A novel method for synthesis of β-Sialon/Ti(C, N) composites using nitridation of Ti3SiC2 powder

摘要

In this investigation, we have employed a novel approach to fabricate beta-Sialon/Ti(C, N) composites through the nitridation treatment of Ti3SiC2 powder. At temperatures ranging from 1373 to 1773 K, the reaction process was subjected to a comprehensive analysis to explore the transformation of phase and microstructure. The findings unequivocally highlight the influence of alpha-Al2O3 presence and the high specific surface area of Ti3SiC2 powder, resulting in distinctive phase and structural evolutions post nitridation, distinctly different from those observed in bulk Ti3SiC2. The beta-Sialon/Ti(C, N) composites produced via this innovative method exhibit uniform local chemical composition and meticulous regulation of grain morphology. Moreover, the synthesis mechanism of beta-Sialon/Ti(C, N) composites under nitrogen ambiance was thoroughly discussed. This straightforward approach has the potential for extensive-scale synthesis of beta-Sialon/Ti(C, N) composites, offering promising avenues for their application in developing high-performance refractories or structural ceramics tailored to withstand severe high-temperature environments.

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