Microstrain and the Mechanism of the Reversible Monoclinic ⇌ Tetragonal Phase Transformation in Zirconia
The Warren-Averbach method was used to evaluate the microstrain involved in the monoclinic ⇌ tetragonal transformation of ZrO2. As the transformation proceeds microstrain reaches a maximum of 1.9 x 10-3 when 50% of the monoclinic phase has been transformed. Similar behavior was found on cooling. A large hysteresis in microstrain was observed in this transition. The extent of the coherent interface between two phases could explain the behavior of microstrain.
KeywordsTetragonal Phase Monoclinic Phase Coherent Interface Transformation Region Coherent Domain Size
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