富铁低锆Sm_(2)Co_(17)型烧结永磁材料磁性能提升机理研究  

Magnetic properties enhancement mechanism for Sm_(2)Co_(17)-type permanent magnets with high Fe and low Zr content

作　　者：王帅[1] 雍辉 韩婷 朱亚武 胡季帆 WANG Shuai;YONG Hui;HAN Ting;ZHOU Yawu;HU Jifan(College of Materials Science&Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China)

机构地区：[1]太原科技大学材料科学与工程学院,太原030024

出　　处：《功能材料》2023年第1期1202-1207,共6页Journal of Functional Materials

基　　金：太原科技大学博士科研启动基金(20202040,20202041);来晋工作优秀博士奖励资金(20212046,20212042)。

摘　　要：高磁能积Sm_(2)Co_(17)型烧结永磁体的磁性能和其合金成分及微观结构密切相关。通过调整Fe、Zr含量,优化微观结构,使磁体最大磁能积(BH)_(max)和内禀矫顽力H_(cj)得到了同步提升。采用PFM、EPMA、TEM等先进的分析测试方法,研究了微观结构对磁体磁性能的影响。研究表明,随着Fe含量由15%增加到19%,Zr含量由3%降低到2.6%(质量分数),磁体剩磁B r由1.07 T增加到1.13 T,(BH)_(max)也由217.15 kJ/m^(3)增加到241.19 kJ/m^(3),同时,磁体H_(cj)也得到一定提高,由2641.13 kA/m增加到2774.86 kA/m。通过提高Fe含量,降低Zr含量,可以使磁体内避免生成块状富Zr相,提高磁体B r和(BH)_(max)。当Fe含量为19%(质量分数),Zr含量为2.6%(质量分数)时,磁体获得了较大尺寸的胞组织,胞壁处有较高的峰值Cu浓度(26.9%(质量分数)),这是磁体H_(cj)同时提高的主要原因。The magnetic properties of Sm_(2)Co_(17)sintered permanent magnets are closely related to its composition and microstructures.In this work,the(BH)max and H_(cj)were increased synchronously by adjusting the Fe and Zr content and optimizing the microstructures.The effects of microstructures on magnetic properties were studied by using PFM,EPMA and TEM.The results show that with the increase of Fe content from 15 wt%to 19wt%and Zr content from 3 wt%to 2.6 wt%,B r increases from 1.07 T to 1.13 T,(BH)_(max)increases from 217.15 kJ/m^(3)to 241.19 kJ/m^(3),and the H_(cj)also increases from 2641.13 kA/m to 2774.86 kA/m.By increasing Fe content and decreasing Zr content,the formation of Zr-rich phase in the magnets can be avoided,leading to the increased B r and(BH)_(max).When Fe content is 19wt%and Zr content is 2.6wt%,the magnet can obtain larger cell size and higher Cu concentration(26.9wt%)at cell boundaries,which is the main reason for the simultaneous increase of H_(cj)of the magnet.

关 键 词：Sm_(2)Co_(17)型永磁材料 微观结构 Fe含量 内禀矫顽力 磁性能 

分 类 号：TG132.2[一般工业技术—材料科学与工程]