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2213 |
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Tuesday, May 04, 2010, Hullet Room 4:20 PM Cold Spraying 4 |
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Comparison of cold spray and detonation spraying coating properties |
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Igor Smurov* / Ecole Nationale d'ingénieurs de Saint-Etienne (ENISE), France Vladimir Ulianitsky / Lavrentyev Institute of Hydrodynamics SB RAS, Russia Segrey Zlobin/ Lavrentyev Institute of Hydrodynamics SB RAS, Russia Aleksey Sova/ Ecole Nationale d'Ingénieurs de Saint-Etienne (ENISE), DIPI Laboratory, France |
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Cold and detonation spraying methods are based on the interaction of high-velocity particles with substrate. High quality coatings from various powder materials can be deposited. In both processes, the substrate experiences insignificant thermal effect. Thermally sensitive powder can be sprayed with no oxidation and decomposition. The initial powder microstructure and even nanostructure can be preserved under properly selected spraying conditions. This study is based on a comparative analysis of the mechanical, electrical, heat transfer properties, and microstructure of a series of coatings deposited by cold and detonation spraying technologies. The coatings are produced from copper, 5083 aluminum, and 5083 nanostructured aluminum powders using a commercial Cold Spray equipment CGT-4000 and an original computer-controlled detonation spraying installation developed by the authors. The coatings and coating/substrate interfacial regions are examined by optical microscopy. The coating microhardness, porosity, electrical and heat conductivity are measured and compared. Particular advantages and drawbacks of both spraying methods are discussed. |