To better understand the reactivity of aluminum-lithium alloy(Al-Li),the oxidation reaction characteristics and ki-netic parameters of aluminum-lithium alloys were analyzed by using TG-DSC.The combustion process and the combustion prod-ucts were analyzed by using a self-designed combustion test device,SEM,XRD,and other equipments.The effects of different oxidizers on the reactivity of the alloys were also compared.Meanwhile,the apparent activation energy of the alloys reaction in air and oxygen were calculated by using the Kissinger,Ozawa,and Friedman methods.The results show that the oxidation of aluminum-lithium alloys occurrs in three stages:the first stage from the beginning up to 800K,the second stage at 800-1 100K,and the third stage is above 1 100K.Compared to ammonium perchlorat(AP),polytetrafluoroethylene(PTFE)can better promote the aluminum-lithium alloys reaction.When the Al-Li/PTFE is heated in air,a vigorous oxidation process is im-mediately observed after aluminum melt.When the Al-Li/PTFE is combusted in air,a larger gas-phase flame and more intense combustion process compared to Al-Li/AP exhibited.The aluminum in the alloy exhibited higher combustion efficiency,leading to more complete reactions.The the apparent activation energies of the alloy calculated by Kissinger method was 335.9 kJ/mol(in air)and 351.3kJ/mol(in oxygen),while the Ozawa method calculated the apparent activation energies of the alloy as 339.9kJ/mol(in air)and 354.6kJ/mol(in oxygen).The apparent activation energies calculated by Friedman method were 343.1 kJ/mol(in air)and 355.4kJ/mol(in oxygen),respectively.
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