Cold pressing and its effect on microstructure of(Bi-2223)/Ag superconducting tapes
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摘要: 进行了(Bi-2223)/Ag超导带材冷压工艺的优化研究。结果表明,冷压工艺可以有效提高带材的致密度和晶粒取向度,最终改善了带材的超导性能。带材优化的冷压工艺参数是838℃/60h+冷压+838℃/60h+冷压+838℃/60h,第一次压力为2GPa,第二次2.5GPa;冷压压下速率为1.5×10-4mm/s。Abstract: Cold pressing of Ag clad Bi 2223 superconducting tapes was systematically studied.The results showed that cold pressing was effective to fabricate tapes with good texture and high J C values.The optimum technical parameters are sintering thress times at 838℃ for 60h and pressing twice with pressure 2 0 GPa and 2 5 GPa for the first and second compaction respectively.Reduction rate of cold pressing was 1 5×10-4 mm/s.
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Keywords:
- Bi based superconducting tapes /
- cold pressing
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