PREPARATION OF Si3N4-ZrO2 CERAMIC COMPOSITES BY SELF-PROPAGATING HIGH-TEMPERATURE SYNTHESIS

Results are provided for a study of Si3N4-ZrO2 composite ceramic material preparation by self-propagating high-temperature synthesis from ferrosilicon and zirconium concentrate. It is noted that as a result of high-temperature dissociation of ZrSiO4 silicon dioxide is nitrided with formation of silicon oxynitride and it is condensed in surface layers of a specimen in the form of filamentary crystals.