宇航材料工艺2018，Vol.48Issue(2)：25-28,4.DOI:10.12044/j.issn.1007-2330.2018.02.005
C/C-Cu复合材料的烧蚀形貌和烧蚀机理
Ablative Morphology and Mechanism in Different Regions of C/C-Cu Composites
摘要
Abstract
Using PAN-based pre-oxidized fiber integral felt as reinforcement,the porous C/C preforms were fabricated by carbonization and isothermal CVI,and then C/C-Cu composites were manufactured by gas pressure infiltration technique which introduced copper into the porosity of C/C preforms.The ablative properties of C/C-Cu composites were tested by H2-O2 ablation method.The micro-morphology and constitutions in different ablative regions were analyzed by SEM and EDS.The results indicate that the ablative performance of C/C-Cu composites with 0.96g/cm3density is excellent due to low linear and mass ablation rate.The ablative macro-morphology is composed of significant pit as central region in which the ablative mechanisms are oxidation of C/C preform and mechanical erosion of copper.Thermal oxidation and mechanical erosion of copper result in copper concentration in transition region,and black color surface in marginal region is due to oxidation of C/C preform.In order to improve the ablative performance of C/C-Cu,"pinning" effect of C/C preform should play an important role which can prevent copper from flowing by flame at high temperature.关键词
C/C-Cu/烧蚀/氧化/机械冲刷/钉扎效应Key words
C/C-Cu composites/Ablation/Oxidation/Mechanical erosion/Pinning effect分类
通用工业技术引用本文复制引用
孙乐,王成,宗彦旭,吴坤尧,丁旭..C/C-Cu复合材料的烧蚀形貌和烧蚀机理[J].宇航材料工艺,2018,48(2):25-28,4.基金项目
国家级大学生创新创业训练计划项目(201611736001) （201611736001）
