Effect of high-temperature vacuum degassing on microstructure and current-carrying capacity of the Bi-2212 wire
Effect of high-temperature vacuum degassing on microstructure and current-carrying capacity of the Bi-2212 wire
复制标题
高温真空脱气对Bi-2212导线组织和载流能力的影响
DOI：
10.1016/j.jallcom.2018.01.375
复制
发表时间：
2018-04-25
影响因子：
6.2
通讯作者：
Bai, L. F.
中科院分区：
文献类型：
--
作者：
Hao, Q. B.;Li, C. S.;Bai, L. F.
The voids in Bi2Sr2CaCu2Ox (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 K and 5 T. (c) 2018 Elsevier B.V. All rights reserved.
