Nacre-like alumina composites based on heteroaggregation

Muňoz, Mariana; Cerbelaud, Manuella; Videcoq, Arnaud; Saad, Hassan; Boulle, Alexandre; Meille, Sylvain; Deville, Sylvain; Rossignol, Fabrice

doi:10.1016/j.jeurceramsoc.2020.06.049

Cited by 11 publications

(6 citation statements)

References 21 publications

(34 reference statements)

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“…The improvements are due to both residual stresses (due to the mismatch of thermal expansion coefficients) and transformation toughening. Better control of the spatial repartition of the building blocks (alumina nanoparticles and platelets) can be achieved by heteroaggregation . Finally, a key feature of these composites is the interface between the platelets and the mortar.…”

Section: Nacre-like Aluminamentioning

confidence: 99%

Complex Composites Built through Freezing

2022

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Conspectus Using a limited selection of ordinary components and at ambient temperature, nature has managed to produce a wide range of incredibly diverse materials with astonishingly elegant and complex architectures. Probably the most famous example is nacre, or mother-of-pearl, the inner lining of the shells of abalone and certain other mollusks. Nacre is 95% aragonite, a hard but brittle calcium carbonate mineral, that exhibits fracture toughness exceedingly greater than that of pure aragonite, when tested in the direction perpendicular to the platelets. No human-made composite outperforms its constituent materials by such a wide margin. Nature’s unique ability to combine the desirable properties of components into a material that performs significantly better than the sum of its parts has sparked strong interest in bioinspired materials design. Inspired by this complex hierarchical architecture, many processing routes have been proposed to replicate one or several of these features. New processing techniques point to a number of laboratory successes that hold promise in mimicking nacre. We pioneered one of them, ice templating, in 2006. When a suspension of particles is frozen, particles are rejected by the growing ice crystals and concentrate in the space between the crystals. After the ice is freeze-dried, the resulting scaffold is a porous body that can eventually be pressed to increase the density and then be infiltrated with a second phase, providing multilayered, lamellar complex composites with a microstructure reminiscent of nacre. The composites exhibit a marked crack deflection during crack propagation, enhancing the damage resistance of the materials, offering an interesting trade-off of strength and toughness. Freezing as a path to build complex composites has turned out to be a rich line of research and development. Understanding and controlling the freezing routes and associated phenomena has become a multidisciplinary endeavor. A step forward in the complexity was achieved with the use of anisotropic particles. Ice-induced segregation and alignment of platelets can yield dense, inorganic composites (nacre-like alumina) with a complex architecture and microstructure, replicating several of the morphological features of nacre. Now, a different class of complex composites is quickly arising: engineered living materials, developed in the soft matter and biology communities. The material-agnostic nature of the freezing routes, the use of an aqueous system, the absence of organic solvents, and the low temperatures being used are all strong assets for the development of such complex composites. More complex building blocks, such as cells or bacteria, can be frozen. Understanding the fundamental mechanisms controlling the interactions between the ice crystals and the objects as well as the interactions between the soft objects themselves and their fate is essential in this context. In this Account, we highlight our efforts over the past decade to achieve the controlled synthesis of nacre-like composites...

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Section: Nacre-like Aluminamentioning

confidence: 99%

Complex Composites Built through Freezing

2022

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“…5) est obtenue en éliminant l'eau par sublimation (transition directe de la glace en vapeur). On peut aussi remplacer l'eau par une autre substance pour obtenir un matériau composite, résistant aux fissures, beaucoup moins fragile que la céramique traditionnelle (Deville et al, 2006, Muñoz et al, 2020. Les formes et matériaux céramiques inspirés du vivant n'ont pas fini de nous émerveiller.…”

Section: Céramiques Organiquesunclassified

Formes vivantes : du minéral à l’animé, de l’animé au minéral

Lesne¹

2021

ArtSci

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De nombreux scientifiques ont étudié l'apparition des formes vivantes à partir du minéral. Des notions fondamentales ont ainsi émergé, allant de la caractérisation des matériaux du vivant à leur auto-organisation par des processus actifs, consommant de l'énergie pour produire des structures ordonnées. Dans un cheminement inverse, les artistes céramistes ont exploré les différentes façons de reproduire les formes vivantes dans la matière minérale, pour dépasser la dualité entre animé et inanimé, entre vivant et inorganique. De nouveaux points de rencontre entre les formes vivantes et la céramique se situent aujourd'hui dans les matériaux bio-inspirés et les morphogenèses organiques. ABSTRACT. Many scientists have investigated the emergence of living forms from minerals. Fundamental notions arose, from the characterisation of organic materials to their self-organisation through active processes, consuming energy to produce ordered structures. Along the opposite path, ceramicists have explored the different ways to recreate living forms using mineral matter, going beyond the opposition between animated and inanimate entities, between life and inorganic matter. Novel confluences between living forms and ceramics now appear, for instance bioinspired materials and organic morphogenesis. MOTS-CLÉS. auto-organisation, bio-inspiration, céramique, minéral, morphogenèse, organique.

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“…24 The mechanical performance and characteristics of nacre-inspired and textured ceramics have been reported in some studies. [25][26][27][28] During the fabrication process of nacre-like ceramics, it is critical to align templates into tailored orientation in the composite while manufacturing a macroscopic structure. Tape casting is a well-established processing route for preparing textured ceramics, but the method is limited to simple, high-aspect-ratio part geometries.…”

Section: Introductionmentioning

confidence: 99%

Digital light processing‐based additive manufacturing of orientation‐controlled Al₂O₃ ceramics with improved damage tolerance

Wang,

Han,

Zhou

et al. 2024

Int J Applied Ceramic Tech

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Digital light processing (DLP) provides a promising avenue for constructing ceramic parts with high precision and complex shapes, yet the inherent brittleness and strength‐toughness trade‐off hinder their wide applications. Here, according to DLP 3D printing, the textured alumina ceramic components with horizontally aligned textured microstructure were successfully created by adding anisotropically shaped platelets. As a critical process in the preparation of textured ceramics, the alumina platelets were aligned horizontally during printing by using the special shear fields and forming capabilities of DLP technology. The shrinkage, density, microstructure, mechanical performance, and damage‐tolerance behavior of alumina parts with different platelet concentrations were examined, and the toughening mechanisms were investigated. The strength and toughness of ceramics with 5 vol.% platelet addition are increased by 22% and 43%, respectively, as compared with those without platelets. The improved damage tolerance capabilities were primarily ascribed to the collaborative toughening mechanisms stimulated by the platelet addition, including crack branching, crack deflection, uncracked‐ligament bridging, and platelet pull‐out, which increased the crack tortuosity and consumed more fracture energy. The strategy opens up new opportunities to design complex 3D ceramic geometries with bio‐inspired layered or textured architectures, providing optimized damage tolerance.

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Nacre-like alumina composites based on heteroaggregation

Cited by 11 publications

References 21 publications

Complex Composites Built through Freezing

Complex Composites Built through Freezing

Formes vivantes : du minéral à l’animé, de l’animé au minéral

Digital light processing‐based additive manufacturing of orientation‐controlled Al₂O₃ ceramics with improved damage tolerance

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Nacre-like alumina composites based on heteroaggregation

Cited by 11 publications

References 21 publications

Complex Composites Built through Freezing

Complex Composites Built through Freezing

Formes vivantes : du minéral à l’animé, de l’animé au minéral

Digital light processing‐based additive manufacturing of orientation‐controlled Al2O3 ceramics with improved damage tolerance

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Digital light processing‐based additive manufacturing of orientation‐controlled Al₂O₃ ceramics with improved damage tolerance