Figure 4From: Threshold intensity factors as lower boundaries for crack propagation in ceramics K I0 threshold values (hatched columns) in comparison with their counterpart critical stress intensities, K Ic (unfilled columns). Refer also to [22]. In the available literature, values for reference: Al2O3 (KI0 = 2.5 ± 0.2 MPa√m); ZrO2 (KI0 = 3.1 ± 0.2 MPa√m, both values after [4]); Soda lime glass (KI0 = 0,42 MPa√m, after [11]).Back to article page