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Tribological Performance of DLC/WC Coatings at Elevated Temperatures
Author(s) -
Vitu Tomas,
Novak Rudolf,
Novakova Danuse
Publication year - 2007
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.200730708
Subject(s) - tribometer , tribology , materials science , friction coefficient , composite material , coefficient of friction , coating , wear coefficient , metallurgy
Tribological properties of nanostructural DLC/WC coatings were measured with a high temperature pin‐on‐disc CSM Tribometer in the range from room temperature (RT) up to 500 °C. The tribological performance was evaluated with respect to the wear rates of balls and coatings, friction coefficient and wear debris analysis. The running‐in phenomenon of steel ball sliding against DLC coating was studied by sequential in situ measurements of ball wear rate. The wear volume was almost constant from number of cycles of 1 500–5 000. This phenomenon was caused by lowering of contact pressure and could not be caused by changing of wear mode; the measured friction coefficient showed no fluctuation at 1 500 cycles. Friction and wear characteristics described in this study showed their limitations of DLC applicability.