• 文献标题:   Improved superconducting properties for multifilament graphene-doped MgB2 wires by an internal Mg diffusion process
  • 文献类型:   Article
  • 作  者:   LIU HR, WANG QY, YANG F, JIN LH, XIONG XM, FENG JQ, LI CS, ZHOU L
  • 作者关键词:   ceramic, metalic composite, microstructure, functional, imd
  • 出版物名称:   MATERIALS LETTERS
  • ISSN:   0167-577X EI 1873-4979
  • 通讯作者地址:   Northwest Inst Nonferrous Met Res
  • 被引频次:   0
  • DOI:   10.1016/j.matlet.2018.05.109
  • 出版年:   2018

▎ 摘  要

We have fabricated 6 + 1-filament MgB2 wires using an internal Mg diffusion (IMD) process. For the 3 at% graphene (G) doped long wire with 1.4 mm diameter, the critical current is about 530 A at 4 T, which is 45% higher than that of the undoped sample. Moreover, the G doped wire has higher irreversible strain of 38% in comparison to the undoped one of 30% after 650 degrees C x 2 h annealing. The obtained results show that the G doped IMD wires with excellent superconductivity and mechanical property can compete with the conventional PIT wires in practical application. (C) 2018 Elsevier B.V. All rights reserved.