... fracture toughness and the avoidance of catastrophic failure (Ref 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30, 31, 32, 33, 34, 35, ... DIS 157 32. Source: Ref 22 4 CSF 50 2. 1 CSF 72 2. 9 DCB 72 Al 2 O3 AD90 (Coors) 2. 8 ISB 73 1.6 CSF 72 2. 1 DCB 72 Al 2 O3 sapphire (Coors) 3 ISB 73 4 CSF 72 4 DCB 72 5 ISB ... ceramic and CMC properties Material KIc (MPa ) Method Reference 2. 7 CSF 72 2. 5 DCB 72 2. 9 ISB 73 2. 4 CMDCB 50 Glass ceramic pyroceram (Corning) 2. 2 MDBT 70 2. 6 CSF 72 3.9 DCB 72...