Approximant-based orientation determination of quasicrystals using electron backscatter diffraction

Grzegorz Cios; Gert Nolze; Aimo Winkelmann; Tomasz Tokarski; Ralf Hielscher; Radoslaw Strzałka; Ireneusz Bugański; Janusz Wolny; Piotr Bała

doi:10.1016/j.ultramic.2020.113093

Approximant-based orientation determination of quasicrystals using electron backscatter diffraction

Ultramicroscopy. 2020 Nov:218:113093. doi: 10.1016/j.ultramic.2020.113093. Epub 2020 Aug 14.

Authors

Grzegorz Cios¹, Gert Nolze², Aimo Winkelmann³, Tomasz Tokarski⁴, Ralf Hielscher⁵, Radoslaw Strzałka⁶, Ireneusz Bugański⁶, Janusz Wolny⁶, Piotr Bała⁷

Affiliations

¹ Academic Centre for Materials and Nanotechnology, AGH University of Science and Technology, al. A. Mickiewicza 30, Krakow 30-059, Poland. Electronic address: Ciosu@agh.edu.pl.
² Federal Institute for Materials, Research and Testing (BAM), Unter den Eichen 87, Berlin 12205, Germany; TU Bergakademie Freiberg, Institute for Mineralogy, Brennhausgasse 14, Freiberg, 09596 Germany.
³ Academic Centre for Materials and Nanotechnology, AGH University of Science and Technology, al. A. Mickiewicza 30, Krakow 30-059, Poland; Department of Physics, SUPA, University of Strathclyde, Glasgow G4 0NG, United Kingdom.
⁴ Academic Centre for Materials and Nanotechnology, AGH University of Science and Technology, al. A. Mickiewicza 30, Krakow 30-059, Poland.
⁵ Technical University Chemnitz, Department of Mathematics, Reichenhainer Straße 39, Chemnitz 09126, Germany.
⁶ Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, al. A. Mickiewicza 30, 30-059 Krakow, Poland.
⁷ Academic Centre for Materials and Nanotechnology, AGH University of Science and Technology, al. A. Mickiewicza 30, Krakow 30-059, Poland; Faculty of Metals and Industrial Computer Science, AGH University of Science and Technology, al. A. Mickiewicza 30, Krakow 30-059, Poland.

PMID: 32920465
DOI: 10.1016/j.ultramic.2020.113093

Abstract

Orientation mapping of quasicrystalline materials is demonstrated using crystalline approximant structures in the technique of electron backscatter diffraction (EBSD). The approximant-based orientations are symmetrised according to the rotational point group of the quasicrystal, including the visualization of orientation maps using proper colour keys for quasicrystal symmetries. Alternatively, approximant-based orientation data can also be treated using pseudosymmetry post-processing options in the EBSD system software, which enables basic grain size estimations. Approximant-based orientation analyses are demonstrated for icosahedral and decagonal quasicrystals.

Keywords: Approximant; Crystal orientation; Data processing,; EBSD; Quasicrystal.