Effects of Ablation Angle on the Ablation Behavior of C/C Composites

ZHA Bai-lin, GAO Shuang-lin, LIN Hao, LUO Lei, ZHANG Bo-wen, ZHU Jie-tang, SUN Zhen-sheng
2017 Journal of Materials Engineering  
There is a significant impact of ablation angle on the anti-ablation performance of C/C composites. A self-designed oxygen-kerosene ablation system was employed to study the ablation behavior and mechanism of C/C composites. Typical ablation angle of the experiment was 90°, 60°, 45° respectively, and particle concentration of the gas-solid two-phase ablation flow was 1.37%. The microstructure of post-test samples was observed with the scanning electron microscope(SEM), and the ablation rate of
more » ... amples was also calculated. The result shows that when the ablation angle is 90°, 60°, 45°,the corresponding mass ablation rate for ablation experiment is 0.146,0.123,0.100g/s respectively. With the decrease of ablation angle, the mass ablation rate of samples is decreased gradually; while for the samples affected by particle erosion, the corresponding mass ablation rate is 0.452,0.455,0.432g/s and the line ablation rate is 1.863,1.323,0.843mm/s. The mass ablation rate is approximately unchanged and the line ablation rate is decreased. The smaller the ablation angle is, the more serious the thermalchemical ablation of gas, and thus increase the erosion area of axial fiber bundle under ablation condition and ablation gradient of radial fiber under ablation/erosion condition.
doi:10.11868/j.issn.1001-4381.2015.000527 doaj:864d3e4c02ae4d89b4c06d562a55711b fatcat:i6oldmnjabfwnb3fw3ybdvjoti