高温Sm(Co,Fe,Cu,Zr)_z永磁体的设计原则  

Design principles of high temperature Sm(Co,Fe,Cu,Zr)_z permanent magnets

作　　者：彭元东[1] 易健宏[1] 李丽娅[1] 李云卿[2] 杜娟[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083 [2]北京有色金属研究总院,北京100088

出　　处：《中南工业大学学报》2002年第1期60-62,共3页Journal of Central South University of Technology(Natural Science)

基　　金：教育部高等学校骨干教师研究计划项目

摘　　要：为了提出制造具有较高的最高使用温度的高温Sm(Co,Fe ,Cu ,Zr) z 永磁体的设计要求 ,根据最高使用温度公式中影响TMO的Hci,TR及 β值 ,提出了高温Sm(Co ,Fe ,Cu ,Zr) z 永磁体的成分设计要求为∶Cu含量高 ,Fe含量低 ,Zr含量适当 ,z值小 .用粉末冶金方法分别制造了 4种成分不同的合金 .其中 :Cu含量高、Fe含量低、Zr含量适当、z值小的C样品Sm(CobalFe0 .1Cu0 .0 8Zr0 .0 3) 7永磁体的室温内禀矫顽力Hci为 183 0 .8kA/m ,温度系数 β( 2 0～ 2 0 0℃ )为- 0 .2 0 % /℃ ,估算其使用温度能超过 4 0 0℃ ;Fe含量高 ,Cu含量低 ,z值大的B样品Sm(CobalFe0 .2 Cu0 .0 6 Zr0 .0 2 ) 8.5永磁体的Hci为 2 3 88kA/m ,β为 - 0 .3 3 % /℃ ( 2 0～ 2 0 0℃ ) ,其tMO仅为 2 70℃ ;而A ,D样品的性能及使用温度介于B与C之间 .实验结果表明 ,Cu含量高、Fe含量低、Zr含量适当、z值小是制造高温Sm(Co,Fe ,Cu ,Zr) z 永磁体的必要条件 .为制造高温Sm(Co,Fe ,Cu ,Zr) zOn the base of the formula of maximum operated temperature, the design requirements of high temperature Sm(Co,Fe,Cu,Zr) z permanent magnets with high Cu, low Fe, fit Zr, little z were listed. Four sintered products were manufactured to test the idea. The experimental results showed that sample C Sm(Co bal Fe 0.1 Cu 0.08 Zr 0.03 ) 7 permanent magnets with high Cu, low Fe, fit Zr, little z had room temperature intrinsic coercivity H ci 1?830.8 kA/m, temperature coefficient of coercivity β (20～200 ℃)=-0.20%/℃ and was estimated maximum operated temperature over 400 ℃; the sample B Sm(Co bal Fe 0.2 Cu 0.06 Zr 0.02 ) 8.5 permanent magnets with high Fe, low Cu, fit Zr, high z had room temperature intrinsic coercivity H ci 2?388 kA/m, temperature coefficient of coercivity β (20～200 ℃)=-0.33%/℃ and maximum operated temperature 270 ℃; the properties and maximum operated temperatures of samples A and D were between B and C. It indicated that high Cu, low Fe, fit Zr, and little z were needed for manufacturing high temperature Sm(Co,Fe,Cu,Zr) z magnets. It has provided guiding reference for manufacturing high temperature Sm(Co,Fe,Cu,Zr) z magnets.

关 键 词：高温Sm(Co Fe Cu Zr)z永磁体 内禀顽力 矫顽力温度系数 

分 类 号：TM273[一般工业技术—材料科学与工程]