Study on Aging of Tetragonal Zirconia by Coupling Impedance and Raman Spectroscopies in Water Vapor Atmosphere

Elisabeth Djurado (1) , Florence Boulc'H (1) , Laurent Dessemond (1) , Noël Rosman (1) , Michel Mermoux (1)

1 LEPMI - Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces

This paper presents experimental data on study of aging nanostructured and tetragonal single-phased 2.5 mol % Y₂O₃-doped ZrO₂ ceramics at 250°C for 1000 h in a steam atmosphere. An excellent stabilization of tetragonal zirconia polycrystalline ceramics was obtained contrary to the present literature, probably due to favorable microstructural characteristics of the materials. In situ impedance and Raman spectroscopies have been coupled to correlate the electrical properties and phase content in order to provide new insight into the mechanism of monoclinic degradation.

Mots clés: zirconium compounds; yttrium compounds; ceramics; ageing; electrochemical impedance spectroscopy; Raman spectra; impurity distribution; crystal microstructure

Domaines: Matériaux

Elisabeth Djurado, Florence Boulc'H, Laurent Dessemond, Noël Rosman, Michel Mermoux. Study on Aging of Tetragonal Zirconia by Coupling Impedance and Raman Spectroscopies in Water Vapor Atmosphere. Journal of The Electrochemical Society, 2004, 151 (5), pp. A774-A780. ⟨10.1149/1.1697401⟩. ⟨hal-00417924⟩