铌钛超导体的非合金化制备  

NbTi SUPERCONDUCTOR PRODUCED BY USING INTERDIFFUSION BETWEEN NIOBIUM AND TITANIUM SHEETS

作　　者：陈自力[1] 谢宝海[2] 焦高峰[1] 杜社军[1] 吴晓祖[1] 刘向宏 张平祥[1] 周廉[1] 

机构地区：[1]西北有色金属研究院,陕西西安710016 [2]东北大学,辽宁沈阳110004 [3]西部超导材料科技有限公司,陕西西安710016

出　　处：《低温物理学报》2005年第A02期791-795,共5页Low Temperature Physical Letters

基　　金：国家高技术研究发展计划(2002AA306231)资助~~

摘　　要：本文研究了Nb片和Ti片在不同温度下的扩散行为,并利用Nb片和Ti片交替组配加工,经过扩散反应制备出了NbTi超导线.运用扫描电镜(SEM)观察了Nb/Ti界面的扩散形态及微结构,并对热处理工艺的合理选择进行了讨论.结果表明:经800℃,5小时扩散可得到厚度最大,Ti含量最高的NbTi超导相.该工艺制备出的NbTi超导线材的临界电流密度Jc可达到2800A/mm2(5T、4.2K)和4200A/mm2(3T、4.2K),与传统工艺制备出的超导体的性能相当.The diffusion behaviors under different temperatures between Nb sheet and Ti sheet were investigated in this paper . The NbTi superconducting wires were prepared through the diffusion reaction by using alternative Nb and Ti sheets. The diffusion behavior of Nb/Ti interface and microstructure were observed by scanning electron microscopy （SEM） and the suitable process of heat treatment was also discussed. The results indicate that the NbTi superconducting phase with the largest thickness and highest Ti content can be obtained by the diffusion reaction between Nb and Ti sheets at 800℃ for 5h. The Jc values of NbTi wires fabricated by this method reach 2800A/mm^2 in 5T and 4200 A/mm^2 in 3T at 4.2K, which is similar to those of NbTi wires prepared by the conventional process.

关 键 词：NBTI超导体 临界电流密度 热处理 扩散反应 

分 类 号：O511.3[一般工业技术—材料科学与工程]