Al2O3-ZrO2　ceramic　coatings　were　prepared　on　6061　Al　alloy　by　Micro　Arc　Oxidation　(MAO)　and　Selective　Laser　Melting　(SLM).　Coatings　prepared　by　MAO　exhibit　a　porous　structure　and　a　progressive　oxidation　of　the　substrate　as　a　function　of　processing　time.　Those　made　by　SLM　are　denser,　although　the　presence　of　cracks　is　observed　throughout　their　surface.　XRD　results　suggest　that　the　ceramic　coating　consists　of　m-ZrO2,　t-ZrO2　and　γ-Al2O3　phases　for　the　MAO　process,　while　a　Zr3O　phase　is　also　present　in　SLM.　The　hardness　of　the　MAO　Al2O3-ZrO2　coating　is　higher　than　that　obtained　by　SLM.　Young＇s　modulus　of　the　MAO　coating　is　lower,　due　to　higher　level　of　porosity　observed　in　the　coating　prepared　by　MAO.　Moreover,　in-situ　oxidation,　heating　and　solidification　processes　are　all　discussed　and　compared　within　the　context　of　MAO　and　SLM　peculiarities.　The　processes　and　transformation　mechanisms　involved　in　the　processing　methods　produce　diverse　microstructures.　©　2022　The　Authors