SiC/SiC Composites Produced by the Combinational Process of Polymer Impregnation & Pyrolysis and Chemical Vapor Infiltration: a Comparative Microstructure and Properties Study upon 2.5D and 3D Braiding Structures
ZHAO Shuang1, YANG Zichun1, ZHOU Xingui2
1 Institution of High-temperature Structural Composites for Ship, Naval University of Engineering, Wuhan 430033; 2 Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology, Changsha 410073
Abstract: By applying the combinational process of polymer impregnation & pyrolysis and chemical vapor infiltration (PIP+CVI), the present work successfully carried out the fabrication of a 2.5 dimensional and a 3 dimensional SiC/SiC composite, as well as the porosity, thermal conductivity, mechanical property and microstructure characterization and analyses for the products. The low density (1.98-2.43 g·cm-3) and low thermal conductivity (0.85-2.08 W·m-1·K-1) of the PIP+CVI 2.5D and 3D SiC/SiC composites could be confirmed from the experiment. And moreover, it can be deduced that the pre-weave CVI fiber coating improves the fiber-matrix interface shear strength and hence the resultant composite’s mechanical properties, while the effectiveness of post-pyrolysis overall CVI coating toward the density, thermal conductivity and mechanical properties promotion is notable for the 2.5D SiC/SiC composite but inconspicuous for the 3D one.
赵爽, 杨自春, 周新贵. 先驱体浸渍裂解结合化学气相渗透工艺下二维半和三维织构SiC/SiC复合材料的结构与性能[J]. 材料导报, 2018, 32(16): 2715-2718.
ZHAO Shuang, YANG Zichun, ZHOU Xingui. SiC/SiC Composites Produced by the Combinational Process of Polymer Impregnation & Pyrolysis and Chemical Vapor Infiltration: a Comparative Microstructure and Properties Study upon 2.5D and 3D Braiding Structures. Materials Reports, 2018, 32(16): 2715-2718.
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2018, Vol. 32 
