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

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 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.

References

  1. 2000년 한국전기전자재료학회 초전도/자성체 전문연구회 춘계학술대회 논문집 v.1 PIT법에 의한 은시스 Bi-2223 고온초전도 장척선재 개발 오상수;하홍수
  2. 2000년 한국전기전자재료학회 초전도/자성체 전문연구회 춘계학술대회 논문집 v.1 가공공정에 따른 Bi-2223 고온초전도 선재의 임계전류 및 자장특성 하홍수;오상수;하동우;김상철;이남진;장현만;권영길;류강식
  3. 전기전자재료학회논문지 v.13 no.3 Twisting된 Bi-2223 선재의 제조, 미세조직 관찰 및 임계 특성 평가 임준형;지봉기;박형상;주진호;장미혜;고태국;이상진;하홍수;오상수
  4. Cryogenics v.36 Tencile strain/transverse compresive stress dependence of critical current in Ag-sheathed Bi(2212) 7-core superconducting wires K. Katagiri;H. S. Shin;Y. Shoji;N. Ebisawa;K. Watanabe;K. Noto;T. Okada;M. Hiraoka;S. Yuya
  5. Supercon. Sci. Tech. v.11 Strain tolerance of Ag-sheathed BSCCO(2223) superconductors with various geometrical configurations N. Vasanthamohan;J. P. Singh;K. A. Lubke
  6. IEEE Trans. Mag. v.32 no.4 Descriptive model for the critical current as a function of axial strain in Bi-2212/Ag wires B. ten Haken;A. Godeke;H. J. Schuver;H. J. ten Kate
  7. IEEE Trans. App. Supercon. v.5 no.2 The influence of compresive and tensile axial strain on the critical properties of Nb3Sn conductors B. ten Haken;A. Godeke;H. J. ten Kate
  8. Supercon. Sci. Tech. v.12 Tencile properties and probability of filament fracture in Bi-2223 superconducting tapes M. Rabara;N. Sekimura;H. Kitaguchi;P. Kovac;K. Demachi;K. Miya