Research in the Field of Composite Materials Based on HCBS and Refractory Materials Based on the System Al2O3–SiO2–SiC. Part 1

Abstract

Previous research in the field of preparing SiC-containing suspensions, and also refractory materials based on them, are analyzed. The effect of SiC additive fineness in composite HCBS of the Al₂O₃–SiO₂–SiC system is studied with a predominantly high-alumina composition on the properties of materials based upon them after firing the range 1000 – 1400°C. The effect of firing temperature on specimen shrinkage and growth, and their porosity and strength in bending are studied. For specimens after firing at 1200, 1300, and 1400°C a weight increase is detected pointing to SiC oxidation with formation of SiO₂. The maximum ultimate strength in bending (110 – 130 MPa) is achieved with a firing temperature of 1200°C, and the ultimate strength in compression for specimens of all compositions after firing at 1200°C is 200 – 425 MPa.