磁场热处理对Sm2Co17磁体磁性能及微结构的影响  

Effect of magnetic field annealing on the microstructure and magnetic properties of Sm_2Co_(17) permanent magnets

作　　者：马强[1] 杨德武 胡志峰 张泽宇 刘明洞 刘艳丽[1] 刘欣[1] 鞠向明[1] WANG Jing ZHANG Xue-feng LI Yong-feng MA Qiang;YANG De-wu;HU Zhi-feng;ZHANG Ze-yu(School of Science, Inner Mongolia University of Science & Technology, Baotou 014010, China;Key Laboratory of Integrated Exploitation of Bayan Obo Multi-metal Resources,Inner Mongolia University of Science & Technology, Baotou 014010, China)

机构地区：[1]内蒙古科技大学内蒙古自治区白云鄂博矿多金属资源综合利用国家重点实验室培育基地,内蒙古包头014010 [2]内蒙古科技大学理学院,内蒙古包头014010 [3]School of Science, Physics and Biological Engineering, Inner Mongolia University of Science& Technology [4]Key Laboratory of Integrated Exploitation of Bayan Obo Multi-metal Resources,Inner Mongolia University of Science & Technology

出　　处：《磁性材料及器件》2018年第2期39-43,共5页Journal of Magnetic Materials and Devices

基　　金：内蒙古科技大学大学生科技创新基金资助项目(2016095);内蒙古自治区高等学校科学研究项目(NJZY17169)

摘　　要：2:17型SmCo永磁体由于其优异的高温特性,而作为高温磁体广泛应用于航空航天、能源、医疗等高科技领域,而新技术的发展对于2:17型SmCo永磁体的磁性能提出了更高的要求,磁场热处理是一种改善磁体磁性能的有效方法。研究了磁场热处理温度及时间对2:17型SmCo永磁体磁性能和微结构的影响,并考察了相应的磁畴和微观结构。实验结果表明,当磁场热处理的温度为400℃、热处理时间为1 h时,并在磁场中冷却,磁体的综合性能最好,剩磁Br为10.99 kG,提高了5.17%,矫顽力Hcj为1545.04 kA/m,提高了16.93%,最大磁能积(BH)max为223.84 kJ/m^3,提高了10.19%,并且磁畴尺寸细化变窄,矫顽力有显著提高。Sm2Co17type permanent magnet material has found wide applications in aerospace,energy sources,and medical treatments for its excellent high temperature performance.The development of high and new technology also puts forward higher requirement for performance of Sm2Co17type magnet materials.It is found that the properties of Sm2Co17type magnet can be improved by magnetic heat treatment.In present study,magnetic field(up to0.9T)annealing treatment was applied to Sm2Co17permanent magnets.The magnetic properties,crystal structure,and magnetic domain of both the original magnets and the treated magnets were systematically studied.Results indicate that,for magnetic field heat treatment temperature of400℃for1h and cooling in magnetic field,the magnets have excellent magnetic properties:Br=10.99kG,Hcj=1545.04kA/m and(BH)max=223.84kJ/m3increased by5.17%,16.93%,and10.19%,respectively.The enhancement of coercivity attributes to the domain refinement.

关 键 词：Sm2Co17磁体 磁场热处理 磁畴 磁性能 

分 类 号：TM273[一般工业技术—材料科学与工程]