HfC改性C/C复合材料整体喉衬的烧蚀性能研究  

Ablation Performances of the HfC Modified Carbon/carbon Composite Integrated Throat

作　　者：李淑萍[1] 李克智[1] 郭领军[1] 和永岗[1] 

机构地区：[1]西北工业大学材料学院,西安710072

出　　处：《无机材料学报》2008年第6期1155-1158,共4页Journal of Inorganic Materials

基　　金：国家"973"资助项目(2006CB600908)

摘　　要：采用热梯度化学气相沉积工艺制备了碳化铪改性和未改性整体炭毡增强的炭/炭(C/C)复合材料整体喉衬,采用小型固体火箭发动机试车台装置(平均工作压强为7MPa)测定了它们的烧蚀性能.结合扫描电镜(SEM)和能谱(EDS)分析,讨论了碳化铪改性对C/C复合材料整体喉衬烧蚀行为的影响.结果表明:与未改性的C/C复合材料整体喉衬相比,碳化铪改性C/C复合材料整体喉衬的烧蚀过程中存在一个线烧蚀率恒定的稳定烧蚀阶段,且其线烧蚀率减小了34%,质量烧蚀率减小了13%.The carbon felt reinforced HfC-C/C and C/C composite integrated throats were prepared by thermal gradient chemical vapour infiltration process,and their ablation resistance was determined by using an equipment of solid rocket motor under the pressure of 7MPa.The effects of carbon hafnium on ablative properties of the integrated throat were investigated by scanning electron microscope（SEM） and energy dispersive spectroscope（EDS）.The results show that the ablation behavior of the HfC-C/C composite integrated throat has characteristic of a steady ablation stage with constant linear ablation rate.Compared with those measured for the C/C composite integrated throat,the linear and mass ablation rates of the HfC-C/C composite integrated throat are decreased by 34% and 13%,respectively.

关 键 词：C/C复合材料 固体火箭发动机 碳化铪 烧蚀特性 

分 类 号：TB332[一般工业技术—材料科学与工程]