【作者】 田娜； 井晓天； 卢正欣； 陈永刚；

【Author】 TIAN Na;JING Xiao-tian;LU Zheng-xin;CHEN Yong-gang School of Material Science and Engineering., Xi’an University of Technology Xi’an, 710048, China

【机构】 西安理工大学材料科学与工程学院；

【摘要】 系统研究了稀土组元(RE=Ml_αMm_1-α)对RENi₅贮氢合金结构的影响,并预测了该系合金的贮氢性能。结果表明,铸态Ml_αMm_1-αNi₅合金主相为CaCu₅型结构。随α值增大,点阵常数a和晶胞体积V均增大,且V与α呈如下线性关系:V=83.815+1.961α.因此通过改变不同原子半径的稀土元素的含量比例,可调节合金的晶胞体积,从而控制合金的贮氢性能。更多还原

【Abstract】 Against the phase and crystal structure of RENi₅ hydrogen storage alloys, Ml_αMm_1-αNi₅（α=1.0, 0.8, 0.6,0.4, 0.2, 0.0） alloys were systematically investigated and properties of the alloys were forecast. It was found that themain phases of Ml_αMm_1-αNi₅ alloys as cast were hp6-CaCu₅ type structure. The calculation of crystal parametershowed that, with the decrease of the α value, parameter ’a’ and cell volume decreased. The unit cell volume （V） waslinear function to the α value in Ml_αMm_1-αNi₅ alloys, which can be expressed as V=83.815+1.961α. Plateaupressure of the alloys can be adjusted by means of change the ratio of different radium element, which led to thevariation of cell volume.更多还原