Model for hydrogen desorption plateau pressure of AB2 type-Tix(CrFeMn)2 alloys

Abstract

The semi-empirical model for predicting the hydrogen desorption enthalpy and plateau pressure of AB2 type-Tix(CrFeMn)2 Alloys is established by MATLAB soft in the method of linear-interaction. Through the significance testing analysis, it indicates that the factor order of the influence on the hydrogen desorption plateau pressure is T>δ2 > Z/R>(Δn)2/3 >(ΔX)2. Due to its negative and positive coefficients, the effects of (ΔX)2, δ2, (Δn)2/3 on the desorption plateau pressure and enthalpy are negative, and Z/R effect is positive. The relative error of ΔH was less than 3.7% in the choose database which is more accuracy than previous model of AB2. The calculated desorption plateau pressures by the model are agreed with our experimental data very good in the most experiment. The difference of ΔH calculated by the model and fitting experimental data were not more than 4 kJ/(mol H2). The model can be used to save cost and development time through predicting the hydrogen desorption plateau pressure of different composition alloys.