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a=0.3021 am,Laves相含量为25%,晶胞参数为a=0.4920 nm和c=0.7996 nm.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,5 min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.
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