Evaluation of Wear of Gas-Flame and Ion-Plasma Sealing Coatings with 0.3% Yttrium under Thermomechanical Loading Conditions
Fasol Y.O. Kubich V.I. Cherneta O.G. Yurov V.M. Rabatuly M.
2025Abylkas Saginov Karaganda Technical University
Material and Mechanical Engineering Technology
2025#2025Issue 410 - 15 pp.
The article presents the results of investigation of tribological characteristics of gas-flame and ion-plasma sealing coatings of KNA-82 system with yttrium content of 0.3% used in gas turbine engine assemblies. The tests were carried out in four stages modelling different operating conditions: without heating (22°C), under medium heating (350°C), after the samples were aged at 1100°C and after repeated high-temperature loading. To evaluate the wear resistance of the coatings, linear wear, reduced wear and conditional linear wear were analysed as a function of temperature and pressure in the contact zone. It was found that both types of coatings show a tendency to stabilise the wear process under thermomechanical loading. It was found that at 1100°C the wear of ion-plasma coating is 10% lower than that of gas-flame coating under constant mechanical loading and 34% lower under step loading. A significant difference in the behaviour of the coatings was found: the gas-flame coating shows a hyperbolic decrease in the reduced wear with parallelism of the curves in the range of 350-1100°C, which indicates the stability of the wear mechanism, whereas the ion-plasma coating is characterised by instability of the wear mechanism with pressure and temperature changes.
gas turbine engines , high-temperature resistance , KNA-82 , sealing coatings , thermomechanical loading , tribotechnical characteristics , wear resistance , yttrium
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National University Zaporozhye Polytechnic, Zaporozhye, Ukraine
Dnieper State Technical University, Kamenskoye, Ukraine
Vostok LLP, Karaganda, Kazakhstan
Abylkas Saginov Karaganda Technical University, Karaganda, Kazakhstan
National University Zaporozhye Polytechnic
Dnieper State Technical University
Vostok LLP
Abylkas Saginov Karaganda Technical University
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