구소 전략기술연구단 초전도응용연구그룹) ;
  • 장현만 (한국전기연구소 전략기술연구단 초전도응용연구그룹) ;
  • 권영길 (한국전기연구소 전략기술연구단 초전도응용연구그룹) ;
  • 류강식 (한국전기연구소 전략기술연구단 초전도응용연구그룹)
  • Published : 2001.01.01


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 is inevitable to deform the superconducting taps 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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