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Ag+ release and corrosion behavior of zirconium carbonitride coatings with silv...
Calderon Velasquez, S.; Galindo, R. Escobar; Oliveira, J. C.; Cavaleiro, A.; Carvalho, S.Zirconium carbonitride coatings with silver nanoparticles were produced by DC unbalanced dual magnetron sputtering system, using two targets, Zr and Zr/Ag in an Ar, C2H2 and N2 atmosphere. Stainless steel 316L and silicon (100) substrates were used for electrochemical and structural characterization, respectively. Silver was found to be well distributed throughout the coatings, maintaining the films' compositio...
Ag+ release inhibition from ZrCN–Ag coatings by surface agglomeration mechanism...
Calderon Velasquez, S.; Escobar Galindo, R.; Benito, N.; Palacio, C.; Cavaleiro, A.; Carvalho, S.Published 17 July 2013 ; New multifunctional materials based on well-established materials to which functional properties are added, such as antibacterial performance, have become a relevant research topic, in order to meet the requirements of today's technological advances. This paper reports the results of a detailed structural and chemical characterization study of ZrCN–Ag coatings produced by reactive magn...
Surface characterization of Ti-Si-C-ON coatings for orthopedic devices : XPS an...
Oliveira, C.; Escobar Galindo, R.; Palacio, C.; Calderon Velasquez, S.; Almeida, B. G.; Henriques, Mariana; Espinosa, A.; Carvalho, S.Ti–Si–C–ON films were deposited by DC reactive magnetron sputtering and their chemical properties, biofilm formation and toxicity were characterized. Based on the films composition three different growth regimes were identified on the films; (I) N/Ti = 2.11 (high atomic ratio) and low oxygen content; (II) 0.77 ≤ N/Ti ≤ 1.86 (intermediate atomic ratio) and (III) N/Ti ≤ 0.12 (low ratio) and high oxygen content. T...
Structure-property relations in ZrCN coatings for tribologic applications
Silva, E.; Figueiredo, M. Rebelo; Franz, R.; Escobar Galindo, R.; Palacio, C.; Espinosa, A.; Calderon Velasquez, S.; Mitterer, C.; Carvalho, S.ZrCN coatings were deposited by dc reactive magnetron sputtering with N2 flows ranging from 2 to 10 sccm in order to investigate the influence of the nitrogen incorporation on structure and properties. Information about the chemical composition was obtained by glow discharge optical emission spectroscopy and Rutherford backscattering spectroscopy. The evolution of the crystal structure studied by X-ray diffract...
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