Author/Authors :
Wang، نويسنده , , Qianzhi and Zhou، نويسنده , , Fei-Xiang Ding، نويسنده , , Xiangdong and Zhou، نويسنده , , Zhifeng and Wang، نويسنده , , Chundong and Zhang، نويسنده , , Wenjun and Li، نويسنده , , Lawrence Kwok-Yan and Lee، نويسنده , , Shuit-Tong Lee، نويسنده ,
Abstract :
The Cr containing amorphous carbon coatings (Cr/a-C) with varying Cr content were deposited using unbalanced magnetron sputtering. The results revealed that the chromium carbide nano-clusters were formed when the Cr content exceeded 4.9 at%. The critical load increased while the hardness decreased after the Cr element incorporation. Although the low Cr containing Cr/a-C coatings (≤4.9 at%) exhibited similar friction coefficient with a-C coatings, but the initial friction coefficient, running-in distance and wear rate of SUS440C balls all decreased. However, the Cr/a-C coatings with high Cr content (11.98–14.09 at%) would worsen the tribological properties because chromium carbides acted as abrasive wear particles during tribotests.
Keywords :
Hydrogen-free carbon based coatings , mechanical properties , microstructure , Tribology
