Rare earth permanent magnets Sm_2(Co, Fe, Cu, Zr)_17 for high temperature applications  

作　　者：彭龙 杨青慧 张怀武 徐光亮 张明 王敬东 

机构地区：[1]State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China [2]Shcool of Materials Science and Engineering, Southwest University of Science and Technology [3]Southwest Institute of Applied Magnetics

出　　处：《Journal of Rare Earths》2008年第3期378-382,共5页稀土学报（英文版）

基　　金：the National Natural Science Foundation of China (90306015);National Fund for Distinguished Young Scholars of China (60425102)

摘　　要：Sintered Sm（Coba1FexCu0.1Zr0.03）7.5 （x=0.09-0.21） permanent magnets with higher Fe content were found to have higher remanence Br and maximum energy product （BH）max at room temperature. Br and （BH）max reached maximum of 0.96 T and 176.7 kJ/m^3, respectively at room temperature when the Fe content x reached 0.21. However, the intrinsic coercivity Hci at room temperature increased gradually when the Fe content x increased from 0.09 to 0.15, but when x further increased to 0.21, Hcidecreased. Hci attained its peak value of 2276.6 kA/m with Fe content x=0.15 at room temperature. For magnets with x=0.15, Br, （BH）max and Hc1 reached 0.67 T, 81.2 kJ/m^3 and 509.4 kA/m at 500 ℃, respectively, showing good high temperature stability, which could be used in high temperature applications.Sintered Sm（Coba1FexCu0.1Zr0.03）7.5 （x=0.09-0.21） permanent magnets with higher Fe content were found to have higher remanence Br and maximum energy product （BH）max at room temperature. Br and （BH）max reached maximum of 0.96 T and 176.7 kJ/m^3, respectively at room temperature when the Fe content x reached 0.21. However, the intrinsic coercivity Hci at room temperature increased gradually when the Fe content x increased from 0.09 to 0.15, but when x further increased to 0.21, Hcidecreased. Hci attained its peak value of 2276.6 kA/m with Fe content x=0.15 at room temperature. For magnets with x=0.15, Br, （BH）max and Hc1 reached 0.67 T, 81.2 kJ/m^3 and 509.4 kA/m at 500 ℃, respectively, showing good high temperature stability, which could be used in high temperature applications.

关 键 词：rare earth permanent magnets SmCo allovs coercivitv temperature coefficient 

分 类 号：TG146.45[一般工业技术—材料科学与工程]