02 October 2020 4 10K Report

It has been established that the tetragonal to monoclinic phase transformation of zirconia can be used to improve the toughness. The driving force for this transformation is the temperature gradient, which results in a change in the crystal structure of zirconia from tetragonal to monoclinic.

But, at room temperature Metastable inclusions of tetragonal Zirconia dispersed in a ceramic matrix will transform to the thermodynamically stable monoclinic form on the application of an external tensile stress, what is the driving force for such transformation to occur?

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