Influence of Cr2AlC on the thermal shock and corrosion resistance of low carbon Al2O3-C refractory
Abstract
Incorporation of MAX phase to fabricate low-carbon refractories has been recently proposed. Among them, Cr 2 AlC was the undoubtedly one which was regarded as the most potential candidates for applications, due to the excellent chemical stability of chromium oxide . In this work, the influence of Cr 2 AlC on the thermal shock resistance and corrosion resistance of Al 2 O 3 -Cr 2 AlC-C refractories were investigated. The results indicated that the residual strength ratio still maintained stability when flake graphite content reduced from 9 wt% to 4 wt%. While the corrosion resistance of the sample with 4 wt% graphite and 5 wt% Cr 2 AlC increased approximately 40% compared with regular Al 2 O 3 -C refractories with 9 wt% graphite. The degradation mechanisms and interactions of Al 2 O 3 -Cr 2 AlC-C refractories in contact with MnO-rich slag were studied, and the role of Cr 2 AlC was elucidated.