Improved Superconducting Properties for Multifilament Graphene-Coated Nb Addition MgB2 Wires by an Internal Mg Diffusion Process

被引：0
|
作者：
H. R. Liu
F. Yang
F. G. Han
Z. W. Xie
L. H. Jin
Q. Y. Wang
X. M. Xiong
J. Q. Feng
C. S. Li
K. Z. Li
L. Zhou
机构：
[1] Shandong Jiaotong University,
[2] Northwest Institute for Nonferrous Metal Research,undefined
[3] Shandong Mingde Machinery Co,undefined
[4] Northwestern Polytechnical University,undefined
来源：
Journal of Superconductivity and Novel Magnetism | 2022年 / 35卷
关键词：
MgB; superconductor; Critical current density; Graphene; Internal Mg diffusion;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A novel method is presented for the production of the 6 + 1 filament MgB2 wires using internal Mg diffusion (IMD) process. For the MgB2 long wire with 1.4-mm diameter produced by graphene-coated Nb addition, the critical current (Ic) is about 1000 A at 4 T and 4.2 K, which is 2.5 times higher than that of the undoped sample. The increased Ic is attributed to the enhanced flux pinning force and improved grain connectivity. The obtained results show that graphene-coated Nb addition MgB2 wires have excellent superconductivity and mechanical property compared with the conventional PIT wires in practical application.
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页码：429 / 434
页数：5
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