Abstract

AbstractAluminum alloys used in combustion engines can be damaged by heat. Thermal barrier coatings (TBCs) can help mitigate this type of heat damage. This study examines aluminum oxide/yttria-stabilized zirconia (80%8YSZ/20%Al2O3) was coated as a thermal barrier coating (TBCs) over a NiCrAlY bond coat using the atmospheric plasma spray technique (APS) on an aluminum alloy Al4032 substrate. Top coat (80%8YSZ/20%Al2O3) and bond coat NiCrAlY thicknesses were coated as approximately 265 and 100 µm. SEM, EDS (elemental analysis), and XRD analysis were used to examine the coating layers. The surface roughness of the substrate (Al4032) was evaluated before and after coating, and it has been found that the surface roughness was observed to be higher after coating. Vickers micro-hardness carried out at different layers showed the compactness of the deposited coating.KeywordsThermal barrier coating (TBC)Atmospheric plasma spray (APS)MicrostructureEnergy dispersive spectroscopy (EDS)

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