Surface Strengthening of a Polymer Composite by Detonation Spraying

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 $$\mu $$ m thick were determined. X-ray diffraction analysis showed the presence of WO3 tungsten oxide and NiWO4 (II) nickel tungstate in the coating. 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 its oxidation, corrosion, and thermal degradation.