王庆阳,闫果,郗丹,杨芳,潘熙锋,熊晓梅,冯建情,李成山,刘向宏,张平祥.多芯MgB2超导线材的挤压制备技术及微观结构研究[J].稀有金属材料与工程,2019,48(4):1293~1297.[WANG Qingyang,YAN Guo,XI Dan,YANG Fang,PAN Xifeng,Xiongbn Xiaomei,Feng Jianqing,LI Chengshan,LIU Xianghong,ZHANG Pingxiang.Extrusion procedure and microstructure properties of multi-filamentary MgB2 superconducting wires[J].Rare Metal Materials and Engineering,2019,48(4):1293~1297.]
多芯MgB2超导线材的挤压制备技术及微观结构研究
投稿时间:2017-08-26  修订日期:2017-11-13
中文关键词:  二硼化镁  多芯线材  挤压工艺  微观结构
基金项目:国家自然科学基金(51772250,51372207);陕西省自然科学基金(2014JM2-5060,2017ZDJC-19);国家重点研发计划(2017YFB0902303)
中文摘要:
      为了提高多芯MgB2超导线材中芯丝相互之间的结合强度和超导芯丝的致密度,将传统的热挤压技术引入到MgB2线材制备过程中。采用挤压工艺制备180芯导体结构的多芯MgB2/Nb/Cu超导线材,Φ64mm的复合包套通过单道次挤压工艺加工到Φ20 mm。挤压后的线材通过冷拉拔和中间退火热处理最终加工到Φ0.81 mm。对加工不同阶段的复合线材进行了微观结构分析,发现多芯线材中MgB2超导芯丝分布良好,Nb阻隔层厚度分布较为均匀,无破损现象。通过该工艺已成功制备出百米量级长度的多芯MgB2超导线材。该技术为MgB2超导长线的制备提供了新途径。
Extrusion procedure and microstructure properties of multi-filamentary MgB2 superconducting wires
英文关键词:MgB2 wires, multi-filamentary, extrusion, microstructure
英文摘要:
      For improving the combine strength among filamentaries and the density of superconducting cores in multi filamentary MgB2 wire, the traditional hot-extrusion method was introduced to the MgB2 wires fabrication process. MgB2 wire with the conducting structure of 180 cores was fabricated by the extrusion method. Compound billet is extruded from Φ64 mm to Φ20 mm in diameter with one pass extrusion. The extruded wire is fabricated to the final size Φ0.8 mm in diameter with cold drawing and mid-annealing process. Superconducting filamentary is uniformly distributed and the thickness of Nb diffusion barrier is also smooth without breaking points through the microstructure analysisof the wires at each fabrication stages. The hectometer MgB2 wires is fabricated successful by this method. The extrusion technique is promising for producing long MgB2 superconducting wires.
作者单位E-mail
王庆阳 西北有色金属研究院超导材料研究所 wqy233@sina.com 
闫果 西部超导材料科技股份有限公司 gyan@c-nin.com 
郗丹 西部超导材料科技股份有限公司  
杨芳 西北有色金属研究院超导材料研究所  
潘熙锋 西部超导材料科技股份有限公司  
熊晓梅 西北有色金属研究院超导材料研究所  
冯建情 西北有色金属研究院超导材料研究所  
李成山 西北有色金属研究院超导材料研究所  
刘向宏 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
西部超导材料科技股份有限公司 
 
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