SmCo_5/α-Fe双相复合纳米晶磁体的结构与磁性研究  

Structure and Magnetic Properties of SmCo_5/α-Fe Nanocomposite Permanent Magnets Prepared by Spark Plasma Sintering Technique

作　　者：崔子振[1] 刘卫强[1] 岳明[1] 张久兴[1] 

机构地区：[1]北京工业大学材料科学与工程学院,北京100124

出　　处：《纳米科技》2010年第2期30-32,86,共4页

基　　金：国家高新技术研究发展项目（2007AA03Z458）; 北京市自然科学基金项目（2041001）

摘　　要：超声波分解Fe（CO）5的产物Fe纳米颗粒,通过非均相沉淀获得包覆型SmCo5/α-Fe双相复合磁粉,采用放电等离子快速热压技术（Spark Plasma Sintering,SPS）制备出全致密的各向同性Sm-Co5/α-Fe双相复合纳米晶磁体,研究发现,软磁相α-Fe添加后,磁体的剩磁Mr有所提高,矫顽力Hci则有所减小,随后通过对各向同性磁体进行热变形制备出各向异性磁体,形成了较好的C轴晶体织构。软磁相α-Fe名义含量为10%时,磁体磁性能为：μ0Ms=1.01T、μ0Mr=0.86T、Hci=0.1708T。Fe nanoparticles prepared by sonochemical decomposition of Fe （CO）5 were heterogeneously precipitated onto the surface of SmCo5 powders to produce the SmCo5/Fe composite powders. The powders were sintered into bulk SmCo5/ α-Fe nanocomposite permanent magnets via spark plasma sintering （SPS）. It was found that the remanence of SmCo5/αFe magnets increased obviously with the addition of the soft magnetic phase, while the coercivity declined simultaneously. The anisotropic SmCo5/α-Fe magnets, which exhibit strong c-axis crystal texture of SmCo5 phase, were prepared by subsequent hot deformation method. The magnet with the nominal content of 10%Fe has a magnetic properties of μ0Ms= 1.01T,μ0Mr=0.86T,Hci=0.1708T.

关 键 词：SmCo5/α-Fe双相复合纳米晶磁体 声化学包覆 放电等离子烧结 热变形 

分 类 号：TM273[一般工业技术—材料科学与工程]