Abstract: A durable ceramic and metallic coating has been applied to ceramic tiles to protect the tiles while undergoing a molten metal casting operation. The plasma sprayed coating consists of a ceramic top coat layer of aluminum oxide, zirconium oxide, or other oxides with or without a metallic bond coat layer and with or without a functionally gradient coating. This coating protects the underlying ceramic tile, which is composed of boron carbide, silicon carbide, alumina (Al2O3) or other type of hard ceramic, from reacting chemically with the molten metal. The molten metal is cast around the ceramic tiles to create a lattice of ceramic tiles that are used for protection from projectiles and shrapnel.

Abstract: A method is disclosed for applying a vibration-damping surface to an article. The method includes providing a coating material comprising a ceramic, metallic or cermet material and a viscoelastic glass frit and plasma spraying the coating material onto an article. The coating material forms a plurality of ceramic, metallic or cermet microstructures having voids with the viscoelastic glass frit distributed to interact with the voids to provide vibration damping. Also disclosed are plasma spray coatings for damping vibrations that includes a ceramic-glass frit composite coating capable of reducing resonant vibrations in a substrate at temperatures between 700° F. to 1500° F. and said plasma spray coating as a coating on a substrate.

Abstract: A method is disclosed for applying a vibration-damping surface to an article. The method includes providing a coating material comprising a ceramic, metallic or cermet material and a viscoelastic glass frit and plasma spraying the coating material onto an article. The coating material forms a plurality of ceramic, metallic or cermet microstructures having voids with the viscoelastic glass frit distributed to interact with the voids to provide vibration damping. Also disclosed are plasma spray coatings for damping vibrations that includes a ceramic-glass frit composite coating capable of reducing resonant vibrations in a substrate at temperatures between 700° F. to 1500° F. and said plasma spray coating as a coating on a substrate.