Please use this identifier to cite or link to this item: https://hdl.handle.net/11499/5567
Title: Effect of humidity on the tribological behavior of diamond-like carbon (DLC) film coated on WC-Co by physical vapor deposition method
Other Titles: The effect of humidity on the tribological behavior of diamond-like carbon (DLC) film coated on WC-Co by physical vapor deposition method
Authors: Özmen, Yılmaz
Tanaka, A.
Sumiya, T.
Keywords: Amorphous films
Crack propagation
Failure analysis
Friction
Interfaces (materials)
Optical correlation
Scanning electron microscopy
Substrates
Tribology
Tungsten compounds
Vapor deposition
Wear of materials
Diamond-like carbon (DCL) films
Ion plating
Physical vapor deposition method
Protective coatings
diamond-like carbon
diamond-like coating
friction
humidity
ion plating
tribology
wear prevention
Publisher: Elsevier Sequoia SA
Abstract: DLC films have been coated by PVD on WC-Co substrate with and without Si interface. They have been tested under low (approximately 20%) and high (approximately 80%) humidity conditions by reciprocating friction and wear apparatus. For ascertaining the wear mechanism from the topographies of DLC films, optical and SEM images of wear tracks have been taken. Wear debris particles behave as an abrasive agent, depositing into the film and causing the start of failure. There are multiple wear mechanisms, such as fatigue, abrasion, etc., existing simultaneously in the wear of DLC film in both cases. Wear rate decreases as the total wear way increases. For the case of DLC coating without Si interface there is a good correlation between wear rate and friction coefficient. However, this harmony disappears for DLC/Si coating. A chemically activated process may be assumed as the controlling step in the micro crack propagation during the generation of a wear debris particle. The different tribological behaviors of the DLC coatings under different environmental conditions are explained.
URI: https://hdl.handle.net/11499/5567
https://doi.org/10.1016/S0257-8972(00)00929-4
ISSN: 0257-8972
Appears in Collections:Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Teknoloji Fakültesi Koleksiyonu
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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