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HomeAdvances in Science and TechnologyAdvances in Science and Technology Vol. 62Improving the Porosity Features Control of Ceramic...

Improving the Porosity Features Control of Ceramic Cellular Components through a Modified Gelcasting Process

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Abstract:

An innovative gelcasting procedure was successfully developed to produce cellular ceramic materials, having controlled porosity features, tailored for a specific application. This process combines a conventional gelcasting based on in situ polymerization of a natural gelling agent to a sacrificial template method, in which polyethylene (PE) spheres having a controlled size distribution are used as pore former. By a suitable selection of the PE spheres fraction and volume percentage, it is possible to modify some important porosity characteristics of the final component, such as the mean pore size, the total pore volume, the pore geometry as well as the pore interconnection number and size. The effectiveness and versatility of this procedure was demonstrated by exploiting it in the preparation of porous components made of several ceramic powders (alumina, zirconia, hydroxyapatite) different in terms of composition and size.

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12th INTERNATIONAL CERAMICS CONGRESS PART A

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Periodical:

Advances in Science and Technology (Volume 62)

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147-156

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https://doi.org/10.4028/www.scientific.net/AST.62.147

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Online since:

October 2010

Authors:

Mariangela Lombardi, Sylvain Meille, Jérôme Chevalier, Laura Montanaro

Keywords:

Gelcasting, Gelcasting of Foams, Porosity, Porous Ceramics, Sacrificial Template

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© 2010 Trans Tech Publications Ltd. All Rights Reserved

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