Influence of humidity on the impact resistance and tribological behaviour of carbon-based composite coatings prepared by a combined PVD/PACVD process

0336772 - ÚPT 2010 RIV MX eng C - Conference Paper (international conference)
Grossman, Jan - Vyskočil, J. - Novák, R. - Fořt, Tomáš - Vítů, T. - Dupák, Libor - Sobota, Jaroslav
Influence of humidity on the impact resistance and tribological behaviour of carbon-based composite coatings prepared by a combined PVD/PACVD process.
ICPIG 2009 Conference Proceedings 29th International Conference on Phenomena in Ionized Gases. Cancún: ICPIG2009 Local Organizing Committee, 2009 - (de Urquijo, J.), PB13-2:1-3. ISBN 978-1-61567-694-1.
[International Conference on Phenomena in Ionized Gases (ICPIG) /29./. Cancun (MX), 12.07.2009-17.07.2009]
R&D Projects: GA MPO 2A-1TP1/031
Institutional research plan: CEZ:AV0Z20650511
Keywords : PVD/PACVD * Carbon-based coatings
Subject RIV: BL - Plasma and Gas Discharge Physics
http://www.icpig2009.unam.mx/pdf/PB13-2.pdf

In this paper, we have measured the influence of humidity on tribological behaviour and impact resistance of carbon-based hard composite coatings deposited by PACVD with an interface magnetron sputtered metallic layer. It is well known, that humidity can significantly influence the tribological behaviour of carbon-based coatings, but unexpectedly, also influence of humidity on impact resistance of this type of film. By increasing the relative humidity from 2.5% to 95%, the value of dynamic impact resistance increases more than four times. Simultaneously the wear rate 0 the coated part increases by more than four orders of magnitude. By optimising components coated by carbon-based coatings exposed to dynamical load, we must take into account not only temperature, roughness of surfaces, and contact pressure but also the influence of the relative humidity at which the component runs.
Permanent Link: http://hdl.handle.net/11104/0180935