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

页码：429 / 434

页数：6

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