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Microcomputed X-Ray Tomographic Imaging and Image Processing for Microstructural Characterization of Explosives.

John D Yeager1, Lindsey A Kuettner2, Amanda L Duque1

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Materials (Basel, Switzerland)
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Summary
This summary is machine-generated.

Advanced X-ray tomography and image processing enable detailed 3D microstructural analysis of composite high explosives (HEs). This technique improves understanding of material properties and reactive behaviors for better mesoscale modeling.

Keywords:
compositesdual energyexplosivesmicrocomputed tomographymicrostructurepolymer matrix compositessegmentation

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Physics

Background:

  • Microstructural characterization of composite high explosives (HEs) is crucial for understanding ignition and detonation.
  • HE microstructure impacts material properties and reactive behaviors like shock sensitivity.
  • 3D examination is limited by poor contrast in composite constituents, especially in highly loaded plastic-bonded explosives (PBXs).

Purpose of the Study:

  • To enhance measurement quality for 3D microstructural examination of HE materials.
  • To investigate the effectiveness of single and dual-energy microcomputed X-ray tomography (micro-CT) and advanced image processing.
  • To study a broad set of HE materials, including challenging PBXs.

Main Methods:

  • Utilized single and dual-energy micro-CT.
  • Applied state-of-the-art image processing and commercially available algorithms.
  • Focused on segmentation of HE constituents, voids, cracks, and zero-density defects.

Main Results:

  • Achieved suitable contrast and resolution for automatic segmentation in materials like PBX 9502.
  • Demonstrated varying segmentation success for different composite HEs.
  • Successfully segmented zero-density defects (cracks, voids) in all samples using post-processing techniques.

Conclusions:

  • Micro-CT combined with advanced image processing offers a powerful tool for HE microstructure analysis.
  • The technique shows promise for characterizing complex composite explosives and defects.
  • Further investigation is needed to optimize segmentation for all HE composite types.