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高温超导带材具有高的临界电流密度,高磁场下优异的载流特性以及良好的成型性在强电领域如高场磁体、超导电缆等方面应用潜力巨大。在其应用过程中,不可避免的低温-大电流-强磁场环境将对超导材料的载流能力产生影响,而加工过程中的残余应力以及洛伦兹力的存在会显著的降低超导材料的临界电流,造成相应超导装置功能性难以达到设计要求、且成为重要的安全隐患。本文介绍一种新型的适用于超导带材的力-磁-电多场耦合测试系统,该系统目前采用浸泡式制冷,可实现的主要功能有:(1)超导材料临界电流密度测试;(2)拉伸应变对超导带材临界电流的影响研究;(3)磁场对超导带材临界电流的影响研究;(4)力磁耦合情形下超导材料临界电流的变化规律;(5)超导材料磁通稳定性测试。该设备的成功研制将为我国先进超导材料研发提供基础测试平台。
High-temperature superconducting tapes have high critical current density, excellent current-carrying characteristics in high magnetic fields, and good formability. They have great potential for applications in high-power fields such as high-field magnets and superconducting cables. In its application, inevitable low temperature - high current - strong magnetic field environment will have a current carrying capacity of superconducting materials, and the processing of residual stress and Lorentz force will significantly reduce the superconducting material Of the critical current, resulting in the corresponding superconducting device functionality difficult to meet the design requirements, and become an important security risk. In this paper, a new force-magneto-electric multi-field coupled test system for superconducting tapes is introduced. Currently, the system uses immersion refrigeration. The main functions that can be achieved are: (1) critical current density test of superconducting materials; (2) the study of the effect of tensile strain on the critical current of superconducting tape; (3) the influence of magnetic field on the critical current of superconducting tape; (4) the variation of critical current of superconducting material under magnetic force coupling; ( 5) Superconducting material flux stability test. The successful development of this equipment will provide the basic test platform for R & D of advanced superconducting materials in China.