Ceramic Matrix Composite Based on Silicon Carbide with Eutectic Additives

Resumo

A composite ceramic was obtained from granular silicon carbide dispersion-hardened with eutectic additives of the system Al₂O₃–MnO–TiO₂ was obtained. The influence of the dispersed powder of the eutectic in system Al₂O₃–MnO–TiO₂ on the sintering indicators of the ceramic matrix composite based on the granular silicon carbide was studied as a function of the silicon-carbide/eutectic-additive ratio 99/1, 97/3, and 95/5 and the pressing pressure. It was determined that after firing at 1350°C and pressing under pressure 200 MPa with introduction of 5% (weight content) eutectic additive with composition A or B the porosity is equal to 5.6 and 4.1%; the strength in bending reaches 65 ± 5 and 85 ± 5 MPa, respectively.