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研究了机械合金化制备的ＭｍＮｉ５－ｘ（ＣｏＡｌＭｎ）ｘ／Ｍｇ纳米晶复合储氢合金的吸氢特性。通过测定不同镁含量的ＭｍＮｉ５－ｘ（ＣｏＡｌＭｎ）ｘ／Ｍｇ纳米晶复合储氢合金的吸氢ＰＣＴ曲线，考察了镁含量对其吸氢特性的影响。根据对吸氢速度的测定研究了机械合金化对储氢合金的吸氢动力学特性的影响。机械合金化制备的纳米晶复合储氢合金的活化性能与ＭｍＮｉＭ５－ｘ（ＣｏＡｌＭｎ）ｘ铸态合金相比有较大的提高，不需活化或只需一次活化即可吸氢，吸氢量及吸氢的动力学性能与铸态合金相比也有很大的提高。最后对机械合金化形成的纳米晶吸氢特性进行了分析。
The hydrogen absorption properties of MmNi5-x (CoAlMn) x / Mg nanocrystalline composite hydrogen storage alloys prepared by mechanical alloying were investigated. The hydrogen absorption (PCT) curves of MmNi5-x (CoAlMn) x / Mg nanocrystalline composite hydrogen storage alloys with different Mg contents were measured and the effect of magnesium content on hydrogen absorption properties was investigated. The effect of mechanical alloying on the hydrogen absorption kinetics of hydrogen storage alloys was investigated based on the hydrogen absorption rate. Compared with MmNiM5-x (CoAlMn) x as-cast alloy, the activation property of nanocrystalline composite hydrogen storage alloy prepared by mechanical alloying is greatly improved, and the hydrogen absorption capacity, hydrogen absorption capacity, Hydrogen absorption kinetics and casting alloy also has greatly improved. Finally, the mechanical properties of hydrogenation of nanocrystalline alloys were analyzed.