High-Temperature Synthesis of Cast Ceramic Material Al₂O₃–Cr₂O₃ + ZrO₂

A cast oxide ceramic material consisting of Al₂O₃–Cr₂O₃ solid solution and ZrO₂ inclusions uniformly distributed in it was prepared through metallothermic SHS from highly exothermic thermite-type mixtures containing molybdenum (VI) and chromium (III) oxides and Al/Zr as a combined reducing agent. The influence of green mixture mass on the synthesis parameters, composition, and microstructure of the final products was studied. The optimal conditions for high-temperature synthesis of cast composite oxide material consisting of 80 wt % Al₂O₃, 10 wt % Cr₂O₃, and 10 wt % ZrO₂ were determined.