Effects of Mg7Zn3 Powders Addition on Corrosion Resistance and Magnetic Properties of Nd-Fe-B Magnets

被引：0
|
作者：
Wu Yeren [1 ]
Ni Junjie [1 ]
Yan Mi [1 ]
机构：
[1] Zhejiang Univ, Dept Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2010年 / 39卷
关键词：
Nd-Fe-B sintered magnets; Mg-Zn alloy; corrosion resistance; magnetic properties; NDFEB; NANOPOWDERS; BEHAVIOR;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Effects of Mg7Zn3 powders addition on the corrosion resistance and magnetic properties of Nd28.0Dy2.2Al0.1Nb0.2B0.96Febal sintered magnets were investigated. The corrosion resistance of Nd-Fe-B magnets was investigated by polarization curves in 3.5 wt% NaCl solution. It was found that corrosion current density i(corr) of the magnet with 0.3 wt% Mg7Zn3 powders decreased from 3.278 mu A/cm(2) to 1.602 mu A/cm(2), exhibiting that magnet had the best corrosion resistance. Meanwhile, magnetic properties of magnets with certain addition amount of Mg7Zn3 powders were improved. The addition of Mg7Zn3 powders enhanced the electrochemical potential of intergranular phase, optimized the distribution of Nd-rich phase and refined grains, resulting in the improvement of both corrosion resistance and magnetic properties.
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页码：487 / 490
页数：4
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