Sputtered Si-containing low-friction carbon coatings for elevated temperatures
| Autor: | Christian Mitterer, Oliver Jantschner, Katrin Zorn, Frans Munnik, Jochen M. Schneider, Velislava L. Terziyska, Denis Music, S.K. Field |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Materials science
Mechanical Engineering Metallurgy Temperature induced lubrication Analytical chemistry Amorphous carbon Thermal stability Surfaces and Interfaces Tribology Low friction Surfaces Coatings and Films Molecular dynamics X-ray photoelectron spectroscopy Mechanics of Materials Carbon coating Coefficient of friction Elevated temperatures |
| Zdroj: | Tribology International 77(2014), 15-23 |
| ISSN: | 0301-679X |
| DOI: | 10.1016/j.triboint.2014.04.006 |
| Popis: | 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 5 × 10 − 17 m 3 / N × laps , respectively. The a-C reference shows a COF of 0.15±0.05 and a wear rate of 1 × 10 − 16 m 3 / N × laps , 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect