摘要
制备了Bi2.10Sr1.96Ca1.0Cu2.00Ox/Ag和Bi2.00Sr2.05Ca0.95Cu2.00Ox/Ag2种带材,研究了在885℃保温不同时间的熔化-淬火态样品的微观组织。结果显示,2212相在Bi2.10Sr1.96Ca1.0Cu2.00Ox/Ag样品中的分解速度快,而在Bi2.00Sr2.05Ca0.95Cu2.00Ox/Ag样品中的分解速度相对较慢。在885℃保温10min后,Bi2.10Sr1.96Ca1.0Cu2.00Ox/Ag样品中的2212相全部分解,而Bi2.00Sr2.05Ca0.95Cu2.00Ox/Ag样品存在74.4%的2212相。原因是2种样品中Bi和Sr的含量不同。Bi含量高会导致2212体系的熔点降低,而Sr含量高则2212体系的熔点升高。在885℃保温30min后,2种样品中2212均完全熔化分解。EDS分析表明,熔化-淬火的样品中主要相组成是2201相、14:24AEC相、91150相和少量的再生2212相。在885℃,14:24AEC相晶粒尺寸随着保温时间延长而长大。
Bi2.10Sr1.96Ca1.0Cu2.00Ox/Ag and Bi2.00Sr2.05Ca0.95Cu2.00Ox/Ag tapes were perpetrated in this paper. The microstructures of the 2 tapes melt-quenched at 885℃ for different time have been investigated. It is found that the 2212 phases decompose quickly in the Bi2.10Sr1.96Ca1.0Cu2.00Ox /Ag tapes, but slowly in the Bi2.00Sr2.05Ca0.95Cu2.00Ox/Ag tapes. At 885℃ for 10 min, the 2212 phases decompose completely in Bi2.10Sr1.96Ca1.0Cu2.00Ox/Ag tapes , whereas 74.4% of 2212 phases exist in Bi2.00Sr2.05Ca0.95Cu2.00Ox/Ag tapes. The reason is that the melting temperature can be reduced in the sample rich in Bi, and increased in the sample rich in Sr in the 2212 system. At 885 ℃ for 30 min, the 2212 phases decompose completely in both tapes. The EDS analysis shows that the main phases are 2201 phase, 14：24AEC phase and 91150 phase and a few reformated 2212 phases in the tapes after melt-quenched. The size of 14：24AEC phases becomes bigger at 885 ℃ for a longer time during melting.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2008年第A04期169-172,共4页
Rare Metal Materials and Engineering
基金
陕西省13115项目(2007ZDKG-45)资助
