Yasuo Kogo1, Yutaka Kagawa2 and Hiroshi Hatta1
1Institute of Space and Astronautical Science, Sagamihara
Fracture toughness of SiC whisker and ZrO2 particle reinforced alumina matrix composite was investigated under modeI and modeII loading conditions.
Under modeI loading condition, the critical stress intensity factor increased with increasing ZrO2 volume, which well agreed with theoretical estimation. It was also shown by the theoretical analysis that the transformation of ZrO2 was less effective to the toughness of the composite under modeII loading, which was consistent with the experimental results.
ceramic matrix composites, fracture toughness, transformation toughening, martensitic transformation, mode II loading condition
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