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Previous issue date: 2011-06-09 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / Discs were grade II cp Ti oxynitride by plasma of Ar - N2 - O2 using
different proportions of individual gases. These ratios were established from
analysis of optical emission spectroscopy (OES) of plasma species. The
proportions that resulted in species whose spectra showed an abrupt change of
light intensity were chosen for this study. Nanohardness tests revealed that
there was a correlation between the intensity of N2
+ species with the hardness,
because the treatments where they had a higher intensity, obtained a higher
value nanohardness, although the crystalline phases have remained
unchanged. With respect to topography, it was observed that in general, the
surface roughness is related to the intensities of plasma species, because they
may have different values depending on the behavior of the species. Images
obtained by optical microscopy revealed a surface with grains of different colors
to optical reflectance showed a peak of reflection in the red area. Measures the
contact angle and surface tension showed hydrophilic properties and
hydrophilic with little variation of polar and dispersive components of surface
tension / Discos de tit?nio cp grau II foram oxinitretados por plasma de Ar - N2 - O2
usando diferentes propor??es de gases individuais. Essas propor??es foram
estabelecidas a partir de an?lises de espectroscopia de emiss?o ?ptica (OES)
das esp?cies do plasma. As propor??es que resultaram em espectros cujas
esp?cies apresentaram varia??o abrupta de intensidade luminosa foram
escolhidas para o presente trabalho. Os ensaios de nanodureza revelaram que
houve uma rela??o entre a intensidade da esp?cie N2
+ com a dureza, pois para
os tratamentos onde estas apresentaram maior intensidade, obteve-se maior
valor de nanodureza, embora as fases cristalinas tenham se mantido
inalteradas. Com rela??o ?s topografias, observou-se que de um modo geral, a
rugosidade superficial est? relacionada com as intensidades das esp?cies do
plasma, pois estas podem apresentar valores diferentes dependendo do
comportamento das esp?cies. Imagens obtidas por microscopia ?ptica
revelaram uma superf?cie com gr?os de diferentes cores e a reflet?ncia ?ptica
mostrou um pico m?ximo de reflex?o na regi?o do vermelho. As medidas de
?ngulo de contato e tens?o mostraram superf?cies com propriedades
hidrof?licas e pouco hidrof?licas com varia??o das componentes polar e
dispersiva da tens?o superficial
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/12701 |
| Date | 09 June 2011 |
| Creators | Braz, Danilo Cavalcante |
| Contributors | CPF:09621199468, http://lattes.cnpq.br/7441669258580942, Lima, Jos? de Anchieta, CPF:36973637434, http://lattes.cnpq.br/0742445504420593, Grigorov, Korneli Grigoriev, CPF:22892487897, Alves J?nior, Clodomiro |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Ci?ncia e Engenharia de Materiais, UFRN, BR, Processamento de Materiais a partir do P?; Pol?meros e Comp?sitos; Processamento de Materiais a part |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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