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Influence of pre-overpressure heat treatment on micro-structure and related properties of Bi-2212 round wire

文献类型：期刊论文

作者Yu, Lei1,2; Zhao, Hang1,2; Xu, Jianyuan1,2; Ding, Hangwei1,3; Chen, Zhiyou1,3; Hao, Qingbin4; Huang, Pengcheng1,3; Chen, Wenge1,3
刊名PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
出版日期2024-07-15
卷号622
关键词Pre-overpressure Heat treatment Bi-2212 Microstructure Properties
ISSN号0921-4534
DOI10.1016/j.physc.2024.1354521
通讯作者Huang, Pengcheng(hpc@hmfl.ac.cn) ; Chen, Wenge(wgchen@ipp.ac.cn)
英文摘要The Bi 2 Sr 2 CaCu 2 O 8 + x (Bi-2212) material, a high -temperature superconductor, holds significant promise for future high -field applications because of its multifilamentary, twistable production capabilities, coupled with a high upper critical field. Bi-2212 round wire (RW) is made by the powder -in -tube (PIT) technique, and Bi-2212 coils are usually being developed using the wind -and -react method and a high temperature and over -pressure (OP) heat treatment (50 atm, 890 degrees C) is then required to achieve the high current performance. However, over -pressure (OP) heat treatment can lead to a reduction in wire diameter, compromising the stability of the coil structure. Addressing this issue, the pre -overpressure (pre -OP) heat treatment is used and proves effective in mitigating the reduction in Bi-2212 wire diameter. In this paper, to comprehensively investigate the impact of pre -OP heat treatment on the microstructure of Bi-2212 wire, a metallographic analysis of two kinds of Bi-2212 wires was carried out by the scanning electron microscope (SEM) and the ImageJ software. It was found that larger -area filaments experienced a greater reduction in area after pre -OP heat treatment, that pre -OP heat treatment increases the aspect ratio of filaments, and polygonal bundle structure helps maintain filament structure stability during pre -OP heat treatment. Additionally, the impact of pre -OP heat treatment on the performance of Bi-2212 wires was analyzed through critical current testing under high fields.
资助项目National Natural Science Foundation of China[2032216] ; Institute of Plasma Physics, Chinese Academy of Sciences (IPPCAS)
WOS研究方向Physics
语种英语
WOS记录号WOS:001249877500001
出版者ELSEVIER
资助机构National Natural Science Foundation of China ; Institute of Plasma Physics, Chinese Academy of Sciences (IPPCAS)
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/136427]  
专题中国科学院合肥物质科学研究院
通讯作者Huang, Pengcheng; Chen, Wenge
作者单位1.Chinese Acad Sci, High Magnet Field Lab, Hefei 230031, Peoples R China
2.Univ Sci & Technol China, Hefei 230026, Peoples R China
3.High Magnet Field Lab Anhui Prov, Hefei 230031, Peoples R China
4.Northwest Inst Nonferrous Met Res, Xian 721013, Peoples R China
推荐引用方式
GB/T 7714		 Yu, Lei,Zhao, Hang,Xu, Jianyuan,et al. Influence of pre-overpressure heat treatment on micro-structure and related properties of Bi-2212 round wire[J]. PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS,2024,622.
APA Yu, Lei.,Zhao, Hang.,Xu, Jianyuan.,Ding, Hangwei.,Chen, Zhiyou.,...&Chen, Wenge.(2024).Influence of pre-overpressure heat treatment on micro-structure and related properties of Bi-2212 round wire.PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS,622.
MLA Yu, Lei,et al."Influence of pre-overpressure heat treatment on micro-structure and related properties of Bi-2212 round wire".PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS 622(2024).

入库方式： OAI收割

来源：合肥物质科学研究院

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