Structure and properties of multilayer coatings based on CoCrAlY/Al2O3 obtained by detonation spraying

Ceramic coatings are used to protect against high-temperature oxidation of metal products. The efficiency of the technology of detonation spraying of two-layer coatings of aluminum oxide ( Al2O3 ) and a heat-resistant alloy (CoCrAlY) on the surface of a sample made of steel 12X18H10T was studied. A...

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Bibliographic Details
Published in:Eurasian journal of physics and functional materials 2022-09, Vol.6 (3), p.234-243
Main Authors: Rakhadilov, B. K., Tyurin, Yu. N., Kolisnichenko, O. V., Kakimzhanov, D. N., Zhurerova, L. G.
Format: Article
Language:English
Subjects:
al2o3
cocraly
detonation spraying
hardness
multilayer coating
phase composition
roughness
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Summary:Ceramic coatings are used to protect against high-temperature oxidation of metal products. The efficiency of the technology of detonation spraying of two-layer coatings of aluminum oxide ( Al2O3 ) and a heat-resistant alloy (CoCrAlY) on the surface of a sample made of steel 12X18H10T was studied. A multi-chamber detonation unit was used in the work, providing high speed (up to 1000 m/s) and a 60–80% utilization rate of the sprayed material. We used an oxygen-neutral combustible mixture based on propane-butane. The coating material has a smooth gradient of properties from ceramic to sample substrate The complex of the obtained structural and physical-mechanical properties of the coating material makes it possible to predict its high performance under conditions of high-temperature oxidation.
ISSN:2522-9869
2616-8537
DOI:10.32523/ejpfm.2022060308