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Microcrystal Electron Diffraction of Small Molecules
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Reflector Selection for the Indexing of Electron Backscatter Diffraction Patterns.

Stuart I Wright1, Saransh Singh2, Marc De Graef3

  • 1EDAX,392 East 12300 South,Suite H, Draper, UT 84020,USA.

Microscopy and Microanalysis : the Official Journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada
|March 28, 2019
PubMed
Summary
This summary is machine-generated.

A new method improves electron backscatter diffraction (EBSD) pattern indexing by using integrated Kikuchi band intensity (βhkl) over traditional factors. This enhances accuracy for complex materials, boosting indexing confidence.

Keywords:
EBSDdynamical simulationselectron backscatter diffractionindexing

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Area of Science:

  • Materials Science
  • Crystallography
  • Electron Microscopy

Background:

  • Electron Backscatter Diffraction (EBSD) is crucial for materials characterization.
  • Traditional Hough-based indexing relies on kinematical intensity (Fhkl) for reflector ranking.
  • Limitations exist in accurately indexing complex crystal structures.

Purpose of the Study:

  • To introduce a novel parameter for ranking reflectors in EBSD pattern indexing.
  • To evaluate the effectiveness of the integrated Kikuchi band intensity parameter (βhkl).
  • To compare βhkl with existing methods for indexing diverse material systems.

Main Methods:

  • Developed and applied the integrated Kikuchi band intensity parameter (βhkl).
  • Compared βhkl ranking against kinematical intensity (Fhkl) and average Hough transform peak intensity.
  • Indexed EBSD patterns for nickel, silicon, rutile, and forsterite samples.

Main Results:

  • βhkl closely matches kinematical ranking for elemental structures.
  • Significant ranking differences observed for complex unit cells.
  • βhkl shows better correlation with integrated Hough intensities for complex materials.

Conclusions:

  • The βhkl parameter offers improved reflector ranking for EBSD.
  • Enhanced accuracy in indexing complex crystal structures was demonstrated.
  • Median confidence index improved significantly (0.15 to 0.35) using βhkl for forsterite.