| 摘要: |
| 针对针刺结构燃烧室在极端环境下安全裕度较低，难以满足超燃冲压发动机燃烧室热构件越来越苛
刻的工作环境需求的问题，缝合技术能够在有效地提高复合材料层间性能的同时，使制备的C/C-SiC-ZrC仍具
有优异的抗烧蚀性能。因此，本文选用缝合预制体经“CVI+PIP”组合工艺制备了缝合C/C-SiC-ZrC复合材料。
通过扫描电子显微镜（SEM）观察复合材料烧蚀前后试样表面形貌，借助能谱仪（EDS）和D8 Advance型X射
线衍射仪分析缝合C/C-SiC-ZrC复合材料烧蚀后试样表面的元素和物相组成。研究发现，在高温氧化环境中ZrC
和SiC二者能够在材料表面形成粘稠的ZrO2-SiO2玻璃态氧化膜，对材料基体和纤维形成保护作用。氧-乙炔烧
蚀结果显示，缝合C/C-SiC-ZrC复合材料平均质量烧蚀率为1.41×10-3 g/s、平均线烧蚀率为4×10-3 mm/s，具备优
异的抗烧蚀特性 |
| 关键词: 缝合 C/C-SiC-ZrC 烧蚀性能 |
| 基金项目: |
|
| Preparation and Ablative Resistance of Stitched C/C-SiC-ZrC Composites |
|
Li Jie1,2,3 Guo Xiaobo1,2,3 Yan Liansheng1,2,3 Luo Longfei1,2,3 Zheng Rui1,2,3 Sun Xiangyu1,2,31,2,3
|
|
1. Xi’an Aerospace Composite Material Institute, Xi’an 710025;2. Shanxi Key Laboratory of Aerospace Composites,
Xi’an 710025;3. National and Local Union Engineering Research Center of High-performance Carbon Fiber
Manufacture and Application, Xi’an 710089
|
| Abstract: |
| In view of the fact that the safety margin of the combustion chamber with needle-punched structure is
low in extreme environments, and it is difficult to meet the increasingly demanding working environment requirements
of the thermal components of the combustion chamber of scramjet engines, the stitching technology can effectively
improve the interlayer performance of composite materials, and the prepared C/C-SiC-ZrC has excellent anti-ablation
performance. Therefore, in this paper the stitched C/C-SiC-ZrC composites was prepared by “CVI+PIP” combined
process. For the samples of stitched C/C-SiC-ZrC before and after ablation, the scanning electron microscope (SEM)
was used to observe the surface morphology of samples, the energy dispersive spectrometer (EDS) was used to
characterize the distribution of elements on the surface of samples, and the D8 Advance type X-ray diffractometer was
used to analyze the phase composition of samples. It is found that ZrC and SiC can form viscous ZrO2-SiO2 glass
oxidation film on the surface of the material under high temperature oxidation environment, which can protect the
matrix and fiber from ablation. The composite shows excellent ablative properties under oxygen-acetylene ablative
conditions, with mass ablation rate of 1.41×10-3 g/s and linear ablation rate of 4×10-3 mm/s, respectively. |
| Key words: stitching C/C-SiC-ZrC ablation performance |
