Dynamic fracture toughness in ceramics and ceramics matrix composites

✍ Scribed by T. Kishi

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 485 KB
• Volume: 40
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(91)90235-s

✦ Synopsis

Ahatract-The dynamic fracture toughness K,,, of ceramics and ceramics matrix composite was evahrated both by the strain gage method and by the load deconvolution method over a wide range of loading rates using both conventional Instron-type and the newly developed drop-type impact testing machines, and the result was compared with the two-dimensional dynamic finite element method. Six kinds of ceramics were tested: fine and coarse grained alumina, tetragonal xirconia polycrystal (TZP), silicon carbide, silicon nitride and sialon. Two kinds of Sic whisker and ZrO, particle-reinforced Also, matrix composites were also tested. Lastly, the effect of operating temperature on dynamic fracture toughness was examined.