新型炭材料2017，Vol.32Issue(3)：265-270,6.
先驱体浸渍裂解法制备三维C/C-HfC复合材料及其烧蚀性能
Ablation behavior of a three-dimensional C/C-HfC composite prepared by a precursor infiltration and pyrolysis method
摘要
Abstract
A three-dimensional C/C-HfC composite with a density of 1.95 g/cm3 was fabricated by chemical vapor infiltration of carbon into a 3D woven carbon fiber felt to a density of 1.45 g/cm3 followed by vacuum impregnation and pyrolysis of a solution containing the HfC precursor.Results indicate that HfC particles are uniformly dispersed around the pyrocarbon.The 3D C/C-HfC composite exhibits a good ablation resistance at 2573 K.The mass and linear ablation rates after ablation for 120 s are 0.001 5 g/s and 0.002 4 mm/s, respectively.The resistance to ablation is attributed to the introduction of HfC into the C/C composite.The tree-coral-like HfO2 particles formed during the ablation act as thermal and oxygen diffusion barriers, protecting the composite from further ablation.Also, the oxidation of HfC and the volatilization of the ablation product (CO) absorb a large amount of heat from the composite.关键词
三维C/C-HfC复合材料/先驱体/耐烧蚀性能Key words
Three-dimensional C/C-HfC composites/Precursor/Ablation properties分类
化学化工引用本文复制引用
薛亮,苏哲安,杨鑫,黄启忠..先驱体浸渍裂解法制备三维C/C-HfC复合材料及其烧蚀性能[J].新型炭材料,2017,32(3):265-270,6.基金项目
国家科技支撑计划(2013BAE04B02).National Key Technology Support Program of China (2013BAE04B02). （2013BAE04B02）
