摘要
采用粉末冶金法制备烧结Sm(Co_(0.72)Fe_(0.15)Cu_(0.1)Zr_(0.03))_(7.5)永磁体,研究球磨时间对磁粉粒度、成分以及磁体磁性能的影响,并借助扫描电镜分析永磁体的显微组织结构,利用X射线电子能谱对永磁体进行成分分析。结果表明,球磨时间对磁粉平均粒度、粒度分布、永磁体磁性能、局部成分以及显微结构都有较大影响。Sm(Co_(0.72)Fe_(0.15)Cu_(0.1)Zr_(0.03))_(7.5)合金磁粉的最佳球磨时间是30 min,磁粉平均粒度大约为5.44μm,磁体孔隙较少,致密度较高,烧结时析出Sm_2O_3晶粒较少,在一定烧结和时效工艺下,制备的永磁体的综合磁性能最优:剩磁B_r=1.08 T(10.8 k Gs),感应矫顽力H_(cb)=795.4 k A/m(10.0 k Oe),内禀矫顽力H_(cj)=1901.6 k A/m(23.9 k Oe),最大磁能积(BH)max=217.8 k J/m^3(27.4 MGs Oe)。
The influence of ball - milling time on mean particle size , component and magnetic properties of Sm（Co0.72Fe0.15Cu0.1Zr0.03）7.5 sintered magnets, prepared by Powder Metallurgy , was studied. Mierostructures of Sm （Co0.72Fe0.15Cu0.1Zr0.03）7.5sintered magnets were characterized by scanning electron microscope （SEM）. X -ray photoelectron spectroscopy was used to analyze the component of permanent magnets. The results indicate that the ball - milling time has a great impact on mean particle size, particle size distributions , properties , components and microstructures of Sin （Co0.72Fe0.15Cu0.1Zr0.03）7.5 sintered magnets. The optimum value of Br, Hcb, Hcj and （BH） max of （Co0.72Fe0.15Cu0.1Zr0.03）7.5 sintered magnets with powders ball - milling for 30min and the mean particle size about 5.44 μm can reach 1.08 T （ 10. 8 kGs）, 795.4 kA/m （ 10. 0 kOe）, 1901.6 kA/m （23.9 kOe）, 217. 8 kJ/m3 （27.4 MGsOe） respectively, partly because of less pores in magnet, higher density and less Sm2 03 grains precipitated at the condition.
出处
《稀土》
EI
CAS
CSCD
北大核心
2016年第4期23-28,共6页
Chinese Rare Earths
基金
中国航天科工集团公司自主创新基金(天工技986号)
