Processing of dense bioinspired ceramics with deliberate microstructure

Ferrand, Hortense Le; Bouville, Florian

doi:10.1111/jace.16656

Cited by 27 publications

(42 citation statements)

References 44 publications

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“…However, this is without considering the decrease in anisotropy likely to occur past a certain concentration as all directions are reinforced. Dense ceramics with deliberate microstructure have been obtained by using a templated grain growth process where microplatelets oriented in space with magnetic fields in suspension of nanoparticles dictate the orientation of the ceramic anisotropic grains after sintering [12,42]. Periodic microstructures were fabricated either by layering slurries of different compositions [10] or by tuning the orientation of the grains using time-dependent magnetic fields [12].…”

Section: Effect Of the Anglesmentioning

confidence: 99%

“…Dense ceramics with deliberate microstructure have been obtained by using a templated grain growth process where microplatelets oriented in space with magnetic fields in suspension of nanoparticles dictate the orientation of the ceramic anisotropic grains after sintering [12,42]. Periodic microstructures were fabricated either by layering slurries of different compositions [10] or by tuning the orientation of the grains using time-dependent magnetic fields [12]. Samples produced using this latter process is a realistic value for templated aluminas with elongated grains obtained using doping ions [43].…”

Section: Effect Of the Anglesmentioning

confidence: 99%

“…First, mechanical data available in the literature [19] are used to investigate the effect of the microstructure, layer thickness, platelet angle variation between layers and density on the frequency bandgaps appearing in the propagation of a normally-incident elastic wave. The findings are then applied theoretically to a fully dense ceramic system that has been experimentally fabricated in another work [12]. The results obtained in the platelet-reinforced composites and in the ceramic systems are then discussed in terms of combined static and dynamic mechanical performance, density and thermal resistance.…”

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confidence: 99%

“…However, the onset of mechanical bandgaps in pure dense ceramics has not yet been explored. Furthermore, new methods have lead to the fabrication of dense multilayered composites and ceramics with high structural control at multiple levels [11,12]. The specimens fabricated consist in multilayered assemblies of predefined pitch and layer thickness, and with a 3-dimensional (3D) control over the orientation of disc-like inclusions within each layer.…”

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confidence: 99%

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Modeling the effect of microstructure on elastic wave propagation in platelet-reinforced composites and ceramics

Ferrand

2019

Composite Structures

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Dense ceramics are irreplaceable in applications requiring high mechanical stiffness, chemical and temperature resistance and low weight. To improve their toughness, ceramics can be reinforced with elongated inclusions. Recent manufacturing strategies have been developed to control the orientations of disc-like microparticles in polymeric and ceramic matrices and to build periodic microstructures. Given the infinite number of possible microstructures available, modeling tools are required to select the potentially best design. Periodic microstructures can be involved in elastic wave scattering to dissipate mechanical energy from vibrations. In this paper, a model is proposed to determine the frequency bandgaps associated to periodic architectures in composites and ceramics and the influence of microstructural parameters are investigated. The results are used to define guidelines for the future fabrication of hard bulk ceramic materials that combine traditional ceramic's properties with high vibration resistance. Ceramics are advantageous in many high technological applications such as turbine blades, pipelines or tiles of spacecrafts thanks to their chemical inertness, stability until high temperature and high strength and hardness. However, non-piezoelectric ceramic do not present the damping capacity that is required to dissipate the energy from high mechanical impacts and vibrations. Instead, microcracking will occur [1]. To prevent failure of structural parts submitted to vibrations and impacts, reinforced composite laminates are replacing fragile ceramics. However, polymer-based composites cannot sustain the temperatures and harsh environments experienced by turbine blades or space shuttles. Ceramic matrix composites (CMC) are ceramics reinforced with inclusions to increase their toughness and strength [2]. However, their vibration resistance should be further improved for long timer performance under high mechanical dynamic solicitations.

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Section: Effect Of the Anglesmentioning

confidence: 99%

Section: Effect Of the Anglesmentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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Modeling the effect of microstructure on elastic wave propagation in platelet-reinforced composites and ceramics

Ferrand

2019

Composite Structures

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“…90 However, reducing the layer thickness and producing larger construct could maintain a homogeneous drying. 127…”

Section: Flexibility Controllability and Scalability Of The Metmentioning

confidence: 99%

External fields for the fabrication of highly mineralized hierarchical architectures

Ferrand

2018

J. Mater. Res.

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Microstructured BN Composites with Internally Designed High Thermal Conductivity Paths for 3D Electronic Packaging

Peng

Liu

et al. 2022

Advanced Materials

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Miniaturized and high‐power‐density 3D electronic devices pose new challenges on thermal management. Indeed, prompt heat dissipation in electrically insulating packaging is currently limited by the thermal conductivity achieved by thermal interface materials (TIMs) and by their capability to direct the heat toward heat sinks. Here, high thermal conductivity boron nitride (BN)‐based composites that are able to conduct heat intentionally toward specific areas by locally orienting magnetically functionalized BN microplatelets are created using magnetically assisted slip casting. The obtained thermal conductivity along the direction of alignment is unusually high, up to 12.1 W m−1 K−1, thanks to the high concentration of 62.6 vol% of BN in the composite, the low concentration in polymeric binder, and the high degree of alignment. The BN composites have a low density of 1.3 g cm−3, a high stiffness of 442.3 MPa, and are electrically insulating. Uniquely, the approach is demonstrated with proof‐of‐concept composites having locally graded orientations of BN microplatelets to direct the heat away from two vertically stacked heat sources. Rationally designing the microstructure of TIMs to direct heat strategically provides a promising solution for efficient thermal management in 3D integrated electronics.

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Processing of dense bioinspired ceramics with deliberate microstructure

Cited by 27 publications

References 44 publications

Modeling the effect of microstructure on elastic wave propagation in platelet-reinforced composites and ceramics

Modeling the effect of microstructure on elastic wave propagation in platelet-reinforced composites and ceramics

External fields for the fabrication of highly mineralized hierarchical architectures

Microstructured BN Composites with Internally Designed High Thermal Conductivity Paths for 3D Electronic Packaging

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