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AlN納米粉晶界添加對燒結(jié)Nd-Fe-B磁體耐腐蝕性能的影響
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國家自然科學(xué)基金(50971113)；教育部創(chuàng)新團(tuán)隊發(fā)展計劃(IRT0651)


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

    研究AlN納米粉的晶界添加對燒結(jié)釹鐵硼磁體顯微結(jié)構(gòu)、耐腐蝕性能及磁性能的影響。結(jié)果表明，AlN納米粉的晶界添加可以有效提高磁體的耐腐蝕性能，當(dāng)添加量為0.1%(質(zhì)量分?jǐn)?shù))時，耐腐蝕性能最佳。同時，其添加也可以提高磁體的矯頑力。顯微組織觀察表明，納米AlN的晶界添加有效細(xì)化了磁體主相的晶粒，這是耐腐蝕性能和矯頑力同時提高的主要原因

    Abstract:

    AlN nanopowders were added into Nd28Dy2.4FebalB0.98Al0.1Ga0.1Nb0.1 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 (Hcj) 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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涂少軍,嚴(yán) 密,崔熙貴,倪俊杰,金一彪. AlN納米粉晶界添加對燒結(jié)Nd-Fe-B磁體耐腐蝕性能的影響[J].稀有金屬材料與工程,2010,39(10):1777~1780.[Tu Shaojun, Yan Mi, Cui Xigui, Ni Junjie, Jin Yibiao. Improvement of Corrosion Resistance of Sintered NdFeB Magnets by Intergranular Addition of AlN Nanopowders[J]. Rare Metal Materials and Engineering,2010,39(10):1777~1780.]
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  • 收稿日期:2009-09-25
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