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:用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=8(α-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,
富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-),
女,
助教,
硕士.
通讯联系人:
包小倩, 女, 硕士; Tel: +86-10-62332508;
E-mail: bxq6118@sina.com
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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
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