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Continuous SiC fibers-ZrB 2 composites

descriptionPublicationkeyboard_double_arrow_right Article 01 Dec 2015 Italy English Publisher:Elsevier BVJournal:Journal of the European Ceramic Society, volume 35, pages 4,371-4,376 (issn: 0955-2219,

Authors: Zoli L; Medri V; Melandri C; Sciti D;

doi: 10.1016/j.jeurceramsoc.2015.08.008

handle: 20.500.14243/313814

Continuous SiC fibers-ZrB 2 composites

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Abstract

ZrB2-continuous SiC fiber composites were prepared by vacuum-bag infiltration and hot pressing, using SiC fabric preforms. Vacuum bag infiltration was effective when unidirectional fiber layers in a 0-90 degrees architecture were infiltrated with an aqueous ZrB2-rich slurry. Sintering was carried out at temperatures between 1450 and 1600 degrees C to study the effect on densification and microstructural features. With a fiber content of around 50 vol%, the composites had a density of 4g/cm(3) and final porosities lower than 10 vol%. Flexural strength was measured at room and high temperature in air. Irrespective of the processing temperature, strength values were 150-170 MPa up to 1200 degrees C and 110 MPa at 1500 degrees C. Short-term oxidation tests were conducted at 1650 degrees C in a bottom-up furnace. (C) 2015 Elsevier Ltd. All rights reserved.

Country

Italy

Related Organizations

National Research Council
Italy
Institute of Science and Technology for Ceramics
Italy

Keywords

Sintering, SiC fibers, UHTC-CMC, Infiltration, UHTCMCs; silicon carbide fibre; impregnation, ZrB2, Ceramic matrix composites

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