Effect of high-temperature vacuum degassing on microstructure and current-carrying capacity of the Bi-2212 wire
| Autor: | Xiaoyan Xu, G.F. Jiao, C.S. Li, H.L. Zheng, Q.B. Hao, Shengnan Zhang, Guoqing Liu, Bai Lifeng |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Mechanical Engineering Metals and Alloys 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Adsorption Mechanics of Materials 0103 physical sciences Materials Chemistry Carrying capacity Critical current Texture (crystalline) Composite material Current (fluid) 010306 general physics 0210 nano-technology |
| Zdroj: | Journal of Alloys and Compounds. 742:897-902 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2018.01.375 |
| Popis: | 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/mm2 at 4.2 K and 5 T. |
| Databáze: | OpenAIRE |
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