Modeling of the thermo-chemo-mechanical behavior of SiC-based refractory used in waste-to-energy plants

Tarek Merzouki (1) , Eric Blond (2) , Alain Gasser (2) , N. Schmitt (3, 4) , Pascal Prigent (5)

1 PRISME - Laboratoire Pluridisciplinaire de Recherche en Ingénierie des Systèmes, Mécanique et Energétique
2 F2ME
3 LMT - Laboratoire de Mécanique et Technologie
4 UPEC UP12 - Université Paris-Est Créteil Val-de-Marne - Paris 12
5 CEMHTI - Conditions Extrêmes et Matériaux : Haute Température et Irradiation

This work provides a computational model that will help to predict the life-span of SiC based refractories used in waste to energy plant (WTE) linings. For this particular application, gas present in the atmosphere diffuse through the porosity and react with the refractory producing SiO2 and CaSiO3 solids. These new phases clog gradually the pores and cause swelling of the material and as a result irreversible deformation of the lining. The proposed thermo-chemo-mechanical model that simulates these phenomena is briefly summarized and some of the parameters are identified. Then, first results obtained with the model implemented in a F.E.M code are shown. They prove the ability of the model to reproduce qualitatively the swelling of post-mortem bricks taken from WTE linings.

Mots clés: SiC based refractories; Coupling; Thermo-chemo-mechanics

Domaines: Mécanique des matériaux [physics.class-ph]; Mécanique des matériaux [physics.class-ph]

Tarek Merzouki, Eric Blond, Alain Gasser, N. Schmitt, Pascal Prigent. Modeling of the thermo-chemo-mechanical behavior of SiC-based refractory used in waste-to-energy plants. 12th Conference of the European Ceramic Society, Jun 2011, Stockholm, Sweden. pp.oral 113. ⟨hal-00611406⟩