Corrosion behavior of Nd-Fe-B/α-Fe nanocomposite magnets

被引：11

作者：

Rada, M ^{[1
]}

Lyubina, J ^{[1
]}

Gebert, A ^{[1
]}

Gutfleisch, O ^{[1
]}

Schultz, L ^{[1
]}

机构：

[1] IFW Dresden, Leibniz Inst Solid State & Mat Res, D-01171 Dresden, Germany

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2005年 / 290卷

关键词：

permanent magnets; corrosion; exchange coupling; rare-earth-transition metal cornpounds-remanence;

D O I：

10.1016/j.jmmm.2004.11.415

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

For the fundamental evaluation of corrosion properties of nanocrystalline Nd-Fe-B-based magnets, different phase mixtures with compositions varying from single phase Nd2Fe14B to Nd2Fe14B + 10 wt% Fe, Nd2Fe14B + 25 wt% Fe and Nd2Fe14B + 35 wt% Fe were prepared via intensive ball milling and subsequent hot-pressing. Before and after corrosion measurements. the samples were investigated by means of high-resolution scanning electron microscopy. Potentiodynamic polarisation measurements were performed in 0.5 M phthalate buffer (pH = 5). With increasing α-Fe fraction, a decrease of the corrosion rate is observed as well as improved passivation. © 2004 Elsevier B.V. All rights reserved.

引用

页码：1251 / 1254

页数：4

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