纳米晶(Nd,Ce)-Fe-B/(Nd,R)-Fe-B(R=Pr,La)热压磁体的制备和性能研究  

Preparation and Performance of Nano-crystalline(Nd,Ce)-Fe-B/(Nd,R)-Fe-B(R=Pr,La)Hot-pressed Magnets

作　　者：危伟国 江庆政 刘增国[1,2] WEI Weiguo;JIANG Qingzheng;LIU Zengguo(Jiangxi Key Laboratory for Rare Earth Magnetic Materials and Devices,Ganzhou 341000,Jiangxi,China;Institute for Rare Earth Magnetic Materials and Devices,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China)

机构地区：[1]江西省稀土磁性材料及器件重点实验室,江西赣州341000 [2]江西理工大学稀土磁性材料及器件研究所,江西赣州341000

出　　处：《有色金属科学与工程》2025年第1期65-74,共10页Nonferrous Metals Science and Engineering

基　　金：国家自然科学基金资助项目(52061015);江西省重大科技研发专项(20213AAE02016);江西省自然科学基金项目(20212BAB214018)。

摘　　要：基于双合金技术,采用放电等离子体烧结制备了不同比例的各向同性纳米晶(Nd,Ce)-Fe-B/(Nd,R)-Fe-B(R=Pr,La)热压磁体,并探究了不同热压磁体的磁性能和微观结构。结果表明,随着(Pr,Nd)-Fe-B合金的添加,剩磁和矫顽力均有所提升。背散射图像(结果)表明,团聚的块状富稀土相逐渐消失,晶界相变得更为均匀且薄,从而提升了矫顽力。此外,磁体中(Pr,Nd)-Fe-B主相比例的增加,也有效地提升了热压磁体的磁性能。当添加量(质量分数,下同)为60%时,磁体剩磁J_(r)为8.58×0.1(T),矫顽力H_(cj)为12.65×79.6(kA/m),最大磁能积(BH)_(max)为15.79×7.96(kJ/m^(3))。Based on the dual-alloy technology,isotropic nanocrystalline(Nd,Ce)-Fe-B/(Nd,R)-Fe-B(R=Pr,La)hot-pressed magnets with different proportions were prepared by spark plasma sintering,and the magnetic properties and microstructure of the hot-pressed magnets were investigated.The results show that the remanence and coercivity are improved with the addition of(Pr,Nd)-Fe-B alloy.BSE images(results)shows that the agglomerated block rare earth-rich phase gradually disappears,and the grain boundary phase becomes more uniform and thin,thereby increasing the coercivity.In addition,the increase of the proportion of(Pr,Nd)-Fe-B main phase also effectively improves the magnetic properties of hot-pressed magnets.When the addition amount is 60%,the magnetic properties of J_(r)=8.58×0.1(T),H_(cj)=12.65×79.6(kA/m),(BH)_(max)=15.79×7.96(kJ/m^(3))were obtained.

关 键 词：双合金 磁性能 微观结构 放电等离子烧结 

分 类 号：TM271.3[一般工业技术—材料科学与工程] TF125.8[电气工程—电工理论与新技术]