Abstract: The invention relates to a process for obtaining refractory antioxidative coatings on carbon-based materials and articles operating in an oxidizing environment at temperatures of up to 2000.degree. C. under thermal cycling and high-speed gas stream conditions. The process comprises the heat-treatment of the surface to be protected in silicon vapors and is characterized in that prior to said silicon vapor treatment, the surface to be protected is covered with a layer of the composition consisting of HfB.sub.2 +C powdery filler and a carboxymethyl cellulose-based binder, followed by drying under normal conditions till it is completely dry. The process is intended for oxidation protection of structural elements and articles in metallurgy, aircraft, and other industries.

Abstract: The invention relates to the field of structural materials intended for operation under conditions of thermal loading in oxidizing media and useful in working units and equipment for petroleum, chemical, aircraft, and metallurgy industries. The invention makes it possible to obtain a material having increased strength properties, heat resistant to oxidizers at a temperature over 1100.degree. C. and ensuring a desired serviceability of parts without additional protective coatings under these conditions. This is attained due to producing a material being a composition of two interpenetrating skeletons: carbon fibers and silicon carbide disposed all through the material structure; the silicon carbide skeleton being the result of interaction between the matrix carbon and silicon self-propagating from outside. The process if characterized by a relatively short production cycle associated with singly conducted operations.