This study measured the Vickers hardness of ceramics, and Weibull statistical analysis was used to evaluate the reliability of the measured data. The specimens were heat-treated for 0.5, 1 and 10h at temperatures of 1473K, 1573K and 1673K, and were co...
This study measured the Vickers hardness of ceramics, and Weibull statistical analysis was used to evaluate the reliability of the measured data. The specimens were heat-treated for 0.5, 1 and 10h at temperatures of 1473K, 1573K and 1673K, and were corroded for 400 hours in acidic and alkaline solutions. The specimens were as follows: Al₂O₃ ceramics were prepared with different amount of SiC added to evaluate crack healing ability. Y₂O₃ added 3 wt.%. The 2-parameter Weibull probability distribution can be applied to the Vickers hardness. In the Weibull statistical analysis of the corroded Al₂O₃ composite ceramics, the shape parameters and scale parameters can be used to determine the dispersion and to predict the strength/hardness.