Influence of topography on plasma treated titanium surface wettability

Silva, Marco Aurélio Medeiros da; Guerra Neto, Custódio Leopoldino de Brito; Nunes Filho, Antônio; Freitas, D.O.; Braz, Danilo Cavalcante; Alves Júnior, Clodomiro

Influence of topography on plasma treated titanium surface wettability

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dc.contributor.author	Silva, Marco Aurélio Medeiros da
dc.contributor.author	Guerra Neto, Custódio Leopoldino de Brito
dc.contributor.author	Nunes Filho, Antônio
dc.contributor.author	Freitas, D.O.
dc.contributor.author	Braz, Danilo Cavalcante
dc.contributor.author	Alves Júnior, Clodomiro
dc.date.accessioned	2020-07-13T16:59:32Z
dc.date.available	2020-07-13T16:59:32Z
dc.date.issued	2013
dc.description.resumo	With the aim of studying the topographic influence on wettability of plasma-treated surfaces, we used eighteen commercially pure titanium (CP Titanium) disks (grade II), 10 mm in diameter and 1 mm thick, and in atmospheres of Argon (Ar), Hydrogen H2 and Ar–H2. These samples were submitted to plasma produced by hollow cathode discharge (HCD) for 20 and 60 min at a voltage of 500 V and pressure of 220 Pa. After pre-treatment, the state of the sample surfaces was assessed for surface phases with grazing incidence X-ray diffraction (GIXRD), and XPS (X-ray photoelectron spectroscopy), evaluated by atomic force microscopy (AFM) and wettability, using the sessile drop test. It was found that all the conditions were effective in reducing oxide, resulting in different wettability values. Correlation between average roughness (Ra) parameters and the ratio between maximum peak height and average distance between the highest peak and lowest valley (Rp/Rz) and wettability for the different treatment conditions were analyzed. Given the results obtained, it was concluded that Ra and Rp/Rz are not appropriate for correlating with wettability and it is suggested that a new topographic parameter be adopted for the Cassie–Baxter equation. XPS analysis showed that reduction efficacy was greater for the Ar–H2 mixture, followed by Ar and H2	pt_BR
dc.identifier.citation	SILVA, M. A. M.; GUERRA NETO, C. L. B.; NUNES FILHO, A.; FREITAS, D. O.; C.BRAZ, D. ; ALVES JUNIOR, C.. Influence of topography on plasma treated titanium surface wettability. Surface and Coatings Technology, v. 235, p. 447-453, 2013. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0257897213007536. Acesso em: 12 jul. 2020. https://doi.org/10.1016/j.surfcoat.2013.08.001	pt_BR
dc.identifier.doi	10.1016/j.surfcoat.2013.08.001
dc.identifier.issn	0257-8972
dc.identifier.uri	https://repositorio.ufrn.br/jspui/handle/123456789/29577
dc.language	en	pt_BR
dc.publisher	Elsevier	pt_BR
dc.rights	Attribution 3.0 Brazil	*
dc.rights.uri	http://creativecommons.org/licenses/by/3.0/br/	*
dc.subject	Titanium	pt_BR
dc.subject	Plasma treatment	pt_BR
dc.subject	Titanium oxide reduction	pt_BR
dc.subject	Wettability	pt_BR
dc.subject	Roughness	pt_BR
dc.subject	Parameter	pt_BR
dc.title	Influence of topography on plasma treated titanium surface wettability	pt_BR
dc.type	article	pt_BR