MgB_2/Nb/Cu多芯线材的力学性能研究  

Mechanical properties of multi-filamentary MgB_2/Nb /Cu wires

作　　者：李成山[1,2] 闫果[1,3] 王庆阳[1] 杨芳[1] 熊晓梅[1] 刘国庆[1] 焦高峰[1] 庞玉春[2] 冯建情[1] 冯勇[1,3] 张平祥[1,3] 

机构地区：[1]西北有色金属研究院,西安710016 [2]宝胜集团有限公司,扬州225800 [3]西部超导材料科技股份有限公司,西安710018

出　　处：《低温与超导》2014年第6期1-5,共5页Cryogenics and Superconductivity

基　　金：国家"973"计划(2011CBA00104);国家自然科学基金(51372207;51302226)

摘　　要：实验中对采用原位法粉末装管工艺(in-situ PIT)制备的Nb芯增强,6芯、12芯和36芯等多种导体结构的Nb/Cu复合包套MgB2多芯超导线材的力学性能进行了针对性地研究;设计并加工了一套专门用于低温下MgB2线带材弯曲应力测试的样品架;研究了MgB2线带材的临界电流随弯曲应力的变化性能;同时研究了室温及低温条件下的拉伸对MgB2线材超导电性的影响。力学性能分析表明,所制备的Nb芯增强6芯MgB2超导线材在弯曲直径为80mm以上时,超导临界传输电流没有出现明显的退降,同时该线材的拉伸力学性能也比未增强线材有明显的改善。The mechanical properties of Nb reinforced, 6,12, and 36 filamentary MgB2 wires which sheathed with Nb/Cu compound tube and fabricated by in - situ powder - in - tube （ in - situ PIT） method were researched in this paper. A sample holder for testing the bending strain of MgB2 wires and tapes and lower temperature was design and fabricated. The variety of critical current density Jc changed with bending stress of MgB2 wires was investigated. The effect of drawing process on superconducting properties of MgB2 wires at room temperature or lower temperature was analyzed. The bending mechanical and suporcondueting properties show that the transport Jc has no visible degradation while the bending diameter is more than 80mm on the Nb reinforced, 6 - filamentary MgB2 wires. The drawing mechanical properties have obvious enhancement than that of the wire without reinforced.

关 键 词：二硼化镁 多芯线材 Nb芯增强 力学性能 

分 类 号：TM26[一般工业技术—材料科学与工程]