C/C-Cu复合材料的烧蚀性能及烧蚀机理  

Ablation properties and ablation mechanism of C/C-Cu composites

作　　者：冉丽萍[1] 李文军[1] 杨琳[1] 易茂中[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《中国有色金属学报》2010年第3期510-515,共6页The Chinese Journal of Nonferrous Metals

基　　金：国家重点基础研究发展规划资助项目(2006CB600906);湖南省重点科技支撑计划资助项目(2007KG2017)

摘　　要：采用真空熔渗技术制备新型C/C-Cu复合材料。采用氧-乙炔焰测试不同时间下C/C-Cu复合材料的抗烧蚀性能,利用XRD、SEM分析材料烧蚀后的物相组成及组织形貌,对C/C-Cu复合材料的烧蚀机理进行研究。结果表明:烧蚀时间对材料的烧蚀率有显著影响,随着时间的延长,材料的质量烧蚀率和线烧蚀率均呈上升趋势;烧蚀后复合材料表面生成氧化物相TiO2和Cu2O,原来的TiC相被TiO2相替代;C/C-Cu复合材料的烧蚀性能优于C/C复合材料的烧蚀性能;C/C-Cu复合材料的氧-乙炔焰烧蚀机制为热氧化烧蚀、热物理烧蚀(升华)和机械冲刷的综合作用。Novel carbon/carbon-copper （C/C-Cu） composites were fabricated by molten infiltration.The ablation characteristics with different ablation times were evaluated under O2-C2H2 ablation conditions.The phase compositions and microstructures of the composites before and after ablation were examined by XRD and SEM.The ablation mechanisms of the composites were discussed.The results show that the ablation time has a great effect on the ablation characteristics.Both the mass ablation rate and linear ablation rate increase with prolonging ablation time.After ablation,the original TiC phase is substituted by TiO2,and Cu2O is formed on the ablation surface of the composites.The ablation properties of the composites are better than those of the carbon/carbon composites.The ablation mechanisms of the C/C-Cu composite under the O2-C2H2 condition are synergistic effect of thermo-oxidation,thermo-physics ablation （sublimation） and mechanical erosion.

关 键 词：C/C-CU复合材料 烧蚀 烧蚀机理 

分 类 号：TB331[一般工业技术—材料科学与工程]