A study on the indexing method of the electron backscatter diffraction pattern assisted by the Kikuchi bandwidth.

Area of Science:

• Materials Science
• Crystallography
• Analytical Chemistry

Background:

• Electron Backscatter Diffraction (EBSD) is a crucial scanning electron microscope technique for analyzing crystal structures.
• Accurate indexing of EBSD patterns is essential for reliable materials characterization.
• Existing methods can face challenges with materials exhibiting high symmetry or similar crystallographic features.

Purpose of the Study:

• To develop and validate a novel method for indexing EBSD patterns.
• To improve the precision and efficiency of EBSD pattern indexing.
• To address limitations in distinguishing similar crystallographic orientations using traditional methods.

Main Methods:

• A new indexing method was developed, integrating Kikuchi bandwidth with interplanar angles and spacings.
• The method was validated using single-crystal silicon samples.
• Key steps involved detecting EBSD Kikuchi band edges and calculating Kikuchi bandwidths.

Main Results:

• The study established a relationship between Kikuchi bandwidth and interplanar spacing.
• Accurate calculation of interplanar spacings for lattice planes was achieved using Kikuchi bandwidth information.
• Experimental results showed small relative errors, averaging 2.6%, with a minimum of 1.04%.

Conclusions:

• The developed method accurately determines Miller indices for Kikuchi bands in EBSD patterns.
• Integrating Kikuchi bandwidth significantly enhances the efficiency and accuracy of EBSD indexing.
• This technique is particularly beneficial for materials with high symmetry, improving indexing reliability.