FIELD: technological processes.
SUBSTANCE: group of inventions relates to thermal protection and antioxidation coatings and can be used to increase chemical inertia and operating temperature of articles used in aerospace industry, fuel and energy complex, in chemical industry, etc. Product is characterized by presence of base from graphite, in which near-surface modified layer consists of graphite of base and silicon carbide. Near-surface layer is obtained by substituting part of the graphite of the base with silicon carbide to form a branched dendritic crystal structure of silicon carbide inside the graphite. Modification of the article surface is carried out in a vacuum furnace by providing the thermochemical heterogeneous reaction of the base graphite with the silicon melt in contact with the base surface and carbon monoxide fed into the vacuum furnace. Said reaction is accompanied by substitution of part of graphite of base with silicon carbide to form branched dendritic crystal structure of silicon carbide inside graphite.
EFFECT: near-surface layer formed according to the proposed method is retained in the base due to branched dendritic intrusion of silicon carbide into the graphite of the base, providing higher strength characteristics, chemical and thermal resistance of the articles.
8 cl, 9 dwg
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