CERAMIC-MATRIX COMPOSITE MATERIAL HAVING HARDENED REINFORCING COMPONENT AND METHOD OF MAKING SAID MATERIAL Russian patent published in 2012 - IPC C04B35/573 C04B35/80 B82B3/00 

FIELD: chemistry.

SUBSTANCE: invention relates to engineering ceramics and can be used to make structural components operating under high mechanical loads. The ceramic-matrix composite material, having a hardened reinforcing component in form bundles of carbon filaments coated with a layer of silicon carbide, and a silicon carbide-based matrix, contains carbon filaments inside bundles joined with each other by a carbon inter-filament phase which is reinforced with carbon nanotubes. The silicon carbide layer contains nanosized grains and the matrix further contains free silicon. When producing the ceramic-matrix composite materials, bundles of carbon filaments are treated under the action of ultrasonic vibrations with a suspension containing 2-8 wt % carbon nanotubes and 5-20 wt % polymer binder in an organic solvent, after which a polymer layer is then deposited onto the bundles via treatment thereof with a suspension containing 10-30 wt % polymer binder and 3-15 wt % thermal expanded graphite. Synthesis of the matrix and silicon carbide layer containing nanosized grains on the bundles is carried out through carbonisation and siliconisation.

EFFECT: obtained material has low porosity, high flexural strength and impact viscosity; production method is suitable for mass economic manufacture of articles.

3 cl, 3 tbl, 6 ex, 2 dwg