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Multiscale creep characterization and modeling of a zirconia-rich fused-cast refractory

Abstract : This work aims at investigating the mechanical behaviour of a zirconia-rich fused-cast refractory at high temperature ( C). The geometry of the zirconia phase was analysed on samples having contents of amorphous phase ranging from 12 to 24% in volume, from 3D images obtained using the X-ray computed micro-tomography technique. The sharp intrication of the dendrites creates a continous zirconia skeleton which was characterized experimentally. Results at high temperature show that deformation is controlled by zirconia, whereas the amorphous phase does not play any structural role. Finite-element simulations have been carried out to predict the creep behaviour of the aggregate. The creep law of the zirconia skeleton was identified by an inverse method from a creep test at C and from the 3D real morphology of the dendritic zirconia structure. Simulation results confirm that the rheology of the aggregate is controlled by the zirconia skeleton and a good agreement was observed between numerical creep tests and experiments.
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Submitted on : Wednesday, October 2, 2013 - 11:46:41 AM
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Kamel Madi, Sylvain Gailliègue, Michel Boussuge, Samuel Forest, Michel Gaubil, et al.. Multiscale creep characterization and modeling of a zirconia-rich fused-cast refractory. Philosophical Magazine, Taylor & Francis, 2013, 93, pp.2701-2728. ⟨10.1080/14786435.2013.785655⟩. ⟨hal-00868969⟩



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