Formation of nanogetherogenic materials with increased characteristics of heat resistance

Abstract

The work performed the researches, aimed at creating compositions - nanoheterogeneous materials with increased characteristics of heat resistance. A critical analysis of widely studied brands of coatings from the standpoint of modern materials science was conducted, at the result of what was shown that many of the applied heterogeneous nanostructured protective coatings can be recognized as neither rational in composition nor the best in properties. Of the known groups of materials with special physical and chemical properties, the least studied are nanostructured nanoheterogeneous coatings, due to the lack of a rigorous theory and the presence of criteria selected for its evaluation. Therefore, the aim of the work became a develop general principles for obtaining rational compositions of nanoheterogeneous coatings with increased characteristics of high heat resistance. Nickel was chosen as the basis for the heterogeneous coating. The results of the study of the protective nanoheterogeneous coating of the Ni–Al–Ti–C–SiO2–Al2O3–B2O system are presented. The proposed coatings differ in that they have an order of magnitude higher resistance to oxidation compared to stainless steel. Wear intensity indicators remain virtually unchanged over the entire temperature range and are much lower than traditionally used wear-resistant materials. At the change of speed of sliding in the conditions of the increased loadings intensity of wearing remains practically invariable and is twice less in comparison with coverings of tungsten carbide. Keywords: heat-resistant coatings, alloy, oxidation resistance, wear intensity, heat resistance