YBCO涂层导体焊接接头电流分布研究  

The current distribution tests in soldered lap joint of the YBCO coated conductors

作　　者：刘勇[1,2] 张兴义[1,2] 刘伟[1,2] 周军[1,2] 周又和[1,2] 

机构地区：[1]兰州大学土木工程与力学学院,兰州730000 [2]西部灾害与环境力学教育部重点实验室,兰州730000

出　　处：《低温与超导》2015年第11期30-34,共5页Cryogenics and Superconductivity

基　　金：国家自然科学基金委面上项目(11202089);国家磁约束核聚变能源发展计划ITER专项(2013GB110001);全国优博专项基金(201135)资助

摘　　要：目前,由于制作工艺的限制,可生产的YBCO涂层导体(2G)的最大长度低于1km,而其在工程应用中需要的长度远远大于可生产长度,因此,针对超导接头技术开展相关研究具有重要的意义。提出了一种测试YBCO涂层导体焊接接头电流分布的试验方法。利用这种方法,分别对3cm,5cm,6cm,8cm,10cm 5种不同长度接头电流和电阻分布进行了测试,并用一个理论模型与实验结果进行了比较。结果显示:接头上下两层带材之间的电流流动大部分是在端点附近完成的;另外,接头电阻是由上下两层带材之间的电流流动引起的,并且主要是由端点处的电流流动决定的。We found a technique for the measurement of the current distribution in soldered lap joint of the YBa2Cu3O7-x Coated Conductor （YBCO CC） at liquid nitrogen temperature for the first time, and we did these tests in five different samples with the length of overlap of 3,4,6,8 and 10 cm, respectively. We also put forward a theoretical model and compared it with the experiment results. The results show that, The current flow between the two layers of the soldered lap joints is mostly finished near the endpoints. In addition,the resistances of these joints are caused by the current flow in the soldered lap joints ,and it is mainly determined by the current flow in the endpoint of the joint. It has very important value in the production and improvement of the joint.

关 键 词：YBCO涂层导体 超导接头 电流分布 

分 类 号：TM26[一般工业技术—材料科学与工程]