Tratamento termoquímico do titânio auxiliado por plasma de ar - N2 - O2
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...
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| Formato: | Dissertação |
| Idioma: | por |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/12701 |
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| Resumo: | 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 |
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