Mn含量对(V60Ti22.4Cr5.6Fe12)_(100-x)Mn_x(0≤x≤3)合金吸放氢性能的影响  

Effect of Mn Content on Hydrogen Absorption and Desorption Properties of(V60Ti22.4Cr5.6Fe12)_(100-x)Mn_x(0≤x≤3)Alloys

作　　者：罗林山[1] 吴朝玲[1] 陈云贵[1] 杨菲[1] 

机构地区：[1]四川大学,四川成都610064

出　　处：《稀有金属材料与工程》2014年第1期162-165,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)

摘　　要：系统研究了采用FeV80中间合金制备的低成本(V60Ti22.4Cr5.6Fe12)100-x Mnx(0≤x≤3)合金的吸放氢性能及微观组织结构。XRD及PCT测试结果表明,随着Mn含量的增加,合金的晶格常数减小,放氢平台压先升高后降低;吸氢量随Mn含量的增加不断降低,而Mn含量的增加对放氢量没有显著影响。当Mn含量为2.5 at%时,合金室温下的放氢平台压达到最大值0.14 MPa,吸氢量为3.64%(质量分数,下同),放氢量为2.00%。SEM及EDS分析表明,不同Mn含量的合金均由bcc主相、富钛二相及稀土氧化物相组成,且Mn主要存在于合金的bcc主相中,而在富钛二相中分布相对较少。Microstructures and hydrogen absorption and desorption properties of （V60Ti22.4Cr5.6Fe12）100-xMnx（0≤x≤3） alloys made from FeV80 master alloy were investigated systematically. XRD and PCT testing results show that lattice parameter decreases, and plateau pressure increases first and then decreases with the increasing of Mn content. Meanwhile, as the Mn content increases , the hydrogen absorption capacity decreases, but the desorption capacity varies a little .When the Mn content reaches 2.5at%, the plateau pressure of hydrogen desorption reaches a maximum of 0.14 MPa at room temperature, while the hydrogen absorption capacity is 3.64wt% and the hydrogen desorption capacity is 2.00wt%. SEM and EDS analysis show that all of the alloys consist ofbcc main phase, Ti-rich phase and rare earth oxide phase. Mn is mainly distributed in the bcc main phase, and only a small amount of Mn exists in the Ti-rich secondary phase.

关 键 词：BCC 钒基储氢合金 放氢平台压 吸放氢性能 

分 类 号：TG139.7[一般工业技术—材料科学与工程] TG146.413[金属学及工艺—合金]