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1138 |
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Wednesday, June 04, 2008, Auditorium 2 8:40 AM Cold Spraying 1 Everything around this young thermal spraying technique, possible applications and latest developments for equipment of high pressure and low pressure cold spraying, models and simulations for a deeper process knowledge |
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Investigation of composite: metal?ceramics and metal?metal coatings produced with cold spray process
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Anatolii Papyrin* / Cold Spray Technology, USA Vladimir Kosarev/ ITAM of RAS, Russia Sergey Klinkov/ ITAM of RAS, Russia Alexey Sova/ ITAM of RAS, Russia Igor Smurov/ ENISE, France Philippe Bertrand/ ENISE, France |
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This paper presents some results of investigation of cold spraying various composites: metal-ceramics, metal-metal including Al-Al2O3, Cu-Al, and others. The objective was to observe effect of spray parameters of one component on the process of the coating formation of the mixture. For this purpose the installation was equipped with two powder feeders and two powder feed ports. The first one was located in a pre-chamber and second one working as an ejector in supersonic part of the nozzle. Varying the powder injection location of any component allowed us to change the spray parameters of the mixture. An influence of powder feed rate, particle velocity, temperature and size on the microstructure and deposition efficiency is studied. It is shown that an addition of ceramic or metal powder to the sprayed metal or alloy can significantly change the spray process and coating characteristics. |