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Quasicrystal nucleation and Z module twin growth in an intermetallic glass-forming system

Hornfeck, W. and Kobold, Raphael and Kolbe, Matthias and Conrad, Matthias and Herlach, Dieter (2018) Quasicrystal nucleation and Z module twin growth in an intermetallic glass-forming system. Nature Communications. Nature Publishing Group. doi: 10.1038/s41467-018-06597-0. ISSN 2041-1723.

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Official URL: https://www.nature.com/articles/s41467-018-06597-0


While quasicrystals possess long-range orientational order they lack translation periodicity. Considerable advancements in the elucidation of their structures and formative principles contrast with comparatively uncharted interrelations, as studies bridging the spatial scales from atoms to the macroscale are scarce. Here, we report on the homogeneous nucleation of a single quasicrystalline seed from the undercooled melt of glass-forming NiZr and its continuous growth into a tenfold twinned dendritic microstructure. Observing a series of crystallization events on electrostatically levitated NiZr confirms homogeneous nucleation. Mapping the microstructure with electron backscatter diffraction suggests a unique, distortion-free structure merging a common structure type of binary alloys with a spiral growth mechanism resembling phyllotaxis. A general geometric description, relating all atomic loci, observed by atomic resolution electron microscopy, to a pentagonal Z module, explains how the seed's decagonal long-range orientational order is conserved throughout the symmetry breaking steps of twinning and dendritic growth.

Item URL in elib:https://elib.dlr.de/122180/
Document Type:Article
Title:Quasicrystal nucleation and Z module twin growth in an intermetallic glass-forming system
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Hornfeck, W.hornfeck (at) fzu.czUNSPECIFIED
Kobold, Raphaelraphael.kobold (at) dlr.deUNSPECIFIED
Kolbe, Matthiasmatthias.kolbe (at) dlr.deUNSPECIFIED
Herlach, Dieterdieter.herlach (at) dlr.deUNSPECIFIED
Date:3 October 2018
Journal or Publication Title:Nature Communications
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
DOI :10.1038/s41467-018-06597-0
Publisher:Nature Publishing Group
Keywords:Quasikristall, Erstarrung, Levitation, Kristallzwilling, Mikrostruktur, EBSD, HAADF, Nukleation, nucleation, solidification, twin growth, microstructure, quasicrystal
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Research under Space Conditions
DLR - Research theme (Project):R - Materials Research and Microgravity (MuM)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space > Scientific Experiments MP
Deposited By: Kobold, Raphael
Deposited On:15 Oct 2018 07:26
Last Modified:15 Oct 2018 07:26

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