Publication: Characterization of residual compressive stresses in layered ceramics by positron annihilation spectroscopy
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2012-12
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Elsevier
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Abstract
Microstructural characterization of stress states of alumina layers subjected to residual compressive stresses was performed by positron annihilation spectroscopy (PAS). Al₂O₃-t-ZrO₂ three layered samples were appropriately designed and processed by sequential slip casting with symmetric structure. The zirconia contents inside the core layer were selected in order to generate compressive stresses of variable intensity in the outer Al₂O₃ layers. PAS results highlighted a correlation between positron annihilation parameters and microstructural changes related to the generation of residual stresses.
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Residual stress, Al₂O₃, Positron annihilation spectroscopy
Bibliographic citation
Journal of the European Ceramic Society 32 (2012), pp. 3989–3993