摘要
采用PIP工艺向初始密度分别为0.90,1.01和1.12 g/cm3的SiC粉末混编炭纤维预制体中引入SiC,制备密度为2.10 g/cm3的C/C-SiC复合材料。通过C/C-SiC复合材料微观结构、力学性能、1200℃高温抗氧化及等离子耐烧蚀性能研究,揭示预制体密度对C/C-SiC复合材料力学、高温抗氧化及耐烧蚀性能的影响规律。研究结果表明:预制体密度对制备的C/C-SiC复合材料微观结构、力学及高温抗氧化耐烧蚀性能具有重要影响;随着预制体密度增加,复合材料的弯曲强度由204.17 MPa提升至238.32 MPa,压缩强度由335.9 MPa提升至441.4 MPa;等离子火焰烧蚀60 s后,其质量烧蚀率由0.162 mg/s降低至0.123 mg/s;经1200℃,60 min氧化后,C/C-SiC复合材料的氧化质量损失率随预制体密度升高而降低,高温抗氧化性能逐渐升高。
The SiC powder mixed carbon fiber preforms with initial densities of 0.90,1.01 and 1.12 g/cm3 were densified by PIP process to prepare C/C-SiC composites with a density of 2.10 g/cm3.Through the study of the microstructure,mechanical properties,high temperature anti-oxidation and plasma ablation resistance of C/C-SiC composites,the effects of the preform density on the mechanical,high temperature oxidation resistance and ablative property of C/C-SiC composites were discussed.The results show that the density of the preform has an important influence on the microstructure,mechanical,anti-oxidation and ablative properties of the prepared C/C-SiC composites.As the density of the preform increases,the flexural strength of the composites increases from 204.17 MPa to 238.32 MPa,and the compressive strength increases from 335.9 MPa to 441.4 MPa;after plasma flame ablation for 60 s,the mass ablation rate decreases from 0.162 mg/s to 0.123 mg/s.After oxidation at 1200℃in air for 60 min,the mass loss rate of C/C-SiC composites decreases with the increase of density of the preform,indicating the improved high temperature oxidation resistance of the composites.
作者
阳惠
刘瑞瑞
刘忠国
杨静
左远名
李昂
易近人
杨鑫
黄启忠
YANG Hui;LIU Ruirui;LIU Zhongguo;YANG Jing;ZUO Yuanming;LI Ang;YI Jinren;YANG Xin;HUANG Qizhong(State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China)
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2022年第7期2447-2456,共10页
Journal of Central South University:Science and Technology
基金
国家自然科学基金联合基金资助项目(U19A2088)
中南大学大学生创新创业训练计划项目(2020105330090)。
