Abstract:

In a fundamentally new way we obtained a composite metal-ceramic coating of the SiC–Al2O3 system, which contains metallic component based on iron. The metallic component was not introduced into the original charge in the powder form but was obtained as a result of grinding the charge components in steel drums with steel grinding bodies. We studied the possibility of obtaining plasma coatings applied from this composition to steel parts with the intermediate sublayer from intermetallic compound Ni3Al for restoring and reinforcing their surfaces. The optimum modes of the application of coating from this material by the plasma method were established. Using the method of scanning electron microscopy and X-ray phase analysis, the structure of coating applied from this material on medium-carbon steel was investigated. Obtaining coatings from these inexpensive components with high performance properties presents economic and technological interest. As a result, tribotechnical properties of coatings under friction conditions with heating of friction contact to 500 оС with the steel counterbody were explored. The regularities of their wear were established. Using the methods of scanning electron microscopy and X-ray phase analysis, the friction surfaces of the obtained coatings were studied and special features and laws governing the mechanisms of their wear under conditions of elevated temperatures were determined. The possibility of applying these coatings for protecting and reinforcing parts of aviation ground-based equipment, working at elevated temperatures, was shown. Author Biographies Liudmyla Pryimak, National Aviation University Kosmonavta Komarova ave., 1, Kyiv, Ukraine, 03058 PhD, Associate Professor Department of Airport technologies 

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