Archimedean lattices emerge in template-directed eutectic solidification

Kulkarni, Ashish A.; Hanson, Erik; Zhang, Runyu; Thornton, Katsuyo

doi:10.1038/s41586-019-1893-9

Cited by 25 publications

(17 citation statements)

References 40 publications

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“…metallic foams [389,390]). The PF method also provides an outstanding tool to predict and control the development of micro-/nanopatterned materials, such as nano-templated eutectics [391] or ice-templated structures [392] for instance used in biomedical applications [393] or manufacturing of magnetic composites [394]. Furthermore, phase-field simulations can help understanding the formation of complex hierarchical biomaterials with outstanding properties [395] (e.g.…”

Section: Perspectives and Novel Applicationsmentioning

confidence: 99%

Phase-field modeling of microstructure evolution: Recent applications, perspectives and challenges

Tourret¹,

Liu²,

Llorca³

2021

Preprint

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We briefly review the state-of-the-art in phase-field modeling of microstructure evolution. The focus is placed on recent applications of phase-field simulations of solid-state microstructure evolution and solidification that have been compared and/or validated with experiments. They show the potential of phase-field modeling to make quantitative predictions of the link between processing and microstructure. Finally, some current challenges in extending the application of phase-field models within the context of integrated computational materials engineering are mentioned.

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Section: Perspectives and Novel Applicationsmentioning

confidence: 99%

Phase-field modeling of microstructure evolution: Recent applications, perspectives and challenges

Tourret¹,

Liu²,

Llorca³

2021

Preprint

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“…Recently, directional solidification of eutectics was utilized for energy materials such as solid-oxide fuel cells [11,12] and electrodes for hydrogen generation [13,14], and optical materials such as photonic crystals [15,16]; THz polaritonic materials [17,18]; metamaterials [19][20][21][22][23] and nanoplasmonic materials [24][25][26]. It has been also shown that eutectic composites could exhibit unusual geometries when properly engineered [27][28][29], in addition to being grown as bulk materials [30] even on the industrial scale and also printed [31].…”

Section: Introductionmentioning

confidence: 99%

Bulk nanocomposite made of ZnO lamellae embedded in the ZnWO4 matrix: growth from the melt

et al. 2021

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Zinc oxide (ZnO) nanostructures exhibiting high exciton binding energy and efficient radiative recombination, even at the room temperature, are of increasing interest due to their prospective exploitation in optoelectronic and laser applications. However, attempts to synthesize well-ordered structures through simple and fast process have faced many difficulties. Here, we demonstrate a novel manufacturing method of ZnO lamellae embedded in a crystalline wide band gap dielectric matrix of the zinc tungstate, ZnWO4. The manufacturing method is based on a directional solidification of a eutectic composite, directly from the melt, resulting in a nanostructured bulk material. Electron microscopy studies revealed clear phase separation between the ZnO and ZnWO4 phases, and cathodoluminescence confirmed exciton emission at room temperature and thus high quality and crystallinity of the ZnO lamellae, without defect emission. Hence, utilization of directional solidification of eutectics may enable cost-efficient manufacturing of bulk nanostructured ZnO composites and their use in optical devices. Graphical abstract

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“…Eutectics are a common feature in many phase diagrams and are utilized for various applications. ,,− During the solidification of eutectic systems, , multiple phases self-organize into characteristic spacings based on the solidification velocity and growth along the imposed temperature gradient. Such alignment of the eutectic phases can exhibit anisotropy of the microstructure and hence the directional dependence of the properties, including thermoelectric transport properties.…”

Section: Introductionmentioning

confidence: 99%

Anisotropy of Microstructure and Its Influence on Thermoelectricity: The Case of Cu₂Te–Sb₂Te₃ Eutectic

Mukherjee

Aramanda

Legese,

et al. 2021

ACS Appl. Energy Mater.

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Using a set of controlled in situ grown lamellar composites of (Cu2Te)62.02–(Sb2Te3)37.98, we report a remarkable variation of transport properties of thermoelectricity not only as a function of microstructural length scale but also as a function of direction-dependent arrangement of the phases and hence their interfaces. A quantitative evaluation of the microstructure along the transverse and the longitudinal directions of growth, imposed by the temperature gradient and growth rate in a unidirectional solidification setup, has been carried out. The microstructure is quantified through image analysis using fast Fourier transforms as well as a cluster base connectivity model and is further correlated with the thermoelectric transport properties. A marked anisotropy of properties as a function of measurement direction in the microstructural landscape could be observed. A maximum power factor of ∼1.4 mW m–1 K–2 and a figure of merit of 0.29 could be obtained at 580 K along the transverse direction for the sample with the characteristic microstructural length scale of 2.41 μm. This has an implication in engineering a thermoelectric device in terms of engineering power factor and output power density. For a ΔT of 250 K, we report a difference of 0.4 W cm–2 in output power density between the transverse and the longitudinal directions that have an identical microstructural length scale of 2.41 μm.

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Archimedean lattices emerge in template-directed eutectic solidification

Cited by 25 publications

References 40 publications

Phase-field modeling of microstructure evolution: Recent applications, perspectives and challenges

Phase-field modeling of microstructure evolution: Recent applications, perspectives and challenges

Bulk nanocomposite made of ZnO lamellae embedded in the ZnWO4 matrix: growth from the melt

Anisotropy of Microstructure and Its Influence on Thermoelectricity: The Case of Cu₂Te–Sb₂Te₃ Eutectic

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Archimedean lattices emerge in template-directed eutectic solidification

Cited by 25 publications

References 40 publications

Phase-field modeling of microstructure evolution: Recent applications, perspectives and challenges

Phase-field modeling of microstructure evolution: Recent applications, perspectives and challenges

Bulk nanocomposite made of ZnO lamellae embedded in the ZnWO4 matrix: growth from the melt

Anisotropy of Microstructure and Its Influence on Thermoelectricity: The Case of Cu2Te–Sb2Te3 Eutectic

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Anisotropy of Microstructure and Its Influence on Thermoelectricity: The Case of Cu₂Te–Sb₂Te₃ Eutectic