Abstract
The damage resistance and R-curve behavior of laminated ZrB2–SiC ceramic fabricated by hot-pressing were investigated using indentation-strength technique. The difference in fracture resistance properties between the monolithic and laminated ZrB2–SiC ceramics was also analyzed and results showed that obvious R-curve behavior was found in laminated ZrB2–SiC ceramic, compared with monolithic ZrB2–SiC ceramics. Moreover, the indentation strength values of laminated ZrB2–SiC ceramic were observed to be insensitive to the increases in the indentation load, which indicated that laminated ZrB2–SiC ceramic has excellent damage resistance. The improvement in damage tolerance and R-curve behavior of laminated ZrB2–SiC ceramic was attributed to the macroscopic crack deflection due to the presence of residual compressive stresses.
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