Abstract
Polymer composite materials have rapidly developed due to their unique properties and economic advantages. Despite their prominent physical and mechanical properties, they are unable to meet the higher performance targets in certain exceptional circumstances. Thermal sprayed ceramic/resin composite coating is a feasible solution. Prioritizing the mechanical properties of coating is significant theoretical and scientific value in practical engineering applications. In the article, Al2O3/phenolic resin composite coatings on the textured and sandblasted surface of the glass fiber reinforced polyester are prepared by supersonic plasma spraying. The damage of laser processing periods on resin substrate was discussed. The effect of pit depth and pattern interval on the bonding strength of coating was deeply explored. The results reveal that the highest bonding strength of the coating on textured surface is 28.4 MPa, which is double that of the coating on sandblasted surface. The textured surface can be effectively created with appropriate laser process parameters while avoiding the damage of fiber. On the premise that the glass fiber is not damaged, deeper pits and smaller pattern interval are beneficial for increasing the contact rate between the coating and the substrate. The research provides an effective way to dramatically increase the adhesion of the ceramic/resin composite coating.
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