| Abstract Scope |
Advanced ceramic coatings are attractive in many industries, ranging from microelectronics to aerospace. Fabricating dense ceramic coatings using the current techniques is challenging due to the brittleness and high melting temperature of ceramics. Aerosol deposition (AD), a solid-state coating process, was invented for producing dense nanocrystalline ceramic films. AD has attracted attention in the ceramic coating field due to its unique features, including the room temperature nature, high film density with crack-free structure, controllable coating thickness, relatively high deposition rate, enhanced mechanical properties, and a wide choice of substrates. Raw alumina (Al2O3) powders were pre-treated to obtain different particle sizes and size distributions. With the self-designed deposition system, dense Al2O3 coatings with the thickness of 10 micrometers were fabricated and analyzed for the microstructure and mechanical properties. To illustrate the effect of substrate roughness and hardness, stainless steel, alumina, and glass plates were used. |