Ag/Bi2223酸化物超電導線の臨界電流の引張応力依存性

概要

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Studies have been mode on dependency of critical current on tensile stress of a silver-sheathed (Bi,Pb)_2Sr_2Ca_2Cu_3O_x (Bi-2223) tape which is typical high temperature superconductor. In stress-strain charactreisitcs, tensile strength in liquid nitorogen temperature (77K) is about 1.5 times larger than that in room temperature. Critical current does not decrease under tensile stress from 0 through 130 Mpa(129N), then gradually decreases and break of tape occures at 140 Mpa (132N). These results are considered as follows. Under tensile stress 0 through 130 Mpa superconducting filaments deform elastically, but beyond this stress range, filaments gradually break at mechanically weaker points. Then critical current decreases gradually.
福井工業大学の論文
2005-03-18