Effects of Al partial substitution for Ni on properties of LaNi5-xAlx

摘要：

The hydrogen storage properties of four LaNi5.xAlx (x = 0.25,0.50,0.75,1.00) pseudobinary alloys were systematically studied.The characteristics of microstructure before and after hydrogenation,activation,kinetics and thermodynamics properties,as well the anti-combustibility properties of the four pseudobinary alloys were investigated.The results reveal that the alloys have excellent activation properties and kinetics properties.X-ray diffraction analysis of crystal lattice of the alloys show that the crystal structures of alloys do not change with the addition of Al in the range of 0≤x≤1,but the lattice constants slightly increase.It is found by measuring thermodynamic properties of the alloy-H2 systems that with increasing x value the equilibrium pressure,hydrogen-absorbing ability and hysteresis decrease,whereas the absolute value of the enthalpy increases.It is also found that the hydrogen absorbing velocity of the alloys decreases with increasing x value.

关键词： hydrogen storage LaNi5-xAlx alloy kinetics property thermodynamics property crystal lattice parameter

作者: CAO Da-li CHENG Hong-hui MA Lei CHEN De-min Lü Man-qi YANG Ke

作者单位: School of Materials Science and Engineering,Shenyang Institute of Chemical Technology,Shenyang 11014 Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China

会议类型: 国际会议

会议名称: 2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)

会议地点: 长沙

会议语种:英文

在线出版日期: 2007-11-28（万方平台首次上网日期，不代表论文的发表时间）