高温稀土永磁Sm_2(Co,Cu,Fe,Zr)_(17)的烧结工艺  

Investigation on the sintering technology of high temperature rare earth permanent magnets Sm_2(Co, Cu, Fe, Zr)_(17)

作　　者：李丽娅[1] 易建宏[1] 曾庆灵[1] 付应生[1] 

机构地区：[1]粉末冶金国家重点实验室,长沙410083

出　　处：《粉末冶金材料科学与工程》2002年第1期62-66,共5页Materials Science and Engineering of Powder Metallurgy

基　　金：教育部高等学校骨干教师研究计划资助项目

摘　　要：通过改变烧结工艺制度,制备了高温稀土永磁Sm(Co_(bal)Fe_(0.26)Cu_(0.05)Zr_(0.026))_(7.0),其磁性能和温度系数(β)分别为:B_r为1.08T,H_(ci)为2 286 KA/m,H_(cb)为932 KA/m,(BH)_(max)为220.8 kJ/m^3;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。The high temperature permanent magnet Sm(Co_(b(?)l)Fe_(0.26)Cu_(0.05)Zr_(0.026))_(7.0) was produced by altering the simering technology. The properties are: B_r 1.08T, H_(ci) 2286 kA/m, H_(cb) 932 kA/m, (BH)_(max) 220.8 KJ/m^3, 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.

关 键 词：高温稀土永磁 温度 磁性能 烧结 

分 类 号：TM273[一般工业技术—材料科学与工程]