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首页> 外文期刊>Physica, C. Superconductivity and its applications >Critical current of laminated and non-laminated BSCCO superconducting composite tape under bending strain
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Critical current of laminated and non-laminated BSCCO superconducting composite tape under bending strain

机译：弯曲应变下层压和非层压BSCCO超导复合带的临界电流

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摘要

It has been reported that, when the (Bi,Pb)(2)Sr2Ca2Cu3Ox (hereafter noted as BSCCO)/Ag/Ag-alloy tape is laminated with stainless steel, the tensile strain tolerance of critical current is much improved. in this study, using the non-laminated and laminated BSCCO composite tapes fabricated at American Superconductor Corporation, the influences of lamination on the critical current and its distribution under bending strain were studied. The analysis of the measured variation of average critical current with bending strain based on the damage evolution model revealed that the laminated stainless steel acts to suppress the fracture of the BSCCO filaments. The experimentally observed high critical current retention of the laminated tape up to high bending strain was accounted for by the suppression of fracture of BSCCO filaments stated above and enhancement of the compressive residual strain in the filaments. The distributions of local critical current in non-laminated and laminated composite tape were described well by the three-parameter Weibull distribution function within the bending strain lower than 1.1%. The coefficient of variation of distribution of critical current of the laminated tape was similar to that of the non-laminated one under the same strain distribution in the core.
机译：据报道，当将（Bi，Pb）（2）Sr2Ca2Cu3Ox（以下称为BSCCO）/ Ag / Ag合金带与不锈钢层压在一起时，临界电流的拉伸应变耐受性大大提高。在这项研究中，使用美国超导体公司制造的非层压和层压BSCCO复合胶带，研究了层压对临界电流及其在弯曲应变下的分布的影响。基于损伤演化模型对测量的平均临界电流随弯曲应变的变化的分析表明，层压不锈钢起到抑制BSCCO细丝断裂的作用。实验中观察到的层压带的高临界电流保持率直至高弯曲应变是由于抑制了上述BSCCO细丝的断裂并增强了细丝中的压缩残余应变而造成的。通过三参数Weibull分布函数在低于1.1％的弯曲应变范围内很好地描述了非层压和层压复合带中的局部临界电流分布。在铁芯相同的应变分布下，叠层带的临界电流的分布系数与非叠层带的临界电流的分布系数相似。

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