METHOD FOR PREPARING INFILTRATION-COATED COMPOSITE CRACK-RESISTANT TEXTURED SANDWICH CORE COATING LAYER AND COATING USED THEREFOR

摘要

Disclosed is a method for preparing an infiltration-coated composite crack-resistant textured sandwich core coating layer on the surface of an object, the method comprising: coating the surface of an object with a first coating layer; before the first coating layer loses plasticity, attaching a sandwich core with a fibrous texture network to the first coating layer, wherein the sandwich core with a fibrous texture network contains a three-dimensional interpenetrating network structure formed of fibres, and the coating of the first coating layer infiltrates the fibres and seeps into meshes of the three-dimensional interpenetrating network structure; coating same with a second coating layer, and applying pressure to make the coating of the second coating layer infiltrate the fibres in the three-dimensional interpenetrating network structure and seep into the meshes of the three-dimensional interpenetrating network structure; and curing the sandwich core coating layer, wherein during the curing of the second coating layer, the coating on the surface of the meshes of the three-dimensional interpenetrating network structure forms larger recesses inwards, while the coating on the surface of the fibres does not sink or forms smaller recesses due to being blocked by the fibres, thereby forming a texture.