Fabricating thick-section carbon fiber/silicon carbide composites by machining-aided chemical vapor infiltration
Fabricating thick-section carbon fiber/silicon carbide composites by machining-aided chemical vapor infiltration
复制标题
通过机械加工辅助化学气相渗透制造厚截面碳纤维/碳化硅复合材料
DOI：
10.1016/j.ceramint.2017.07.025
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发表时间：
2017-11
影响因子：
5.2
通讯作者：
Zhao Hui
中科院分区：
文献类型：
--
作者：
Zhang Jiaxin;Cheng Laifei;Liu Yongsheng;Zhang Yi;Jiang Fengrui;Zhao Hui
化学气相渗透（CVI）是制备碳纤维/碳化硅（C/SiC）复合材料的重要工艺。然而，由于致密化的难度增加，用CVI制备蜂窝状结构或厚截面C/SiC复合材料/部件仍然是一个挑战。在这里，机械辅助CVI（MACVI）的设计，其中渗透辅助孔被利用（机加工），以增加基体沉积。为了验证该方法，厚截面（10 mm厚）C/SiC复合材料的MACVI制备。对制备的MACVIC/SiC复合材料及其CVI对应物进行了孔隙率分析和显微结构表征，显示密度增加了12.7%，孔隙率降低了32.1%。对所制备的MACVIC/SiC复合材料的力学性能进行了表征，其弯曲强度最多可提高1.72倍。此外，韧性也大大增加。MACVI工艺降低了气孔率，提高了强度和韧性，证明了MACVI工艺可有效地制备更高强度、更高韧性的多孔结构或厚截面陶瓷基复合材料/构件。
Chemical vapor infiltration (CVI) is a prominent process for fabricating carbon fiber/silicon carbide (C/SiC) composites. However, the preparation of enclosed-structure or thick-section C/SiC composites/components with CVI remains a challenge, since the difficulty of densification increases. Here, machining-aided CVI (MACVI) is designed, in which infiltration-assisting holes are utilized (machined) to increase matrix deposition. To validate the approach, thick-section (10 mm thick) C/SiC composites were fabricated by MACVI. Porosity analysis and microstructure characterization were performed on the fabricated MACVI C/SiC composites and their CVI counterparts, showing a density increase up to 12.7% and a porosity decrease up to 32.1%. The mechanical behavior of the fabricated MACVI C/SiC composites was characterized, showing an increase of flexural strength by a factor of 1.72 at most. Besides, the toughness also largely increases. Both the porosity decrease and the strength and toughness increase brought by MACVI demonstrate its effectiveness for fabricating stronger and tougher enclosed-structure or thick-section ceramic matrix composites/components.
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影响因子：
5.2
作者：
Jinshan Yang;S. Dong;Chengying Xu
通讯作者：
Jinshan Yang;S. Dong;Chengying Xu
影响因子：
3.9
作者：
C. Folsom;F. Zok;F. Lange
通讯作者：
C. Folsom;F. Zok;F. Lange
影响因子：
3.9
作者：
J. McNulty;F. Zok;G. Genin;A. Evans
通讯作者：
J. McNulty;F. Zok;G. Genin;A. Evans
影响因子：
56.9
作者：
J. Kinney;T. Breunig;T. Starr;D. Haupt;M. C. Nichols;S. Stock;M. D. Butts;R. Saroyan
通讯作者：
J. Kinney;T. Breunig;T. Starr;D. Haupt;M. C. Nichols;S. Stock;M. D. Butts;R. Saroyan
影响因子：
10.9
作者：
Yongdong Xu;Lai-fei Cheng;Litong Zhang
通讯作者：
Yongdong Xu;Lai-fei Cheng;Litong Zhang