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高温稀土永磁Sm2（Co,Cu,Fe,Zr）17的烧结工艺
Investigation on the sintering technology of high temperature rare earth permanent magnets Sm2（Co, Cu, Fe, Zr）17
【摘要】 通过改变烧结工艺制度,制备了高温稀土永磁Sm(CobalFe0.26Cu0.05Zr0.026)7.0,其磁性能和温度系数（β）分别为:Br为1.08T,Hci为2 286 KA/m,Hcb为932 KA/m,（BH）max为220.8 kJ/m3;β为-0.19％/℃。研究表明:提高烧结温度或真空预烧温度都可使材料的性能明显提高,特别是用后者制得的材料拥有较高的矫顽力和低的温度系数,具有较好的高温性能。然而,烧结温度或真空预烧温度过高时,Sm会从基体相中析出,使材料的磁性能降低,而且烧结温度过高还会使晶拉长大,导致材料矫顽力降低。
【Abstract】 The high temperature permanent magnet Sm(Cob（?）lFe0.26Cu0.05Zr0.026)7.0 was produced by altering the simering technology. The properties are: Br 1.08T, Hci 2286 kA/m, Hcb 932 kA/m, （BH）max 220.8 KJ/m3, and β-0.19%/℃. The results show that the magnetic properties are greatly improved when increasing the preosintefing or sintering temperatures. But when the pre-sintering or sintering temperatures are too high, Sm will be separated out from the matrix leading to lower magnetic properties.
【Key words】 high temperature rare earth permanent magnets； temperature； magnetic properties； sinter；
- 【文献出处】 粉末冶金材料科学与工程 ,Materials Science and Engineering of Powder Metallargy , 编辑部邮箱 ,2002年01期
- 【分类号】TM273
- 【被引频次】4
- 【下载频次】81