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Experimental Characterization and Thermomechanical Modelling of Microstructure Interactions in Cellular Carbon Magnesia Refractories

G. Falk, A. Jung, W. da Silveira, S. Diebels

Journal of Ceramic Science and Technology, Vol. 5, No. 2 (2014), pp. 101-114

DOI: 10.4416/JCST2013-00029

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Abstract

Experimental results and computational solutions regarding microstructural interactions and their influence on the thermomechanical strength of cellular carbon foams reinforced with yttria-stabilized zirconia (YSZ) and silicon carbide (SiC) coatings are presented. The computational approach is related to the quantification of failure stresses as a function of the microstructural size under thermal shock loading and under hot bending with microstructural-based finite element analysis. The numerical results of this simplified computational approach are correlated to the experimentally motivated Hasselman's equations. Correlated to the computational results, these experimental result parameters for final crack length and final crack density allow conclusions to be drawn about the most suitable microstructural foam parameters in order to achieve advanced thermal shock characteristics for next-generation hybrid carbon foam refractories.

Keywords

Porous carbon, thermal shock, FEM modelling

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