Feasibility study of phase-contrast X-ray laminography using X-ray interferometry

Area of Science:

• Materials Science
• Geology
• Physics

Background:

• Laminar sample analysis requires high-resolution imaging techniques.
• Existing methods may lack the necessary detail for complex internal structures.

Purpose of the Study:

• To develop a novel phase-contrast X-ray laminography technique for fine observation of laminar samples.
• To demonstrate the capability of the developed system in visualizing microstructures.

Main Methods:

• Development of a phase-contrast X-ray laminography system utilizing X-ray interferometry.
• Employing a two-crystal X-ray interferometer for imaging.
• Utilizing a three-dimensional iterative reconstruction method for sectional image calculation.

Main Results:

• Successfully imaged an old limestone slab, revealing Carboniferous fusulinids with high density resolution (3 mg cm⁻³).
• Clearly visualized the inner fibrous structures of carbon paper used in fuel-cell batteries.
• Demonstrated the technique's effectiveness for diverse laminar materials.

Conclusions:

• Phase-contrast X-ray laminography is a powerful tool for detailed analysis of laminar samples.
• The developed system offers high resolution and clarity for microstructural imaging.
• This technique has potential applications in geology, materials science, and beyond.