High temperature mechanical properties of bauxite-based SiC-containing castables

High temperature strength and thermal shock resistance of ultra-low cement bauxite-based SiC-containing castables with two different ultra-fine alumina/microsilica ratios (Al2O3/SiO2=25/75 and 75/25) have been studied. The results show that SiC addition in the range from 4 to 16% is beneficial to improvement of mechanical properties as well as thermal shock resistance, and its effect may be correlated with microstructural features of the castables.