In-Situ Synthesis of AlN Powders and Composite AlN Powders with Yttrium Addition
来源期刊：JOURNAL OF RARE EARTHS2002年第3期
论文作者：周美玲 李春国 林志浪 郑新和 王群
Key words：rare earths; alloys; in-situ synthesis; AlN powders; composite AlN powders;
Abstract: Using Al-Mg and Al-Mg-Y alloys as raw materials and nitrogen as gas reactants, AlN powders and composite AlN powders by in-situ synthesis method were prepared. AlN lumps prepared by the nitriding of Al-Mg and Al-Mg-Y alloys have porous microstructure, which is favorable for pulverization. They have high purity, containing 1.23%(mass fraction) oxygen impurity, and consisted of AlN single phase. The average particle size of AlN powders is 6.78 μm. Composite AlN powders consist of AlN phases and rare earth oxide Y2O3 phase. The distribution of particle size of AlN powders shows two peaks. In view of packing factor, AlN powders with such size distribution can easily be sintered to high density.
周美玲1，李春国2，林志浪1，郑新和3，王群1
(1.School of Material Sciences and Engineering, Beijing Polytechnic University, Beijing 100023, China;
2.Huludao Zinc Factory, Huludao 130025, China;
3.Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China)
Abstract:Using Al-Mg and Al-Mg-Y alloys as raw materials and nitrogen as gas reactants, AlN powders and composite AlN powders by in-situ synthesis method were prepared. AlN lumps prepared by the nitriding of Al-Mg and Al-Mg-Y alloys have porous microstructure, which is favorable for pulverization. They have high purity, containing 1.23%(mass fraction) oxygen impurity, and consisted of AlN single phase. The average particle size of AlN powders is 6.78 μm. Composite AlN powders consist of AlN phases and rare earth oxide Y2O3 phase. The distribution of particle size of AlN powders shows two peaks. In view of packing factor, AlN powders with such size distribution can easily be sintered to high density.
Key words:rare earths; alloys; in-situ synthesis; AlN powders; composite AlN powders;
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