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Registration Number

0221U101453, 0118U003596 , R & D reports

Title

Development of multi-functional coating compositions and technologies for their application to critical parts of gas turbine engines of dual-use aircrafts

Head

Ershov Anatoliy V, Доктор технічних наук

Registration Date

21-01-2021

Organization

Zaporizhzhya National Technical University

Description

 In this work, the phase composition and structure of sealing coatings of various compositions operating under conditions of 1100 C were investigated. According to the results of the study of heat resistance, it was found that the best results in resistance to high-temperature corrosion are demonstrated by the coating of composition No. 3. It is shown that at a contact temperature of 1400 K, which is formed when the particles are heated to the boiling point of iron and a particle size of 8 mcm, the adhesion strength on the juvenile surface increases to the level of the base strength. For particles with a temperature of 2735 C, the level of contact temperature for several microseconds significantly exceeds the melting point of the oxide film, which is a necessary condition for wetting it and ensuring complete physical contact with the coating particle. The proposed cohesive-oxide model of adhesion strength takes into account the effect of an oxide layer between the coating and the substrate. In contrast to the existing strength model, the new model takes the surface of the oxide layer as a substrate, rather than the surface of the metal. The overwhelming presence of iron oxide FeO in the composition of the oxide layer is taken into account. The strength of the contact zone should be equal to the cohesive strength of the substrate oxide layer. The rational mode of ion-plasma nitriding of the airfoil of the compressor rotor blade has been determined. In terms of the plasticity of the surface layer, the blades treated according to the P1 mode have the best parameters

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Yershov Anatoliy V.
Greshta Viktor L
Zelenina Olena A
Klymov Olexandr V.
Kybich Vadim I.
Pavlenko Dmytro V.
Seidametov Stanislav V.
Sotnikov Yevhenii G.
Tkach Daria V.