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Friction and wear behaviours of Ti(C,O,N) dark decorative coatings
Munteanu, D.; Gabor, C.; Constantin, D. G.; Varga, B.; Adochite, R.; Andrei, O. C.; Chappé, J. M.; Cunha, L.; Moura, C.; Vaz, F.Reactive magnetron sputtering was used to obtain dark Ti(C,O,N) decorative coatings onto high speed steel. From a crystallographic point of view, depending by the amount of (N+O) mixture, the obtained films could be divided in two major regions: the first one with a predominant fcc crystallographic structure (for low amounts of (N+O)), and the second one containing films with amorphous structures. The best resu...
Ti–Si–C thin films produced by magnetron sputtering : correlation between physi...
Cunha, L.; Vaz, F.; Moura, C.; Munteanu, D.; Ionescu, C.; Rivière, J. P.; Le Bourhis, E.Ti–Si–C thin films were deposited onto silicon, stainless steel and high-speed steel substrates by magnetron sputtering, using different chamber configurations. The composition of the produced films was obtained by Electron Probe Micro-Analysis (EPMA) and the structure by X-ray diffraction (XRD). The hardness and residual stresses were obtained by depth-sensing indentation and substrate deflection measurements ...
Tribological characterisation of magnetron sputtered Ti(C, O, N) thin films
Olteanu, C.; Munteanu, D.; Ionescu, C.; Munteanu, A.; Chappé, J. M.; Cunha, L.; Vaz, F.Ti(C, O, N) thin films were prepared by magnetron sputtering and analysed in terms of their tribological properties. Surface and tribological parameters were analysed and discussed as a function of the films composition and structural features, as well as their thickness. The evolution of friction coefficient values was in concordance with the wear behaviour of the films. According to the atomic composition of ...
Properties changes of Ti(C, O, N) films prepared by PVD : the effect of reactiv...
Cunha, L.; Moura, C.; Vaz, F.; Chappé, J. M.; Olteanu, C.; Munteanu, D.; Munteanu, A.Dark Ti-C-O-N thin films were deposited by dc reactive magnetron sputtering. A titanium target was sputtered while three different gas flows were injected into the deposition chamber: argon (working gas), acetylene and a mixture of oxygen and nitrogen (reactive gases). The films were produced with variation of the gases flow rates, maintaining the remaining parameters constant. Varying the ratio between the rea...
Influence of composition and structural properties in the tribological behaviou...
Munteanu, D.; Ionescu, C.; Olteanu, C.; Munteanu, A.; Davin, F.; Cunha, L.; Moura, C.; Vaz, F.Article in press ; Within the frame of this work, low temperature Ti–Si–C films were deposited on high-speed steel and stainless steel substrates by combined dc/rf magnetron co-sputtering. Composition analysis revealed the existence of two distinct regions: (i) a silicon doped sub-stoichiometric titanium carbide zone and (ii) a titanium rich zone. Structural analysis confirmed the different nature of the prepa...
TiN-based decorative coatings : colour change by addition of C and O
Chappé, J. M.; Fernandes, Ana C.; Cunha, L.; Moura, C.; Vaz, F.; Martin, N.; Munteanu, D.; Borcea, B.As a result of technological progress in recent years, a new challenge was passed onto decorative hard coatings. While enhancing the appearance and lending attractive coloration to surfaces, the films are supposed to provide scratch resistance, protection against corrosion and durability. For this work, TiN(O) and TiN(C,O) thin films were prepared. Within the TiN(O) system, film colours varied from the glossy g...
The influence of structure changes in the properties of TiCxOy decorative thin ...
Fernandes, A. C.; Vaz, F.; Cunha, L.; Parreira, N. M. G.; Cavaleiro, A.; Goudeau, Ph.; Bourhis, E. Le; Rivière, J. P.; Munteanu, D.; Borcea, B.The main purpose of this work consists in the preparation of titanium oxycarbide, TiCxOy, thin films, in which the presence of oxygen changed the film properties between those of titanium carbide and those of titanium oxide. Varying the oxide/carbide ratio allowed to tune the structure of the films between titanium oxide and carbide and consequently electronic, mechanical and optical properties of the films. Th...
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