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In situ IR pyrometric analysis during thermal treatment in air of TiOxNy coatings

Duminica, Florin-Daniel and Maury, Francis In situ IR pyrometric analysis during thermal treatment in air of TiOxNy coatings. (2008) Surface and Coatings Technology, vol. 202 (n° 11). pp. 2423-2427. ISSN 0257-8972

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Official URL: http://dx.doi.org/10.1016/j.surfcoat.2007.07.051

Abstract

IR pyrometry is an original diagnostic tool for in situ analysis of surface transformations of coatings or bulk materials during the thermal treatment under reactive atmosphere such as high temperature oxidation. Significant oscillations of the pyrometric signal were observed during annealing in air of TiO1.5N0.5 coatings in the temperature range 673–823 K. This is due to interferences resulting from multi-reflections at the interfaces of a transparent growing film. This reveals the formation of a TiO2 thin film on the top of the TiO1.5N0.5 coating. Modeling of the time dependence of the IR pyrometric signal allows the determination of the oxide layer thickness, transformation rate and optical properties of the films under the growth conditions. The progressive oxidation of a compact amorphous TiO1.5N0.5 coating from the external surface to the substrate interface was supported by SIMS, XRD and reflectance analyses.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Surface and Coatings Technology website : http://www.sciencedirect.com/science/journal/02578972
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
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Deposited By:Celine Cabaup

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