Moscow Aviation Institute (National Research University), Moscow, Russia

L. N. Lesnevsky, Professor of the Department of Aircraft Engine Manufacturing Technology, Doctor of Technical Sciences, e-mail: l.lesnevskiy@yandex.ru
I. А. Nikolaev, Senior Lecturer of the Department of Aircraft Engine Manufacturing Technology, Candidate of Technical Sciences, e-mail: nikolaevia@mai.ru

The A. Lyulka Development Bureau, a branch of PJSC ODK-UMPO, Moscow, Russia
V. S. Teplyakov, Deputy Head of the Development Bureau, e-mail: focuss77@mail.ru

LLC TSPC — Technological Systems of Protective Coatings, Moscow, Russia
D. А. Trusov, Leading Process Engineer, e-mail: d.trusov@tspc.ru

Based on the use of domestic and foreign sources in relation to the hightemperature operating conditions of the main modules of gas turbine engines, typical compositions of various wear-resistant self-lubricating coatings and coatings of the “solid lubricant” type are considered, and brief results of comparing the most effective modern gas thermal methods of their application are presented. It is shown that there is a great need to study the characteristics of wear resistance and the use of self-lubricating composite coating systems for a wide temperature range, the matrix of which may consist of heat-resistant nickel alloys, intermetallides and ceramics, depending on the purpose of the high-temperature friction units of the engine and the requirements to ensure their service life and reliability. The obtained research results and international experience indicate the successful practical use of matrix composite materials (nickel, intermetallic and ceramic) and high-temperature solid lubricants consisting of mixtures of simple and complex oxides, fluorides and silver as additives providing synergy of their lubricating properties. The following requirements for the basic, specified operational tribotechnical characteristics of composite self-lubricating high-temperature coatings are considered as promising for use in matrix materials and additives: low friction (coefficient of friction <0.2); high wear resistance (wear rate <10–6 mm³/Nm) and a wide temperature range (from room temperature to high temperature above 1500 ^oC). Thus, approaches to ensuring the wear resistance and fretting resistance of friction pairs of high-temperature components of gas turbine engines through the use of composite self-lubricating coatings are considered. It is proposed to study the issues of designing self-lubricating composite coatings in relation to the operating conditions of various high-temperature friction units of gas turbine engines in order to increase their reliability and service life.

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