Abstract
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 language | English |
|---|---|
| Pages (from-to) | 2899-2904 |
| Number of pages | 6 |
| Journal | Materials Science Forum |
| Volume | 475-479 |
| Issue number | IV |
| DOIs | |
| Publication status | Published - 2005 |
| Event | PRICM 5: The Fifth Pacific Rim International Conference on Advanced Materials and Processing - Beijing, China Duration: 2004 Nov 2 → 2004 Nov 5 |
Keywords
- Amorphous Carbon Nitride Coatings
- Friction
- SiC Ceramic
- Water Lubrication
- Wear