Surface strengthening of a polymer composite by detonation spraying
V.I. Pavlenko, D.V. Pushkarskaya, V.V. Kashibadze, V.V. Sirota, S.V. Zaitsev, D.S. Prokhorenkov, A.S. Churikov
Shukhov Belgorod State Technological University, Belgorod, Russia
Keywords: detonation spraying, fluoroplastic composite, tungsten carbide, protective coating, microscopy
Abstract
This paper presents the results of experiments to strengthen the surface of a fluoroplastic composite by creating a protective layer. The protective layer was formed by detonation spraying of VSNGN-85 powder consisting mainly of WC (81.56 wt.%) and Ni (10.6 wt.%). The granulometric and morphological properties of VSNGN-85 powder were studied, and its X-ray diffraction analysis was carried out. Optimal spraying modes for obtaining a dense coating 100÷115 mu thick were selected. X-ray diffraction analysis showed the presence of WO3 tungsten oxide and NiWO4(II) nickel tungstate in the coatings. The microhardness of the composite material with the protective coating was found to be 48 times higher than the microhardness of the composite without coating. The applied coating increases the life of the fluoroplastic composite, improves its strength, and slows down the processes of its oxidation, corrosion, and thermal destruction.
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