Thermal spraying is a widely used technology for industrial applications to provide coatings that improve the surface characteristics. According to the specificities of processes (APS, VPS, flame, electric arc), any kind of material can be sprayed. Among materials, ceramic coatings present several interesting aspects such as wear resistance, corrosion protection as well as thermal or electrical insulation; particularly alumina coatings which appear as the most commonly used. From all spraying processes, atmospheric plasma spraying (APS) is a rather well-established process but some others can also be used with a lower economical impact such as the flame technology. The aim of this study was to analyze the alumina coating properties according to the technology employed such as APS or wire flame spraying using the Rokide™ and the Master Jet® guns. After micrographic analyses by SEM, physical and mechanical properties were measured considering the thermal conductivity and the hardness.
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Acknowledgments
This study was realized with the collaboration of SNECMA. Authors gratefully thank such company as well as St Gobain (and more precisely Mr. P. Fournier) for the availability of the Rokide™ as well as the Master Jet® processes. The authors would like to express their thanks to Ms. F. Moitrier and A. Lidolff for all the works carried out during their training period. LERMPS is member of the Institut des Traitements de Surface de Franche-Comté (ITSFC, Surface treatment institute of Franche-Comté), France.
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This article is an invited paper selected from presentations at the 2007 International Thermal Spray Conference and has been expanded from the original presentation. It is simultaneously published in Global Coating Solutions, Proceedings of the 2007 International Thermal Spray Conference, Beijing, China, May 14-16, 2007, Basil R. Marple, Margaret M. Hyland, Yuk-Chiu Lau, Chang-Jiu Li, Rogerio S. Lima, and Ghislain Montavon, Ed., ASM International, Materials Park, OH, 2007.
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Costil, S., Verdy, C., Bolot, R. et al. On the Role of Spraying Process on Microstructural, Mechanical, and Thermal Response of Alumina Coatings. J Therm Spray Tech 16, 839–843 (2007). https://doi.org/10.1007/s11666-007-9081-0
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DOI: https://doi.org/10.1007/s11666-007-9081-0