SPS烧结双主相Sm_(2)Co_(17)-Ce_(2)Co_(17)复合永磁体的微观组织  

Microstructure of dual main phase Sm_(2)Co_(17)-Ce_(2)Co_(17) composite permanent magnets sintered by SPS

作　　者：徐成福[1,2,3] 傅森杨 马冬冬 顾正飞 马垒[2] 阳永泉[1] 高新强 刘荣进 XU Cheng-fu;FU Sen-yang;MA Dong-dong;GU Zheng-fei;MA Lei;YANG Yong-quan;GAO Xin-qiang;LIU Rong-jin(Guangxi Key Laboratory of Special Engineering Equipment and Control,School of Mechanical Engineering,Guilin University of Aerospace Technology,Guilin 541004,China;Guangxi Key Laboratory of Information Materials,Guilin University of Electronic Technology,Guilin 541004,China;College of Material Science and Engineering,Guilin University of Technology,Guilin 541004,China;Ganjiang Innovation Academy,Chinese Academy of Sciences,Ganzhou 341119,China)

机构地区：[1]桂林航天工业学院机电工程学院广西特种工程装备与控制重点实验室,广西桂林541004 [2]桂林电子科技大学广西电子信息材料构效关系重点实验室,广西桂林541004 [3]桂林理工大学材料科学与工程学院,广西桂林541004 [4]中国科学院赣江创新研究院,江西赣州341119

出　　处：《材料热处理学报》2024年第5期40-47,共8页Transactions of Materials and Heat Treatment

基　　金：广西自然科学基金(2021GXNSFAA220081);国家自然科学基金(52361004,52171054);广西信息材料重点实验室开放研究基金(221021-K)。

摘　　要：研究了放电等离子烧结(SPS)工艺和退火温度对双主相Sm_(2)Co_(17)-Ce_(2)Co_(17)复合永磁体微观组织的影响。结果表明:制备双主相Sm_(2)Co_(17)-Ce_(2)Co_(17)复合永磁体的最佳SPS工艺为:烧结温度750℃、压强64 MPa、烧结时间10 min,这样有利于减少稀土元素之间的扩散。退火可使烧结后磁体中存在的非晶相晶化。退火温度越高,双主相磁体中的稀土元素之间越容易相互扩散,Ce原子易扩散到Sm_(2)Co_(17)相中取代Sm原子,而Sm原子扩散到Ce_(2)Co_(17)相中取代Ce原子的机会就相对较少些,且在Sm_(2)Co_(17)相与Ce_(2)Co_(17)相的边界处形成一个过渡的富稀土区。Influence of spark plasma sintering(SPS)process and annealing temperature on microstructure of dual main phase Sm_(2)Co_(17)-Ce_(2)Co_(17) composite permanent magnets was studied.The results show that the optimal SPS process for preparing dual main phase Sm_(2)Co_(17)-Ce_(2)Co_(17) composite permanent magnets is:sintering temperature of 750℃,pressure of 64 MPa,and sintering time of 10 min,which is conducive to reducing the diffusion between rare earth elements.Annealing can crystallize the amorphous phase present in the sintered magnet.The higher the annealing temperature,the easier it is for the rare earth elements in the dual main phase magnet to diffuse with each other.Ce atoms are more likely to diffuse into the Sm_(2)Co_(17) phase to replace Sm atoms,while the chances of Sm atoms diffusing into the Ce_(2)Co_(17) phase to replace Ce atoms are relatively less.Moreover,a transitional rare earth rich region is formed at the boundary between Sm_(2)Co_(17) and Ce_(2)Co_(17) phases.

关 键 词：双主相Sm_(2)Co_(17)-Ce_(2)Co_(17)复合永磁体 放电等离子烧结(SPS) 退火温度 微观组织 

分 类 号：TG132.2[一般工业技术—材料科学与工程]