热变形温度对SmCo/FeCo纳米复合磁体磁性能的影响  

Effects of Deformation Temperature on Magnetic Properties of SmCo/FeCo Nanocomposite Magnets

作　　者：李孝森 安士忠 贺建[4] 吕贵红 李武会[1,2,3] 任凤章[1,2,3] LI Xiaosen;AN Shizhong;HE Jian;LV Guihong;LI Wuhui;REN Fengzhang(Materials Science&Engineering school,Henan University of Science&Technology,Luoyang 471023,China;Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology,Henan University of Science&Technology,Luoyang 471023,China;Henan Key Laboratory of Nonferrous Materials Science and Processing Technology,Henan University of Science&Technology,Luoyang 471023,China;Magnetic Material Measurements Laboratory,National Institute of Metrology,Beijing 100029,China)

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471023 [2]河南科技大学有色金属材料与先进加工技术省部共建协同创新中心,河南洛阳471023 [3]河南科技大学河南省有色金属材料科学与加工技术重点实验室,河南洛阳471023 [4]中国计量科学研究院磁性测量实验室,北京100029

出　　处：《河南科技大学学报（自然科学版）》2022年第1期7-12,M0002,M0003,共8页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家自然科学基金项目(51701066)。

摘　　要：采用热变形技术,制备了SmCo/FeCo纳米复合磁体,研究了热变形温度对磁体磁性能的影响规律。通过X射线衍射、热重分析、扫描电子显微镜和透射电子显微镜研究了磁体的相组成和微观结构。研究结果表明:随着热变形温度从600℃升高到1000℃,Sm_(2)Co_(17)硬磁相的含量不断增加,FeCo软磁相的含量不断减少,SmCo/FeCo纳米复合磁体的矫顽力从1.54 kOe提升到5.04 kOe;饱和磁化强度先增加后降低,剩余磁化强度呈“先升高、后降低、再升高”的趋势。相对于含有部分非晶相的600℃热变形磁体,700℃热变形磁体的晶化程度更高,饱和磁化强度和剩余磁化强度在700℃达到最大值。SmCo/FeCo nanocomposite magnets were prepared by hot deformation technique.The effects of deformation temperature on the magnetic properties of the magnets were investigated.The phase constitution and microstructure were studied by X-ray diffraction,thermogravimetry,scanning electron microscopy and transmission electron microscope.Research shows that when the deformation temperature increases from 600℃ to 1000℃,the content of Sm_(2)Co_(17) hard magnetic phase increases and the content of FeCo soft magnetic decreases.The coercivity of SmCo/FeCo nanocomposite magnets increases from 1.54 kOe to 5.04 kOe.The saturation magnetization of the magnets increases first and then decreases.The remanence of the magnets increases first,then decreases before increasing again.Compared with the 600℃ deformed magnets with partial amorphous phase,the saturation magnetization and remanence reach the maximum at 700℃ because of the higher degree of crystallization.

关 键 词：热变形温度 SmCo/FeCo 纳米复合磁体 相组成 磁性能 

分 类 号：TB381[一般工业技术—材料科学与工程]