Bi-2223 bar current leads fabricated by the combination of cold isostatic pressing and hot-pressing

A new method using a combination of cold isostatic pressing (CIP) and hot-pressing (HP) was applied to fabricate Bi-2223 bar current leads. The critical current density ( J c) achieved by this method reached as high as 1000 A/cm 2 at 77 K and self-generated magnetic field. This value of J c presente...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 1999-07, Vol.320 (3), p.183-188
Main Authors: Fu, X.K., Rouessac, V., Guo, Y.C., Mikheenko, P.N., Liu, H.K., Dou, S.X.
Format: Article
Language:English
Subjects:
Bi-2223
Cold isostatic pressing
Hot-pressing
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Summary:A new method using a combination of cold isostatic pressing (CIP) and hot-pressing (HP) was applied to fabricate Bi-2223 bar current leads. The critical current density ( J c) achieved by this method reached as high as 1000 A/cm 2 at 77 K and self-generated magnetic field. This value of J c presented here is much higher than the best J c reported for rod current leads which is 570 A/cm 2 achieved by CIP technique [Y. Yamada, Bi-based bulk current leads and their applications, in: H. Meada, K. Togano (Eds.), Bismuth-based High-temperature Superconductors, 1996, p. 277.]. The phases and microstructures were analysed by XRD and SEM. The texture and weak link were studied by pole figures and AC susceptibility, respectively. The results show that the grain connectivity, matrix density and texture of the samples were improved significantly by this method.
ISSN:0921-4534
1873-2143
DOI:10.1016/S0921-4534(99)00343-3