COMPOSITE MATERIAL BASED ON A FRAMEWORK OF A VOLUMETRIC STRUCTURE AND DISPERSED-HARDENED NANO- AND/OR ULTRAFINE PARTICLES OF REFRACTORY COMPOUNDS OF A CARBON OR CARBON-CERAMIC MATRIX AND A METHOD FOR ITS PREPARATION Russian patent published in 2022 - IPC C04B35/80 C04B35/577 C04B35/528 

FIELD: composite materials.

SUBSTANCE: invention relates to abrasive and oxidation-resistant materials designed for operation at high temperatures, heat stroke, oxidizing environment and abrasive action. The composite material is made on the basis of a framework of a volumetric structure and a carbon or carbon-ceramic matrix dispersed with nano- and/or ultrafine particles of refractory compounds. In it, between the rows of carbon rods of the horizontal direction and in the cells formed by carbon rods of the horizontal and vertical directions, there is a non-woven carbon fiber material made of fibers fragmented in length and thickness, and nano- and/or ultrafine particles are located between the fibers of the non-woven material and on its surface and can be located on the surface of carbon rods. To obtain a composite material, rows of carbon rods of the horizontal direction with or without a coating of nano- and/or ultrafine particles formed on their surface are laid out between metal rods of the vertical direction, alternating their laying with stringing on metal rods of the vertical direction of blanks of non-woven carbon fiber material pre-impregnated with a suspension of nano- and/or ultrafine particles. After the package is set to the required height, it is pressed with a perforated plate, through the holes of which metal rods of the vertical direction pass, after which the metal rods are replaced with carbon ones with or without a coating of nano- and/or ultrafine particles.

EFFECT: increase the service life of the composite material of relatively thick-walled products designed for long-term operation under the influence of an abrasive and oxidizing environment (or for a short time, but under particularly difficult operating conditions).

2 cl, 8 dwg