Investigations of TiO2/NanoTiO2 Bimodal Coatings Obtained by a Hybrid PVD/ALD Method on Al-Si-Cu Alloy Substrate

This study aimed to investigate the influence of bimodal TiO2/nanoTiO2 coatings obtained in PVD/ALD hybrid process on an Al-Si-Cu-type aluminium alloy physicochemical properties investigated materials. The reference materials were uncoated substrates and samples coated with TiO2 single PVD ALD processes. Tests carried out morphology using scanning electron microscopy (SEM) atomic force (AFM) determine structure tested their properties. tests potentiodynamic electrochemical impedance spectroscopy methods. analysis corrosion products during was performed SEM EDS analysis. Based anode polarisation curves Tafel analysis, it found that a sample demonstrated highest resistance coating-type TiO2/nanoTiO2, which had lowest value current resistance. slightest characteristic for uncovered samples. Moreover, improvement tribological contact surfaces counter-specimen made cemented carbides demonstrated.