用两步法(即由机械合金化和压制烧结两个步骤组成)制备了Mg2Ni合金。实验证明： 混合粉经机械合金化后，晶粒细化，增加了固态扩散的能力，有利于固相反应进行，使Mg2Ni产率明显提高。不同温度烧结处理的结果表明：烧结温度是影响Mg2Ni相形成的重要因素，烧结温度达到843K,Mg-Ni粉基本能完全转变为Mg2Ni相。
Mg2Ni alloy was prepared using a two-step process which includes mechanical alloying(MA) and sintering. It is found that the particles of mixed powder of Mg and Ni are fragmented; the grain size of Mg and Ni is greatly reduced and the density of Mg/Ni interface increases by MA; the refining of microstructure enhances the solid-diffusion reaction in sintering and results in the increasing of the ratio of Mg2Ni formed. The results of sintering under different temperatures indicate that the formation of Mg2Ni phase is obviously enhanced with the increasing of temperature，the highest ratio of Mg2Ni forming is reached at 843K.
参考文献
| [1] | Zhu M;Zhu W H;Chung C Y .Microstructure and hydrogen absorption properties of nano-phase composite prepared by mechanical alloying of MmNi5-x(CoAlMn)x and Mg[J].Journal of Alloys and Compounds,1999,293-295:531-545. |
| [2] | 朱文辉;朱敏;罗堪昌 et al.高能球磨在MmNi5-x(Co,Al,Mn)x/Mg体系中诱导的固态反应及纳米相复合储氢合金的形成[J].金属学报,1999,35(05):541-545. |
| [3] | 王仲民,彭成红,李祖鑫,朱敏.Mg-Ni系储氢合金电极研究最新进展[J].电池,2000(06):266-268. |
| [4] | Nam H G;Jung H W;Kyung S L .Mechansim of rapid degradation of nanostructured Mg2Ni hydrogen storage alloy electrode synthesized by mechanical alloying and the effect of mechanically coating with nickel[J].Journal of Alloys and Compounds,1999,288:286-293. |
| [5] | D.Sun;H.Enoki .New approach for synthesizing Mg-based alloys[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,1999(1/2):279-283. |
| [6] | Zaluski L;Zaluska A .Hydrogen absorption in nanocrystalline Mg2Ni formed by mechanical alloying[J].Journal of Alloys and Compounds,1995,217:245-249. |
| [7] | Aymard L;Ichitsubo M .Preparation of Mg2Ni based by the combination of mechanical alloying and heat treatment at low temperature[J].Journal of Alloys and Compounds,1997,259:L5-L8. |
| [8] | MAN C H;Zhu M;Chung C Y.Effect of mechanical alloying on the solid state reaction process of Ni-36.5at%Al alloy[M].Intermetallics (to be published |
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