Microstructure and superconductivity of Cu addition MgB2 wires using Mg2Cu compound as additional source material

被引：32
作者：
Hishinuma, Y.
Kikuchi, A.
Iijima, Y.
Yoshida, Y.
Takeuchi, T.
Nishimura, A.
机构：
[1] Natl Inst Fus Sci, Gifu 5095292, Japan
[2] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan
来源：
SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2006年 / 19卷 / 12期
关键词：
10;
D O I：
10.1088/0953-2048/19/12/008
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The advantages of the MgB2 compound are the high T-c value (39 K) and lower material cost than other superconducting metallic compounds. In addition, MgB2 wire has a shorter decay time for induced radioactive properties than Nb-based superconductors. However, the J(c) value of MgB2 wire is poor compared with Nb-based superconductors, and further improvement of J(c) is required if the compound is to be used in a future nuclear fusion reactor. In order to improve J(c), we investigated Cu addition using the Mg2Cu compound in MgB2/Fe-sheathed wires through the powder-in-tube (PIT) process. T-c values of Cu addition samples were higher than those of non-Cu addition samples and they were improved with increasing Cu addition. We obtained maximum core J(c) values over 100 A mm(-2) at 4.2 K under 8 T for 1 and 3 at.% Cu addition samples. Moreover, we found that Cu addition was more effective at improving the value of J(c) in low and middle magnetic fields than the SiC addition process.
引用
收藏
页码：1269 / 1273
页数：5
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