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首页> 外文期刊>Journal of the Ceramic Society of Japan >Improvement in matrix microstructure of SiC/SiC composites by incorporation of pore-forming powder
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Improvement in matrix microstructure of SiC/SiC composites by incorporation of pore-forming powder

机译：通过掺入造孔粉改善SiC / SiC复合材料的基体组织

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In order to improve the matrix microstructure of SiC-fiber-reinforced SiC matrix (SiC/SiC) composite, the authors examined a combination process involving the polymer impregnation and pyrolysis (PIP) process and a pore-producing treatment that incorporates a pore-forming agent into the matrix precursor. Unidirectional SiC/SiC composites were fabricated under such conditions of selected slurry preparation that a good porous monolith could be obtained. A porous matrix base was formed relatively uniformly in both the intra- and the inter-bundle region in the first PIP processing, and subsequently densified efficiently by repetitive process cycles of PIP. By comparing the resulting composites with those fabricated via the conventional PIP process, it was verified that this newly attempted fabrication process is advantageous in lowering the porosity, particularly by reducing the size of the intra-bundle pores, and leads to an improvement in some representative mechanical properties.
机译：为了改善SiC纤维增强SiC基复合材料（SiC / SiC）的基体微观结构，作者研究了包括聚合物浸渍和热解（PIP）工艺以及结合了孔形成的造孔处理的组合工艺。剂进入基质前体。在选择浆料制备的条件下制备了单向SiC / SiC复合材料，从而可以获得良好的多孔整料。在第一个PIP处理中，在束内和束间区域均相对均匀地形成了多孔基质基底，随后通过重复的PIP处理循环有效地致密化。通过将所得复合材料与通过常规PIP工艺制造的复合材料进行比较，证实了这种新尝试的制造工艺特别是通过减小束内孔的尺寸，有利于降低孔隙率，并改善了某些代表性产品。机械性能。

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