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Mechanical properties up to 1900 K of Al2O3/Er3Al5O12/ZrO2 eutectic ceramics grown by the laser floating zone method

AutorMesa, M. Cristina; Oliete, Patricia B.; Pastor, José Y. ; Martín, Antonio ; Llorca-Martínez, F. Javier
Palabras claveDirectionally solidified eutectic ceramics
Mechanical properties
High temperature
Al2O3/Er3Al5O12/ZrO2
Fecha de publicación2014
EditorElsevier
CitaciónJournal of the European Ceramic Society 34(9): 2081-2087 (2014)
ResumenDirectionally solidified Al2O3-Er3Al5O12-ZrO2 eutectic rods were processed using the laser floating zone method at growth rates of 25, 350 and 750mm/h to obtain microstructures with different domain size. The mechanical properties were investigated as a function of the processing rate. The hardness, ~15.6GPa, and the fracture toughness, ~4MPam1/2, obtained from Vickers indentation at room temperature were practically independent of the size of the eutectic phases. However, the flexural strength increased as the domain size decreased, reaching outstanding strength values close to 3GPa in the samples grown at 750mm/h. A high retention of the flexural strength was observed up to 1500K in the materials processed at 25 and 350mm/h, while superplastic behaviour was observed at 1700K in the eutectic rods solidified at the highest rate of 750mm/h. © 2013 Elsevier Ltd.
DescripciónDirectionally Solidified Eutectics: Selected Papers from DSEC IV.
Versión del editorhttp://dx.doi.org/10.1016/j.jeurceramsoc.2013.11.013
URIhttp://hdl.handle.net/10261/120817
DOI10.1016/j.jeurceramsoc.2013.11.013
Identificadoresdoi: 10.1016/j.jeurceramsoc.2013.11.013
issn: 0955-2219
e-issn: 1873-619X
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