| 引用本文: | 周浩,张长瑞,曹英斌,等.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.[点击复制] |
| ZHOU Hao,ZHANG Changrui,CAO Yingbin,et al.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[点击复制] |
|
| |
|
|
| 本文已被：浏览 7655次 下载 5941次 |
| 树脂浸渍裂解对气相硅反应渗透C/SiC的影响 |
| 周浩, 张长瑞, 曹英斌, 周新贵 |
|
(国防科技大学 航天与材料工程学院，湖南 长沙 410073)
|
| 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。 |
| 关键词: 气相硅 酚醛树脂 碳毡 孔隙率 力学性能 |
| DOI： |
| 投稿日期：2006-02-16 |
| 基金项目:国家部委预研基金资助项目(41312011002) |
|
| Effects of Impregnation and Pyrolysis of Resin on the C/SiC Composites Fabricated by Reactive Infiltration of Gaseous Silicon |
| ZHOU Hao, ZHANG Changrui, CAO Yingbin, ZHOU Xingui |
|
(College of Aerospace and Materials Engineering, National Univ. of Defense Technology, Changsha 410073, China)
|
| 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. |
| Keywords: gaseous silicon phenolic resin carbon felt porosity mechanical properties |
|
|
