快凝条件下稀土贮氢合金的晶体学性质  

The Crystallographic Properties of Rare-earth-based Hydrogen Storage Alloys Prepared by Repid Solidification

作　　者：王超群[1] 靳红梅[1] 蒋利军[1] 李国动 王瑞坤[1] 

机构地区：[1]北京有色金属研究总院,北京100088

出　　处：《物理测试》1998年第1期1-4,共4页Physics Examination and Testing

基　　金：国家自然科学基金

摘　　要：快凝技术是近年发展起来的,用于改善贮氢合金电极性能的一种新工艺。利用该法制备的稀土贮氢合金电极材料具有柱状晶结构,晶体择优生长,并产生各向异性变形晶体点阵以及原子有序变化等晶体学特性。 本文根据X射线衍射分析的结果,探讨这些晶体学性质在晶粒细化以及电化学性能研究中的作用,为进一步提高合金电极性能提供理论依据。Crystallographic properties of RE based hydrogen storage alloys prepared by rapid solidification have been studied. The results shawed that the main characterics are a columnar. Structure was formed so that the c axis of the hexagonal stucture was oriented parallel to the cooling plane, and the anisotropically deformed crystal lattices resulting from the excess of B-elemeats incorporated in the HP6-CaCu5 type structure. The rapid quenching may depresss chemical inhomogeneity and bring about changes in atomic order,resulting in an improvement in electrode durability.

关 键 词：稀土贮氢合金 晶体学性质 快速凝固 

分 类 号：TG139.7[一般工业技术—材料科学与工程]