MgB_2超导线材失超传播速度与最小触发能的影响因素研究  

RESEARCH ABOUT INFLUENCE ELEMENT OF QUEENCH PROPAGATION VELOCITY AND MINIMUM QUENCH ENERGY OF MgB2 SUPERCONDUCTING WIRES

作　　者：李成山[1] 杨芳[1] 王庆阳[1] 熊晓梅[1] 陈思华[2] 白质明[2] 刘国庆[1] 冯建情[1] 闫果[1] 冯勇[1] 

机构地区：[1]西北有色金属研究院,西安710016 [2]东北大学,沈阳110004

出　　处：《低温物理学报》2014年第1期60-64,共5页Low Temperature Physical Letters

基　　金：国家"973"计划(批准号:2011CBA00104)资助的课题~~

摘　　要：通过有限元方法(FEM)计算系统的一维热传导方程来研究MgB2超导线材的失超行为,由数值计算得到的MgB2超导线材失超传播规律与实验测得值相吻合.在实验上和理论上分析了铜超比、热导率、热容、电阻率等参数对MgB2超导线材失超行为的影响.通过数值计算给出了失超传播速度和最小触发能随工作温度、热导率、热容、铜超比的变化规律.Finite element method （FEM） is used to solve the one-dimensional heat balance equation of the system to study the quench process numerically of MgB2 superconducting wires. The simulation results are in qualitative a- greement with experimental ones. We analyze quench process of MgB2 wires with different volumetric ratio of cop- per to MgB2, thermal conductivity, specific heat and resistivity from experiment and theory of stability. We also calculate the quench propagation velocity and minimum quench energy as function of working temperature, thermal conductivity, specific heat and volumetric ratio of copper to MgB2.

关 键 词：MgB2超导线材 最小触发能 失超传播速度 有限元方法 

分 类 号：TM26[一般工业技术—材料科学与工程]