# Nacre-like alumina: past, present, and future (Keynote)

Sylvain Deville, Sylvain Meille, Hassan Saad, Christophe L. Martin, David Jauffrès, Bruno Reynard, Ronan Henry, Thierry Douillard, Aurélien Doitrand, Kaoutar Radi

## ► To cite this version:

Sylvain Deville, Sylvain Meille, Hassan Saad, Christophe L. Martin, David Jauffrès, et al., Nacre-like alumina: past, present, and future (Keynote). European Congress and exhibition on Advanced Materials and Processes (EUROMAT 2021), Sep 2021, Graz, Austria. hal-03485180

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https://hal.science/hal-03485180v1

Submitted on 9 Dec 2024

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Nacre-like alumina: past, present, and future

Sylvain Deville (1) , Sylvain Meille (2) , Hassan Saad (3) , Christophe L. Martin (4) , David
Jauffrès (4) , Bruno Reynard (5) , Ronan Henry (2) , Thierry Douillard (2) , Aurélien
Doitrand (2) , Kaoutar Radi (4)

1 iLM - L&I - iLM - Liquides et interfaces

2 MATEIS - Matériaux, ingénierie et science

3 LSFC - Laboratoire de Synthèse et Fonctionnalisation des Céramiques

4 SIMaP - Science et Ingénierie des Matériaux et Procédés

5 LGL-TPE - Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement

Nacre-like aluminas are a new class of bioinspired ceramic composites developed over the last few years. These brick-and-mortar composites are obtained by aligning and concentrating alumina platelets and distributing a secondary phase (polymer, ceramic, glass, metal) at the platelets interfaces. The main interest so far of these materials is their damage resistance, resulting mostly from the crack deflection at the platelet/mortar interface. I will discuss the latest processing route developments and our current understanding of the micro- and macro-mechanical properties of these materials, as well as the current challenges and possible applications of these materials.

References:

- A simple approach to bulk bioinspired tough ceramics, H Saad, K Radi, T Douillard, D Jauffres, CL Martin, S Meille, S Deville, Materialia 12, 100807

- Strength and toughness trade-off optimization of nacre-like ceramic composites, K Radi, D Jauffres, S Deville, CL Martin, Composites Part B: Engineering 183, 107699

- Interface failure in nacre-like alumina, R Henry, H Saad, A Doitrand, S Deville, S Meille, Journal of the European Ceramic Society 40 (13), 4694-4699

- Effect of microstructure heterogeneity on the damage resistance of nacre-like alumina: insights from image-based discrete simulations, K Radi, H Saad, D Jauffres, S Meille, T Douillard, S Deville, CL Martin, Scripta Materialia 191, 210-214

- Determination of interface fracture properties by micro-and macro-scale experiments in nacre-like alumina, A Doitrand, R Henry, H Saad, S Deville, S Meille, Journal of the Mechanics and Physics of Solids 145, 104143