In-Flight Analysis and Microstructural Evaluation of CoNiCrAlY Coatings Deposited by HVPS
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2018-01-01
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Asm International
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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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International Thermal Spray Conference And Exposition (itsc 2018). Materials Park: Asm International, p. 24-27, 2018.