DISPERSION-REINFORCED COMPOSITE CERAMIC AND PREPARATION OF COMPOSITE PARTICLE FOR DISPERSION-REINFORCED COMPOSITE CERAMIC

摘要

PURPOSE:To prepare a dispersion-reinforced composite ceramic having improved strength and toughness at room temperature to high temperatures by homogeneously dispersing specific ceramic particles in a matrix comprising silicon carbide, silicon nitride or sialon. CONSTITUTION:The dispersion-reinforced composite ceramic has the following structure. Namely, the composite ceramic comprises a matrix phase consisting of at least one of silicon carbide, silicon nitride and sailon and a dispersion phase consisting of at least one of the carbide, boride and nitride of Ti, Zr, Hf, V, Nb and Ta; the carbide and boride of Cr, Mo and W; the carbide of B; and the boride of Sr and La wherein the dispersion phase particles are homogeneously dispersed in the entire matrix phase.