In-flight analysis and microstructural evaluation of CoNiCrAlY coatings deposited by HVPS
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2018-01-01
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Caliari, F. R.
Miranda, F. S.
Filho, G. P.
Essiptchouk, A. [UNESP]
Reis, D. A.P.
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The plasma torch design affects the particle-plasma interaction, in-flight properties and the coating microstructure. When spraying metallic powders, the in-flight oxidation as well as the particle velocity and temperature determine the mechanical, corrosion and oxidation properties, which have a major impact on the in-service degradation of bond coats. This study aims to determine the microstructural and mechanical properties of as-sprayed CoNiCrAlY coatings deposited on the Inconel 718 alloy. Depositions were made using a High Velocity Plasma Spray Process (HVPS), which is based on a special plasma torch design. In-flight particle characteristics were determined to elucidate the kinetic and thermal regime of HVPS process.
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Proceedings of the International Thermal Spray Conference, v. 2018-May, p. 24-27.