Microstructure and fracture toughness of in-situ-toughened SiC composites
by Y.-W. Kim, Y.-I. Lim
International Journal of Materials and Product Technology (IJMPT), Vol. 18, No. 1/2/3, 2003

Abstract: Silicon carbide composites with toughened microstructure were prepared by two-step process based on liquid-phase sintering for densification and subsequent annealing for grain growth. The resulting composites consist of uniformly distributed elongated α-SiC grains, matrix-like TiC grains, and an amorphous grain boundary phase. The in-situ toughening is a result of the β-to-α phase transformation of SiC or the controlled grain growth of SiC during annealing. Crack deflection by the elongated α-SiC grains appears to account for the increased toughness of this new class of composites.

Online publication date: Sun, 21-Sep-2003

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