Low‐temperature aging of Y‐TZP ceramics

Jérôme Chevalier (1) , Bernard Cales (2) , Jean Michel Drouin

1 MATEIS - Matériaux, ingénierie et science [Villeurbanne]
2 Laboratoire de Chimie du Solide

The isothermal tetragonal-to-monoclinic transformation of a 3Y-TZP ceramic is investigated from 70° to 130°C in water and in steam by X-ray diffraction and optical interferometer techniques. Aging kinetics followed by X-ray diffraction are fitted by the Mehl–Avrami–Johnson law, suggesting nucleation and growth to be the key mechanisms for transformation. Optical interferometer observations of highly polished samples effectively reveal a nucleation and growth micromechanism for tetragonal-to-monoclinic transformation. A model based on surface change analysis is developed that fits closely to the X-ray diffraction results.

Domaines: Matériaux

Jérôme Chevalier, Bernard Cales, Jean Michel Drouin. Low‐temperature aging of Y‐TZP ceramics. Journal of the American Ceramic Society, 1999, 82 (8), pp.2150-2154. ⟨10.1111/j.1151-2916.1999.tb02055.x⟩. ⟨hal-01677824⟩