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In situ study on microwave sintering of ZTA ceramic: Effect of ZrO2 content on densification, hardness, and toughness

Abstract : Better understanding of the effect of multimode-microwave sintering of zirconia-toughened alumina (ZTA) was investigated. A comparative dilatometric analysis was conducted between conventional and microwave heating processes, to clarify the influence of zirconia on the densification of ZTA under electromagnetic field. The thermal gradient on sample measurements indicates the change to the microwave volumetric heating is improved by zirconia which adsorbs microwave energy better, thus acting as a susceptor. The most beneficial effect on microstructure, toughness, and hardness were observed at the optimal zirconia content of 10 vol%. The results with both microwave and conventional sintering illustrate the strengthening effect on the composite by zirconia. Of special interest, multimode microwave sintering creates a finer homogeneous microstructure, with resulting hardness and toughening comparable to those obtained for conventional sintering, as well as improved densification, and at lower cost.
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https://hal-emse.ccsd.cnrs.fr/emse-01578603
Contributor : Géraldine Fournier-Moulin <>
Submitted on : Tuesday, August 29, 2017 - 2:41:11 PM
Last modification on : Wednesday, June 24, 2020 - 4:19:11 PM

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Christophe Meunier, Fei Zuo, Nathalie Peillon, Sébastien Saunier, Sylvain Marinel, et al.. In situ study on microwave sintering of ZTA ceramic: Effect of ZrO2 content on densification, hardness, and toughness. Journal of the American Ceramic Society, Wiley, 2017, 100 (Issue : 3), pp.929-936. ⟨10.1111/jace.14658⟩. ⟨emse-01578603⟩

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