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Structural, mechanical, and tribological properties of CrCN coatings obtained by cathodic arc physical vapour deposition technology at different CH4/N2 gas ratio

  • Chromium carbonitride coatings were deposited by cathodic arc physical vapor deposition technology at a temperature of 300 °C, as were used the reactive gasses CH4 and N2. The structural analysis of the CrN coating showed a polycrystalline structure with mixed CrN and Cr2N phases. All studied coatings, including the CrC exhibits fcc structure. The phases were confirmed by X-ray photoelectron spectroscopy measurements where a surface oxidation was also detected. The increase of the CH4 gas flow during the deposition process leads to a parabolic trend with the highest hardness of 33.5 GPa for the coating deposited at CH4 / N2 = 0.53. At the same time the lowest coefficient of friction for both counterparts Al2O3 and ZrO2 (0.28 and 0.26, respectively) were measured at CH4 / N2 = 1.86. The tribological tests reveal that the wear of the coatings increases with an increasing CH4 flow rate, whereas the coefficient of friction decreases. This observed contradiction is explained by a phenomenon described as the effect of Rebinder.

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Author: Nikolay Petkov, Totka Bakalova, Aleksei ObrosovORCiD, Egor B. Kashkarov, Martin Kormunda, Pavel Kejzlar, Hristo Bahchedzhiev, Karel Dadourek, Sabine WeißORCiDGND
URL:https://www.sciencedirect.com/science/article/pii/S0040609022005715
DOI:https://doi.org/10.1016/j.tsf.2022.139669
ISSN:1879-2731
Title of the source (English):Thin Solid Films
Document Type:Scientific journal article peer-reviewed
Language:English
Year of publication:2023
Tag:Cathodic arc deposition; Chromium carbonitride; Mechanical properties; Wear; X-ray diffraction; X-ray photoelectron spectroscopy
Volume/Year:766
Article number:139669
Faculty/Chair:Fakultät 3 Maschinenbau, Elektro- und Energiesysteme / FG Metallkunde und Werkstofftechnik
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