Multiscale characterization and representation of variability in ceramic matrix composites

Khaled H. Khafagy, Siddhant Datta, Aditi Chattopadhyay

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


Low density, high strength, and high creep and oxidation resistance properties of ceramic matrix composites (CMCs) make them an ideal choice for use in extreme environments in space and military applications. This paper presents a detailed characterization study of structural and manufacturing flaws in Carbon fiber Silicon-Carbide-Nitride matrix (C/SiNC) CMCs at different length-scales. Energy-dispersive spectroscopy (EDS) is used for the chemical characterization of the material’s elemental constituents. High-resolution multiscale graphs obtained from scanning electron microscope (SEM) and confocal laser scanning microscope (LSM) are used to characterize the distribution and morphology of defects at different length scales. This is followed by the classification and quantification of the common manufacturing defects. An image processing algorithm based on the image segmentation process is developed to quantify the variability of various scale-dependent architectural parameters. Finally, a three-dimensional stochastic representative volume element (SRVE) generation algorithm is developed to provide precise representations of material textures at multiple length scales. The developed algorithm accurately accounts for material features and flaws based on a range of multiscale structural and defects characterization results.

Original languageEnglish (US)
Pages (from-to)2431-2441
Number of pages11
JournalJournal of Composite Materials
Issue number18
StatePublished - Aug 2021


  • Ceramic matrix composites
  • defects
  • multiscale materials characterization
  • stochastic microstructure generation algorithm

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Materials Chemistry


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