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热处理工艺对先位法 MgB2 带材临界电流密度性能的影响
郗丹,潘熙锋,王大友,王庆阳,熊晓梅,杨芳,崔利军,陈传,闫果
0
(西部超导材料科技股份有限公司超导材料制备国家工程实验室;西北有色金属研究院;西部超导材料科技股份有限公司超导材料制备国家工程实验室、西北有色金属研究院)
摘要:
本文采用先位粉末装管法(ex-situ PIT) 制备了12芯 Ni 基 MgB2 超导带材, 并研究了三种不同的热处理工艺对带材可加工性能、 MgB2-Ni 反应层相成分、 芯丝微观结构及输运临界电流性能的影响. 研究表明:通过采用适当的热处理和加工工艺, 可以有效改善超导带材的可加工性能, 调控 MgB2 芯丝与 Ni 基体的反应层厚度, 从而获得各组元变形均匀、 晶体连接性优良的带材.采用最佳的工艺获得的带材在4.2K、2T 下临界电流(Ic ) 达到212A, 临界电流密度为(J c ) 为8.8×A·cm-2.
关键词:  MgB2带材, 先位粉末装管法, 热处理, 加工硬化
DOI:
基金项目:
Influenceof Heat Treatments Techniqueon Critical Current Density Properties ofexGsitu MgB2Tapes
XI Dan,PAN Xifeng,WANG Dayou,WANG Qingyang,XIONG Xiaomei,YANG Fang,CUI Lijun,CHEN Chuan,YAN Guo
(Nationalengineeringlaboratoryforsuperconducting materials , Western Superconducting Technologies Co.Ltd;Northwest Institutefor Nonferrous Metal Research)
Abstract:
We have prepared 12 filaments MgB2 tapes through an ex-situ PIT process with three kinds of heat treatment technique.To study the effect of heat treatment technique, microstructures, MgB2-Ni reaction layers and transport properties of tapes were investigated. It demonstrates that the MgB2 tape with property heat treatment technique and deformation process could own the best deformation property. As the result, this tape has the perfect microstructure, connectivity, and priority transport property: Ic values reached about 212 A and J c values reached abou 8.8×104 A? cm-2 at 4.2 K and 2 T
Key words:  MgB2tape, ex-situ PIT method, heattreatment, work hardening

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