东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2004, Vol. 25 ›› Issue (9): 863-865.DOI: -

• 论著 • 上一篇    下一篇

Bi2223/Ag带材超导接头的研究

郭仁春;王金星;宗曦华;何砚发   

  1. 东北大学理学院;东北大学理学院;东北大学理学院;东北大学理学院 辽宁沈阳　110004
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2004-09-15 发布日期:2013-06-25
  • 通讯作者: Guo, R.-C.
  • 作者简介:-
  • 基金资助:
    国家高技术研究发展计划项目(2002AA306121)

Research on joint between Bi2223/Ag superconductor tapes

Guo, Ren-Chun (1); Wang, Jin-Xing (1); Zong, Xi-Hua (1); He, Yan-Fa (1)   

  1. (1) Sch. of Sci., Northeastern Univ., Shenyang 110004, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2004-09-15 Published:2013-06-25
  • Contact: Guo, R.-C.
  • About author:-
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摘要： 采用化学法去除Bi2223/Ag带材末端的银皮,用Bi2223超导粉连接去银皮的带材,制成超导接头·然后把样品放入管式炉中进行热处理·用四引线法对接头样品进行临界电流测试:原始带材的临界电流Ic为40A,热处理后带材Ic为28A,接头处Ic为25A,这些表明已研制出超导接头·通过扫描电镜分析了接头处的断面结构,观察到接头微观结构与带材本身的微观结构有所不同,接头处的临界电流下降·对超导接头的应力、应变的力学性能测试表明,接头处力学性能要比母带材有所下降,延展性比较差·

关键词: Bi2223, 超导接头, 临界电流, 力学性能, 烧结工艺, 焊接

Abstract: A chemical method of making joints between Bi2223/Ag superconductor tapes was developed. At an end, the silver shield was removed from a Bi2223/Ag tape at one side surface, with that at the other side kept. Two of such tapes were contacted each other with Bi2223 powder filled in the gap to form a joint through proper heat-treatment in a tube furnace. The four-probe method was used to measure the current Ic of specimens. The Ic value of original tape is 40 A and it drops to 28 A after heat-treatment, and the Ic value at joint is 25 A after heat-treatment. Such a result shows that a superconducting joint has been developed. The SEM images of the fracture surface of joint show that its microstructure differs to a certain extent from that of the tape itself, so that the critical current drops at the joint. The testing results of the stress/strain of the joint show that the mechanical properties of the joint is somewhat lower than that of the tapes especially its malleability.

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