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Though the martensitic transformation in zirconia has been the object of avery large number of studies for the last decades, qualitative and quantitativeobservations of the formation and growth of relief induced by low temperaturetreatments has hardly ever been reported. In the first part of the study, wehave demonstrated the excellent agreement between the atomic force microscopyquantitative observations and the outputs of the calculations derived from thephenomenological theory of martensitic transformation. The intermediate stagesof transformation were nonetheless not considered. In this second part, thegrowth mechanisms of monoclinic phase resulting from the martensitictransformation in ceria-stabilized zirconia (10 mol% CeO2) are investigated.Surface transformation is induced by ageing treatments in water vapor at 413 K.The observations are rationalized by the recent analysis proposed for thecrystallographic ABC1 correspondence choice, where the ct axis transforms tothe cm axis. Three growth modes are observed and interpreted in terms oftransformation strains accommodation. Microcracks formation is observed,explaining grain pop-out where the crystallographic disorientation between twoadjacent grains is the largest. The influence of grain boundary paths on thesurface relief features is demonstrated. Overall, our results strongly supportthe non-existence of a critical grain size for low temperature transformation,confirmed by the classical thermodynamics theory applied to this particularcase.

Martensitic transformation in zirconia. Part II: Martensite growth