ENHANCED FLUX PINNING THROUGH A PHASE FORMATION- DECOMPOSITION-RECOVERY PROCESS IN AG-SHEATHED Bi(Pb)SrCaCuO WIRES

被引:6
作者
Dou, S. X. [1 ]
Liu, H. K. [1 ]
Guo, Y. C. [1 ]
Shi, D. L. [2 ]
机构
[1] Univ New S Wales, Sch Mat Sci & Engn, Kensington, NSW 2033, Australia
[2] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60349 USA
关键词
D O I
10.1109/77.233354
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A high-T-c phase formation-decomposition-recovery (PFDR) process has been developed for fabrication of Ag-sheathed (Bi,Pb)(2)Sr2Ca2Cu3O10+y (2223) wires with a short period of melt during the heat treatment. A IC of 40,000 A/cm(2) at 77 K and zero Tesla and of 9,000 A/cm(2) at 77 K and 1 Tesla has been achieved. The irreversibility line for the PFDR tape is shifted to much higher temperature than those for the normal tape and powder sample for fields up to 6 T. The PFDR processed samples contain a large amount of small spheres of Sr- and Ca-rich phase with a diameter of 1 mu m to 3 mu m, well aligned 2223 grains, highly dispersed, textured 2212 and high concentrations of dislocations (10(10)/cm(2)) and stacking faults. The strong coupling between grains is attributed to the interfacial pinning.
引用
收藏
页码:1135 / 1138
页数:4
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