采用机械球磨法制备Mg17Al12合金,系统研究了球磨时间对Mg17Al12形成过程的影响;并以球磨12h的Mg17A112合金为基体,添加5％、10％(质量分数)的Ni、Cu单质,通过机械球磨对合金进行表面复相改性.采用P-C-T测试仪测定合金的储氢性能,研究添加不同质量分数的单质对Mg17Al12合金储氢性能的影响.结果表明:球磨12 h Mg17Al12的吸氢速率较慢,吸氢时间较长,需在1400 min达到最大吸氢量为4.1％(质量分数),接近其理论吸氢量4.4％,Mg17Al12的吸放氢过程是可逆的.Cu对Mg17Al12进行表面复相改性,可以显著改善其吸氢动力学性能,添加5％Cu和10％Cu的合金在623 K,240 min的吸氢量分别为4.07％和3.9％.经过Cu和Ni复相改性后的Mg17Al12具有较好的放氢性能,添加5％Cu合金在553 K放出3％的氢气.Ni对Mg17Al12进行表面复相改性,对其性能有一定的提高,但是和Cu相比,并不明显.
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