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2975 |
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Characterization of detonation sprayed coatings |
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Alexandr Shtertser* / Lavrentyev Institute of Hydrodynamics SB RAS, Russia Vladimir Ulianitsky / Lavrentyev Institute of Hydrodynamics SB RAS, Russia Konstantin Tsarakhov/ Lavrentyev Institute of Hydrodynamics SB RAS, Russia Boris Grinberg/ Lavrentyev Institute of Hydrodynamics SB RAS, Russia |
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Characterization of coatings made with the help of Computer Controlled Detonation Spraying was performed. The applied coatings include hard alloys (WC/Co -75/25, WC/Co - 88/12, WC/Co/Cr - 86/10/4, and Cr2C3 + NiCr), aluminum oxide, nickel-chromium self-fluxing alloys, titanium, bronze, and stainless steel. Tribological investigations of coatings were provided using abrasion test (ASTM standard G65), erosion test (ASTM standard G76), and hydro-abrasive test. To make hydro-abrasive tests special device and method were elaborated based on the interaction of water jet saturated with corundum particles with a coating surface. Strength properties of coatings (microhardness and cohesion) were also measured. The obtained experimental results permit to compare wear properties of coatings revealed at different exploitation conditions. The analysis of tribological and strength properties is done in order to find a connection between them. |