rare earth permanent magnets

者:彭龙;杨青慧;张怀武;徐光亮;张明;王敬东;
关键词:rare earth permanent magnets; SmCo alloys; coercivity;

temperature coefficient
单位:State Key Laboratory of Electronic Thin Films and Integrated

Devices  University of Electronic Science and Technology of

China,State Key Laboratory of neodymium prices Electronic Thin Films and

Integrated Devices University of Electronic Science and

Technology of China,State Key Laboratory of Electronic Thin Films

and Integrated Devices University of Electronic Science and

Technology of China,Shcool of Materials Science and Engineering

Southwest University of Science and Technology,Southwest

Institute of Applied Magnetics,Southwest Institute of Applied

Magnetics,,Chengdu 610054,China,Chengdu 610054,China,Chengdu

610054,China,Mianyang 621010 China,Mianyang 621000 China,Mianyang

621000 China
摘要:Sintered Sm(CobalFexCu0.1Zr0.03)7.5 (x=0.09-0.21) permanent

magnets with higher Fe content were found to have higher

remanence Br and maximum energy http://www.999magnet.com/products/142-neodymium-prices product (BH)max at room

temperature. Br and (BH)max reached maximum of 0.96 T and 176.7

kJ/m3, 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, Hci

decreased. 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 Hci reached 0.67 T, 81.2 kJ/m3 and 509.4 kA/m at 500

°C, respectively, showing good high temperature stability, which

could be used in high temperature applications.