Bi—2223带材在拉伸应力下的临界电流

研究了不锈钢加强的Bi-2223/Ag高温超导带材在不同的拉伸应力下临界电流的变化情况。采用改造后的拉伸设备,在温度77K下对超导带材施加拉伸应力的同时,利用四引线法测量带材的临界电流,得到了超导带材的应力—应变曲线以及临界电流—应变曲线。利用理论公式计算了应力对超导带材临界电流的影响,与实验结果进行对比,并对两者的差别进行了分析。

The effect of tensile stress on the critical current in the Bi-2223/Ag tapes

In this paper,the critical current was measured for Bi—2223/Ag high temperature superconductor (HTS) tapes under different tensile stress.A reformed tensile device was used to apply tensile stress on the tapes and the critical current was measured by the four—contact method.The stress—strain characteristic and the strain dependence of the critical currents were studied of the HTS tapes.A comparison is given for the measured results and the values calculated from the formulae developed from the critical current—strain relationship.