Hydrogen storage properties and structure of La1−Mg (Ni1−Mn )3 intermetallics and their hydrides
作者:R.V. Denys、B. Riabov、V.A. Yartys、R.G. Delaplane、M. Sato
DOI:10.1016/j.jallcom.2006.12.137
日期:2007.10
surroundings, including Ni 4 (2), La 2 Ni 2 (2), La 3 Ni (6), and La 3 Ni 3 (4). Modification of the La-Ni alloys by magnesium and manganese leads to the formation of intermetallic compounds crystallising with the PuNi 3 , CeNi 3 , and Ce 2 Ni 7 -type structures. An ordered substitution of La by Mg in the MgZn 2 -type slabs was observed, causing a complete alteration of the hydrogenation behaviour of the
“混合”RNi 3(R=稀土金属)晶体结构由较简单类型的板坯CaCu 5 和MgZn 2 构成。这些板对氢的不同亲和力导致氢化时RNi 3 和R 2 Ni 7 (R = La, Ce) 结构的异常“各向异性”膨胀。这项工作的重点是研究 LaNi 3 的氢化行为以及经 Mg 和 Mn 改性的 La-Ni 合金的氢化物的性能。LaNi 3 D 2.8 的晶体结构和La 1.5 Mg 0.5 Ni 7 和La(Ni 1-x Mn x ) 3 (x=0; 0.067; 0.133; 0.2; 0.267; 0.3; 0.333; 0.4) 合金是重点。具有PuNi 3 型结构的LaNi 3 氘化导致形成LaNi 3 D 2。8 并伴随着金属基体的变形,导致初始菱形对称性(空间群 R3m)变为单斜对称性(空间群 C2/m;a = 8.6408(7) A, b = 4.9281(4) A , c = 32