The microstructure of alumina coatings prepared by aerosol assisted spray deposition

摘要: Abstract This paper presents the deposition of alumina coatings using a low cost aerosol assisted spray (AASD) in an open atmosphere at temperature. AASD is variant CVD, which involves spraying atomized precursor droplets into heated environment where undergo decomposition and chemical reaction near substrate produce solid stable coatings. Using same method but different starting (e.g. solution or suspension), dense porous deposits could be produced method. Dense thin were deposited containing aluminium alkoxide. Whereas thick prepared suspension powder alcohol solution. Such densified to form Continuous CO2 laser was used densify deposits. The microstructure characterized combination X-ray diffraction scanning electron microscope methods. by varying processing conditions. relationships between growth behavior also discussed.