• CN：11-2187/TH
  • ISSN：0577-6686
机械工程学报

›› 1998, Vol. 34 ›› Issue (1): 48-52.

• 论文 • 上一篇    下一篇

Bi-2223/Ag超导带材的热压工艺及其变形机理研究

马衍伟;王先进;王祖唐   

  1. 北京科技大学压加系;清华大学
  • 发布日期:1998-01-01

HOT PRESSING AND ITS DEFORMATION MECHANISM STUDY OF Bi-2223/Ag SUPERCONDUCTING TAPES

Ma Yanwei;Wang Xianjin;Wang Zutang   

  1. University of Science and Technology Beijing Qinghua University
  • Published:1998-01-01

摘要： 开发了制备Bi系高温超导带材的热压新工艺并研究了其变形机理。研究表明：合理的工艺参数为750℃/200 Mpa/30 min。Bi-2223带材经热压处理后能有效地提高粉芯的密度，可在较小的压力下获得较大的变形率，并且晶粒破碎程度较轻。带材经热压处理后的临界电流密度J c在77K和零场下最高达225MA/m{sup}2。

关键词: 变形机理, 超导带材, 临界电流密度, 热压

Abstract: Experiments of hot pressing of the tapes are carried out. Parameters of pressure, temperature and time were determined. High Jc is achieved at the condition of 750℃/200 Mpa/30 min. It is found that hot pressing caused the core to be more dense, better texture and could avert the formation of cracks effectively. At 77 K and zero field, the maximum Jc value is up to 225 MA/m2.

Key words: Critical current density, Deformation mechanism, Hot pressing, Superconducting tapes

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