国防科技大学学报Issue(1)：20-25,6.DOI:10.11887/j.cn.201601004
改性 C／C 复合材料快速制备与抗烧蚀性能考核
Rapid fabrication and ablation resistance test of modified C/C composite
摘要
Abstract
The modified C /C composite was quickly prepared by the approach of liquid impregnation combined with reactive melt infiltration. The microstructure was studied and the ablation behavior exposed under oxyacetylene flame and high-frequency plasma wind tunnel atmosphere was assessed.Results show that many high melting point refractory compounds such as HfC,ZrC,TaC are introduced into the modified C /C composite, the density and open porosity of which are 3.83 g/cm3 and 4.71%,respectively.A compact oxide film generates upon the modified C /C composite after oxyacetylene flame ablated 360 s,which is mainly composed of HfO2 ,ZrO2 and Ta2 O5 .The linear ablation rate of modified C /C composite is 0.005 18 mm /s.The ablation resistance of modified C /C composite bulb model is assessed by high-frequency plasma wind tunnel,the heat flux is 3.53 MW/m2 ,the stagnation temperature is 2293 ℃,and the test duration is 180s.After ablation,a dense oxide protective layer forms on the surface of the model,the shape and the dimension of the model are changed insignificantly,and the linear ablation rate is 0.001 72 mm /s after removing the oxide layer.关键词
改性 C/C 复合材料/抗烧蚀/氧乙炔焰/高频等离子体风洞Key words
modified C/C composite/ablation resistance/oxyacetylene flame/high-frequency plasma wind tunnel分类
通用工业技术引用本文复制引用
张虹,白宏德,白书欣,叶益聪,朱利安..改性 C／C 复合材料快速制备与抗烧蚀性能考核[J].国防科技大学学报,2016,(1):20-25,6.基金项目
国家自然科学基金资助项目 （）
