窄丝化工艺对第二代高温超导带材临界电流特性的影响

超导带材应用于超导电力设备时,其临界电流特性受外界交变磁场大小和方向的影响,展现出明显的各向异性.为了减小外场对超导带材的影响,本文通过窄丝化工艺将4 mm宽的高温超导带材分切成2 mm宽的高温超导细丝.本文通过冷热循环疲劳测试实验和带材显微观察两个角度相互验证,对2 mm超导细丝临界电流性能做了具体评估.创新性地提出...

Influence of Narrowing Process on Performance Damage Characteristicsof2G HTS Tapes

When applied in superconducting power equipment, the critical current characteristics of high temperature superconducting (HTS) tapes were affected by the size and direction of the external alternating magnetic field, showing obvious anisotropy. To reduce the influence under external field, narrow HTS tapes with 2mm width were manufactured by narrowing process. In this paper, the influence of different processes on the characteristics of the HTS narrow tapes was verified by the thermal cycle fatigue experiments and the microscopic observation experiments. This paper innovatively proposed the introduction of copper electroplating process to improve the critical current characteristics of superconducting tapes. Meanwhile, experiments and microscopic observations proved that the copper electroplating process could generate a copper layer on the surface of superconducting tapes, thereby effectively reducing the attenuation of the critical current. This paper also provided fundamental reference for the subsequent application of HTS narrow tapes in composite structures.