MnAl永磁合金研究进展  

Research progress of MnAl permanent magnet alloy

作　　者：常向鹏 周新 张红丽 赖嘉琪 陈小立 马毅龙[1] CHANG Xiang-peng;ZHOU Xin;ZHANG Hong-li;LAI Jia-qi;CHEN Xiao-li;MAYi-long(School of Metallurgy and Materials Engineering,Chongqing University of Science and Technology,Chongqing 401331,China)

机构地区：[1]重庆科技学院冶金与材料工程学院,重庆401331

出　　处：《磁性材料及器件》2022年第4期98-104,共7页Journal of Magnetic Materials and Devices

基　　金：重庆科技学院研究生科技创新项目(YKJCX2020213)。

摘　　要：MnAl合金作为一种非稀土永磁材料,具有良好的综合磁性能(理论磁能积为12 MGOe)、优异的机械加工性、高比强度、弹性模量和抗腐蚀性及较低的成本,被广泛应用于通讯、电动机、仪器仪表等领域。τ相作为MnAl合金体系中唯一的铁磁性相,通常由热处理淬火后恒温回火或控制冷却的方法获得,即先由高温非磁性的ε相(HCP结构)通过有序反应形成中间非磁性的ε相,最终转变成铁磁性的τ相(FCT结构)。为了能够获得高纯度τ相MnAl合金,研究人员尝试了多种试验方案和处理方法,如电弧熔炼、磁控溅射、熔体快淬、机械球磨等,旨在提高材料的磁性能,希望能够在稀土资源日渐消耗的今天,代替或取代稀土永磁材料,应对稀土资源危机。As a kind of non-rare earth permanent magnet material,MnAl alloy has good comprehensive magnetic properties(theoretical magnetic energy product is 12 MGOe),excellent machinability,high specific strength,elastic modulus,corrosion resistance and low cost,which is widely used in communication,motor,instrumentation and other fields.Theτ-phase,as the only ferromagnetic phase in MnAl alloy system,is usually obtained by heat treatment after quenching,constant tempering or controlled cooling,that is,the intermediate non-magneticε-phase(HCP structure)is formed by orderly reaction,and finally transformed into ferromagneticε-phase(FCT structure).In order to obtain high purityτ-phase MnAl alloy,researchers have tried a variety of experimental schemes and processing methods,such as arc melting,magnetron sputtering,melt quenching,mechanical ball grinding and so on,for the improvement of magnetic properties.To cope with the crisis of rare earth resources by replacing rare earth permanent magnet materials,when rare earth resources are increasingly consumed.

关 键 词：MnAl合金 磁性能 τ相 非稀土永磁材料 

分 类 号：TM273[一般工业技术—材料科学与工程]