HIGH TEMPERATURE NOTCH FLEXURE STRENGTH AND ITS PROBABILITY DISTRIBUTION OF Al₂O₃ /TiC CERAMICS

Notch flexure strength of Al₂O₃ /TiC ceramics was tested at 20, 600and 800. Results show that the flexure strength keeps constant up to 600, and notch flexure strength can be calculated by equation(3). At 800, the flexure strength decreases, and the notch flexure strength doesn't obey equation (3) as the notch sensitivity decreases. The probability tests at high temperature show that the flexure strength and notch flexure strength follow Weibull distribution. The Weibull modules of various Kt are a constant at the same testing temperature. The dispersion of the values of flexure strength and notch flexure strength at 800 is lower than that at 20.