Characterization of Three-Dimensional Through-Thickness Transformation Zone in 9-mol%-Ce–TZP Ceramics |
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| Authors: | Tianshun Liu |
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| Affiliation: | Advanced Materials Program, Australian Nuclear Science and Technology Organization, Lucas Heights, Menai, New South Wales 2234, Australia |
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| Abstract: | The through-thickness t–m transformation zone was characterized in two 9-mol%-Ce–TZP ceramics with 1.6- and 2.2-μm grain size. Short, double-cantilever-beam (sDCB) specimens were used to measure the crack-resistance curves ( R -curves). After the R -curve measurements were made, the sDCB specimens were cut through the thickness, and the t–m transformation zone was characterized. The stress-induced t–m transformation zone remained nearly the same shape and size through the thickness, but the amounts of the t–m transformation at the two free surfaces were much higher than inside the specimens. The results are discussed based on fracture mechanics. |
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