封装材料对二代高温超导带材稳态过电流能力与拉伸性能影响的实验研究

随着二代高温超导带材从实验室走出，二代高温超导带材进入商业化大规模生产和应用阶段.针对不同的应用场景对热学、电学和力学性能的特殊要求，需要对二代高温超导带材匹配不同的后处理工艺，例如分切、镀铜以及封装等.为了解决现有常用封装材料(紫铜和不锈钢)各自的短板，本文采用铜合金材料封装，详细对比了铜银合金与黄铜与现有常用封装材料在超导带材稳态过电流能力和轴向拉伸性能的差异.发现铜银合金封装的二代高温超导带材的综合性能优于紫铜封装和不锈钢封装的二代高温超导带材.本文的研究也为实际应用中二代高温超导带材的选型提供参考.

Experimental Study of the Effect of Lamination Materials on Steady-state Overcurrent Capability and Tensile Properties of Second-generation High-temperature Superconducting Tape

As the second-generation high-temperature superconducting tape come out of the laboratory, it enters into commercial mass production and application. In order to meet the special requirements of thermal, electrical and mechanical properties for different application scenarios, different post-treatment processes, such as slitting, copper plating and encapsulation, need to be matched to the second-generation high-temperature superconducting tape. In this paper, in order to solve the shortcomings of the existing commonly used lamination materials, copper and stainless steel, copper alloy is used for lamination. And the differences in steady-state overcurrent capability and axial tensile properties between copper-silver alloy and brass and the existing commonly used lamination materials are compared in detail. It was found that the comprehensive performance of the second-generation high-temperature superconducting tape laminated in copper-silver alloy is better than that of the copper and stainless steel. This study also provides a reference for the selection of second-generation high-temperature superconducting tape in practical applications.