Fracture Strength and Dynamic Elastic Modulus of Ce‐ and Er‐TZP at Low Temperature

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Abstract
Fracture strength of TZP containing 14.5, 15.5, and 16.5 mol % CeO2 is studied using static three‐point bending at low temperature. There is 22 %–46 % increase from 300 to 77 K and 47 %–92 % increase from 300 to 4.2 K in fracture strength of Ce‐TZP. The temperature dependencies of dynamic elastic modulus and damping capacity of CeO2/Er2O3‐alloyed tetragonal zirconia ceramics (Ce‐/Er‐TZP) between 300 and 77 K are characterized using flexural vibration. System identification techniques in time domain are used to identify dynamic parameters from strain vibration signals of the ceramic samples. The results indicate that there is 15 %–22 % increase of Ce‐TZP and 9%–22% increase of Er‐TZP in dynamic elastic modulus from 300 to 77 K. The microhardness of Ce‐/Er‐TZP was measured at room temperature.