Archimedean lattices emerge in template-directed eutectic solidification

Ashish A. Kulkarni, Erik Hanson, Runyu Zhang, Katsuyo Thornton, Paul V. Braun

Research output: Contribution to journalArticle

Abstract

Template-directed assembly has been shown to yield a broad diversity of highly ordered mesostructures 1,2, which in a few cases exhibit symmetries not present in the native material 3–5. However, this technique has not yet been applied to eutectic materials, which underpin many modern technologies ranging from high-performance turbine blades to solder alloys. Here we use directional solidification of a simple AgCl-KCl lamellar eutectic material within a pillar template to show that interactions of the material with the template lead to the emergence of a set of microstructures that are distinct from the eutectic’s native lamellar structure and the template’s hexagonal lattice structure. By modifying the solidification rate of this material–template system, trefoil, quatrefoil, cinquefoil and hexafoil mesostructures with submicrometre-size features are realized. Phase-field simulations suggest that these mesostructures appear owing to constraints imposed on diffusion by the hexagonally arrayed pillar template. We note that the trefoil and hexafoil patterns resemble Archimedean honeycomb and square–hexagonal–dodecagonal lattices 6, respectively. We also find that by using monolayer colloidal crystals as templates, a variety of eutectic mesostructures including trefoil and hexafoil are observed, the former resembling the Archimedean kagome lattice. Potential emerging applications for the structures provided by templated eutectics include non-reciprocal metasurfaces 7, magnetic spin-ice systems 8,9, and micro- and nano-lattices with enhanced mechanical properties 10,11.

Original languageEnglish (US)
Pages (from-to)355-358
Number of pages4
JournalNature
Volume577
Issue number7790
DOIs
StatePublished - Jan 16 2020

Fingerprint

eutectics
solidification
templates
turbine blades
solders
emerging
ice
assembly
mechanical properties
microstructure
symmetry
crystals
simulation
interactions

ASJC Scopus subject areas

  • General

Cite this

Archimedean lattices emerge in template-directed eutectic solidification. / Kulkarni, Ashish A.; Hanson, Erik; Zhang, Runyu; Thornton, Katsuyo; Braun, Paul V.

In: Nature, Vol. 577, No. 7790, 16.01.2020, p. 355-358.

Research output: Contribution to journalArticle

Kulkarni, AA, Hanson, E, Zhang, R, Thornton, K & Braun, PV 2020, 'Archimedean lattices emerge in template-directed eutectic solidification', Nature, vol. 577, no. 7790, pp. 355-358. https://doi.org/10.1038/s41586-019-1893-9
Kulkarni, Ashish A. ; Hanson, Erik ; Zhang, Runyu ; Thornton, Katsuyo ; Braun, Paul V. / Archimedean lattices emerge in template-directed eutectic solidification. In: Nature. 2020 ; Vol. 577, No. 7790. pp. 355-358.
@article{c152859587f04734ad5968b914070007,
title = "Archimedean lattices emerge in template-directed eutectic solidification",
abstract = "Template-directed assembly has been shown to yield a broad diversity of highly ordered mesostructures 1,2, which in a few cases exhibit symmetries not present in the native material 3–5. However, this technique has not yet been applied to eutectic materials, which underpin many modern technologies ranging from high-performance turbine blades to solder alloys. Here we use directional solidification of a simple AgCl-KCl lamellar eutectic material within a pillar template to show that interactions of the material with the template lead to the emergence of a set of microstructures that are distinct from the eutectic’s native lamellar structure and the template’s hexagonal lattice structure. By modifying the solidification rate of this material–template system, trefoil, quatrefoil, cinquefoil and hexafoil mesostructures with submicrometre-size features are realized. Phase-field simulations suggest that these mesostructures appear owing to constraints imposed on diffusion by the hexagonally arrayed pillar template. We note that the trefoil and hexafoil patterns resemble Archimedean honeycomb and square–hexagonal–dodecagonal lattices 6, respectively. We also find that by using monolayer colloidal crystals as templates, a variety of eutectic mesostructures including trefoil and hexafoil are observed, the former resembling the Archimedean kagome lattice. Potential emerging applications for the structures provided by templated eutectics include non-reciprocal metasurfaces 7, magnetic spin-ice systems 8,9, and micro- and nano-lattices with enhanced mechanical properties 10,11.",
author = "Kulkarni, {Ashish A.} and Erik Hanson and Runyu Zhang and Katsuyo Thornton and Braun, {Paul V.}",
year = "2020",
month = "1",
day = "16",
doi = "10.1038/s41586-019-1893-9",
language = "English (US)",
volume = "577",
pages = "355--358",
journal = "Nature",
issn = "0028-0836",
publisher = "Nature Publishing Group",
number = "7790",

