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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3.0%(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。
The (Mg65Cu25) 100-xNdx (x = 2,5,7,10) amorphous / nanocrystalline hydrogen storage alloys were successfully prepared by melt quenching. The properties of the alloys were investigated by transmission electron microscopy, X-ray diffraction and differential thermal analysis Microstructure and thermal properties of the alloy were studied by using the ARBINBTW-2000 battery tester. The results show that with the increase of neodymium content, the hydrogen storage capacity of the alloy shows an upward trend. The amorphous alloy (Mg65Cu25) 93Nd7 has the best hydrogen storage kinetics and hydrogen storage capacity with the highest hydrogen storage capacity of 3.0% (mass fraction), while the nanocrystalline Mg65Cu25 98Nd2 has the lowest hydrogen storage kinetics and storage Hydrogen capacity. The study also shows that with the increase of neodymium content, the amorphous alloy has an enhanced amorphous formation ability. This unique short-range ordered structure is the main factor to improve the hydrogen storage performance.