Authors: F.I. Panteleenko, V.A. Okovity, V.A. Sidorov, Okovity , V.M. Astashinsky

Title of the article: Overview of modern ceramic coating applications

Year: 2021, Issue: 3, Pages: 5-17

Branch of knowledge: 05.02.08 Engineering Technology

Index UDK: 621.793.71

DOI: 10.26730/1999-4125-2021-3-5-17

Abstract: The article analyzes the current application and features of metal-ceramic plasma coatings. It can be stated that these compositions (oxide-metal component) are used as dielectric, heat-shielding and wear-resistant coatings. In this work, special attention is paid to the influence of the formed structure on the physicomechanical and operational properties of MCrAlYTa alloys reinforced with refractory oxides (for example, Al₂O₃ Al₂O₃-ТiО₂) and ceramics Al₂O₃-ТiО₂ with the addition of hard metals. Pure MCrAlYTa are not suitable for tribological applications because their low hardness can lead to very high wear under sliding contact conditions, especially during the running-in phases at low temperatures. Therefore, the fabrication of composite coatings based on MCrAlYTa alloys reinforced with refractory oxides seems to be a necessary solution in order to relate the resistance of the metal to oxidation with the hardness and chemical stability of the ceramic phase. The coatings obtained from titanium dioxide-alumina have low wear resistance and hardness under friction conditions at high temperatures, low heterogeneity of coatings associated with the non-optimal ratio of soft and hard components in the coating. Creation of a composite ceramic material based on oxide ceramics with the addition of molybdenum, which has good technological characteristics, is resistant to maintaining the chemical composition during thermal spraying and is capable of forming plasma coatings with high wear resistance, a certain degree of heterogeneity (obtaining optimal ratios of soft and hard components in the coating), will allow us to obtain coatings with a low coefficient of friction, high hardness, wear resistance, and machinability.

Key words: metal-ceramic plasma coatings dielectric heat-shielding and wear-resistant coatings formed structures physical and mechanical and operational properties M-rabbits titanium dioxide-aluminum oxide

Receiving date: 06.03.2021

Publication date: 02.07.2021

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