Crack Branching in Transformation-Toughened Zirconia |
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| Authors: | H.P. KIRCHNER R.M. GRUVER M. V. SWAIN R. C. GARVIE |
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| Affiliation: | Ceramic Finishing Company, State College, Pennsylvania 16801;CSIRO, Division of Materials Science, Melbourne, Victoria, Australia |
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| Abstract: | Crack propagation and branching were investigated in calcia partially stabilized zirconia aged at 1300°C for various times. The crack-branching radii were measured and used to calculate the apparent stress intensity factors at crack branching ( K8 ) which increase with increasing aging time. The KB/KIC ratios increased with aging time with a maximum of 5.3. This maximum ratio is much greater than the ratios previously observed for ceramics. |
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