Effect of a-CNx coating on tribological properties of SiC ceramic in water

Fei Zhou, Koji Kato, Koshi Adachi

Research output: Contribution to journalConference articlepeer-review

13 Citations (Scopus)


The tribological behaviors of a-CNx/SiC tribo-pairs in water at low velocity were investigated and compared with SiC/SiC at room temperature. The results showed that the mean value μ of friction coefficients at steady state for a-CNx/SiC tribo-pairs (μ=0.075-0.12) was lower than that of SiC/SiC systems (μ=0.24-0.27). At a constant sliding speed, μ for two kinds of tribo-couples decreased with an increase in normal load, but at a constant normal load, μ for SiC/SiC system was nearly independence of sliding speed, whereas that of a-CNx/SiC tribo-pair decreased with sliding speed. The specific wear rates (ws) of ball and disk for a-CN x/SiC tribo-couples were considerably reduced by a factor up to 10 in the comparison to those of SiC/SiC systems. The observations of wear scars showed that the wear mechanism of CNx coating was micro-fracture of irregularities on the film surface for build-up of tribolayer, while that of SiC/SiC system was dominated by mechanical wear.

Original languageEnglish
Pages (from-to)2899-2904
Number of pages6
JournalMaterials Science Forum
Issue numberIV
Publication statusPublished - 2005
EventPRICM 5: The Fifth Pacific Rim International Conference on Advanced Materials and Processing - Beijing, China
Duration: 2004 Nov 22004 Nov 5


  • Amorphous Carbon Nitride Coatings
  • Friction
  • SiC Ceramic
  • Water Lubrication
  • Wear


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