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

被引：2
|
作者：
Liu, H. R. [1 ,4 ]
Yang, F. [2 ]
Han, F. G. [3 ]
Xie, Z. W. [1 ]
Jin, L. H. [2 ]
Wang, Q. Y. [2 ]
Xiong, X. M. [2 ]
Feng, J. Q. [2 ]
Li, C. S. [2 ]
Li, K. Z. [4 ]
Zhou, L. [2 ]
机构：
[1] Shandong Jiaotong Univ, Jinan 250300, Peoples R China
[2] Northwest Inst Nonferrous Met Res, Xian 710016, Peoples R China
[3] Shandong Mingde Machinery Co Ltd, Jining, Peoples R China
[4] Northwestern Polytech Univ, Xian 710072, Peoples R China
来源：
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2022年 / 35卷 / 02期
关键词：
MgB2; superconductor; Critical current density; Graphene; Internal Mg diffusion; BARRIER; TI;
D O I：
10.1007/s10948-021-06081-9
中图分类号：
O59 [应用物理学];
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 (I-c) 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 I-c 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.
引用
收藏
页码：429 / 434
页数：6
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