Thermal annealing study of swift heavy-ion irradiated zirconia

作者: Jean-Marc Costantini , Andrée Kahn-Harari , François Beuneu , François Couvreur

DOI: 10.1063/1.2198927

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摘要: Sintered samples of monoclinic zirconia (α-ZrO2) have been irradiated at room temperature with 6.0GeV Pb ions in the electronic slowing down regime. X-ray diffraction (XRD) and micro-Raman spectroscopy measurements showed unambiguously that a transition to “metastable” tetragonal phase (β-ZrO2) occurred fluence 6.5×1012cm−2 for large stopping power value (≈32.5MeVμm−1). At lower 1.0×1012cm−2, no such transformation was detected. The back-transformation from β- α-ZrO2 induced by isothermal or isochronal thermal annealing followed XRD analysis. started an onset around 500K completed 973K. Plots residual fraction deduced versus time are analyzed first- second-order kinetic models. An activation energy close 1eV process is derived either curves, using so-called crosscut...

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