钕含量对Mg-Cu-Nd非晶合金贮氢性能的影响

通过溶体快淬成功制备了（Mg65Cu25）100-xNdx（x=2，5，7，10）非晶／纳米晶贮氢合金，利用透射电镜、x射线衍射仪和差热分析仪研究了合金的微观组织结构及其热性能，采用ARBINBTW-2000型电池测试仪研究了合金的贮氢性能。结果表明：随着钕含量的增高，合金的贮氢量呈现上升趋势。非晶（Mg65Cu25）93Nd7合金具有最好的贮氢动力学性能和贮氢容量，最高贮氢量达到3．O％（质量分数），而纳米晶（Mg65Cu25）98Nd2具有最低的贮氢动力学性能和贮氢容量。研究还表明，随着钕含量的增高，合金的非晶形成能力增强，非晶的这种独特的短程有序结构是提高贮氢性能的主要因素。

Effects of Neodymium Content on Hydrogen- Storage Properties of Mg-Cu-Nd Amorphous Alloys

Amorphous and nanocrystalline Mg-based alloys (Mg65Cu25)100-xNdx (x=2,5,7,10) were prepared by melt-spinning. The microstructure of the as-quenched ribbons was characterized and the hydriding properties of these alloys were measured. The experiment results show that the as-quenched amorphous (Mg65Cu25)93Nd7 alloy display the best hydriding properties (hydriding kinetics and hydrogen absorption capacity),its maximum hydrogen capacity is 3.0 wt%H. The nanocrystalline (Mg65Cu25)98Nd2 alloy shows slower hydriding kinetics and lower hydrogen absorption capacity compared to the other Mg-Cu-Nd amorphous alloys. It is conformed that the glass-forming ability becomes strong with the increase of neodymium for the as-quenched (Mg65Cu25)100-xNdx alloys,which leads to the high H-capacity.