日本金属学会誌

J. Japan Inst. Metals, Vol. 71, No. 11 (2007),
pp. 977-984

Estimation of Critical Current of Bent Bi2223 Composite Tape by Application of Superconducting Core Shape-Incorporated Model

Shojiro Ochiai1, Jaekyoung Shin1, Hiroshi Okuda1, Sang Soo Oh2 and Dong-Woo Ha2

1International Innovation Center, Kyoto University, Kyoto 606-8501
2Korea Electrotechnology Research Institute, Changwon Kyongnam 641-120, Korea

Abstract:

The bending strain-dependence of critical current of Bi2223/Ag/Ag-Mg alloy superconducting composite tape was studied experimentally and analytically. The measured change of critical current with bending strain was described well by the superconducting core shape-incorporated model. The distribution of damage-inducing parameter (difference between the tensile fracture strain and thermally induced residual one) in the samples was described well by the Weibull distribution. By application of this result, the distributions of irreversible bending strain and critical current at various bending strain were discussed.


(Received 2007/4/18)

Keywords:

superconducting tape, Bi2223, bending behavior, critical current, damage parameter, modeling


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