Features of carbon nanotubes deposition on a polymer substrate by cold gas-dynamic spray technique [in English]

Cold gas-dynamic spraying of carbon nanotubes onto polymer substrates is a promising technique for the formation of functional coatings. However, the process of particle deposition on polymer substrates remains insufficiently studied. In this study, a numerical model was developed to analyze the mechanisms of contact interaction between nanotubes and a polyetheretherketone substrate during deposition. The effect of particle velocity on plastic deformation, local heating, and the conditions for nanotube bonding to the polymer substrate has been investigated. The obtained results show the existence of a threshold velocity at which effective mechanical bonding occurs. The conditions for local temperature rise in the substrate, which may promote the formation of a stable nanocomposite coating, have also been analyzed. The proposed model enables the prediction of optimal deposition parameters to ensure high efficiency of nanotube deposition.