}

TY - JOUR

T1 - Archimedean lattices emerge in template-directed eutectic solidification

AU - Kulkarni, Ashish A.

AU - Hanson, Erik

AU - Zhang, Runyu

AU - Thornton, Katsuyo

AU - Braun, Paul V.

PY - 2020/1/16

Y1 - 2020/1/16

N2 - Template-directed assembly has been shown to yield a broad diversity of highly ordered mesostructures 1,2, which in a few cases exhibit symmetries not present in the native material 3–5. However, this technique has not yet been applied to eutectic materials, which underpin many modern technologies ranging from high-performance turbine blades to solder alloys. Here we use directional solidification of a simple AgCl-KCl lamellar eutectic material within a pillar template to show that interactions of the material with the template lead to the emergence of a set of microstructures that are distinct from the eutectic’s native lamellar structure and the template’s hexagonal lattice structure. By modifying the solidification rate of this material–template system, trefoil, quatrefoil, cinquefoil and hexafoil mesostructures with submicrometre-size features are realized. Phase-field simulations suggest that these mesostructures appear owing to constraints imposed on diffusion by the hexagonally arrayed pillar template. We note that the trefoil and hexafoil patterns resemble Archimedean honeycomb and square–hexagonal–dodecagonal lattices 6, respectively. We also find that by using monolayer colloidal crystals as templates, a variety of eutectic mesostructures including trefoil and hexafoil are observed, the former resembling the Archimedean kagome lattice. Potential emerging applications for the structures provided by templated eutectics include non-reciprocal metasurfaces 7, magnetic spin-ice systems 8,9, and micro- and nano-lattices with enhanced mechanical properties 10,11.

AB - Template-directed assembly has been shown to yield a broad diversity of highly ordered mesostructures 1,2, which in a few cases exhibit symmetries not present in the native material 3–5. However, this technique has not yet been applied to eutectic materials, which underpin many modern technologies ranging from high-performance turbine blades to solder alloys. Here we use directional solidification of a simple AgCl-KCl lamellar eutectic material within a pillar template to show that interactions of the material with the template lead to the emergence of a set of microstructures that are distinct from the eutectic’s native lamellar structure and the template’s hexagonal lattice structure. By modifying the solidification rate of this material–template system, trefoil, quatrefoil, cinquefoil and hexafoil mesostructures with submicrometre-size features are realized. Phase-field simulations suggest that these mesostructures appear owing to constraints imposed on diffusion by the hexagonally arrayed pillar template. We note that the trefoil and hexafoil patterns resemble Archimedean honeycomb and square–hexagonal–dodecagonal lattices 6, respectively. We also find that by using monolayer colloidal crystals as templates, a variety of eutectic mesostructures including trefoil and hexafoil are observed, the former resembling the Archimedean kagome lattice. Potential emerging applications for the structures provided by templated eutectics include non-reciprocal metasurfaces 7, magnetic spin-ice systems 8,9, and micro- and nano-lattices with enhanced mechanical properties 10,11.

UR - http://www.scopus.com/inward/record.url?scp=85077940929&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85077940929&partnerID=8YFLogxK

U2 - 10.1038/s41586-019-1893-9

DO - 10.1038/s41586-019-1893-9

M3 - Article

VL - 577

SP - 355

EP - 358

JO - Nature

JF - Nature

SN - 0028-0836

IS - 7790

ER -