Enhanced Thermal Stability of Nd-Fe-B Sintered Magnets by Intergranular Doping Y72Co28 Alloys

被引：30

作者：

Ding, Guangfei ^{[1
,2
]}

Guo, Shuai ^{[1
,2
]}

Cai, Lingwen ^{[1
,2
]}

Chen, Ling ^{[1
,2
]}

Yan, Changjiang ^{[1
,2
]}

Lee, Don ^{[3
]}

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] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Zhejiang Prov Key Lab Magnet Mat & Applicat Techn, Ningbo 315201, Zhejiang, Peoples R China

[3] Univ Dayton, Dayton, OH 45469 USA

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2015年 / 51卷 / 08期

基金：

中国博士后科学基金;

关键词：

Intergranular addition; magnetic properties; microstructure; thermal stability; DY CONTENT; COERCIVITY; DEPENDENCE; ANISOTROPY; MECHANISM; POWDER;

D O I：

10.1109/TMAG.2015.2423652

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

. The intergranular addition process using Y72Co28 eutectic alloy powders has been applied to (Pr, Nd)(27)Dy4Fe67.65Cu0.15Al0.2B1(wt.%) sintered magnets, resulting in an enhanced thermal stability. It was found that the coercivity of magnets at 100 degrees C increased while the addition of Y72Co28 is 1 wt.%, whereas the magnetic properties decreased slightly at room temperature due to lower magnetocrystalline anisotropy field (H-A) of Y2Fe14B. The temperature coefficient of remanence (alpha) and coercivity (beta) for the magnets improved significantly. Microstructure observation indicated that Y atoms prefer to enter into the 2-14-1 phase and form a core-shell structure with an outer layer of (Nd, Dy, Y)(2)(Fe, Co)(14)B. Magnetic domain and intrinsic properties analysis suggested that the improved thermal stability resulted from the modified grain boundaries and the introduction of Y in matrix phases.

引用

页数：4

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