Long-term effects of electrochemical corrosion on magnetic properties of sintered NdFeB magnets

被引：19

作者：

Zhang, Kuankuan ^{[1
]}

Fan, Endian ^{[1
]}

He, Jian ^{[2
]}

Li, Xiaogang ^{[1
]}

Huang, Yunhua ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Ctr Corros & Protect, Beijing 100083, Peoples R China

[2] Natl Inst Metrol, Magnet Mat Measurement Lab, Beijing 100029, Peoples R China

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2021年 / 538卷

基金：

中国国家自然科学基金;

关键词：

Sintered NdFeB magnets; Magnetic properties; Electrochemical corrosion; Immersion test; PERMANENT-MAGNETS; RESISTANCE; COERCIVITY; HYDROGEN; DY; IMPROVEMENT; DIFFUSION; VISCOSITY; BEHAVIOR; NB;

D O I：

10.1016/j.jmmm.2021.168309

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Immersion tests and magnetic property measurements were used to study the long-term effects of electrochemical corrosion on the magnetic properties of sintered NdFeB magnets. The results revealed that, during electrochemical corrosion, uneven distribution of the Nd-rich phase caused local lattice expansion in the magnets, in which the priority nucleation of reversal domains occurred. By analyzing the measurement results, about 90% of the remanence (B-r) loss was ascribed to the matrix phase loss, while the remaining 10% was attributed to the deterioration of the surface structure of the magnets during electrochemical corrosion.

引用

页数：8

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