A mathematical calculation of the hydriding characteristics of Mg(2-x)A(x)Ni(1-y)B(y) alloy systems

作者：Li Q; Lin Q; Chou KC^*; Jiang LJ; Xu KD

来源：Journal of Alloys and Compounds, 2005, 397(1-2): 68-73.

DOI：10.1016/j.jallcom.2005.01.036

• hydrogen storage materials
• Mg(2-x)A(x)Ni(1-y)B(y) alloy
• enthalpy of formation
• hydrogen storage capacity
• atomic parameters

Two semi-empirical models have been presented by the stepwise regression method and atomic parameters for the formation enthalpy (Delta H) in the hydriding process and the hydrogen storage capacity (C) Of Mg(2-x)A(x)Ni(1-y)B(y) alloy systems. The main factors influencing Delta H and C are given and we illustrate the relationship between the macroscopic characteristics and atomic structure. In general a decrease in Delta X-2 and an increase in (e/a)(2/3) as well as T will result in an increase of p(eq) and Delta H. On the other hand, when Delta X-2 and T increase but (e/a)(2/3) and Z/R decrease, C will increase. The calculated results by the models presented in this paper are in good agreement with our experimental data, the calculated Delta H and C values were within 6.5 U mol(-1) H and 0.5 mass% H.

• 出版日期2005-7-19
• 单位上海大学; 北京科技大学; 北京有色金属研究总院