High-throughput microstructure and composition characterisation of microplatelet reinforced composites using directional reflectance microscopy

Chou, Vanessa Hui Yin; Liu, Wing Chung; Wittwer, Mallory; Ferrand, Hortense Le; Seita, Matteo

doi:10.1016/j.actamat.2022.117798

Cited by 8 publications

(3 citation statements)

References 37 publications

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“…The successful microplatelet orientation in the alumina-IPN composite could be visualized optically (figure 4). Indeed, the m-Al 2 O 3 platelets act as little mirrors and reflect light differently when in horizontal and vertical position [35]. Layers containing vertically orientated microplatelets appear with a lighter colour than layers with horizontally aligned microplatelets.…”

Section: Microstructured Bioinspired Compositesmentioning

confidence: 99%

Fabrication and testing of bioinspired microstructured alumina composites with sacrificial interpenetrating polymer bonds

2023

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Bioinspired composites exhibit well-defined microstructures, where anisotropic ceramic particles are assembled and bound by an organic matrix. However, it is difficult to fabricate these composites where both the ceramic particles and organic matrix work together to unlock toughening mechanisms, such as shear dissipation, particle rotation and interlocking, etc., that lead to stiff, strong, and tough composites. Here, we produce composites inspired by seashells, made of alumina microplatelets assembled in complex microstructures and that are physically bonded by a small amount of interpenetrated polymer network (IPN) made of polyacrylamide (PAM) and polyN-isopropylacrylamide (PNIPAM). The fabrication employs magnetically assisted slip casting (MASC) to orient the microplatelets as desired, and in situ gelation of the IPN, followed by drying. The process was successful after carefully tuning the slip casting and gelation kinetics. Samples with horizontal, vertical, and alternating vertical and horizontal microplatelets orientations were then tested under compression. It was found that the IPN threads bonding the microplatelets acted as sacrificial bonds dissipating energy during the compression. Paired with the alternating microstructure, the IPN significantly enhanced the compressive toughness of the composites by 205% as compared to the composites with horizontal or vertical orientation only, with less than 35% reduction on the stiffness. This study demonstrates that microstructure control and design combined with a flexible and tough matrix can effectively enhance the properties of bioinspired ceramic polymer composites.

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Section: Microstructured Bioinspired Compositesmentioning

confidence: 99%

Fabrication and testing of bioinspired microstructured alumina composites with sacrificial interpenetrating polymer bonds

2023

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“…The success of the method depended on the concentration of particles in the ink deposited. 275 Moreover, SLA has also been used with 2D nanomaterials. 276,277 In SLA, a liquid suspension containing 2D nanosheets and a UV-curable liquid is locally cured using UV light.…”

Section: D Printing Combined With Alignmentmentioning

confidence: 99%

Controlled local orientation of 2D nanomaterials in 3D devices: methods and prospects for multifunctional designs and enhanced performance

Guan

Ferrand

2022

J. Mater. Chem. A

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“…DRM has been demonstrated on pure metals, [ 20 , 24 ] semiconductors, [ 19 ] metal alloys, [ 21 ] and ceramic reinforced polymer composites. [ 25 ] However, it holds greatest promise wherever conventional characterization techniques, such as EBSD, struggle to assess large-scale microstructure variability, e.g., in additively manufactured materials. [ 26 , 27 ] Other techniques that integrate multiple images to expand the microstructure information obtainable through optical microscopy include ones that vary light polarization to infer crystallographic textures [ 28 – 30 ] or, in some cases, full crystal orientations.…”

Section: Multi-image Characterization Of a Single Sample Locationmentioning

confidence: 99%

Quantitative multi-image analysis in metals research

et al. 2022

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Quantitative multi-image analysis (QMA) is the systematic extraction of new information and insight through the simultaneous analysis of multiple, related images. We present examples illustrating the potential for QMA to advance materials research in multi-image characterization, automatic feature identification, and discovery of novel processing-structure–property relationships. We conclude by discussing opportunities and challenges for continued advancement of QMA, including instrumentation development, uncertainty quantification, and automatic parsing of literature data. Graphical abstract

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High-throughput microstructure and composition characterisation of microplatelet reinforced composites using directional reflectance microscopy

Cited by 8 publications

References 37 publications

Fabrication and testing of bioinspired microstructured alumina composites with sacrificial interpenetrating polymer bonds

Fabrication and testing of bioinspired microstructured alumina composites with sacrificial interpenetrating polymer bonds

Controlled local orientation of 2D nanomaterials in 3D devices: methods and prospects for multifunctional designs and enhanced performance

Quantitative multi-image analysis in metals research

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