This paper presents the results of a numerical study of cluster growth in a high-temperature steam-gas flow under radiative cooling. Since the steam supersaturation increases rapidly after radiative cooling, cluster growth occurs rapidly. This article demonstrates that at a distance of less than 10 μm from the nozzle exit, the cluster radius increases to 3 nm. Although the radiative cooling of the jet continues further, the cluster growth stops due to the complete condensation of the vapor. It is also shown that at a relatively low cluster density, their radii increase significantly in supersaturated vapor.
We present the experimental results on electron-beam deposition of Y2O3-stabilized zirconium dioxide ceramic coatings using a fore vacuum plasma-cathode electron source. The influence of the substrate roughness on the structure and roughness of the coating was evaluated. It was found that, at the roughness of the substrate Ra 1.96-0.21 microns, the coatings have the best adhesive properties. Coatings are subject to destruction due to inelastic deformation and mechanical coupling with the substrate.
