... 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 , 36 , 37 , 38 , ... Vol 35 , 1995, p 1 433 33 . J.W. Hutchinson and P.C. Paris, in Elastic-Plastic Fracture, ASTM STP 668, 1979, p 37 34 . I. Narisawa and M.T. Takemori, Polym. Eng. Sci., Vol 29, 1989, p 671 35 . ... 50 Si 3 N4 5 MDBT 70 3. 5 CSF 72 4 DCB 72 SiC NC2 03 (Norton) 4.5 ISB 73 3 CN, CSF 50 3. 3 SENB 68 α-SiC (Carborundum) 2.7 CN 68 NiAl polycrystalline 1.75 MDBT 75 Y-PSZ 3. 6 SENB...