Study of Nano-Titania Addition on Mechanical Strength of Mullite-Bonded Alumina-Silicon Carbide Nano-Composites

Authors

Materials Group, Faculty of Engineering, Shahrekord University, Shahrekord, Iran

Abstract

In this study, the effect of nano-titania addition on the mechanical strength of mullite-bonded alumina-siliconcarbide nano-composites was investigated. To this end, the gel-casting process via nano-silica sol was used for shaping the nano-composite.The firing temperature of composition was determined by use of STA. The compressive and bending strengths of samples were measured after firing at 1300 °C. Besides, the physical properties, phase composition and microstructure of the composites were evaluated after firing. The results showed that the use of nano-titania up to 1 wt.% had a higher effect on improvement of nano-composite mechanical strength. The nano-titania addition led to increasing of mullite phase and higher growth of its needle-like grains. Enhancing of ceramic bonds between grains and the improvement of mechanical strength were obtained by increasing the mullite phase.

Keywords

References

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Journal of Advanced Materials in Engineering (Esteghlal)
Volume 34, Issue 3
December 2015
Pages 49-58

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