Fibrous structure and critical current density of MgB2 superconducting wire

被引：15
作者：
Uchiyama, D. [1 ]
Mizuno, K. [1 ]
Akao, T. [1 ]
Maeda, M. [1 ]
Kawakami, T. [1 ]
Kobayashi, H. [1 ]
Kubota, Y. [1 ]
Yasohama, K. [1 ]
机构：
[1] Nihon Univ, Coll Sci & Technol, Chiyoda Ku, Tokyo 101, Japan
来源：
CRYOGENICS | 2007年 / 47卷 / 5-6期
关键词：
MgB2; wire; superconducting cable; critical current density;
D O I：
10.1016/j.cryogenics.2007.03.003
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
A novel MgB2 superconducting wire has been fabricated by the in situ powder-in-tube method with fine B powders (0.25 mu m) and coarse Mg ones (150 mu m). The core of this wire has a fibrous structure, which consists of a lot of MgB2 filaments. The critical current density J(c) has been found to increase with decreasing a wire size, and J(c) of the I mm wire is 1.4 x 10(4) A/cm(2) at a temperature of 20 K in a field of 4 T. In addition, it has been revealed from an experiment with a MgB2 tape made by flat-rolling the wire that filament surfaces have a substantial contribution to flux pinning. (c) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码：282 / 286
页数：5
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