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The mechanisms of cracking in multi-layered composite nano-structured coatings deposited through the use of the technologies of filtered cathodicvacuum arc deposition(FCVAD) (coatingsZr-ZrN-(ZrCrAl)N, Cr-CrN-(TiCrAl)N, Zr-ZrN -(ZrNbTiAl))and lateral rotating cathodes (coating Ti-TiAlN-TiAlN) are explored herein.The formed coatings are characterised by parameters such as hardness, adhesion strength...
The scratch resistance of thin ZnO films deposited on a polyimide interlayer is characterized experimentally and simulated using a 3D finite element model. Nanoscratch tests combined with scanning electron microscopy observation to analyze the failure mechanisms in the brittle hard films are performed. The thickness of the polymer interlayer is shown to play a major role in controlling the scratch...
Results of investigations of multilayer CrN/CrCN coating – X6CrNiTi18-10 stainless steel substrate system exposed to cavitation degradation are presented. CrN/CrCN coating with six CrN + CrCN bilayers was deposited using cathodic arc evaporation PVD method. Cavitation erosion tests showed that deposition of CrN/CrCN coating increased incubation period, but cumulative mass loss of the CrN/CrCN – X6CrNiTi18-10...
This paper presents the results of a study of the mechanisms of delamination and the formation of longitudinal cracks in the structure of multi-layered nano-structured coatings to predict the mechanisms for further improvement of tool life and the reliability of metal-cutting tools. Various mechanisms of formation of longitudinal cracks and delaminations in coatings on rake and flank tool surfaces,...
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