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Practical phase identification by convergent beam electron diffraction.

J Mansfield1

  • 1North Campus Electron Microbeam Analysis Laboratory, University of Michigan, Ann Arbor 48109-2143.

Journal of Electron Microscopy Technique
|September 1, 1989
PubMed
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This guide details phase identification using analytical electron microscopy and convergent beam electron diffraction. It offers practical steps for specimen preparation, reciprocal space exploration, and phase analysis via symmetry or fingerprinting.

Area of Science:

  • Materials Science
  • Crystallography
  • Analytical Chemistry

Background:

  • Accurate phase identification is crucial in materials science for understanding material properties and performance.
  • Analytical electron microscopy (AEM) offers high spatial resolution for microstructural analysis.
  • Convergent beam electron diffraction (CBED) is a powerful technique for crystallographic analysis in AEM.

Purpose of the Study:

  • To provide a practical, step-by-step guide for identifying crystalline phases using AEM with CBED.
  • To outline methods for specimen preparation and reciprocal space exploration for effective phase analysis.
  • To detail phase identification strategies, including symmetry analysis and pattern fingerprinting.

Main Methods:

  • Specimen preparation techniques suitable for CBED analysis.

Related Experiment Videos

  • Systematic exploration of reciprocal space within the analytical electron microscope.
  • Phase identification through crystallographic symmetry analysis of diffraction patterns.
  • Phase identification by comparing observed diffraction patterns with a database (fingerprinting).

    • Main Results:

    • A comprehensive methodology for phase identification in AEM using CBED.
    • Practical tips and shortcuts to streamline the phase analysis workflow.
    • Demonstration of both symmetry-based and fingerprinting approaches for accurate phase determination.

    Conclusions:

    • CBED in AEM provides a robust method for precise phase identification.
    • The presented guide enhances the practical application of CBED for materials characterization.
    • This approach facilitates routine and accurate phase analysis in diverse material systems.