采用高密度3D炭纤维预制体,以丙烯作为碳源,氮气作为载气,利用自制的快速CVI炉制备了板形C/C复合材料.详细分析了压差等工艺参数在CVI制备C/C复合材料过程中对"封孔"现象的影响,采用扫描电镜(SEM)和正交偏光显微镜(PLM)对各阶段C/C材料的微观形貌特征作了详细研究,分析了预制体在增密过程中密度的变化,初步探讨了"封孔"形成的机理.实验证明:采用多阶段CVI工艺可明显改善板形C/C材料封孔现象,初始密度为0.94g/cm3的高密度预制体经过250h的增密,C/C复合材料密度达到了1.82g/cm3.
参考文献
| [1] | 王秀飞,黄启忠,宁可焱,等.硅化处理对炭纤维石墨化度的影响.材料工程,2007(1):52-55. |
| [2] | Leea Seung-Chul,Jeong Seong-Taek,Park Jong-Nam,et al.A study on mechanical properties of carbon fiber reinforced plastics by three-point bending testing and transverse static response.Journal of Materials Processing Technology,2008,201(1/213):761-764. |
| [3] | Xu Guozhong,Li Hejun,Bai Ruicheng,et al.Influence of the ma-trix texture on the fracture behavior of 2D carbon/carbon compos-ites.Materials Science ＆ Engineering A,2008,478(1/2):319-323. |
| [4] | Park Jong Kyoo,Lee Jae Yeol,Won Yong Gu.Strengthening effect of the misaligned fibers on high-temperature mechanical properties of spun-yam type carbon composites.Composites Sci-ence and Technology,2008,68(2):551-556. |
| [5] | ZHANG Ming-Yu,WANG Li-Ping,HUANG Qi-Zhang,et al.Rapid chemical vapor infiltration of C/C composites.Transactions of Nonferrous Metals Society of China,2009,19(6):1436-1439 |
| [6] | Hu Yujie,Luo Ruiying,Zhang Yunfeng,et al.Effect of perform density on densification rate and mechanical properties of carbon/carbon composites.Materials Science and Engineering A,2010,527(3):797-801. |
| [7] | Guellali M,Oberacker R,Hoffmann M J.Influence of heat treat-ment on microstructure and mechanical properties of CVI-CFC composites with medium and highly textured pyrocarbon matrices.Composites Science and Technology,2008,68(2):1115-1121. |
| [8] | Guellah M,Oberacker R,Hoffmann M J.Influence of heat treat-ment on microstructure and mechanical properties of highly tex-tured pymcarbons deposited during CVD at about 1100℃ and above 2000℃.Composites Science and Technology,2008,68(5):1122-1130. |
| [9] | Zhao Jian-guo,Li Ke-zhi,Li He-jun,et al.The influence of ther-mal gradient on pyrocarbon deposition in carbon/carbon compos-ites during the CVI process.Carbon,2006,44(4):786-791. |
| [10] | 张伟刚.化学气相沉积-从烃类气体到固体碳.北京:科学出版社,2007:47-68 |
| [11] | Wu Xiaowen,Luo Ruiying,Ni Yongfeng,et al.Microstructure and mechanical properties of carbon foams and fibers reinforced carbon composites densified by CLVI and pitch impregnation.Composites Part A:Applied Science and Manufacturing,2009,40(2):225-231. |
| [12] | Li Jinsong,Luo Ruiying,Yan Ying.Densification kinetics and matrix microstructure of carbon fiber/carbon nanofiber/pyrocarbon composites prepared by electrophoresis and thermal gradient chemical vapor infiltration.Carbon,2011,49(1):242-248. |
| [13] | LU Cui-Ying,CHENG Lai-Fei,ZHANG Li-Tong,et al.Gas products and carbon deposition kinetics in chemical vapor deposi-tion from propylene.New Carbon Materials,2010,25(1):35-40. |
| [14] | Wu Xiaowen,Luo Ruiying,Zhang Jincao,et al.Deposition mechanism and microstructure of pyrocarbon prepared by chemi-cal vapor infiltration with kerosene as precursor.Carbon,2009,47(6):1429-1435. |
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