Microstructure analysis of sintered Nd-Fe-B magnets improved by Tb-vapor sorption

被引：79

作者：

Watanabe, Natsuki ^{[1
]}

Itakura, Masaru

Kuwano, Noriyuki

Li, Deshan

Suzuki, Shunji

Machida, Ken-ich

机构：

[1] Kyushu Univ, Dept Appl Sci Elect & Mat, Kasuga, Fukuoka 8168580, Japan

[2] Kyushu Univ, Art Sci & Technol Ctr Cooperat Res, Kasuga, Fukuoka 8168580, Japan

[3] Osaka Univ, Ctr Adv Sci & Innovat, Suita, Osaka 5650871, Japan

来源：

MATERIALS TRANSACTIONS | 2007年 / 48卷 / 05期

关键词：

grain boundary; coercivity; permanent magnet; neodymium-iron-boron sintered magnet; microstructure; terbium; transmission electron microscopy (TEM); energy dispersive spectroscopy (EDS); electron energy loss spectroscopy (EELS);

D O I：

10.2320/matertrans.48.915

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The surface treatment with Tb-vapor sorption improves the magnetic properties of small-sized magnets. Microstructure of the Tb-treated magnets was investigated by transmission electron microscopy (TEM). By applying the Tb-treatment, the diffusion of Tb through grain boundaries occurred even inside the magnets, and then a thin and continuous wetting-layer phase was formed at the boundaries between the Nd2Fe14B grains. The results suggest that the formation of the thin and continuous wetting-layer phase leads to the improvement in magnetic properties.

引用

页码：915 / 918

页数：4

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