摘要
采用放电等离子烧结技术制备了各向异性微米晶SmCo_5磁体,研究了磁体的烧结工艺及添加Fe纳米粉对磁体结构和磁性能的影响。研究发现,SmCo_5烧结磁体的最佳烧结温度为830℃,此时磁体的室温磁性能最佳:B_r=8.19 kGs,H_(cj)=10.6 kOe,(BH)_(max)=13 MGOe;而添加Fe纳米粉的烧结磁体,饱和磁化强度升高,但剩磁和矫顽力降低。XRD结果表明,未添加Fe纳米粉的烧结磁体具有单相CaCu_5结构,而添加Fe纳米粉的烧结磁体出现了2∶17相和Fe-Co软磁相。SEM及能谱分析发现,添加的Fe纳米粉扩散进入了1∶5相,形成Sm(Fe,Co)_5和Sm_2(Fe,Co)_(17))。
Anisotropic microgram SmCo_5 sintered magnet was prepared by spark plasma sintering technique（SPS）.The preparation process of the SmCo_5 magnets was studied as well as the properties and structure of SmCo_5 magnets doping with Fe nano-powders.The optimal magnetic properties of the SmCo_5 magnet are B_r of 8.19 kGs,H_（cj） of10.6 kOe and（BH）_（max） of 13 MGOe when the sintering temperature is 830 ℃.Moreover,the SmCo_5 magnet doping with Fe nano-powders shows higher magnetization,but lower remanence and coercivity.XRD patterns showed that the SmCo_5 magnet exhibits CaCu_5 structure,however,2：17 phase and Fe-Co phase appear in the SmCo_5 magnet doping with Fe nano-powders.SEM and EDS analysis indicate that the microstructure of the SmCo_5 magnet doping with Fe nano-powders is composed of 1：5 phase and 2：17 phase.
出处
《金属功能材料》
CAS
2014年第3期5-9,共5页
Metallic Functional Materials
基金
国家863项目(2012AA603201)
新金属材料国家重点实验室开放基金(2011-ZD02)
留学人员回国启动基金的支持
