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Article Dans Une Revue Journal of the European Ceramic Society Année : 2024

Aging behavior of a 1.5 mol% yttria doped zirconia exhibiting optimized toughness and strength

Résumé

The aging behavior of a 1.5Y-TZP with 0.25%wt of alumina exhibiting high mechanical properties was investigated in both water vapor and in air with in situ XRD analysis. The results showed that the material exhibited a high resistance to aging in water vapor at 134°C compared to 3Y-TZP, which is explained by the addition of alumina and a lower sintering temperature. The aging kinetics were fitted by the Mehl–Avrami–Johnson law, three stages were identified corresponding to predominance of nucleation mechanism for temperatures below 180°C and above 340°C and to growth mechanism for intermediate temperatures. It was shown that for the temperature range investigated in water vapor and air, the mechanism was independent on the environment. A strong influence of the cooling rate on the tetragonal to monoclinic phase transformation was observed and discussed using a time–temperature-transformation diagram derived from the aging results in air.
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Dates et versions

hal-04297460 , version 1 (21-11-2023)

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M. Imariouane, M. Saâdaoui, Sandrine Cardinal, Helen Reveron, Jérôme Chevalier. Aging behavior of a 1.5 mol% yttria doped zirconia exhibiting optimized toughness and strength. Journal of the European Ceramic Society, 2024, 44 (2), pp.1053-1060. ⟨10.1016/j.jeurceramsoc.2023.09.041⟩. ⟨hal-04297460⟩
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