Grain boundary diffusion of Dy films prepared by magnetron sputtering for sintered Nd-Fe-B magnets

被引：31

作者：

Chen, W. ^{[1
]}

Luo, J. M. ^{[1
]}

Guan, Y. W. ^{[1
]}

Huang, Y. L. ^{[1
]}

Chen, M. ^{[2
]}

Hou, Y. H. ^{[1
]}

机构：

[1] Nanchang Hangkong Univ, Sch Mat Sci & Engn, Nanchang 330063, Jiangxi, Peoples R China

[2] Harvard Univ, Harvard Med Sch, Boston, MA 02138 USA

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2018年 / 51卷 / 18期

基金：

中国国家自然科学基金;

关键词：

magnetron sputtering; Dy films; coercivity; RE-rich phases; RICH PHASE; ELECTROPHORETIC DEPOSITION; COERCIVITY ENHANCEMENT; PERMANENT-MAGNETS; NDFEB MAGNETS; TEMPERATURE; DEPENDENCE; MECHANISM;

D O I：

10.1088/1361-6463/aab912

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Dy films, deposited on the surface of sintered Nd-Fe-B magnets by magnetron sputtering, were employed for grain boundary diffusion source. High coercivity sintered Nd-Fe-B magnets were successfully prepared. Effects of sputtering power and grain boundary diffusion processes (GBDP) on the microstructure and magnetic properties were investigated in detail. The dense and uniform Dy films were beneficial to prepare high coercivity magnets by GBDP. The maximum coercivity value of 1189 kA m(-1) could be shown, which was an amplification of 22.3%, compared with that of as-prepared Nd-Fe-B magnet. Furthermore, the improved remanence and maximum energy product were also achieved through tuning grain boundary diffusion processes. Our results demonstrated that the formation of (Nd, Dy)(2)Fe14B shell surrounding Nd2Fe14B grains and fine, uniform and continuous intergranular RE-rich phases jointly contribute to the improved coercivity.

引用

页数：8

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