芯部引入Ag合金的方法改善Bi2223超导带材的机械性能  

IMPROVEMENT OF MECHANICAL PROPERTIES OF BI2223 TAPES BY INSERTING Ag-ALLOY WIRE IN SUPERCONDUCTING CORE

作　　者：姜冰[1] 张平祥[2] 周廉[2] 李成山[2] 何砚发[1] 

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

出　　处：《低温物理学报》2003年第4期262-266,共5页Low Temperature Physical Letters

摘　　要：本文利用在超导芯部引入Ag合金的方法制备了一种新结构Bi2 2 2 3超导带材 ,并研究了此种带材相对于普通Bi2 2 2 3超导带材性能的变化 ,以及拉伸应变对其性能的影响 .实验结果表明 ,这种新结构提高了带材的载流性能 ,所得最终带材的最大Ic=75A ,Jc=1 .6×1 0 4 A/cm2 ,相对普通样品提高了 35 % .实验结果表明此种Bi 2 2 2 3超导带材的机械性能有明显的提高 ,样品的屈服强度σ0 .2 和不可逆应变极限εirr和普通样品相比均有较大幅度的提高 ,最大不可逆应变极限εirr约为 0 .4 5 % ,相对普通样品提高了约 5 0 %左右 ,屈服强度σ0 .2 约为 85Mpa ,相对普通样品提高了约 30This article introduced a newly structured Bi2223 tape prepared by inserting Ag alloy wire in superconducting core. We discuss the changes in properties of such prepared tape compared to that of conventional Bi2223 tapes and effects of tensile strain on its properties. Experiments indicate that by adoption of this new structure the properties are considerably improved with their I-c and J-c reaching up to 75A, 1.6×10+4A/cm+2 respectively, which constitutes a 35% increase compared to those of conventional tapes. Results of experiments have revealed some remarkable improvements in the mechanical properties of tape Bi2223 under such preparation. The σ -{0.2} of approximately 85Mpa and ε -{irr} of approximately 0.45%, increase about 30% and 50% respectively compared to those of the Bi2223 tape prepared by conventional process.

关 键 词：Bi2223超导带材 机械性能 银合金 拉伸应变 机械强度 超导芯部 超导材料 Ag合金 

分 类 号：TM26[一般工业技术—材料科学与工程] TG113.25[电气工程—电工理论与新技术]