Sliding properties of Zr-DLC coatings: The effect of tribolayer formation
作者： T. Vitu , A. Escudeiro , T. Polcar , A. Cavaleiro
DOI: 10.1016/J.SURFCOAT.2014.08.003
关键词:
摘要: Abstract Amorphous carbon-based coatings (DLC) exhibit excellent mechanical and tribological properties such as high hardness, elastic modulus, low friction wear. Reduced is often related to the formation of a low-friction tribolayer, which formed during sliding transferred counterpart. Here, we investigate hydrogenated non-hydrogenated DLC alloyed with zirconium; pure films are used reference. The were deposited by magnetron sputtering in Ar (non-hydrogenated) Ar/methane atmosphere (hydrogenated) onto steel substrates silicon wafers. total thickness was around 1.5 μm including complex Ti/TiN/TiCN adhesion-improving interlayer 450 nm. All amorphous, Zr/C ratio approx. 0.05. hardness range 9–13 GPa. Tribological tests carried out humid air at room temperature, 100 °C nitrogen environment using pin-on-disk. Intermittent test analysis has been performed understand running-in behaviour. worn surfaces wear debris analysed Raman spectroscopy. Coatings Zr showed lower temperature compared DLC. In general, Zr-doped coating outperformed one when tested an inert or elevated (100 °C), exhibiting almost super-low (μ = 0.03 steady-state regime) due homogenous, thick stable tribolayer.
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