Flash microwave sintering of zirconia by multiple susceptors cascade strategy |
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| Affiliation: | 1. CNRS, LCTS, UMR 5801, F-33600 Pessac, France;2. CEA, DAM, LE RIPAULT, F-37260 Monts, France;3. CNRS, IRCER, UMR 7315, F-87068 Limoges, France;1. Institute of Science and Technology for Ceramics (ISTEC) of the National Research Council (CNR), Via Granarolo 64, I-48018 Faenza, RA, Italy;2. Department of Chemical Sciences, Università degli Studi di Padova, Via Marzolo 1, 35131 Padova, Italy;3. Department of Materials Science and Engineering, Universitat Politècnica de Catalunya, Campus Diagonal Besòs-EEBE, Barcelona 08019, Spain;4. Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya, Campus Diagonal Besòs − EEBE, Barcelona 08019, Spain;1. College of Physics, Sichuan University, Chengdu 610064, China;2. Key Laboratory of Radiation Physics and Technology of Ministry of Education, Sichuan University, Chengdu 610064, China;3. Key Laboratory of High Energy Density Physics of Ministry of Education, Sichuan University, Chengdu 610064, China;1. CRISMAT, Normandie Univ, ENSICAEN, UNICAEN, CNRS, 14000, Caen, France;2. CIRIMAT, Université de Toulouse, CNRS, INPT, UPS, 31062, Toulouse, France;1. University of Trento, Department of Industrial Engineering, Via Sommarive 9, 38123 Trento, TN, Italy;2. University of Padova, Department of Industrial Engineering, Via Marzolo 9, 35131 Padova, PD, Italy |
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| Abstract: | In the field of flash sintering, microwave energy represents an interesting way to densify ceramics complex shapes, thanks to a contactless volumetric heating. Attaining a fast and homogeneous heating is a critical parameter and hybrid heating, using silicon carbide susceptors, is generally used. In this study, an original multiple susceptors cascade strategy is developed, using both SiC and 3D-printed ZrO2 susceptors. This novel configuration follows perfectly the flash heating scheme, even for high heating rates up to 1000 K.min-1 and leads to a high stability of the “flash” hybrid heating. Flash microwave sintering produced dense (97 % relative density) microstructures within 45 s. Based on comprehensive multiphysics simulations of the overall process, in-situ dilatometry measurements, kinetics method analysis and microstructural characterizations, this work highlights the sintering behavior of zirconia and the temperature distribution during flash microwave sintering. |
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| Keywords: | Flash sintering Zirconia Simulation Microwave Sintering Sintering Mechanism |
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