Rare earth permanent magnets Sm2(Co,Fe,Cu,Zr)17 for high temperature applications
来源期刊：JOURNAL OF RARE EARTHS2008年第3期
论文作者：WANG Jingdong PENG Long ZHANG Ming XU Guangliang YANG Qiuhui ZHANG Huaiwu
Key words：rare earth permanent magnets; SmCo alloys; coercivity; temperature coefficient;
Abstract: 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 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℃, respectively, showing good high temperature stability, which could be used in high temperature applications.
WANG Jingdong1，PENG Long2，ZHANG Ming1，XU Guangliang3，YANG Qiuhui2，ZHANG Huaiwu2
(1.Southwest Institute of Applied Magnetics, Mianyang 621000, China;
2.State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054,China;
3.Shcool of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China)
Abstract: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 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℃, respectively, showing good high temperature stability, which could be used in high temperature applications.
Key words:rare earth permanent magnets; SmCo alloys; coercivity; temperature coefficient;
【全文内容正在添加中】
