Volume 33, Issue 2 (Journal of Advanced Materials-fall 2015)                   jame 2015, 33(2): 121-122 | Back to browse issues page

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M. Rahmani, K.Janghorban, S. Otroj. Erratum to: Effect of Yittria Addition on the Mullite-Zirconia Composites Manufactured by Slip Casting Method. jame. 2015; 33 (2) :121-122
URL: http://jame.iut.ac.ir/article-1-587-en.html
Abstract:   (3964 Views)
In this study, the effect of different amounts of Y2O3 on the properties of mullite-zirconia composites was investigated. For this purpose, these composites were fabricated by reaction-sintering of alumina and zircon as raw materials. Besides, the slip casting method was used for forming these composites, and sintering process was carried out at 1600 °C. Then, the physical and mechanical properties, phase composition and the microstructure of these composites were investigated. The results showed that yittria addition up to 0.5 wt.% has no effect on the properties of these composites. Besides, addition of more than 0.5 wt.% yittria formed solid solution with zirconia grains and led to stabilization of tetragonal zirconia phase and increasing of its amount. Hence, yittria addition increases the hardness and bending strength of composite by stabilizing tetragonal zirconia phase and then, decreasing the micro-crack formation during zirconia phase transformation. As results show, addition of 0.75 wt.% yittria leads to a considerable increase in the bending strength
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Type of Study: Research | Subject: General
Received: 2015/03/4 | Accepted: 2015/03/4 | Published: 2015/03/4

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