Development of Bi-2223HTS tape and its application to coil and current leads

被引：9

作者：

Oh, SS ^{[1
]}

Ha, HS ^{[1
]}

Ha, DW ^{[1
]}

Jang, HM ^{[1
]}

Park, C ^{[1
]}

Song, KJ ^{[1
]}

Kwon, YK ^{[1
]}

Ryu, KS ^{[1
]}

机构：

[1] Korea Electrotechnol Res Inst, Chang Won 641120, South Korea

来源：

CRYOGENICS | 2002年 / 42卷 / 6-7期

关键词：

powder-in-tube; Bi-2223; bubbling; superconducting joint; persistent mode; current decay; current lead;

D O I：

10.1016/S0011-2275(02)00055-3

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

We are developing Bi-2223/Ag tapes with a high engineering critical current density by optimizing the powder-in-tube process and are studying its application to coil and current leads. We have fabricated 250 m-long tape and investigated optimized processing conditions to enhance engineering critical current density. More bubbling was found when the tape was heat-treated with a higher heating rate. Different kinds of superconducting joints were fabricated with multi-filamentary Bi-2223/Ag tapes, and 58% of retained I-c was achieved using the insertion of Bi-2223 core between two exposed tapes. Current decay property of the persistent mode HTS coil was investigated. Rapid current decay was observed when the operating current is in a flux-flow range. We could successfully fabricate a low heat leak type HTS current lead with Bi-2223/Ag-Au tapes by employing a stepped geometry. Using this lead, safe operation of 2 kA current transport was confirmed. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：377 / 382

页数：6

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