To investigate the effects of metal fuels on the reactions of ammonium perchlorate(AP)oxidizer in propulsion sys-tems,the energy release processes and reaction characteristics of two aluminum-based metal fuels,namely Al-Li alloy and Al-Mg alloy,were analyzed by TG-DSC,SEM,XRD,and a custom-designed combustion apparatus.The apparent activation en-ergy was calculated by Kissinger method.The results reveals that the Al-Li alloy exhibits inhibitory effects on both the low-tem-perature and high-temperature decomposition stages of AP,which elevates decomposition peak temperatures for both stages.In contrast,the Al-Mg alloy has a strong promoting effect on the low-temperature decomposition stage of AP,lowering the de-composition peak temperature to 287.3 ℃.The addition of Al-Li alloy results in an apparent activation energy of 129.7 kJ/mol for the first decomposition stage of AP and approximately 247.0kJ/mol for the second stage.Conversely,the addition of Al-Mg alloy leads to a negative apparent activation energy(-207.2 kJ/mol)for the first decomposition stage of AP.Additional-ly,in the Al-Mg alloy/AP system,a vigorous decomposition of AP is observed,accompanied by the generation of a prominent gaseous flame during sample combustion.In this process,aluminum and magnesium are nearly fully consumed.However,in the Al-Li alloy/AP system,aluminum is still detected among the combustion products.
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