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7425 |
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Wednesday, May 04, 2022, Hall D 3:55 PM Young Professionals Session |
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Microstructure and wetting performance of high-pressure cold sprayed quasi-crystal composite coatings |
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Reza Jafari* / Tampere University, Finland Heli Koivuluto / Tampere University, Faculty of Engineering and Natural Sciences, Materials Science and Environmental Engineering, Finland Jarkko Kiilakoski/ Saint-Gobain Coating Solutions, France Mari Honkanen/ Tampere University, Tampere Microscopy Center, Finland Minnamari Vippola/ 1.Tampere University, Faculty of Engineering and Natural Sciences, Materials Science and Environmental Engineering / 2. Tampere University, Tampere Microscopy Center, Finland |
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High-pressure cold spraying has shown significant potential in manufacturing metallic composite coatings for a wide range of industrial applications, including wear and corrosion protection. Quasi-crystal materials, in turn, are promising candidates due to their low friction performance and microstructural features. Combining these concepts, quasi-crystal composite coatings were generated by using high-pressure cold spraying to produce functional and protective coatings. Several spray trials were done to detect the effect of compositions and size of quasi-crystal feedstock materials mixed with metal powders on coating microstructure, integrity, deposition efficiency and surface properties. A scanning electron microscope was used to examine the microstructure of the feedstock materials and composite coatings. A 3D surface profilometer was also used to investigate texture and surface properties of the coatings. The wettability of the coatings' surfaces was measured by static and dynamic water contact angles using a droplet shape analyzer. Random distribution of phases across the surface and cross-section was found to be influential on integrity, structural reliability and hydrophobic behavior of the produced cold-sprayed quasi-crystal composite coatings. |