METHODS OF FORMING COMPLEX PROFILE PRODUCTS FROM HEAT-RESISTANT CERAMIC MATERIALS BASED ON SILICON CARBIDE

Abstract

The possibility of obtaining complex-shaped mechanical engineering products based on reaction-sintered silicon carbide using two methods - mechanical processing of polymerized blanks before sintering and hot slip molding under pressure, has been studied. The obtained silicon carbide ceramic materials are characterized by a low density of about 3.04…3.07 g/cm3, a porosity of ? 1 % and a bending strength of 320…360 MPa. Materials based on silicon carbide modified with boron carbide have a density of 2.72 g/cm3, a porosity of about 1 % and a bending strength of 280 MPa.