Study on Microstructures of 2D and 3D Chemical Vapor Infiltration SiC/SiC Composites,Advanced Engineering Materials

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Study on Microstructures of 2D and 3D Chemical Vapor Infiltration SiC/SiC Composites
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2020-03-26 , DOI: 10.1002/adem.201900880
Hao Yan _{1,

2} , Ke Li _{2,

3} , Yantao Gao ₂ , Yi Yang ₁ , Juan Hou ₁ , Aijun Huang ₂

Affiliation

The chemical vapor infiltration (CVI) SiC/SiC composites are porous materials, and the porosity affects the molten salt infiltration and may affect the mechanical properties. Therefore, the internal microstructures of the 2D and 3D silicon carbide composites are studied by synchrotron radiation micro‐computed tomography (micro‐CT) technology. The cross‐sectional slice and 3D volume image of the composite are reconstructed, then the pores of the composites are visualized in three dimensions, and the porosity is quantitatively analyzed. The results indicate that most of small pores (micrometer) exist between filaments and larger pores (millimeter) occur between fiber bundles, and the internal pores of 2D and 3D composites are greatly influenced by the fabric structure. In contrast, the 3D braided composites have lower porosity, smaller pore distribution fluctuations, and more stable internal structure.

中文翻译：

2D和3D化学气相渗透SiC / SiC复合材料的微观结构研究

化学气相渗透（CVI）SiC / SiC复合材料是多孔材料，孔隙率会影响熔融盐的渗透并可能影响机械性能。因此，通过同步辐射微计算机断层扫描（micro-CT）技术研究了2D和3D碳化硅复合材料的内部微观结构。重建复合材料的横截面切片和3D体积图像，然后在三个维度上可视化复合材料的孔，并定量分析孔隙率。结果表明，大多数细孔（微米）存在于长丝之间，较大的孔（毫米）存在于纤维束之间，并且2D和3D复合材料的内部孔隙受织物结构的影响很大。相比之下，3D编织复合材料的孔隙率较低，

更新日期：2020-03-26

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