Improvement of Corrosion Resistance of Sintered NdFeB Magnets by Intergranular Addition of AlN Nanopowders

被引：0
|
作者：
Tu Shaojun [1 ]
Yan Mi [1 ]
Cui Xigui [1 ]
Ni Junjie [1 ]
Jin Yibiao [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 / 10期
关键词：
sintered Nd-Fe-B; AlN nanopowders; intrinsic coercivity; corrosion resistance; GRAIN-SIZE; B MAGNETS; FE; ND;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
AlN nanopowders were added into Nd(28)Dy(2.4)Fe(bal)B(0.98)Al(0.1)Ga(0.1)Nb(0.1) sintered magnets as grain boundary modifiers with the aim of improving the corrosion resistance and magnetic properties of the magnets. It is found that the appropriate intergranular addition of AlN nanopowders can improve the corrosion resistance. Optimum corrosion resistance can be obtained when 0.1% (mass fraction) AlN is added. In addition, the intrinsic coercivity (H(cj)) is improved greatly by the AlN addition. Microstructure observation indicates that as AlN nanopowders are added to the intergranular phase, the grains are refined effectively. As a result, both the intrinsic coercivity and corrosion resistance are increased simultaneously.
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页码：1777 / 1780
页数：4
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