| The dry sliding wear of monolayer TiAlN, TiAlCrN and multilayer TiAlN/CrN coatings have been investigated against alumina counterpart. All tested films were deposited using cathodic arc evaporation with Ti/Al and Cr cathode. All coatings were deposited on Cr and CrN sublayers, which reduces stresses between film and substrate and causes adhesion increasing. Coatings with chromium show lower friction coefficient when compared with TiAlN film and meaningful lower wear rate of the coating. Increasing the normal force and bilayer thickness of multilayer coating causes reduction the friction coefficient from 0.85 to 0.77 and from 0.90 to 0.77 respectively. Wear rate for TiAlN was measured as 5x10-6 mm3/Nm, for TiAlCrN 5x10-7 mm3/Nm, for TiAlN/CrN 3x10-6 mm3/Nm. Wear rate for alumina counterpart was at least an order of magnitude lower than tested coatings. |
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