Modification of nc-TiAlN/a-Si3N4 Nanocomposite Coatings by Carbon and Nitrogen Ion Implantations for Modern Industry
DescriptionIt has been shown that nanocomposite coatings such as nc-TiAlN/a-Si3N4significantly improve the life of tools used in modern machining processes. To further increase the effectiveness of the coated tools for high speed dry machining, a novel method to enhance the hard coatings is necessary. Ion implantation has often been considered as a feasible method to improve the wear, corrosion, and oxidation resistance of coatings. This research proposes to modify the nc-TiAlN/a-Si3N4coatings through post-treatment of carbon and nitrogen ion implantation. The effect of ion implantation on the structural and mechanical properties of the nc-TiAlN/a-Si3N4coatings will be systematically studied. The mechanical and the microstructure properties of the implanted layer will be identified by a variety of analytical techniques, such as X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), scanning electron spectroscopy (SEM), atomic force microscopy (AFM), high resolution transmission electron microscopy (HRTEM), and nanoindentation measurements. In addition, tribological tests such as sliding, scratching, and cyclic impact tests will be carried out at elevated temperatures on the implanted coatings to simulate a wide range of machining conditions. Furthermore, the mechanism of the improved performance will be characterized and studied.
|Effective start/end date||1/01/08 → 16/03/11|