The agglomeration of aluminum(Al)during the combustion of solid propellant can result in the loss of combustion performance.To mitigate this issue and improve combustion performance,a common approach is to utilize aluminum alloy materials as alternative to metal Al.The advancements in applying aluminum-lithium alloy materials(Al-Li)in solid propellants were re-viewed,encompassing their physical characteristics,thermodynamic properties,combustion mechanisms,and ignition behaviors.Relevant research has found that the introduction of Li into metal Al significantly enhances the permeability of oxygen within the pro-pellant and the reactivity of oxidation reactions,thereby inducing micro-explosion effects and dispersed boiling phenomena,which greatly enrich the combustion behavior.The application of Al-Li in solid propellants not only optimizes the thermal reaction process and improves the stability of ignition and combustion but also modifies the characteristics of oxidation products and enhances the combustion performance of the propellant.However,for better application of Al-Li in solid propellants,further research is needed to investigate the interaction mechanism between agglomerate size and combustion pressure,as well as to enhance the stability and compatibility of Al-Li particles.
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