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

作者：Madi Kamel^*; Gailliegue Sylvain; Boussuge Michel; Forest Samuel; Gaubil Michel; Boller Elodie; Buffiere Jean Yves

来源：Philosophical Magazine, 2013, 93(20): 2701-2728.

DOI：10.1080/14786435.2013.785655

• creep
• zirconia
• glassy phase
• tomography
• dendritic structure
• finite element

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.

• 出版日期2013-7-1