Project/scholarship details
- Project/scholarship ID
38086
- Reference
POCTI/CTM/38086/2001
- FundRef URI
- Funder
FCT - Fundação para a Ciência e a Tecnologia, I.P.
- Funder's country
Portugal
- Funding program
POCI
- Funding amount
52,104.00 €
- Start date
2003-06-01
- End date
2006-05-31
Documents
Tribocorrosion behaviour of zrNxOy thin films for decorative applications
Ferreira, S. C.; Ariza, E.; Rocha, L. A.; Vaz, F.; Cunha, L.; Carvalho, P.; Rebouta, L.; Alves, E.; Goudeau, Ph.; Rivière, J. P.The main aim of this work is the investigation of the tribocorrosion behaviour of single layered zirconium oxynitride, ZrNxOy, thin films in alternative linear regime of sliding and immersed in an artificial sweat solution at room temperature. The films were produced by rf reactive magnetron sputtering, using a pure Zr target at a constant temperature of 300º C. Two different sets of samples were produced. In t...
Properties of MoNxOy thin films as a function of N/O ratio
Barbosa, José Gusman; Cunha, L.; Rebouta, L.; Moura, C.; Vaz, F.; Carvalho, S.; Alves, E.; Le Bourhis, E.; Goudeau, Ph.; Rivière, J. P.The main purpose of this work consists on the preparation of single layered molybdenum oxynitride, MoNxOy. The films were deposited on steel substrates by dc reactive magnetron sputtering. The depositions were carried out from a pure Mo target varying the flow rate of reactive gases, which allowed tune the crystallographic structure between insulating oxides and metallic nitrides and consequently electronic, me...
Tribocorrosion behaviour of ZrOxNy thin films for decorative applications
Ferreira, S. C.; Ariza, E.; Rocha, L. A.; Gomes, J. R.; Carvalho, P.; Vaz, F.; Fernandes, A. C.; Rebouta, L.; Cunha, L.; Alves, E.The aim of this work is the investigation of the tribocorrosion behaviour of single layered zirconium oxynitride, ZrOxNy, thin films in 11 reciprocating sliding and immersed in an artificial sweat solution at room temperature. During the wear tests samples were kept under 12 potentiostatic control and the corrosion current were monitored. Also, Electrochemical Impedance Spectroscopy (EIS) tests were performed b...
Raman spectra and structural analysis in ZrOxNy thin films
Moura, C.; Carvalho, P.; Vaz, F.; Cunha, L.; Alves, E.Raman spectroscopy has been used as a local probe to characterize the structural evolution of magnetron-sputtered decorative zirconium oxynitride ZrOxNy films which result from an increase of reactive gas flow in the deposition The lines shapes, the frequency position and widths of the Raman bands show a systematic change as a function of the reactive gas flow (a mixture of both oxygen and nitrogen). The as-dep...
Development of new decorative coatings based on zirconium oxynitrides
Carvalho, P.Tese de Doutoramento em Ciências - Área de Conhecimento de Física; Within the scope of a Ph.D. exam, a thesis entitled “Development of new decorative coatings based on zirconium oxynitrides” is proposed. The main objective of this project consists in the preparation of coloured-multifunctional thin films, with a wide range of properties. In order to prepare these films, the project will be focused on the study ...
Effect of thermal treatments on the structure of MoNxOy thin films
Cunha, L.; Rebouta, L.; Vaz, F.; Staszuk, M.; Malara, S.; Barbosa, J.; Carvalho, P.; Alves, E.; Le Bourhis, E.; Goudeau, Ph.; Rivière, J. P.Article in Press; MoNxOy films were deposited on steel substrates by dc reactive magnetron sputtering. The depositions were carried out from a pure molybdenum target, varying the flow rate of reactive gases. X-ray diffraction (XRD) results revealed the occurrence of cubic MoNx and hexagonal (d-MoN) phases for the films with high nitrogen flow rates. The increase of oxygen content induces the decrease of the gra...
TiCxOy thin films for decorative applications : tribocorrosion mechanisms and s...
Mathew, M. T.; Ariza, E.; Rocha, L. A.; Fernandes, Ana C.; Vaz, F.Recently, tribocorrosion is widely accepted as an interdisciplinary area of research and such studies on the various materials is gaining more attention by the scientist and engineers due to its practical and economical significances. Hence the main objective of present work was to investigate the tribocorrosion behavior of single layered titanium oxycarbide, TiCxOy, thin films on a reciprocating sliding tribo-...
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