Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
614816 | Tribology International | 2014 | 9 Pages |
Abstract
This work presents a tribological study on three sputtered amorphous carbon-based coatings containing Si and Cr (a-C, a-C:Cr and a-C:Si). Molecular dynamics simulations predict tetrahedral bonds between C and Si in the a-C matrix. Ball-on-disk-tests against Al2O3 carried out at room temperature revealed a coefficient of friction of 0.08-0.1 for all films. Between 250 and 325 °C, Si decreases the COF and wear rate to <0.05 and <5Ã10â17m3/NÃlaps, respectively. The a-C reference shows a COF of 0.15±0.05 and a wear rate of 1Ã10â16m3/NÃlaps, whereas the a-C:Cr film failed. The improved tribological performance of a-C:Si expands its application temperature to 450 °C and is most probably related to formation of Si-compounds on the film surface, as evidenced by X-ray photoelectron spectroscopy.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Colloid and Surface Chemistry
Authors
O. Jantschner, S.K. Field, D. Music, V.L. Terziyska, J.M. Schneider, F. Munnik, K. Zorn, C. Mitterer,