王庆阳,张可荣,熊晓梅,杨芳,郗丹,王大友,李成山,闫果,冯勇,张平祥.原位粉末装管法37芯MgB2线材的制备及性能研究[J].稀有金属材料与工程,2020,49(8):2825~2829.[WANG Qingyang,ZHANG Kerong,XIONG Xiaomei,YANG Fang,XI Dan,WANG Dayou,LI Chengshan,YAN Guo,FENG Yong,ZHANG Pingxiang.Fabrication and properties of 37-filaments MgB2 superconducting wires by in-situ powder-in-tube method[J].Rare Metal Materials and Engineering,2020,49(8):2825~2829.]
原位粉末装管法37芯MgB2线材的制备及性能研究
投稿时间:2019-07-27  修订日期:2019-10-17
中文关键词:  二硼化镁  多芯线材  机械性能  超导性能
基金项目:国家自然科学基金(51772250),陕西省自然科学基金(2017ZDJC-19)和西安市未央区科技计划项目(201818)
中文摘要:
      传统的Cu包套原位粉末装管法(in situ PIT)制备多芯MgB2超导线材时,易于出现断芯、断线现象。针对一问题,本实验中以强度较高的梦乃尔合金(Monel 400)作为包套材料,以旋锻、拉拔、轧制及中间热处理相结合的加工手段成功的制备出直径Φ1.0 mm、37芯结构的多芯MgB2超导长线材。微观结构分析表明多芯线材中MgB2芯丝及替换芯丝等亚组元的分布较为规整,阻隔层未出现明显破损现象,最终线材中MgB2超导芯丝的平均直径约80 μm。室温拉伸性能显示热处理前MgB2线材的屈服强度为759 MPa,热处理后的线材为248 MPa。4.2 K、4 T下,线材的临界电流密度Jc达到2.31×105 A.cm-2,工程临界电流密度达到3.16×104 A.cm-2
Fabrication and properties of 37-filaments MgB2 superconducting wires by in-situ powder-in-tube method
英文关键词:MgB2 wire, multi filament, mechanical properties, supercongducting
英文摘要:
      The filament fractures or wire breaks in multi core MgB2 wire was appeared frequent while using the traditional in-situ powder in tube (PIT) method with Cu as the sheath material. For this problem, the 37 filament MgB2 long wires with the diameter of 1 mm, sheathed with higher strength Monel alloys (Monel 400) is fabricated with compound fabrication process including rotary swage, drawing, rolling and middle annealing heat treatment。Microstracture showed that the sub component including MgB2 filament and NbCu replacement is uniformly distributed and the Nb diffusion barrier is no breaking points. The mean diameter in MgB2 filament is only 80 μm in final wires. The yield strength is around 759 MPa. for the as-drawn wire and 248 MPa for the sintered wire. The critical current density (Jc) and engineering current density (Je) are arrived 2.31×105 A.cm-2 and 3.16×104A.cm-2 at 4.2 K、4 T respectively.
作者单位E-mail
王庆阳 西北有色金属研究院 wqy233@sina.com 
张可荣 西藏民族大学信息工程学院  
熊晓梅 西北有色金属研究院  
杨芳 西北有色金属研究院  
郗丹 西部超导材料科技股份有限公司  
王大友 西部超导材料科技股份有限公司  
李成山 西北有色金属研究院  
闫果 西部超导材料科技股份有限公司  
冯勇 西部超导材料科技股份有限公司  
张平祥 西北有色金属研究院  
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