Magnetothermal transition in YBCO melt textured materials

被引：8

作者：

Porcar, L

Bourgault, D

Barbut, JM

Chaud, X

Tournier, R

机构：

[1] Schneider Elect SA, F-38050 Grenoble 9, France

[2] CNRS, CRETA, Lab Cristallog, F-38042 Grenoble 9, France

来源：

CRYOGENICS | 1998年 / 38卷 / 12期

关键词：

critical current density; high Tc superconductors; fault current limiters;

D O I：

10.1016/S0011-2275(98)00108-8

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Conductors cut from large YBCO single domains textured by a combination of Melt Texturing Growth and Top Seeding techniques were studied for Fault Current Limiter applications. In self field, homogeneous transport critical current densities as large as 4 10(4) and 9 10(4) A/cm(2) were measured in shaped YBCO single domains up to 5 cm in length. Above J(c), experiments focused on magnetothermal transitions showed that the silver coating should have an adequate thickness so as to prevent the conductors from burning. Capability of textured materials to support high instantaneous power (40 GW/m(3)) and energy dissipation (190 MJ/m(3)) during the transition was demonstrated in a 4 T magnetic field. (C) 1999 Elsevier Science Ltd. All rights reserved.

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页码：1237 / 1242

页数：6

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