Selection of Fe as a barrier for manufacturing low-cost MgB2 multifilament wires-Advanced microscopy study between Fe and B reaction  

作　　者：Hao Liang Dipak Patel Ziming Wang Akiyoshi Matsumoto Matt Rindfleisch Micheal Tomsic Richard Taylor Fang Liu Yusuke Yamauchi Md.Shahriar A Hossain 

机构地区：[1]School of Mechanical and Mining Engineering,The University of Queensland,St Lucia,Queensland 4072,Australia [2]The Commonwealth Scientific and Industrial Research Organisation(CSIRO),Lindfield,New South Wales 2070,Australia [3]University of Science and Technology of China,Hefei 230026,China [4]Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China [5]National Institute for Materials Science(NIMS),1-2-1 Sengen,Tsukuba,Ibaraki 305-0047,Japan [6]Hyper Tech Research,Inc.,539 Industrial Mile Rd,Columbus,OH 43228,USA [7]Applied Superconductivity Laboratory,Queensland University of Technology,Brisbane,Queensland 4001,Australia [8]Institute of Energy,Hefei Comprehensive National Science Center,Hefei 230031,China [9]Department of Materials Process Engineering,Graduate School of Engineering,Nagoya University,Nagoya 464-8603,Japan [10]Australian Institute for Bioengineering and Nanotechnology(AIBN),The University of Queensland,St Lucia,Queensland 4072,Australia [11]Department of Chemical and Biomolecular Engineering,Yonsei University,50 Yonsei-ro,Seodaemun-gu,Seoul 03722,South Korea

出　　处：《Journal of Magnesium and Alloys》2024年第7期2783-2792,共10页镁合金学报（英文）

基　　金：support from the Australian Research Council(ARC)Linkage Project(LP200200689).

摘　　要：The high cost of using the niobium(Nb)barrier for manufacturing magnesium diboride(MgB2)mono-and multi-filamentary wires for large-scale applications has become one of the barriers to replacing current commercial niobium-titanium superconductors.The potential of replacing the Nb barrier with a low-cost iron(Fe)barrier for multifilament MgB2 superconducting wires is investigated in this manuscript.Therefore,MgB2 wires with Fe barrier sintered with different temperatures are studied(from 650°C to 900°C for 1 h)to investigate the non-superconducting reaction phase of Fe-B.Their superconducting performance including engineering critical current density(Je)and n-value are tested at 4.2 K in various external magnetic fields.The best sample sintered at 650°C for 1 h has achieved a Je value of 3.64×10^(4) A cm^(−2) and an n-value of 61 in 2 T magnetic field due to the reduced formation of Fe2B,better grain connectivity and homogenous microstructure.For microstructural analysis,the focused ion beam(FIB)is utilised for the first time to acquire three-dimensional microstructures and elemental mappings of the interface between the Fe barrier and MgB2 core of different wires.The results have shown that if the sintering temperature can be controlled properly,the Je and n-value of the wire are still acceptable for magnet applications.The formation of Fe2B is identified along the edge of MgB2,as the temperature increases,the content of Fe2B also increases which causes the degradation in the performance of wires.

关 键 词：Superconducting wires MGB2 MRI magnet Engineering critical current density Fe2B 

分 类 号：TM27[一般工业技术—材料科学与工程]