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Quantitative characterization of the carbon/carbon composites components based on video of polarized light microscope
Author(s) -
Li Yixian,
Qi Lehua,
Song Yongshan,
Chao Xujiang
Publication year - 2017
Publication title -
microscopy research and technique
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.536
H-Index - 118
eISSN - 1097-0029
pISSN - 1059-910X
DOI - 10.1002/jemt.22842
Subject(s) - composite material , reinforced carbon–carbon , optical microscope , materials science , microstructure , carbon fibers , polarized light microscopy , microscope , characterization (materials science) , matrix (chemical analysis) , extinction (optical mineralogy) , thermal , composite number , scanning electron microscope , optics , nanotechnology , physics , meteorology
The components of carbon/carbon (C/C) composites have significant influence on the thermal and mechanical properties, so a quantitative characterization of component is necessary to study the microstructure of C/C composites, and further to improve the macroscopic properties of C/C composites. Considering the extinction crosses of the pyrocarbon matrix have significant moving features, the polarized light microscope (PLM) video is used to characterize C/C composites quantitatively because it contains sufficiently dynamic and structure information. Then the optical flow method is introduced to compute the optical flow field between the adjacent frames, and segment the components of C/C composites from PLM image by image processing. Meanwhile the matrix with different textures is re‐segmented by the length difference of motion vectors, and then the component fraction of each component and extinction angle of pyrocarbon matrix are calculated directly. Finally, the C/C composites are successfully characterized from three aspects of carbon fiber, pyrocarbon, and pores by a series of image processing operators based on PLM video, and the errors of component fractions are less than 15%.