【摘要】 采用放电等离子烧结技术制备了各向异性微米晶SmCo₅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,SmCo₅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CaCu₅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Sm₂（Fe,Co）₁₇)。更多还原

【Abstract】 Anisotropic microgram SmCo₅ sintered magnet was prepared by spark plasma sintering technique（SPS）.The preparation process of the SmCo₅ magnets was studied as well as the properties and structure of SmCo₅ magnets doping with Fe nano-powders.The optimal magnetic properties of the SmCo₅ 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 SmCo₅ magnet doping with Fe nano-powders shows higher magnetization,but lower remanence and coercivity.XRD patterns showed that the SmCo₅ magnet exhibits CaCu₅ structure,however,2:17 phase and Fe-Co phase appear in the SmCo₅ magnet doping with Fe nano-powders.SEM and EDS analysis indicate that the microstructure of the SmCo₅ magnet doping with Fe nano-powders is composed of 1:5 phase and 2:17 phase.更多还原