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- W2023987249 abstract "Abstract The formation of thin reaction films in sliding contacts has provided the basis for the recent development of adaptive, self-lubricating coatings with optimum tribological properties. The aim of this study was to characterize TiN and VN coatings deposited by reactive unbalanced magnetron sputtering with respect to their oxidation behaviour at elevated temperatures and to correlate the formed oxides to the tribological properties. Dry sliding experiments were performed in the temperature range between 25 °C and 700 °C. Oxide phases were identified by X-ray diffraction (XRD) and Raman spectroscopy after tribometer testing. In the case of TiN coatings, only minor changes in the friction coefficient were detectable in the investigated temperature range. The onset of oxidation of TiN coatings, as evidenced by Differential scanning calorimetric (DSC) and thermo-gravimetric analysis (TGA), occurred at 600–700 °C and yields the formation of rutile. In the case of VN coatings, oxidation starts at about 500 °C with the formation of Magneli phases of vanadium oxides, which were identified by XRD as V2O5, VO2 and V6O13. In addition, it was found that the friction coefficient decreases continuously at temperatures above 400 °C, reaching a value of 0.25 at 700 °C due to the formation and melting of V2O5 which leads to liquid lubrication." @default.
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- W2023987249 date "2007-04-01" @default.
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- W2023987249 title "Influence of high-temperature oxide formation on the tribological behaviour of TiN and VN coatings" @default.
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- W2023987249 doi "https://doi.org/10.1016/j.wear.2006.11.006" @default.
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