MgB_(2)超导线材的原位热处理研究  

Study on in-Situ Heat Treatment of MgB_(2)Superconducting Wires

作　　者：陈威东 罗黄健 赵勇 冯勇[4] 王丽丽 CHEN Weidong;LUO Huangjian;ZHAO Yong;FENG Yong;WANG Lili(College of Physics and Energy,Fujian Normal University,Fuzhou 350117,China;Fujian Provincial Collaborative Innovation Center for Advanced High-Field Superconducting Materials and Engineering,Fuzhou 350117,China;Superconductivity and New Energy R&D Center,Southwest Jiaotong University,Chengdu 610031,China;Northwest Institute for Nonferrous Metal Research,Xi'an 710016,China)

机构地区：[1]福建师范大学物理与能源学院,福建福州350117 [2]福建省先进高场超导材料与工程协同创新中心,福建福州350117 [3]西南交通大学超导与新能源研究开发中心,四川成都610031 [4]西北有色金属研究院,陕西西安710016

出　　处：《福建师范大学学报（自然科学版）》2023年第2期80-85,共6页Journal of Fujian Normal University：Natural Science Edition

基　　金：福建省自然科学基金面上资助项目(2020J01132446)。

摘　　要：通过原位SPS热处理和管式炉退火获得SPS-AN MgB_(2)线材样品.XRD结果表明热处理后的各样品中均有MgB_(2)相生成.在SPS热处理阶段,样品出现许多MgB_(2)片状颗粒.由于在SPS阶段样品分解程度不同,退火后样品的形貌出现明显差异.SPS-AN-800℃样品保持了较大的片状形貌,在颗粒边缘有杂相堆积,导致样品的Jc性能最差.SPS-AN-850℃和SPS-AN-880℃样品在退火过程中片状颗粒分解成纳米颗粒,产生了更多的边界钉扎作用.由于SPS-AN-880℃样品分解生成的杂相小颗粒更多,其Jc性能较SPS-AN-850℃样品更好.In this paper,SPS-AN MgB_(2)wire samples were obtained by in-situ SPS heat treatment and tube furnace annealing.XRD results showed that MgB_(2)phase was formed in all the samples after heat treatment.In the SPS treatment stage,many MgB_(2)flake particles appeared in the samples.Due to the different decomposition degree of samples in SPS stage,the morphologies of samples after annealing were significantly different.Large flakes were maintained in the SPS-AN-800℃sample,and there were impurity accumulations at the edge of the particles,resulting in the worst Jcproperties of the sample.The flake particles of SPS-AN-850℃and SPS-AN-880℃samples decomposed into nanoparticles during the annealing process,resulting in more boundary pinning.The Jcproperty of the SPS-AN-880℃sample was better than that of the SPS-AN-850℃sample because there were more small particles generated by decomposition.

关 键 词：二硼化镁 热处理 超导性能 线材 

分 类 号：O511.3[一般工业技术—材料科学与工程]