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Related Concept Videos

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Approximant-based orientation determination of quasicrystals using electron backscatter diffraction.

Grzegorz Cios1, Gert Nolze2, Aimo Winkelmann3

  • 1Academic Centre for Materials and Nanotechnology, AGH University of Science and Technology, al. A. Mickiewicza 30, Krakow 30-059, Poland.

Ultramicroscopy
|September 13, 2020
PubMed
Summary
This summary is machine-generated.

This study shows how to map quasicrystal orientations using electron backscatter diffraction (EBSD) with crystalline approximants. This method allows for detailed analysis and visualization of quasicrystalline structures.

Keywords:
ApproximantCrystal orientationData processing,EBSDQuasicrystal

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Area of Science:

  • Materials Science
  • Crystallography
  • Electron Microscopy

Background:

  • Quasicrystalline materials possess unique atomic structures with long-range order but no translational symmetry.
  • Characterizing the orientation of quasicrystals is crucial for understanding their properties.
  • Electron Backscatter Diffraction (EBSD) is a powerful technique for crystallographic orientation mapping.

Purpose of the Study:

  • To demonstrate a novel method for orientation mapping of quasicrystalline materials.
  • To adapt EBSD techniques, typically used for crystalline materials, to analyze quasicrystals.
  • To enable detailed visualization and analysis of quasicrystal symmetries and microstructures.

Main Methods:

  • Utilizing crystalline approximant structures to interpret EBSD data from quasicrystals.
  • Applying symmetrization procedures based on the specific point group symmetries of quasicrystals.
  • Employing pseudosymmetry post-processing options within EBSD software for data analysis.
  • Visualizing orientation maps with color keys tailored to quasicrystal symmetries.

Main Results:

  • Successful orientation mapping of icosahedral and decagonal quasicrystals was achieved.
  • Approximant-based orientation data allowed for symmetrization according to quasicrystal point groups.
  • Pseudosymmetry processing enabled basic grain size estimations for quasicrystalline materials.
  • The developed method provides a robust approach for analyzing quasicrystal microstructures.

Conclusions:

  • Orientation mapping of quasicrystals is feasible using crystalline approximants and EBSD.
  • The proposed symmetrization and post-processing techniques enhance the analysis of quasicrystal orientation data.
  • This approach facilitates a deeper understanding of quasicrystal crystallography and microstructure.