کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1466907 | 990080 | 2011 | 6 صفحه PDF | دانلود رایگان |
The fabric architecture and porosity of three-dimensional (3D) Cf/SiCm composites are characterized using commercial X-ray microcomputed tomography (microCT). The non-destructive observation exhibits an inhomogeneous structure of the carbon fiber performs with gradiently distributed porosity. The shape of fiber bundles and porosity are investigated with respect to the gas transport during chemical vapor infiltration (CVI). Difference in growth rate of deposition between outer surface and inner porosity are identified through reconstructing the porosity morphology, which coincides well with the “node-bond” theoretical model. Moreover, in the light of the porosity features, gas retention and viscous flow is revealed to play key roles in the formation of the inner structure of Cf/SiCm.
Journal: Composites Part A: Applied Science and Manufacturing - Volume 42, Issue 11, November 2011, Pages 1645–1650