组成的影响
(1. 浙江工业大学 应用化学系，杭州 310014；
2. 浙江大学 材料与化工学院，杭州 310027)
摘 要: 研究了Ni、V、Cr、Co、Fe、Cu和Ti等合金化元素取代ZrMn2基Laves相贮氢合金的B侧或A侧对合金相组成的影响。结果表明，采用不同的元素对A侧或B侧进行部分取代，将引起ZrMn2基合金相组成的变化。采用Ni取代Mn后，ZrMn2合金的主相结构转变为C15型Laves相，表明Ni为C15相稳定元素。对Zr-Mn-Ni三元合金，V为C14相稳定元素，而Co、Fe、Cu则为C15相稳定元素。取代量较少时，Cr为C15相稳定元素，取代量增加时，C15相稳定作用减弱。Ti元素为C14相稳定元素，Ti对Zr的部分取代将导致合金主相结构转变为C14型Laves相。合金化元素对ZrMn2合金的相组成的影响与元素的电子浓度和原子尺寸不同有关
关键字: Laves相；贮氢合金；相组成；ZrMn2基
Laves phase hydrogen storage alloys
（1. Department of Applied Chemistry,
Zhejiang University of Technology, Hangzhou 310014, China;
2. College of Materials Science and Chemical Engineering, Zhejiang University, Hangzhou 310027, China）
Abstract:The effect of substitution of Ni,V,Cr,Co,Fe,Cu and Ti element in A or B side on the phase composition of ZrMn2 based Laves phase hydrogen storage alloys were investigated systematically. The results show that the partial substitution in A or B side by various elements will lead to the change of phase composition. The stable major phase is of C15 type Laves phase with the partial substitution of Mn by Ni element, indicating that Ni is C15-stabilized elements. For Zr-Mn-Ni ternary alloy, V is C14-stabilized element,Co,Fe and Cu are C15-stabilized element, Cr is C15-stabilized element when the substitution amount is small. However, the effect of stabilization decreases with the content increasing. Ti is C14-stabilized element, the major phase of ZrMn2 based Laves alloys will be transferred to C14 type Laves phase with the partial substituted of Zr by Ti element. The phase component has a correlation with the atomic radius and electronic concentration of the corresponding substitution element.
Key words: Laves phase; hydrogen storage alloys; phase composition; ZrMn2-based
