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(V30Ti35Cr25Fe10)97.5Si2.5合金的结构与吸放氢性能
引用本文:严义刚 陈云贵 周潇潇 梁浩. (V30Ti35Cr25Fe10)97.5Si2.5合金的结构与吸放氢性能[J]. 稀有金属材料与工程, 2007, 36(5): 799-802
作者姓名:严义刚 陈云贵 周潇潇 梁浩
作者单位:四川大学,四川,成都,610064
基金项目:攀枝花科技局重点攻关项目
摘    要:采用XRD,SEM和PCT测试研究了(V30Ti35Cr25Fe10)97.5Si2.5(at%)合金的组织结构与吸放氢性能。结果表明:合金由BCC相和C14 Laves相组成,BCC相含量为75%,晶胞参数为α=0.3021nm,Laves相含量为25%,晶胞参数为α=0.4920nm和c=0.7996nm。由于含有大量的Laves相,合金具有良好的活化性能,室温下不需孕育期就可以快速吸氢,5min内达到吸氢饱和状态,饱和吸氢量达到2.98%(质量分数,下同)。在一定氢压下,合金的容量可由合金中BCC相和Laves相的容量按组分的含量进行线性组合而成。

关 键 词:贮氢合金  钒基固溶体  BCC相  C14 Laves相
文章编号:1002-185X(2007)05-0799-04
修稿时间:2006-03-10

Structure and HydrogenAbsorption and Desorption Properties of (V30Ti35Cr25Fe10)97.5Si2.5 Alloy
Yan Yigang,Chen Yungui,Zhou Xiaoxiao,Liang Hao. Structure and HydrogenAbsorption and Desorption Properties of (V30Ti35Cr25Fe10)97.5Si2.5 Alloy[J]. Rare Metal Materials and Engineering, 2007, 36(5): 799-802
Authors:Yan Yigang  Chen Yungui  Zhou Xiaoxiao  Liang Hao
Affiliation:Sichuan University, Chengdu 610064, China
Abstract:The microstructure and hydrogen absorption and desorption properties of (V30Ti35Cr25Fe10)97.5Si2.5 alloy consisting of 75% BCC phase and 25% C14 Laves phase were investigated by X-ray, SEM and PCT measurement in this paper. The lattice parameters of BCC phase and Laves phase are 0.3021 nm (a), as well as 0.4920 nm (a) and 0.7996 nm (c), respectively. The alloy shows a good activation performance with a saturated hydrogen absorption amount up to 2.98 wt% within 5 min, and reacts with hydrogen immediately at room temperature duo to the large amount of Laves phase. The capacity of (V30Ti35Cr25Fe10)97.5Si2.5 at a given pressure agrees with the one calculated by the linear combination of its constituent phase.
Keywords:hydrogen storage alloy   V-based solid solution   BCC phase   C 14 Laves phase
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