Coercivity enhancement of Ce-Fe-B sintered magnets by low-melting point intergranular additive

被引：27

作者：

Chen Kan ^{[1
,2
]}

Guo Shuai ^{[1
,2
]}

Fan Xiaodong ^{[1
,3
]}

Ding Guangfei ^{[1
,2
]}

Chen Ling ^{[1
]}

Chen Renjie ^{[1
,2
]}

Lee Don ^{[1
,2
]}

Yan Aru ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Key Lab Magnet Mat & Devices, Ningbo 315201, Zhejiang, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Xian Univ Technol, Sch Mat Sci & Engn, Xian 710000, Peoples R China

来源：

JOURNAL OF RARE EARTHS | 2017年 / 35卷 / 02期

关键词：

Ce-Fe-B; microstructure; intergranular additive; rare earths; PERMANENT-MAGNETS; HEAT-TREATMENT; IMPROVEMENT; ALLOY; MICROSTRUCTURE; SUBSTITUTION; ENERGY; CU;

D O I：

10.1016/S1002-0721(17)60894-9

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Ce-Fe-B sintered magnets with enhanced coercivity were prepared by the powder metallurgy method. The mechanism of the coercivity enhancement in Ce-Fe-B sintered magnets with the low-melting point intergranular additive was discussed in details. It was speculated that the low coercivity of Ce-Fe-B sintered magnet was related to the irregular sharps and relatively low magneto-anisotropy field of the matrix phase. After introducing a 20 wt.% Nd-based intergranular additive, the coercivity markedly increased from 108 Oe to 2560 Oe due to the formation of thin and continuous grain boundary layers and the surface modification of the matrix phase grains. Additionally, the formation of the high anisotropy field (Nd,Ce)(2)Fe14B shell was beneficial to the increase of the coercivity as well. This work suggested that adding low-melting point intergranular additives was effective to fabricate the practical Ce-Fe-B sintered magnets.

引用

页码：158 / 163

页数：6

共 24 条

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