Use of quantitative convergent-beam electron diffraction in materials science.

Area of Science:

• Materials Science
• Crystallography
• Electron Microscopy

Background:

• Convergent-beam electron diffraction (CBED) is a powerful technique for crystal structure analysis.
• Quantitative analysis using CBED requires robust methodologies for accurate data interpretation.

Purpose of the Study:

• To outline methods for quantitative convergent-beam electron diffraction (CBED).
• To present applications of CBED for materials science, focusing on crystal structure analysis.
• To demonstrate the utility of CBED for determining various structural parameters.

Main Methods:

• Detailed methodologies for quantitative convergent-beam electron diffraction (CBED) analysis.
• Application of CBED for precise thickness measurements and lattice parameter determination.
• Utilizing CBED to measure low-order structure factors for charge-density distribution analysis.

Main Results:

• Demonstrated thickness measurements and lattice parameter determination using CBED.
• Presented results on bonding charge-density distributions in TiAl intermetallics via structure factor measurements.
• Successfully applied CBED for determining three-phase structure invariants and crystal polarity in non-centrosymmetric crystals.

Conclusions:

• Quantitative CBED is a versatile tool for comprehensive crystal structure characterization.
• CBED provides critical insights into bonding and polarity, essential for advanced materials development.
• The presented methods enhance the application of electron diffraction in materials science research.