Hydrothermal Degradation of Zirconia Bioceramics: Effect of Ternary Oxide Additions

Abstract:

Phase transformation of 3Y-TZP with different ternary oxide additions (Al2O3, La2O3, Sc2O3 and CeO2) was evaluated by hydrothermal degradation tests in water vapor at 180°C. Monoclinic phase quantification from XRD patterns showed an improved degradation resistance of the specimens with oxide additions in comparison to the 3Y-TZP base material. Cross sectional sample analysis showed that, even though for all the compositions the exposed surface became saturated with monoclinic phase, the penetration of the transformation varied. Alumina-lanthana doped materials exhibited the thinnest degraded layer.

• Periodical: Key Engineering Materials (Volumes 396-398)
• Pages: 145-148
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.396-398.145
• Online since: October 2008
• Authors: Akemi A. Nogiwa-Valdez, W. Mark Rainforth
• Keywords: Hydrothermal Degradation, Phase Transformation, TZP, Zirconia

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