Feature of carbon/carbon composites based on micro-CT
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摘要: 采用显微电子计算机断层扫描检测（CT）对C/C复合材料进行三维成像，通过断层图像观察试样内部的孔隙、裂纹和夹杂等微结构缺陷。结合阈值分割法等分别实现了孔隙、裂纹和夹杂的三维分割与提取，并进行了定位、定量分析。通过统计分析得到区域存在15 261个孔隙、25个夹杂。孔隙平均直径为0.41 mm，73.25%的孔隙直径小于0.41 mm，大部分的孔隙呈球形或近球形结构，体积孔隙率为7.56%。通过显微CT的高分辨率重建了C/C复合材料的结构特征，对内部微结构进行了特征提取与统计量化分析。Abstract: Three dimensional imaging of C/C composites was performed using micro-CT, microstructure defects such as voids, crack and inclusions were observed through the CT images. Three dimensional segmentation and extraction of voids, crack and inclusions were realized respectively by threshold segmentation etc, and the location and quantitative analysis were performed. Statistical analysis results show that there are 15261 voids and 25 inclusions in measurement volume. The average diameter size of void is 0. 41 millimeters, about 73. 25% void diameters are less than 0. 41 millimeters, and most of voids shapes are spherical or near spherical, the volume porosity of the specimen is 7. 56%. The structure characteristics of C/C composites were reconstructed by high resolution micro-CT, and the characteristics of the internal microstructure were extracted and statistical quantitative analysis were performed.
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Keywords:
- carbon/carbon composite /
- micro computed tomography /
- visualization /
- porosity
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