高温稀土永磁Sm(Co_(0.72)Fe_(0.15)Cu_(0.10)Zr_(0.03))_(7.5)的制备和性能  

Preparation and properties of high temperature rare earth permanent magnet Sm(Co_(0.72)Fe_(0.15)Cu_(0.10)Zr_(0.03))_(7.5)

作　　者：彭龙[1] 徐光亮[1] 张明[2] 王敬东[2] 

机构地区：[1]西南科技大学材料科学与工程学院,四川绵阳621010 [2]西南应用磁学研究所,四川绵阳621000

出　　处：《粉末冶金技术》2006年第6期437-440,共4页Powder Metallurgy Technology

基　　金：四川省杰出青年基金资助项目(02ZQ026-047);四川省重点科技项目(02GG009-011);四川省应用基础研究项目(05JY029-072)

摘　　要：采用粉末冶金法制备稀土永磁Sm（Co0．72Fe0．15Cu0．10Zr0．03）7．5。结果表明：磁体的密度和各项磁性能都随预烧温度的提高而增加，在1200℃时获得最大值；提高烧结温度有利于提高磁体的密度，但各项磁性能都在1215℃获得最大值；提高固溶温度对磁体的密度和Br的影响不大，但Hcb、Hci和（BH）max都在1185℃时获得最大值。最佳工艺制备的磁体的室温磁性能为：Br=0．94T，Hcb=708．4 kA·m^-1，Hci=2276．6kA·m^-1，（BH）max=171．9kJ·m^-3；500℃时的磁性能为：Br=0．67T，Hcb=429．8kA·m^-1，Hci=509．4kA·m^-1，（BH）max=81．2kJ·m^-3；磁体的温度稳定性良好，内禀矫顽力温度系数β（25～500℃）为一0．16％／℃，工作温度达到533℃。Rare earth permanent magnet Sm（ Co0. 72 Fe0./5 Cu0.10 Zr0.03 ）7.5 was prepared by the conventional powder metallurgy method. The results show that with increasing pre-sintering temperature the densities and magnetic properties increase, and the optimum value of them can be obtained at 1200℃ . With increasing sintering temperature the densities increase but the optimum value of Br, Hcb, Hci and （BH）max can be obtained at 1215℃ . With increasing solution temperature the changes of densities and Br are slight but the optimum value of Hcb, Hci and （BH）max can be obtained at 1185℃ . Br, Hcb, Hci, （BH）max at 25℃ and 500℃ for magnets prepared by optimum process can reach 0.94T, 708.4kA·m^-1 , 2276.6 kA·m^-1, 171.9 kJ·m^-3 and 0.67T, 429.8kA·m^-1, 509.4kA· m^-1, 81.2kJ· m^-3 respectively, and the temperature stability of the magnets is excellent, the temperature coefficient of intrinsic coercivity β （25 - 500℃ ） is - 0.16 %/℃ and operation temperature of 533℃ can be achieved.

关 键 词：2:17型Sm—Co合金 稀土永磁 高温磁体 

分 类 号：TM273[一般工业技术—材料科学与工程]