Thermomechanical treatment, structure and transport currents in multicore Bi(2223)/Ag tapes

被引：22
|
作者：
Kovác, P
Husek, I
Rosova, A
Pachla, W
机构：
[1] Slovak Acad Sci, Inst Elect Engn, Bratislava 84239, Slovakia
[2] Polish Acad Sci, High Pressure Res Ctr, PL-01142 Warsaw, Poland
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1999年 / 312卷 / 3-4期
关键词：
critical current density; grain alignment (texturing); scanning electron microscopy; transmission electron microscopy; anisotropy; pinning force;
D O I：
10.1016/S0921-4534(98)00675-3
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A set of 19 filament Bi(2223)/Ag tapes differing in thermomechanical treatment were analyzed structurally (XRD, SEM and TEM) and electrically by transport I-c measurement in self field, in external magnetic field up to 1.2 T, and by I-c-angular dependence, all at 77 K. The results obtained show that the optimal state for the application of a roll-sinter step is at the 2223/2212 phase ratio near to 1 (50% of 2223). The structural results (2223 phase content, grains morphology and texture) were studied, and they were related to the transport currents. I-c(0 T), I-c(B) and I-c(alpha) as well as the n-exponent of current-voltage characteristics and its relation to I-c are studied and discussed in connection with the structure induced by the thermomechanical treatment applied. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：179 / 190
页数：12
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