Ablation properties of carbon/carbon composites with tungsten carbide |
| |
Authors: | Jian Yin Hongbo Zhang Xiang Xiong Baiyun Huang Jinlv Zuo |
| |
Institution: | State Key Laboratory of Powder Metallurgy, Central South University, South Lushan Road, Changsha 410083, China |
| |
Abstract: | The ablation properties and morphologies of carbon/carbon (C/C) composites with tungsten carbide (WC) filaments were investigated by ablation test on an arc heater and scanning electron microscopy. And the results were compared with those without tungsten carbide (WC) filaments tested under the same conditions. It shows that there is a big difference between C/C composites with and without WC filaments on both macroscopic and microscopic ablation morphologies and the ablation rates of the former are higher than the latter. It is found that the ablation process of C/C composites with WC filaments includes oxidation of carbon fibers, carbon matrices and WC, melting of WC and WO3, and denudation of WC, WO3 and C/C composites. Oxidation and melting of WC leads to the formation of holes in z directional carbon fiber bundles, which increases the coarseness of the ablation surfaces of the composites, speeds up ablation and leads to the higher ablation rate. Moreover, it is further found that the molten WC and WO3 cannot form a continuous film on the ablation surface to prevent further ablation of C/C composites. |
| |
Keywords: | Carbon/carbon composites WC filament Ablation morphology Ablation property |
本文献已被 ScienceDirect 等数据库收录! |
|