沉积热解炭与树脂炭比例对C/C-SiC复合材料弯曲强度的影响  

Effect of the Ratio of CVI-C/IC-C on the Flexural Strength of C-C/SiC Composites

作　　者：曹佩 王毅[1,2] 王旭东 杨晓辉[1,2] 白龙腾 CAO Pei;WANG Yi;WANG Xudong;YANG Xiaohui;BAI Longteng(Academy of Aerospace Propulsion Technology,Xi'an 710100,Shaanxi,China;Xi'an Aerospace Propulsion Institute,Xi'an 710100,Shaanxi,China)

机构地区：[1]航天推进技术研究院,陕西西安710100 [2]西安航天动力研究所,陕西西安710100

出　　处：《中国陶瓷工业》2024年第1期11-17,共7页China Ceramic Industry

摘　　要：以针刺整体炭毡为坯体,采用树脂浸渍和化学气相沉积混合的方法制备得到相同密度的C/C多孔体,采用熔硅浸渗(RMI)制得C/C-SiC复合材料。研究了沉积热解炭与树脂炭比例对基体显微结构及弯曲性能的影响。结果表明:随着沉积得到的沉积热解炭含量增加,C/C-SiC复合材料基体内部孔隙率先降后升,而密度、弯曲强度先增后减。当沉积热解炭与树脂炭的比例为1∶1时,C/C-SiC复合材料密度与弯曲强度最高,分别达到2.03 g/cm^(3)和240 MPa。Needling carbon fiber is used as the boby,resin impregnation and chemical vapor deposition were mixed in preparing C/C porous body of the same density.C/C-SiC composites were prepared using melt silicon infiltration.The effect of the ratio of CVI-C/IC-C on the microstructure and bending properties was studied.The results reveal that as the content of pyrolytic carbon coating increases,the density and bending strength of the C/C-SiC composites first increase and then decrease.The optimal density and bending strength were achieved when the ratio of pyrolytic carbon to resin carbon was 1:1,resulting in a density of 2.03 g/cm^(3) and a bending strength of 240 MPa.

关 键 词：沉积热解炭 树脂炭 C/C-SIC复合材料 弯曲强度 

分 类 号：TQ174.75[化学工程—陶瓷工业]