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Mechanical and thermal behaviour of cordierite-zirconia composites

CERAMICS INTERNACIONAL

Costa Oliveira, F.A.; Cruz Fernandes, J.2002

Key information

Authors:

Costa Oliveira, F.A.; Cruz Fernandes, J. (José Jorge Lopes da Cruz Fernandes)

Published in

January 5, 2002

Abstract

Cordierite (Mg2Al4Si5O18) ceramics are susceptible of mechanical failure due to their low fracture toughness, which may hinder their application. Dispersion of ZrO2 in cordierite to improve the mechanical properties has been extensively studied. However, little is known about the effect of such additions on both the sinterability and the mechanical properties of cordierite bodies fabricated from talc, kaolin and alumina mixes with additions of monoclinic ZrO2, as most studies are concerned with additions of tetragonal ZrO2 to cordierite powders. The present paper describes the in situ fabrication, the thermal and mechanical properties of sintered cordierite-based ceramic matrix composites containing dispersed particles of ZrO2 obtained by mixing claytalcalumina mixtures with additions of monoclinic ZrO2 up to 40 wt.%. The results obtained clearly demonstrate that the thermal expansion coefficient (CTE), elastic moduli (E) and flexural strength (r) were critically dependent on the mixing/milling conditions, the ZrO2 content and the retained porosity.

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Publication version

AO - Author's Original

Title of the publication container

CERAMICS INTERNACIONAL

First page or article number

79

Last page

91

Volume

28

Issue

1

Fields of Science and Technology (FOS)

materials-engineering - Materials engineering

Publication language (ISO code)

eng - English

Alternative identifier (URI)

http://www.scopus.com/inward/record.url?eid=2-s2.0-0036134405&partnerID=MN8TOARS

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