C/C-SiC复合材料的制备及其烧蚀性能

doi:10.12066/j.issn.1007-2861.1905

上海大学学报(自然科学版) ›› 2017, Vol. 23 ›› Issue (6): 841-.doi: 10.12066/j.issn.1007-2861.1905

C/C-SiC复合材料的制备及其烧蚀性能

左亚卓, 李红, 耿真真, 王少雷, 杨敏, 任慕苏, 孙晋良

上海大学复合材料研究中心, 上海 200072

收稿日期:2017-02-27 出版日期:2017-12-30 发布日期:2017-12-30
通讯作者: 李红(1979—), 女, 副研究员, 博士, 研究方向为碳/碳复合材料. E-mail: lihong2007@shu.edu.cn
作者简介:李红(1979—), 女, 副研究员, 博士, 研究方向为碳/碳复合材料. E-mail: lihong2007@shu.edu.cn
基金资助:
国家重点研发计划政府间国际科技创新合作重点专项资助项目(2016YFE0111200)

Preparation and ablation properties of C/C-SiC composites

ZUO Yazhuo, LI Hong, GENG Zhenzhen, WANG Shaolei, YANG Min, REN Musu, SUN Jinliang

Research Center of Composite Materials, Shanghai University, Shanghai 200072, China

Received:2017-02-27 Online:2017-12-30 Published:2017-12-30

摘要/Abstract

摘要：

采用料浆喷涂法将SiC粉添加到针刺碳毡中, 利用化学气相渗透(chemical vapor infiltration, CVI)与前驱体浸渍裂解(precursor infiltration pyrolysis, PIP)复合工艺制备C/CSiC复合材料. 借助X射线衍射(X-ray diffraction, XRD)与扫描电子显微镜(scanning electron microscope, SEM)观察材料的微观结构, 利用H₂-O₂焰烧蚀实验测试材料的抗烧蚀性能, 分析其烧蚀行为. 结果表明: 烧蚀500 s后, SiC含量为9%的C/C-SiC复合材料的抗烧蚀性能显著优于C/C复合材料, 其线烧蚀率降低了63%, 质量烧蚀率降低了76%. 烧蚀中心区, 烧蚀最严重, 且材料的烧蚀主要是升华和机械剥蚀, 并伴有氧化. 烧蚀过渡区, 熔融SiO₂能够弥合材料的裂纹、孔隙等缺陷, 阻挡氧化性气氛进入材料内部, 使材料表现出优异的抗烧蚀性能. 材料的烧蚀主要是热氧化和H₂-O₂流的剪切剥蚀. 在烧蚀边缘区, 烧蚀轻微, 热氧化起主要作用.

关键词: C/C-SiC复合材料, H₂-O₂焰烧蚀, SiC粉, 料浆喷涂法

Abstract:

C/C-SiC composites were prepared by adding SiC powder to the carbon felt performed before chemical vapor infiltration (CVI) and precursor infiltration pyrolysis (PIP) using slurry spraying. The micro structure of composites was studied with XRD and SEM. Ablation performance of the composites was investigated using H₂-O₂ flame ablation equipment. The results show that C/C-SiC composites had better anti-ablative performances compared with C/C composite after ablation for 500 s when SiC content of C/C-SiC composite is 9%. Linear and mass ablation rates of (C-SiC)f/C composites decreased by 63% and 76% respectively. At the ablation center zone, ablation of composites is most serious. The ablation mechanism is dominated by sublimation and mechanic aerosion, accompanied
by oxidation. In the ablation transitional zone, molten SiO₂ could heal cracks and holes and other defects, and effectively prevent oxidizing atmosphere into the materials, making the materials exhibit excellent ablation. The main ablation mechanism was thermo-oxidation and H₂-O₂ flow shear erosion. In the ablation marginal zone, composites were ablated slightly. The main ablation mechanism was thermo-oxidation ablation.

Key words: C/C-SiC composites, H₂-O₂ flame ablation, SiC powder, slurry spraying

左亚卓, 李红, 耿真真, 王少雷, 杨敏, 任慕苏, 孙晋良. C/C-SiC复合材料的制备及其烧蚀性能[J]. 上海大学学报(自然科学版), 2017, 23(6): 841-.

ZUO Yazhuo, LI Hong, GENG Zhenzhen, WANG Shaolei, YANG Min, REN Musu, SUN Jinliang. Preparation and ablation properties of C/C-SiC composites[J]. Journal of Shanghai University（Natural Science Edition）, 2017, 23(6): 841-.

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C/C-SiC复合材料的制备及其烧蚀性能

Preparation and ablation properties of C/C-SiC composites

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