Publisher： Inderscience Publishers
ISSN： 0268-1900
Source： International Journal of Materials and Product Technology, Vol.18, Iss.1-2, 2003-09, pp. : 199-214
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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.
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