Investigations of SiC aggregates oxidation: Influence on SiC castables refractories life time at high temperature

A. Gallet-Doncieux 1 Ouziyine Bahloul 1 Christian Gault 1 Marc Huger 2 Thierry Chotard 2, *
* Auteur correspondant
2 Axe 1 : procédés céramiques
SPCTS - Science des Procédés Céramiques et de Traitements de Surface
Abstract : This paper reports results concerning the oxidation of silicon carbide of pure SiC powder (98% of SiC) and the oxidation of two silicon carbide castables, used in waste-to-energy plants (WTE), and containing 60% and 85% of SiC, respectively. The investigated temperature range (800-1200. °C) corresponds to typical service conditions in WTE. Thanks to thermogravimetric and thermal expansion tests, kinetics of oxidation of the powder of SiC and of the castables has been investigated. According to these tests, several important points have been underlined. Firstly, the oxidation of SiC aggregates has a high influence on the thermal expansion and on the weight gain of SiC castables. Secondly, the grain size distribution of SiC aggregates within castables plays a dominating role (especially enhanced for the fine particles) in castable expansion behaviour induced by oxidation. This is a key point according to the evolution of thermal expansion of such materials.
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https://hal-unilim.archives-ouvertes.fr/hal-01102661
Contributeur : Thierry Chotard <>
Soumis le : mardi 13 janvier 2015 - 12:03:32
Dernière modification le : mercredi 14 février 2018 - 16:02:08

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A. Gallet-Doncieux, Ouziyine Bahloul, Christian Gault, Marc Huger, Thierry Chotard. Investigations of SiC aggregates oxidation: Influence on SiC castables refractories life time at high temperature. Journal of the European Ceramic Society, Elsevier, 2012, 32 (4), pp.737-743. ⟨10.1016/j.jeurceramsoc.2011.10.044⟩. ⟨hal-01102661⟩

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