抄録
The X-ray diffraction method was used to measure the phase stress in composite ceramics of zirconia mixed with 20 and 40 wt% alumina which were subjected to elastic bending. The phase stress in each phase was determined from the diffractions of Al2O3 (146), Al2O3 (1.0.10) and ZrO2 (133). The phase stress increased in proportion to the applied stress; the proportional constant was larger for Al2O3 than for ZrO2. The macrostress calculated from the phase stresses by using the rule of mixture was nearly equal to the applied stress. The theoretical calculation based on the self-consistent model of elastic deformation of composites gave a lower phase stress to Al2O3 and a higher phase stress to ZrO2 when compared with the experimental results. The theoretical analysis should be elaborated to include the influences of the free surface and the third phase on phase stresses.
