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Formation mechanisms of low-friction tribo-layers on arc-evaporated TiC1− xNxhard coatings

Elsevier B.V.
Publication Date
DOI: 10.1016/j.wear.2007.11.020
  • Ticn Coatings
  • Low-Friction Mechanisms
  • Raman Micro-Spectroscopy
  • Ball-On-Disc Sliding
  • Ambient-Dependent Wear Mechanisms


Abstract A detailed correlation of the tribological performance of arc-evaporated TiC 1− x N x coatings with testing temperature, atmosphere as well as variation in load and sliding velocity is presented in this paper. The low-friction behavior in combination with its mechanical integrity are the reasons for the extensive industrial application of TiC 1− x N x over the last decades. Still the tribo-mechanisms behind this performance are not yet completely understood. The present study adds further understanding, as the low-friction behavior degrades at elevated temperatures and dry or inert environments, which is related to the different constitution of the tribo-layer formed as investigated by Raman spectroscopy. Surprisingly, the wear rate of the coatings does not correlate with the coefficient of friction indicating the presence of different wear regimes.

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