中文摘要：

采用非模型拟合法研究了Mg_（17）Al_（12）储氢合金燃烧合成过程动力学,为今后规模化制备该合金提供理论指导。首先比较不同样品燃烧合成过程热效应及产物相组分,指出压片预处理方法及小尺寸Al粉均有利于促进合金化反应;然后分别采用Kissinger法和Flynn-Wall-Ozawa法计算出该反应活化能分别为140.5和142 k J/mol,对应的最概然机制函数为G（α）=[-ln（1-α）]^1/3,符合Avrami-Erofeev方程的随机成核和随后生长机制。最后通过反应前后期产物相组成分析,揭示该燃烧合成过程中Mg-Al合金化反应机制。

英文摘要：

The kinetics for the combustion synthesis process of Mg_（17）Al_（12） hydrogen storage alloy was investigated using model-free methods,it could provide an important theoretical guidance for the industrial production of the alloy. The effects of different pretreatment methods on the thermal behavior and phase compositions of the products were also investigated. Results showed that the pressed samples with smaller Al particle size were more effective to facilitate the alloying kinetics. The formation activation energies of Mg-Al alloy calculated by Kissinger and Flynn-Wall-Ozawa methods were 140. 5 k J / mol and 142 k J / mol,respectively. The fitted most probable mechanism function for the process G（ α） = [- ln（ 1- α） ]^1 /3,it was in accord with the random nucleation and subsequent growth mechanism of the Avrami-Erofeev equation. And the alloying mechanism of Mg-Al alloy for the combustion synthesis process was revealed by analyzing the phase composition of the products before and after the reaction.