Transport critical current on Fe-sheathed MgB2 coils

被引：18
作者：
Fang, H [1 ]
Putman, PT
Padmanabhan, S
Zhou, YX
Salama, K
机构：
[1] Univ Houston, Texas Ctr Superconduct & Adv Mat TcSAM, Houston, TX 77204 USA
[2] Univ Houston, Dept Mech Engn, Houston, TX 77204 USA
来源：
SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2004年 / 17卷 / 04期
关键词：
D O I：
10.1088/0953-2048/17/4/028
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Helical windings of Fe-sheathed MgB2 wires with different dimensions were fabricated by a wind-and-react process. Wires with a cross-sectional area of I mm 2 and 20% superconductor core were made using the powder-in-tube (PIT) method and ultra-fine starting precursors. Very good grain connectivity as well as high core density was obtained by using this method. At 20 K and self-field, the critical current of a coil with an ID of 12 mm and 12 turns was 360 A, which is equivalent to a J(c) of 1.8 x 10(5) A cm(-2). At a 6 T external magnetic field and 4.2 K, a coil with an ID of 140 mm and 10 turns possessed a Jc of 1 x 10(4) A cm(-2). These results are a step towards the application of MgB2 wires in the temperature range of 20-30 K and high magnetic fields.
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页码：717 / 720
页数：4
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