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中文摘要：
采用干磨和湿磨两种高能球磨工艺制备了AB5型Ml（NiCoMnAl）_5纳米储氢合金;采用X射线衍射仪对其进行了结构表征,并用气体反应装置进行了储氢性能试验,研究了纳米化对其储氢性能的影响。结果表明：用两种方法经过4 h的球磨后,合金的晶粒尺寸都减小到20 nm以下,并且湿磨使晶粒尺寸的减小比干磨的快,而湿磨使晶格畸变的增加比干磨的小;球磨时间相同时,湿磨合金粉的晶格畸变比干磨的更小;高能球磨导致的晶粒纳米化以及晶格畸变增大使合金的储氢容量减少,并使合金PCI曲线上吸/脱氢压力平台倾斜;除晶粒尺寸外,晶格畸变对纳米储氢合金的储氢性能有明显的影响,随晶格畸变的增大,其储氢容量有减小的趋势。
英文摘要：
The dry and wet high-energy milling had been applied to prepared AB5 type Ml（NiCoMnAl）5 nano hydrogen storage alloy.X-ray diffraction was used to characterize the structure of the alloy and gas reaction controller was used to perform the hydrogen storage properties test.The effect of nanostructure on the hydrogen storage properties was analyzed.The result show that both the methods could make the grain size of the alloy reduce to less than 20 nm after milling for 4 h,and the decrease of the grain size by wet milling was faster than that by dry milling.Furthermore,the increase of the lattice defect of the alloy by wet milling was less than that by dry milling.The alloy powders after wet milling had significantly less lattice defect than that of after dry milling in the same time.Nanostructure and the increase of lattice defect by high energy ball milling led to the decrease of hydrogen storage capacity,and the slope of pressure-composition-isotherm（PCI）of hydriding and dehydriding pressure platform of the alloy.In addition to grain size,the lattice defect of the alloy had a significant impact on hydrogen storage properties.With the increase of the lattice defect,the hydrogen storage capacity of the alloy reduced.
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