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Journal of Materials Science

, Volume 41, Issue 17, pp 5639–5645 | Cite as

Substrate temperature and water vapour effects on structural and mechanical properties of TiOxNy coatings

  • J. M. Chappé
  • J. Gavoille
  • N. Martin
  • J. Lintymer
  • J. Takadoum
Article

Abstract

Dc reactive sputtering was successfully implemented to deposit titanium oxynitride thin films using a titanium metallic target, argon, nitrogen and water vapour as reactive gases. The nitrogen partial pressure was kept constant during every deposition whereas that of the water vapour was systematically changed from 0 to 0.1 Pa. The study aims at comparing the structural and mechanical properties of the coatings deposited at room temperature (293 K) and at 673 K. Surface morphology of the film was examined by atomic force microscopy and showed different aspects according to the growth temperature. Topography mainly depends on the amount of water vapour introduced during the deposition process. Some significant changes of the crystallographic structure, due to the high substrate temperature were correlated with the evolution of the surface aspect and roughness parameters. Determination of the phase occurrence by X-ray diffraction was also carried out and appeared to be a significant parameter in understanding the evolution of mechanical properties like nanohardness (Hn) and Young’s modulus (E). Hn and E values obtained by nanoindentation ranged from 16.5 to 7 GPa and from 240 to 100 GPa, respectively. For both temperatures, mechanical properties of titanium oxynitride thin films were notably reduced as a function of the water vapour supply, especially for partial pressures higher than 4 × 10−2 Pa. These mechanical behaviours were correlated and discussed with the phase occurrence and the amorphous structure of titanium oxynitride thin films.

Keywords

Water Vapour Substrate Temperature Water Vapour Pressure Nitrogen Partial Pressure Nuclear Reaction Analysis 

Notes

Acknowledgements

The authors gratefully acknowledge the financial support of the European Union through the NMP3-CT-2003-505948 project “HARDECOAT”. They also thank the Region of Franche-Comté, France.

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Copyright information

© Springer Science+Business Media, LLC 2006

Authors and Affiliations

  • J. M. Chappé
    • 1
  • J. Gavoille
    • 1
  • N. Martin
    • 1
  • J. Lintymer
    • 1
  • J. Takadoum
    • 1
  1. 1.Laboratoire de Microanalyse des Surfaces (LMS)Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)Besançon CedexFrance

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