C/SiC-SiO_(2)复合材料的制备及性能研究  

The Research on Preparation and Properties of C/SiC-SiO_(2) Composites

作　　者：王兆可 龚晓冬[1] 孙新[1] 张国兵[1] 李军平[1] WANG Zhaoke;GONG Xiaodong;SUN Xin;ZHANG Guobing;LI Junping(Aerospace Research Institute of Materials&Processing Technology,Beijing 100076)

机构地区：[1]航天材料及工艺研究所,北京100076

出　　处：《宇航材料工艺》2022年第1期65-70,共6页Aerospace Materials & Technology

基　　金：基础加强重大项目(90070380030101032101)。

摘　　要：采用溶胶凝胶和前驱体浸渍裂解混合工艺,制得了不同SiO_(2)/SiC比例的C/SiC-SiO_(2)复合材料,研究了SiO_(2)添加量对复合材料微观结构、力学性能的影响。结果表明:当添加SiO_(2)的质量分数约25%时,材料的拉伸强度和压缩强度与C/SiC材料性能相当;而当添加SiO_(2)的质量分数超过25%时,材料的强度与模量均随SiO_(2)含量的增加呈降低趋势。此外,SiO_(2)含量约25%的C/SiC-SiO_(2)复合材料的浸渍相成本较C/SiC材料降低约24%左右,这为C/SiC复合材料的快速低成本制备提供了新的技术支撑。The C/SiC-SiO_(2) composites with different SiO_(2)/SiC ratios were prepared by sol-gel-PIP process.The effect of SiO_(2) content on the microstructure and mechanical properties of the composites was investigated.The results show that the tensile and compressive strength of C/SiC-SiO_(2) composites with the mass fraction of SiO_(2) no more than 25%are close to those of C/SiC composites.When the mass fraction of SiO_(2) added exceeds 25%,the strength and modulus of composites decrease with increasing of SiO_(2) content.It is worthy to mention that the fabrication cost of C/SiC-SiO_(2) composite with 25%SiO_(2) content is 24%lower than that of C/SiC composite,which provides a new technical approach for the rapid and low-cost preparation of C/SiC composites.

关 键 词：C/SiC-SiO_(2)复合材料 溶胶凝胶 PIP工艺 微观形貌 力学性能 低成本 

分 类 号：TB332[一般工业技术—材料科学与工程]