摘要
研究了V(30%)-Ti(15%~55%)-Cr(7%~43%)-Fe(2%~18%)(原子分数,下同)四元合金的储氢性能。结果表明:V-Ti-Cr-Fe四元合金的吸氢量与有效吸氢量主要由Ti/(Cr+Fe)比决定,当Ti/(Cr+Fe)=1时,合金具有最好的吸放氢性能。随着Ti/(Cr+Fe)比升高,合金的晶格常数增大,氢化物的生成焓增大,放氢平台压力降低。在298K时,V30Ti35Cr25Fe10合金的吸氢量达到3.6%(质量分数,下同),有效吸氢量达到2.0%。
The hydrogen storage properties of V-Ti-Cr-Fe alloys with compositions of V(30 at%)-Ti(15 at%~55 at%)-Cr(7 at%~43 at%)- Fe(2 at%~18 at%) were studied in this paper. It is found that the hydrogen absorption capacities and the effective hydrogen capacities of the alloys are largely dependent on the Ti/(Cr+Fe) ratio. The alloy shows the largest effective hydrogen capacity at a Ti/(Cr+Fe) ratio of 1.0. With the increase of Ti/(Cr+Fe) ratio (0.9~1.05), the lattice parameters of the alloys and the enthalpy of hydrides grow, and the hydrogep desorbing plateau pressure declines. The alloy of V30Ti35Cr25Fe10 with 10at% Fe exhibits a hydrogen capacity of 3.6wt% and an effective hydrogen capacity of 2.0wt% at 298 K.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2006年第5期686-689,共4页
Rare Metal Materials and Engineering
基金
攀枝花市科技局重点科技攻关项目(GX2003-1)
关键词
储氢合金
V-Ti基固溶体
BCC
储氢性能
hydrogen storage alloy
V-based solid solution
bcc
hydrogen storage properties
作者简介
严义刚,男,1980年生,博士研究生,四川大学材料学院,四川成都610065,电话:028-85407335,E-mail:yyigang@tom.com