Artículo
Fabrication and creep properties of eutectic-composition Al2O3/YAG/YSZ sintered composites
Autor/es | Huamán-Mamani, F. A.
Jiménez Holgado, C. Jiménez Melendo, Manuel |
Departamento | Universidad de Sevilla. Departamento de Física de la Materia Condensada |
Fecha de publicación | 2021-12 |
Fecha de depósito | 2024-01-11 |
Publicado en |
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Resumen | Three-phase alumina/YAG/yttria-stabilized cubic zirconia (YSZ) composites were fabricated by a solid-state reaction route starting from commercial powders of Al2O3, Y2O3 and monoclinic ZrO2. The final phases Al2O3, YAG and ... Three-phase alumina/YAG/yttria-stabilized cubic zirconia (YSZ) composites were fabricated by a solid-state reaction route starting from commercial powders of Al2O3, Y2O3 and monoclinic ZrO2. The final phases Al2O3, YAG and YSZ were obtained after calcination of the powder mixtures at 1400 °C. Dense bulk composites were obtained after sintering, with a homogeneous microstructure of fine and equiaxed grains with sizes of 1 μm. Compressive mechanical tests were performed at 1300–1450 °C in air at constant load and at constant initial strain rate. A brittle-to-ductile transition was found with increasing temperature. Grain boundary sliding is the main deformation mechanism in the ductile regime, characterized by a stress exponent of 2 and by the absence of dislocation activity and changes in grain morphology. Alumina seems to be the rate-controlling phase owing to the improvement in creep resistance by the presence of yttrium and zirconium of the other two phases. |
Agencias financiadoras | Ministerio de Ciencia e Innovación (MICIN). España |
Identificador del proyecto | MAT2009-13979-C03-01 |
Cita | Huamán-Mamani, F.A., Jiménez Holgado, C. y Jiménez Melendo, M. (2021). Fabrication and creep properties of eutectic-composition Al2O3/YAG/YSZ sintered composites. Journal of the European Ceramic Society, 41 (15), 7752-7761. https://doi.org/10.1016/j.jeurceramsoc.2021.07.055. |
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