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Influence of Glass Phase on Al2O3 Fiber-reinforced Al2O3 Composites Processed by slip Casting

Publication Type : Journal Article

Thematic Areas : Nanosciences and Molecular Medicine

Publisher : Journal of the European Ceramic Society

Source : Journal of the European Ceramic Society, Volume 31, Number 3, p.385-389 (2011)

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Keywords : Alumina ceramic, Alumina fiber, Alumina preforms, Aluminum, Before and after, Ceramic materials, Energy dispersive x-ray, Fiber-reinforced ceramics, Fibers, Fine powders, Flexural strength, Glass, Glass infiltration, Glass phase, Infiltration process, Linear shrinkage, matrix, Narrow pores, Pore size, Porosimetry, Preforming, scanning electron microscopy, Seepage, Shrinkage, Sintering, Slip casting, Soil mechanics, strength, X ray diffraction

Campus : Kochi

School : Center for Nanosciences

Center : Nanosciences

Department : Nanosciences and Molecular Medicine

Year : 2011

Abstract : pThe present work describes the processing of alumina fiber reinforced alumina ceramic preforms consisting of chopped Al2O3 fibers (33wt%) and Al2O3 (67wt%) fine powders by slip casting. The preforms were pre-sintered in air at 1100°C for 1h. A lanthanum based glass was infiltrated into these preforms at 1250°C for 90min. Linear shrinkage (%) was studied before and after glass infiltration. Pre-sintered and infiltrated specimens were characterized by scanning electron microscopy, energy dispersive X-ray, X-ray diffraction, porosimetry and flexural strength. The alumina preforms showed a narrow pore size distribution with an average pore size of ∼50nm. It was observed that introducing Al2O3 fibers into Al2O3 particulate matrix produced warp free preforms with minor shrinkage during pre-sintering and glass infiltration. It was observed that the infiltration process fills up the pores and considerably improves the strength and reliability of alumina preform. © 2010 Elsevier Ltd./p

Cite this Research Publication : A. Licciulli, Contaldi, V., Padmanabhan, S. K., Balakrishnan, A., Siligardi, C., and Diso, D., “Influence of Glass Phase on Al2O3 Fiber-reinforced Al2O3 Composites Processed by slip Casting”, Journal of the European Ceramic Society, vol. 31, pp. 385-389, 2011.

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