材料工程2025，Vol.53Issue(6)：227-234,8.DOI:10.11868/j.issn.1001-4381.2024.000311
Hf/Zr比例对C/C-HfxZr1-xC复合材料耐烧蚀性能的影响
Effect of Hf/Zr ratios on ablation resistance of C/C-HfxZr1-xC composite materials
摘要
Abstract
Carbon/carbon(C/C)composites are prone to oxidation above 370℃,which restricts their further utilization in aerospace and military applications.Hence,enhancing the ablation resistance of C/C composites holds paramount significance.This research utilized citric acid,ethylene glycol,and metal salt solutions as precursors to fabricate C/C-HfxZr1-xC composite materials with a density ranging from 2.00 g/cm3 to 2.10 g/cm3 employing the precursor impregnation and pyrolysis(PIP)and ceramicization.The effect of different Hf/Zr ratios on the ablation resistance of C/C-HfxZr1-xC composites is investigated.The results indicate that HfxZr1-xC manifests as a solid solution ceramic.With the increase in Hf proportion,the ablation rate of C/C-HfxZr1-xC composites first decreases and then increases.Among them,C/C-Hf0.5Zr0.5C shows superior ablation resistance.When ablated for 120 s at a heat flux density of 3.5 MW/m2,the mass ablation rate and linear ablation rate of C/C-Hf0.5Zr0.5C are 1.39×10-2 g/s and 7.49×10-3 mm/s,respectively.This superiority can be attributed to the strong adhesion of the oxidation product HfO2-ZrO2 to the fiber and matrix in C/C-Hf0.5Zr0.5C,thereby mitigating mechanical erosion on the fiber and matrix.Simultaneously,the lower melting point of the HfO2-ZrO2 mixture facilitates the formation of a molten mixture of HfO2-ZrO2,consequently reducing the oxygen permeability of the oxide layer.关键词
C/C-HfxZr1-xC复合材料/PIP/耐烧蚀性能/固溶体Key words
C/C-HfxZr1-xC composite material/PIP/ablation resistance performance/solid solution分类
通用工业技术引用本文复制引用
赵旭宁,李红,易黎明,李梅,杨敏,姚彧敏,任慕苏,孙晋良..Hf/Zr比例对C/C-HfxZr1-xC复合材料耐烧蚀性能的影响[J].材料工程,2025,53(6):227-234,8.基金项目
上海市教育发展基金会和上海市教育委员会"曙光计划"项目(18SG34) （18SG34）
