Volume determination of TEM specimens containing particles or precipitates

Area of Science:

• Materials Science
• Microscopy
• Crystallography

Background:

• Accurate determination of particle density and spacing in thin foil specimens is essential for understanding material properties.
• Transmission Electron Microscopy (TEM) is a key technique for visualizing nanoscale features.
• Quantifying particle distribution requires precise volume estimation.

Purpose of the Study:

• To develop and validate a novel method for calculating the volume of thin foil specimens containing particles using TEM stereo pairs.
• To provide a correction factor for improving the accuracy of volume estimation.
• To apply the method to analyze precipitate particles in silicon carbide.

Main Methods:

• Utilizing particle locations measured from TEM stereo pairs.
• Implementing a calculation to determine the volume between enclosing planes.
• Applying a correction factor based on the number of data points for enhanced accuracy.

Main Results:

• The described method accurately estimates the volume of specimens containing particles.
• A correction factor was developed to compensate for systematic underestimation of surface spacing.
• The method was successfully applied to analyze precipitate particles in creep-tested silicon carbide.

Conclusions:

• The developed stereo imaging method offers a reliable approach for estimating particle volume in TEM.
• This technique enhances the quantitative analysis of particle distribution in materials.
• The findings are significant for research in materials science, particularly for creep-tested silicon carbide.