ZrFe_(1.95-x)Mn_xV_(0.10)(x=0,0.05,0.10,0.15)合金的储氢性能研究  

Hydrogen Storage Properties of ZrFe_(1.95- x)Mn_xV_(0. 10)( x =0,0.05,0.10,0.15) Alloys

作　　者：涂有龙 蒋利军[1] 郭秀梅[1] 简良 赵汪 武媛方 

机构地区：[1]北京有色金属研究总院能源材料与技术研究所,北京100088

出　　处：《稀有金属》2014年第4期629-634,共6页Chinese Journal of Rare Metals

基　　金：国家科技部高技术研究发展计划(863计划)项目(2012AA051503)资助

摘　　要：利用磁悬浮感应熔炼法制备了ZrFe1.95-xMnxV0.10(x=0,0.05,0.10,0.15)高坪台压储氢合金。采用X射线衍射分析(XRD)、扫描电子显微镜(SEM)和Sievert's体积法研究了Mn部分取代Fe对ZrFe1.95V0.10合金的相结构、吸/放氢PCT性能及吸氢动力学性能的影响。XRD结果表明,当x≤0.10时合金均为C15型立方Laves单相结构,且随着Mn含量的增加,晶格常数逐渐增大;当x=0.15时合金中出现C14型六方Laves第二相,晶格常数略有降低;随着Mn取代量的增加,合金的活化性能改善,滞后系数降低,但坪台斜率增大,放氢坪台压由2.27MPa降至1.12 MPa(243 K下),储氢容量先增后减,在243 K下ZrFe1.85Mn0.10V0.10合金具有最大的储氢容量1.69%(n(H)/n(M)=1.13)及最快的吸氢速率t0.9为46 s。The as-cast ZrFe1.95-xMn, V0. 10 （x = 0, 0.05, 0.10, 0.15） high pressure hydrogen storage alloys were prepared by vacuum induction levitation melting method. The crystal structures, absorptiorx/desorption PCT isotherms and hydrogen absorption kinetics of the ZrFe1.95V0. 10 alloy with Fe partially replaced by Mn were investigated systematically by X-ray diffraction （XRD）, scanning electronic microscope （SEM） and Sievert＇s volumetric method. XRD patterns revealed that all samples had single C15 type Laves phase and the lattice constants increased with the increase of Mn content when x ≤ 0. 10. ZrFe1.8 Mn0.15 V0.10 alloy possessed a second new phase with C14 type hexagonal structure and its lattice constant was less than that of ZrFe1.85 Mn0. 10V0. 10 alloy. With the increase of Mn content, the hysteresis alleviated and the activation time reduced while the plateau slopes increased slightly and the equilibrium desorption plateau pressures decreased from 2.27 to 1.12 MPa. In addition, the hydrogen intake capacity first increased and then decreased. ZrFe1. 85 Mn0. 10 V0. 10 alloy had the maximum hydrogen intake capacity of 1.69% （n （H）/n （M） = 1.13 ） and the highest absorption rates of to.9 =46 s among these alloys at 243 K.

关 键 词：储氢合金 C15型Laves相 PCT曲线 吸氢动力学 

分 类 号：TG139.7[一般工业技术—材料科学与工程]