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To improve the mechanical properties of self-lubricating chromium vanadium nitride(CrVN)coatings,vanadium nitride(VN)is combined with CrVN to form multilayered CrVN/VN coatings through an in-line magnetron sputtering system.The strengthening effect of the period thickness on the mechanical and tribological properties is studied.X-ray diffractometer,low-angle X-ray reflectivity,scanning electron microscopy,atomic force microscopy,electron probe micro-analyzer and X-ray photoelectron spectroscopy are employed to characterize the microstructures and chemical composition.Nanoindentation and ball-on-disc tribo-tester are used in characterization of the mechanical and tribological properties.The CrVN/VN multilayer coatings demonstrate good lubrication property with coefficient of friction down to 0.23.Multilayering with VN,the hardness of CrVN jumps to 27.6GPa with period thickness of 6nm,which has an improvement of 5.1GPa compared with that of 22.5GPa from rule-of-mixture.
To improve the mechanical properties of self-lubricating chromium vanadium nitride (CrVN) coatings, vanadium nitride (VN) is combined with CrVN to form multilayered CrVN / VN coatings through an in-line magnetron sputtering system. The strengthening effect of the period thickness on the mechanical and tribological properties are studied. X- ray diffractometer, low-angle X-ray reflectivity, scanning electron microscopy, atomic force microscopy, electron probe micro-analyzer and X-ray photoelectron spectroscopy are employed to characterize the microstructures and chemical composition. Nanoindentation and ball-on-disc tribo-tester are used in characterization of the mechanical and tribological properties. The CrVN / VN multilayer coatings demonstrate good lubrication property with coefficient of friction down to 0.23. Multilayering with VN, the hardness of CrVN jumps to 27.6 GPa with period thickness of 6nm, which has an improvement of 5.1GPa compared with that of 22.5GPa from rule-of-mixture.