中国有色金属学报
2003年4月      (总第53)       第13卷第2


 
文章编号:1004-0609(2003)02-0414-05

合金成分对Pr2Fe14B/α-Fe纳米复合永磁材料组织与
磁性的影响

包小倩, 周寿增, 王佐诚, 张茂才, 乔 祎, 刘湘华
(北京科技大学 新金属材料国家重点实验室, 北京100083)

摘 要:XRD TEM Mossbauer谱和VSM等实验方法, 研究了不同Pr含量、 B含量和Cu含量的Pr2Fe14B/α-Fe型纳米复合快淬带的显微结构与磁性。 结果表明: PrxFe94-xB6合金在x=8α-Fe体积分数约30%)时磁性能最佳, Br=1.29T, Hci=461.7kA/m, (BH)max=165.6kJ/m3 
Pr8.5(Fe0.8Co0.2)86.5-xCuxB5
合金在x=0.5时获得最佳的磁性能; 随B含量增加, B相在晶界分布
Pr8Fe92-xBx
交换耦合减弱, 磁性能单调下降。 

关键词: 纳米复合永磁; 熔体快淬; 磁性能
中图分类号
: TM274 TG132.2
文献标识码: A

基金项目:国家自然科学基金资助项目(10074005
收稿日期
: 2002-06-17; 修订日期:2002-08-28
作者简介: 包小倩(1974-, , 助教, 硕士.
通讯联系人: 包小倩, 女, 硕士; Tel: +86-10-62332508 E-mail: bxq6118@sina.com

 

Influence of compositions on microstructure and magnetic properties of nanocomposite Pr2Fe14B/α-Fe permanent alloys

BAO Xiao-qian, ZHOU Shou-zeng, WANG Zuo-cheng, 
ZHANG Mao-cai, QIAO Yi, LIU Xiang-hua
(State Key Laboratory for Advanced Metals and Materials, 
University of Science and Technology Beijing, Beijing 100083, China)

Abstract: Microstructure and magnetic properties of nanocomposite Pr2Fe14B/α-Fe ribbons with different Pr, B and Cu contents, prepared by melt-spinning or subsequent annealing were investigated by the methods of XRD, TEM, Mossbauer and VSM. As a result, the excellent magnetic properties with Br=1.29T, Hci461.7kA/m, (BH)max=165.6kJ/m3 are obtained in PrxFe94-xB6 ribbons with x=8. High performance is also achieved in Pr8.5(Fe0.8Co0.2)86.5-xCuxB5 ribbons with x=0.5. As the content of B in Pr8Fe92-xBx ribbons increases, the distribution of B-rich phases at intergranular regions results in the weakening of exchange coupling and the decreasing of magnetic properties.

Key words:nanocomposite permanent magnets melt-spinning 
magnetic properties