Study of changes in the heat-resistant alloy coating structure after heat resistance tests

Movenko D.A., Medvedev P.N., Smirnov A.A.
UDC
669.018.44
DOI
10.18577/2307-6046-2018-0-11-64-73
Article PDF (Russian) (1001.06 KB)
How to cite
Movenko D.A., Medvedev P.N., Smirnov A.A. Study of changes in the heat-resistant alloy coating structure after heat resistance tests // Proceedings of VIAM. 2018. No. 11. DOI: 10.18577/2307-6046-2018-0-11-64-73. URL: https://test.viam.ru/en/journal/2018/11/8
Keywords
heat shield, rhenium-containing nickel alloy, diffusion interaction, isothermal heat resistance, ceramic coating layer, heat resistant coating layer
Abstract

The material of the heat-resistant alloy with a heat-resistant coating (Ni–Cr–Al–Ta–Re–Y–Hf)+(Al–Ni–Y)+(Zr–Gd–Y–O) was investigated. It is shown that as a result of vacuum annealing at 1050°C/3 h, interaction zones between components of the coating and the substrate alloy form in the structure of the material due to their mutual diffusion. After heat-resistant tests of 1200°C/100 h, the coating loses its layered structure, the morphology of the structural components changes, the composition of the main elements of the coating is aligned with its depth, which indicates the complete flow of diffusion processes.

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