| 树脂浸渍裂解对气相硅反应渗透C/SiC的影响 |
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| 引用本文： | 周浩,张长瑞,曹英斌,周新贵.树脂浸渍裂解对气相硅反应渗透C/SiC的影响[J].国防科技大学学报,2006,28(3):33-36. |
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| 作者姓名： | 周浩 张长瑞 曹英斌 周新贵 |
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| 作者单位： | 国防科技大学,航天与材料工程学院,湖南,长沙,410073 |
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| 摘 要： | 粘胶基碳纤维毡经过CVD工艺进行沉积碳增密处理后,采用酚醛树脂浸渍—裂解对C/C素坯的密度进行调节,通过气相硅渗透反应工艺制备了C/SiC复合材料。研究了树脂浸渍—裂解对C/C素坯密度和气孔率的影响规律,分析了树脂裂解碳对C/SiC显微形貌和力学性能的影响。结果表明:随着树脂浸渍—裂解循环次数的增加,素坯密度增加,孔隙率降低;裂解碳含量为27wt%时,C/SiC复合材料的强度和模量达到最大,分别为231MPa和209GPa。通过控制裂解碳含量,可以实现对C/SiC复合材料力学性能和微观结构的裁剪。
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| 关 键 词： | 气相硅 酚醛树脂 碳毡 孔隙率 力学性能 |
| 文章编号： | 1001-2486(2006)03-0033-04 |
| 收稿时间： | 2006/2/16 0:00:00 |
| 修稿时间： | 2006年2月16日 |
Effects of Impregnation and Pyrolysis of Resin on the C/SiC Composites Fabricated by Reactive Infiltration of Gaseous Silicon |
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| ZHOU Hao,ZHANG Changrui,CAO Yingbin and ZHOU Xingui.Effects of Impregnation and Pyrolysis of Resin on the C/SiC Composites Fabricated by Reactive Infiltration of Gaseous Silicon[J].Journal of National University of Defense Technology,2006,28(3):33-36. |
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| Authors: | ZHOU Hao ZHANG Changrui CAO Yingbin and ZHOU Xingui |
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| Institution: | College of Aerospace and Materials Engineering, National Univ. of Defense Technology, Changsha 410073, China;College of Aerospace and Materials Engineering, National Univ. of Defense Technology, Changsha 410073, China;College of Aerospace and Materials Engineering, National Univ. of Defense Technology, Changsha 410073, China;College of Aerospace and Materials Engineering, National Univ. of Defense Technology, Changsha 410073, China |
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| Abstract: | C/SiC composites were manufactured by the process of reactive infiltration of gaseous silicon with carbon felt reinforced carbon green,which is made from viscose rayon-based carbon felt perform treated with CVD carbon and phenolic resin pyrolysis carbon.Effects of re-impregnation and pyrolysis cycles of resin on the density and porosities of green and the micrograph and mechanical properties of C/SiC were studied.The result indicates that with the increase of re-impregnation cycles and the density of green,the porosities of green declines.The bending strength and modulus of C/SiC reach the maximal figures,respectively 231MPa and 209GPa when the pyrolysis carbon content of preform is set to 27wt%.The mechanical and microstructure properties of C/SiC can be tailored by controlling the pyrolysis carbon volume in the green. |
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| Keywords: | gaseous silicon phenolic resin carbon felt porosity mechanical properties |
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