The tranformation driving force for indentation cracking in phase-transformation-toughened ZrO2 ceramics is confirmed with the direct crack measurement method. This driving force is produced by expansion of the plastic zone beneath the indenter due to stress-induced transformation, and it promotes the extension of the indentation cracks. The driving force cannot be neglected when evaluating the indentation fracture toughness of the materials.
Origin
Tshinghua University, China
Journal Title
J Am Ceram Soc 76 12 1993 3144-3146
Sector
Glass Ceramics
Class
GC 155