MgB_(2)超导线拉伸性能研究  

Study on Tensile Properties of MgB_(2) Superconducting Wires

作　　者：何宇翔 高鹏 秦经刚 HE Yuxiang;GAO Peng;QIN Jinggang(Institute of Plasma Physics and Hefei Institutes of Physical Science Chinese Academy of Sciences,Hefei 230031,China;the Science Island Branch,Graduate School of University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]中国科学院合肥物质科学研究院等离子体物理研究所,合肥230031 [2]中国科学技术大学研究生院科学岛分院,合肥230026

出　　处：《低温物理学报》2022年第3期197-203,共7页Low Temperature Physical Letters

摘　　要：MgB_(2)是一种新型超导材料,它具有较高的临界温度和较低的原料价格.随着磁约束核聚变实验技术的发展,未来的托卡马克磁体系统的低场部分磁体有希望使用MgB_(2) CICC导体绕制.CICC导体的有限元分析需要以超导线的应力-应变函数为基础.本文中,来自西部超导公司(WST)及Hyper Tech公司的两种MgB_(2)超导线被测试了抗拉强度与弹性模量.未反应的超导线在室温下的拉伸曲线被用多项式及指数函数拟合.实验发现西部超导公司的MgB2线材在各种条件下的拉升强度都高于Hyper Tech线材.室温下未反应的MgB_(2)超导线的应力-应变关系可以用指数函数恰当地拟合,并且表达式比多项式函数的拟合结果更简单.超导线的应力-应变函数可以为CICC导体数学模型的建立提供参考.MgB_(2) is a new superconducting material with higher critical temperature and lower raw material price.With the development of magnetic confinement fusion experiments,future low-field partial magnets of tokamak are expected to be wound with MgB_(2) CICCs.The finite element analysis of CICC conductors is based on the stress-strain function of superconducting wires.In this study,two types of MgB2 superconducting wires from Western Superconducting Technologies Co.,Ltd.(WST)and Hyper Tech Research,Inc.(Hyper Tech)were tested for tensile strength and elastic modulus.The room temperature tensile curves of unreacted superconducting wires were fitted with polynomial and exponential functions.Experiments show that the tensile strength of WST MgB_(2) wire is higher than that of Hyper Tech wire under various conditions.The stress-strain relationship of unreacted MgB_(2) superconducting wire at room temperature can be properly fitted by exponential function,and the expression is simpler than the fitting result of polynomial function.The stress-strain function of superconducting wires can provide reference for the mathematical model of CICC conductors.

关 键 词：MgB_(2) 超导线 力学性能 

分 类 号：O511.3[一般工业技术—材料科学与工程] TL631.24[理学—低温物理]