Abstract
Crack propagation in SiC-whisker-reinforced MoSi2 was studied. In particular, the deflection angles of the cracks were examined to determine the degree to which they are affected by the whisker reinforcement. The composite studied was hot-pressed MoSi2 with 20 vol% vapor-liquid-solid β-SiC whiskers. A substantial difference was found between the deflection angles of cracks formed in the reinforced MoSi2 and those in a control sample with no whiskers, showing the process of crack deflection as an important, but not the only, toughening mechanism.
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