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Single-step sintering of zirconia ceramics using hydroxide precursors and spark plasma sintering below 400°C

Elissalde, Catherine and Chung, U-Chan and Josse, Michaël and Goglio, Graziella and Suchomel, Matthew R. and Majimel, Jérôme and Weibel, Alicia and Soubie, F. and Flaureau, Andréas and Fregeac, Arnaud and Estournès, Claude Single-step sintering of zirconia ceramics using hydroxide precursors and spark plasma sintering below 400°C. (2019) Scripta Materialia, 168. 134-138. ISSN 1359-6462

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Official URL: https://doi.org/10.1016/j.scriptamat.2019.04.037

Abstract

The densification of zirconia at very lowtemperatures (b400 °C) requires enhanced synergy between thermodynamics and kinetics. This work demonstrates an efficient single step approach combining amorphous hydrated zirconia and Spark Plasma Sintering at 350 °C and 600 MPa. The resulting zirconia ceramics exhibit a cohesive nanostructure with small average grain sizes (20 nm) and a predominantly monoclinic structural polymorph confirmed by both X-ray scattering analyses and High Resolution Transmission Electronic Microscopy. Remarkable Vickers hardness of 3.8 GPa for high level of porosity (30%) is explained by the density and homogeneous distribution of grains boundaries and meso/microporosities.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > Institut Polytechnique de Bordeaux - IPB (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Université de Bordeaux (FRANCE)
Laboratory name:
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Deposited By: cirimat webmestre
Deposited On:29 May 2019 14:02

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