| 3DC/SiC复合材料在燃气中的氧化行为 |
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| 引用本文： | 殷小玮,成来飞,张立同,高蓉.3DC/SiC复合材料在燃气中的氧化行为[J].兵器材料科学与工程,2000,23(5):3-7. |
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| 作者姓名： | 殷小玮 成来飞 张立同 高蓉 |
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| 作者单位： | 西北工业大学凝固技术国家重点实验室 |
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| 摘 要： | 研究了 3DC/SiC复合材料在高温燃气环境中氧化 9h后的力学性能 ,重点研究了燃气中不同温度对C/SiC复合材料力学性能的影响。将长条形C/SiC试样置于发动机喷管出口处的燃气火焰中进行氧化 ,距离燃气中心较近区域的温度高达 12 5 0℃ ,而火焰边缘的温度在 80 0～ 10 0 0℃范围内。氧化 9h后 ,在火焰边缘的C/SiC试样的抗弯强度和断裂功大幅度降低 ;而靠近火焰中心的部分表现出较高的力学性能。C/SiC复合材料在燃气火焰不同区域中的不同力学性能是同氧化温度对SiC基体微裂纹的影响导致的。
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| 关 键 词： | 碳纤维 碳化硅 复合材料 化学气相沉积 氧化 |
| 文章编号： | 1004-244X(2000)05-0003-05 |
| 修稿时间： | 1999年7月23日 |
OXIDATION BEHAVIOR OF 3D C/SiC COMPOSITES IN COMBUSTION ENVIRONMENT |
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| Yin Xiaowei,Cheng Laifei,Zhang Litong,Gao Rong.OXIDATION BEHAVIOR OF 3D C/SiC COMPOSITES IN COMBUSTION ENVIRONMENT[J].Ordnance Material Science and Engineering,2000,23(5):3-7. |
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| Authors: | Yin Xiaowei Cheng Laifei Zhang Litong Gao Rong |
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| Abstract: | The oxidation behavior of a SiC-sealed 3D C/SiC composite was investigated ofter being oxidized for 9h in the high-velocity flame of a burner rig. The emphasis was the influence of different temperature in the different areas of the burner-rig flame on the mechanical properties of C/SiC composites. The flexure strength and fracture work of the C/SiC bar in the flame edge where the flame temperature was in the range of 800～1000℃degraded greatly. However,the C/SiC bar near the flame center, where the temperature was as high as 1250℃, showed higher mechanical properties. The difference between the mechanical properties of C/SiC in the different areas of the flame resulted from the influence of oxidation temperture on the width of the microcrack in SiC matrix. |
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| Keywords: | carbon fiber silicon carbide composite chemical vapour deposition Oxidation |
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