Mechanical properties of cubic zirconia irradiated with swift heavy ions |
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Authors: | V Menvie Bekale C Legros S Poissonnet |
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Affiliation: | a Universite Paris-Sud, LEMHE/ICMMO, UMR 8182, Bâtiment 410, F-91405 Orsay cedex, France b DEN/DANS/DMN/SRMP, CEA Saclay, 91191 Gif-sur-Yvette cedex, France c Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, CNRS/IN2P3/Université Paris-Sud, Bâtiment 104-108, F-91405 Orsay cedex, France |
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Abstract: | The modifications of the mechanical properties of cubic (yttria-stabilized) zirconia induced by swift heavy ion irradiation are investigated. Polycrystalline pellets were irradiated at room temperature with 940 MeV Pb ions at the GANIL accelerator in Caen at fluences ranging from 5 × 1011 to 4 × 1013 cm−2. The microhardness and the fracture toughness of irradiated YSZ were studied by Vickers micro-indentation. Although YSZ is damaged by irradiation, an increase of the microhardness and fracture toughness with increasing ion fluence is observed. A strengthening of YSZ, associated with residual compressive stresses induced in the surface layer by irradiation, explain these results. |
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