Investigation by neutron diffraction of texture induced by the cooling process of zirconia refractories |
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| Affiliation: | 1. LMDC-UPS-INSA Toulouse, EA 3027, 135 avenue de Rangueil, 31077 Toulouse, France;2. SPCTS, UMR CNRS 7315, Centre Européen de la Céramique, 12 rue Atlantis, 87068 Limoges, France;3. Institut Laue-Langevin, BP156, 6 rue Jules Horowitz, 38042 Grenoble, France;4. CRISMAT-ENSICAEN, UMR 6508, 6 boulevard du Maréchal Juin, 14050 Caen, France;1. Central Glass and Ceramic Research Institute, CSIR, Kolkata 700032, West Bengal, India;2. North East Institute of Science and Technology, CSIR, Jorhat 785006, Assam, India;1. University of Stellenbosch, Department of Process Engineering, Private Bag X1, Matieland 7602, South Africa;2. Aalto University, School of Chemical Technology, Metallurgical Thermodynamics and Modelling Research Group, Espoo, Finland;1. CEA–CNRS–ENSICAEN–Université de Caen Basse Normandie, CIMAP, UMR 6252, BP 5133, 14070 Caen, France;2. Université d''Orléans, ISTO, UMR 7327, 45071 Orléans, France;3. CNRS/INSU, ISTO, UMR 7327, 45071 Orléans, France;4. BRGM, ISTO, UMR 7327, BP 36009, 45060 Orléans, France;5. Université de Bretagne Occidentale–CNRS, IUEM, UMR 6538, 29280 Plouzané, France |
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| Abstract: | New fused cast refractories with a high content of zirconia have been developed to face corrosion in glass furnaces. The controlled cooling process is responsible for thermal gradients. So, thermal mismatches appear between core and edge zones of blocks. Besides, the multiphasic nature of ZrO2 based refractories is associated to thermal mismatches during cooling. Finally, the expansive transformation of ZrO2 can lead to stress generation.This paper is an application of neutron diffraction to study texture generated during the cooling process of zirconia based materials. In fact, it is shown that ZrO2 crystallographic variants have particular crystallographic texture regarding the main direction of the thermal gradient in the block. It was hypothesized that a selection of crystallographic variants could be done depending on the field stress. Tensile-compressive tests at high temperature have been done, to reproduce stress environment during the transformation of zirconia. |
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| Keywords: | Refractories Texture Variants Cooling process Neutron diffraction |
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