Abstract
Despite in-depth investigations on the chemical reaction mechanism of Al/PTFE (aluminum/polytetrafluoroethylene), the research on the heat and mass transfer process of the Al/PTFE material itself is still lacking. Based on the previous study on the reaction mechanism of Al/PTFE, this paper theoretically analyzes and summarizes the dynamic multi-physical processes between the laser-Al/PTFE interactions. With the theoretical analysis and some hypotheses, a mathematical model, which considers the phase transition, moving recessive interface, thermal decomposition, chemical reactions, laser heat conduction, and the target material's temperature-dependent material and optical properties, is established in the one-dimensional domain to capture the dynamic interaction between laser and Al/PTFE. The robust coupling scheme utilized in the model enables us to track the moving interface recession, and predict the temperature distributions and ablation zone profiles. The proposed model has been validated by comparing the predictions of the ablation depths with those obtained using other simplified models and experimental results.
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