Investigation of mechanical characteristics of detonation and plasma coatings from composite powder materials based on titanium for aircraft parts
DOI:
https://doi.org/10.46299/j.isjea.20250401.08Keywords:
detonation and plasma coatings, friction, structure, intermetallic, heat resistance, titanium alloyAbstract
The structure of the coating-substrate interface was studied by optical microscopy, and the high quality of the coatings was shown. The absence of discontinuities at the border between the base metal and the coating, there are no large pores and voids in the structure of the coatings - this indicates the necessary level of quality coatings during sputtering. The specified factors can ensure the required level of mechanical characteristics of coatings, including tribotechnical ones. Comparative studies of the behavior of detonation and plasma coatings under conditions of dry friction in pairs with titanium alloy OT4 and stainless steel 07X16Н6 were conducted. The specified friction tracks on the surface of the coating and the counterbody differ significantly for different materials. The analysis of their surface allows us to conclude that the coating behaves differently in friction with steel. It was established that the presence of nitride and oxide coatings in the structure improves friction characteristics during operation. It was established that the most susceptible to seizure are the pairs containing the metals of the same name. The coating with a structure of an intermetallic matrix with inclusions of solid phases in the form of titanium and aluminum nitrides and oxides has the highest indicators. Oxidation of detonation and plasma coatings at a temperature of 900 0C in an air environment was investigated. It is shown that the developed detonation and plasma coatings have a higher resistance to oxidation than titanium alloy VT-16 without coating. The obtained results showed the possibility of using detonation coatings based on the titanium-aluminum system with increased tribotechnical properties and heat resistance in machine building and the aerospace industry.References
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