Advisor(s)
Abstract(s)
Protective multi-component thin films at the surface of cutting tools have been significantly developed to reduce
wear and friction. The present work investigates the effect of substrate bias voltage on the structural-tribological
relations of W-Ti-C-N thin films produced by HiPIMS and DCMS co-sputtering. Chemical analysis of the coatings
is obtained and composite phase structure is revealed. Morphology of the coatings illustrates that defectless
surfaces may be achieved. Topographical parameters are investigated by employing graphical software. Indentation,
scratch and pin-on-disk tests (pin is AISI 52100 steel) are applied to study mechanical behaviors of the
films. To produce a wear-resistant film, a median bias voltage ( 60 V) and as a result, optimum content of
tungsten concentration (19.2 at. %), grain size (42.8 nm) and average peak interval (188 nm) is required. Finally,
a model based on the representative volume element is developed to show crack propagation and delamination.
Description
Keywords
PVD coatings Surface topography Indentation Wear testing Cutting tools
Citation
Publisher
Elsevier B.V.