B. N. Guzanov, N. B. Pugacheva, T. M. Bykova

EROSION RESISTANCE OF A COMBINED MULTILAYER COATING PROTECTING CRITICAL PARTS OF MODERN GAS TURBINE ENGINES

Comprehensive studies of the chemical composition, microstructure, and thickness
of a combined multilayer coating on a heat-resistant nickel alloy are presented. The distribution pattern of chemical elements over the coating thickness for all the layers, namely the inner aluminosilicated layer, the plasma sublayer, and the outer heat-insulating layer, has been established. Surface roughness was determined at all the stages of coating application and after testing.

The results of comparative tests of corrosion-erosion resistance and resistance to burn-through of a diffusion aluminosilicide coating, a two-layer heat-insulating coating, and a combined multilayer coating are presented. High heat-shielding properties of a combined multilayer coating on a heat-resistant nickel alloy have been discovered.

Acknowledgment: The research used the facilities of the Plastometriya shared access center at the IES UB RAS. It was performed according to the state assignment on theme No. AAAA-A18-118020790145-0.

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