SiC_(f)/SiC复合材料的RMI制备方法以及微观结构和性能优化  

Optimizing Microstructure and Properties of SiC_(f)/SiC Composites Prepared by Reactive Melt Infiltration

作　　者：张俊敏 陈小武[1,2] 廖春景[1,2] 郭斐宇 杨金山[1,2] 张翔宇[1,2] 董绍明[1,2] ZHANG Junmin;CHEN Xiaowu;LIAO Chunjin;GUO Feiyu;YANG Jinshan;ZHANG Xiangyu;DONG Shaoming(State Key Laboratory of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China;Structural Ceramics and Composites Engineering Research Center,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China;School of Physical Science and Technology,Shanghai Tech University,Shanghai 200031,China)

机构地区：[1]中国科学院上海硅酸盐研究所,高性能陶瓷和超微结构国家重点实验室,上海200050 [2]中国科学院上海硅酸盐研究所,结构陶瓷及复合材料工程研究中心,上海200050 [3]上海科技大学物理科学与技术学院,上海200031

出　　处：《无机材料学报》2021年第10期1103-1110,共8页Journal of Inorganic Materials

基　　金：National Natural Science Foundation of China(51902328);Science and Technology Commission of Shanghai Municipality(19ZR1464700);Innovation Academy for Light-duty Gas Turbine,CAS(CXYJJ20-QN-09);Chinese Academy of Sciences(QYZDY-SSW-JSC031);Key Deployment Project of the Chinese Academy of Sciences(ZDRW-CN-2019-01)。

摘　　要：反应熔体渗透(RMI)是制备高密度陶瓷基复合材料的有效方法之一,而熔体的渗透和复合材料的形成主要取决于预制体的孔隙结构。本研究将硅熔体渗透到具有不同孔隙结构的含碳预制体中,制备了SiC纤维增强SiC基复合材料(SiC_(f)/SiC),并研究了孔隙结构对熔体浸润和SiC_(f)/SiC复合材料的影响。研究结果表明:具有较均匀孔径的预制体可以使熔体浸润更充分,制备的复合材料具有更少的残余孔隙及更优的力学性能。该研究对反应熔渗制备复合材料的孔结构调控具有指导意义。Reactive melt infiltration(RMI)is one of the most effective methods to prepare highly dense ceramic matrix composites.The melt infiltration and the formation of composites are mainly determined by the pore structure of preforms.Here,SiC fiber reinforced SiC matrix composites(SiC_(f)/SiC)were prepared by infiltrating Si melt into carbon-contained preforms with various pore structures.Effects of pore structure on the melt infiltration and received SiC_(f)/SiC composites were investigated.The results indicated that the preforms with more homogeneous pore size could lead to more sufficient melt infiltration,and also resulted in fewer residual pores and better mechanical properties in the composites.This study is expected to provide important guidance for the pore structure regulation in the fabrication of RMI-composites.

关 键 词：SiC_(f)/SiC复合材料 反应熔渗(RMI) 孔隙结构 微观结构 熔渗动力学 

分 类 号：TQ174[化学工程—陶瓷工业]