摘要
系统研究了(VFe)_(48)Ti_(26)Cr_(26-x)Mo_x(0≤x≤5)合金吸放氢性能及微观组织结构。XRD及PCT测试结果表明,随着Mo含量增加,合金的晶格常数增大,放氢平台压升高,吸放氢量在Mo含量0≤x≤2范围内不出现显著变化,且有效放氢量(质量分数)均能保持在2%以上。当Mo含量为1at%时,合金吸放氢量均达到最大值,吸氢量为3.59%,放氢量为2.08%,室温下的放氢平台压为0.337MPa。SEM与EDS分析表明,不同Mo含量的合金均由bcc主相、Laves相及稀土氧化物相组成,且Mo主要存在于合金的bcc主相中,而在Laves相中分布相对较少。
The microstructure and hydrogen absorption and desorption properties of （VFe）48Ti26Cr26-xMox （0≤x≤5） alloys were investigated. XRD and PCT testing results show that both the lattice constants and plateau pressure increase with the rising of Mo content, and the hydrogen absorption/desorption capacities have no significant change when 0≤x≤2. While the effective desorption capacities maintain more than 2%. When x=1, the alloy shows the maximum hydrogen absorption capacity of 3.59% and the maximum desorption capacity of 2.08%, with a plateau pressure of 0.337 MPa at room temperature. SEM and EDS analyses show that all of the alloys consist of bcc main phase, Laves phase and rare earth oxide phase. Mo mainly distribute in the bcc main phase, and a small amount of Mo exist in the Laves phase.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2013年第2期307-310,共4页
Rare Metal Materials and Engineering
基金
国家"863"项目(2007AA05Z114)
四川省科技支撑计划(07GG002-002)
攀枝花市重点科技项目(2007CY-G-10)
关键词
BCC
钒基储氢合金
吸放氢性能
bcc V-based hydrogen storage alloys hydrogen absorption and desorption properties
