Uniform microstructures with a low percentage of well distributed porosity could possibly demonstrate high ballistic strength; therefore, it is of interest to estimate the parameters that define the spatial arrangement of defects. This aspect of microstructures was investigated in a sintered armor SiC tile. A set of several tiles had been previously scanned by ultrasound and one tile from that set was selected for further evaluation. High and low amplitude regions in the C-scan image were examined using diced pieces from those areas. Acoustically varied regions were studied by optical microscopy. Segmentation of these artifacts and image analysis were performed. Initially, results on size of features were obtained. Subsequent spatial data analysis was performed to quantify microstructures in terms of homogeneity. Nearest neighbor distance distributions were utilized to study spatial distribution of artifacts. Quasi-static property measurements were employed to confirm microstructural findings. Correlations with ultrasound results were obtained and will be presented.
Microstructural examination and quasi-static property determination of sintered armor grade SiC
2009
9 Seiten, 15 Quellen
Conference paper
English
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