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JUNE 28 WEDNESDAY MORNING
JS2-WeM-OR.5 DECORATIVE COATINGS OF TITANIUM OXIDE OBTAINED BY
PVD. J.A. García, R. Martínez. M. Rico and R.J. Rodríguez. Asociación de la Industria Navarra.
C/San Cosme y San Damián s/n, Pamplona 31191 Spain.Email: jagarcia@ain.es
In the last years PVD techniques have strongly emerged in the European market of the decorative
coatings. Faucets and other bath accessories are actually been coated with ceramic films like TiN
(golden yellow) and TiCN (brass) with excellent reproducibility and corrosion resistance, but the use
of these kind of hard coatings just provide a limited list of metallic colours.
In the recent years a wider colour range are been achieved using optical interference phenomena by
depositing nanometric metal Oxide films. It is possible to obtain different colours by controlling the
final thickness of the oxide layers. This article gathers the research to obtain different interference
colours, reports the obtained reflectance curves and tries to find the relations between the oxide
thickness measures by Glow discharge optical emission spectrometry with the colour parameters
measured with a spectrophotometer. Microstructure and thickness had also been measured by using
field emission scanning electron microscopy. As conclusion we can demonstrate that the final colour
is the results of the destructive interference, depending of the relation between the wave length of the
colour and the thickness of the oxide film.
Keywords. Decorative coatings, Interference colours, GDOES, FESEM
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