Effect of Nano-Oxide Addition on Mechanical Properties of Alumina-Mullite-Zirconia Composites

Abstract:

This work reports on the effect of CeO₂ and Cr₂O₃ addition on the mechanical properties of Al₂O₃-mullite-ZrO₂ composites. The amount of additives added was 1.5wt%CeO₂, 1.5wt%Cr₂O₃ and the mixture of 1.5wt%CeO₂ and 1.5 wt%Cr₂O₃. Bulk composites have been sintered by using pressure-less sintering method. Phases, microstructure, density and porosity of sintered composites were characterized. Flexural strength and fracture toughness were also determined. The results from mechanical tests showed that the highest flexural strength was obtained with the mixture of CeO₂ and Cr₂O₃ addition, while the highest fracture toughness was obtained with CeO₂ addition.

• Periodical: Advanced Materials Research (Volume 1102)
• Pages: 87-90
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1102.87
• Online since: May 2015
• Authors: Anurat Poowancum, Sukasem Watcharamaisakul*
• Keywords: Alumina-Mullite-Zirconia Composite, Fracture Toughness, Oxide Nanoparticles, Toughness

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