Effect of Particle Concentration on Ablation Behavior of Carbon/Carbon Composites

ZHA Bai-lin, LIN Hao, GAO Shuang-lin, LUO Lei, ZHANG Bo-wen, ZHU Jie-tang, SUN Zhen-sheng
2016 Journal of Materials Engineering  
A self-designed oxygen-kerosene ablation system was employed to study the ablation mechanism and performance of the carbon-carbon composites. Particle concentrations of the gas-solid two-phase ablation flow were 0, 1.37%, 2.22%, and 2.64% respectively. The microstructure of post-test samples was analysed through the scanning electron microscope (SEM), and the ablation rate was calculated. The influence principle of particle concentrations on the ablation rate of the carbon-carbon composites was
more » ... studied, and the mechanism of ablation was analysed. Experiment results show that with no particles involved the mass ablation rate is 0.159g/s and the linear ablation rate is 0.175mm/s, while with particles introduced, the minimum mass ablation rate and linear ablation rate are 0.432g/s and 0.843mm/s respectively, with the increase of particle concentrations, the ablation rate becomes accelerated. Particle erosion makes the ablation of sample seriously intensified, and the ablation gradient of radial fiber on erosion surface is increased with the increase of particle concentrations as well.
doi:10.11868/j.issn.1001-4381.2016.07.016 doaj:2cf0cbc6ca2e49e6bf9eb86a07d17490 fatcat:sjia5ouh7bgbjpk2q2a6efjike