Effect of high-temperature vacuum degassing on microstructure and current-carrying capacity of the Bi-2212 wire
作者: Q.B. HaoC.S. LiG.Q. LiuX.Y. XuG.F. JiaoH.L. ZhengS.N. ZhangL.F. Bai
作者单位: 1School of Materials Science and Engineering, Northeastern University, Shenyang, 110006, People's Republic of China
2Superconducting Materials Research Center, Northwest Institute for Nonferrous Metal Research, Xi'an, 710016, People's Republic of China
刊名: Journal of Alloys and Compounds, 2018, Vol.742 , pp.897-902
来源数据库: Elsevier Journal
DOI: 10.1016/j.jallcom.2018.01.375
关键词: Bi-2212 wireVoidsVacuum degassingCritical current density
英文摘要: Abstract(#br)The voids in Bi 2 Sr 2 CaCu 2 O x (Bi-2212) long-length wire should be eliminated as far as possible in order to improve its current-carrying capacity. There are several reasons for the void formation in Bi-2212 wire, mainly including the gas adsorbed on powder and existed in the gaps among the powder particles. We have found that the high-temperature vacuum degassing, which can eliminate the gases in wire and suppress the void formation, is an effective method to manufacture the Bi-2212 long wire with high-performance. Moreover, the high-temperature vacuum degassing is beneficial for the arrangement of Bi-2212 grains and the improvement of the texture of filaments. The engineering critical current density (Je) of Bi-2212 wire made by this method reaches to 440 A/mm 2 at 4.2...
全文获取路径: Elsevier  (合作)
影响因子:2.39 (2012)

  • vacuum 真空
  • microstructure 微结构
  • temperature 温度
  • capacity 电容量
  • degassing 除气
  • current 
  • carrying 垫纱