METHOD OF MAKING CERAMICS BASED ON SILICON CARBIDE, REINFORCED WITH SILICON CARBIDE FIBRES Russian patent published in 2020 - IPC C04B35/577 C04B35/645 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing ceramic composite from silicon carbide reinforced with silicon carbide fibre, which can be used for operation in acidic and aggressive media, in conditions of high temperatures and prolonged mechanical action. Method of producing ceramics involves mixing silicon carbide powder containing sintering additive in form of aluminium and yttrium oxides with silicone carbide fibres obtained by siliconisation. Dried mixture was added 3 wt. % of 10 % solution of polyvinylpyrrolidone is moulded preform bilateral cold uniaxial pressing, followed by sintering by hot pressing at 1850 °C with a maximum specific pressure of 30 MPa.

EFFECT: method allows to obtain densely sintered ceramic materials having strength up to 524 MPa, a fracture toughness K_IC = 6,1 MPa⋅m^1/2.

1 cl, 2 ex, 1 tbl, 2 dwg