Investigation of the mechanism(s) controlling microwave sintering of alpha-alumina: Influence of the powder parameters on the grain growth, thermodynamics and densification kinetics
In: ISSN: 0955-2219 ; Journal of the European Ceramic Society ; https://hal-emse.ccsd.cnrs.fr/emse-01145446 ; Journal of the European Ceramic Society, Elsevier, 2015, 35 (3), pp.959-970. ⟨10.1016/j.jeurceramsoc.2014.10.025⟩, 2015
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Zugriff:
International audience ; The objective of this investigation is to deepen the understanding of the mechanism(s) involved in densification and grain growth underlying microwave sintering of alpha-alumina. The densification behavior and microstructure evolution of alpha-alumina powders with different MgO doping levels as well as specific surface areas have been systematically and quantitatively studied during conventional and 2.45 GHz microwave multimode sintering. It is shown that the microwave-induced favorable effects on densification could be more important due to the existence of MgO dopant or a decrease of particle size. Combined with the thermodynamics and kinetics considerations, one assumed that grain-boundary diffusion could be significantly enhanced by microwave non-thermal effect. In addition, the grain growth retardation effect has been attributed to the fine porosity retention induced by microwave electromagnetic field, but not to the local over-heating at grain boundaries.
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Investigation of the mechanism(s) controlling microwave sintering of alpha-alumina: Influence of the powder parameters on the grain growth, thermodynamics and densification kinetics
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| Autor/in / Beteiligte Person: | Zuo, Fei ; Saunier, Sébastien ; Marinel, Sylvain ; Chanin-Lambert, Pauline ; Peillon, Nathalie ; Goeuriot, Dominique ; Département Mécanique et Procédés d'Elaboration (MPE-ENSMSE) ; École des Mines de Saint-Étienne (Mines Saint-Étienne MSE) ; Institut Mines-Télécom Paris (IMT)-Institut Mines-Télécom Paris (IMT)-SMS ; Centre Science des Matériaux et des Structures (SMS-ENSMSE) ; Institut Mines-Télécom Paris (IMT)-Institut Mines-Télécom Paris (IMT) ; Laboratoire Georges Friedel (LGF-ENSMSE) ; Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-École des Mines de Saint-Étienne (Mines Saint-Étienne MSE) ; Laboratoire de cristallographie et sciences des matériaux (CRISMAT) ; École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN) ; Normandie Université (NU)-Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Université de Caen Normandie (UNICAEN) ; Normandie Université (NU)-Institut de Chimie du CNRS (INC) ; ANR-11-BS08-0014,FURNACE,Frittage micro-ondes de nano-ceramiques(2011) |
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| Zeitschrift: | ISSN: 0955-2219 ; Journal of the European Ceramic Society ; https://hal-emse.ccsd.cnrs.fr/emse-01145446 ; Journal of the European Ceramic Society, Elsevier, 2015, 35 (3), pp.959-970. ⟨10.1016/j.jeurceramsoc.2014.10.025⟩, 2015 |
| Veröffentlichung: | HAL CCSD ; Elsevier, 2015 |
| Medientyp: | academicJournal |
| DOI: | 10.1016/j.jeurceramsoc.2014.10.025 |
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