Effect of a diffusion-enhancing hole on the densification of a thick-section 2D C/SiC composite
Effect of a diffusion-enhancing hole on the densification of a thick-section 2D C/SiC composite
复制标题
扩散增强孔对厚截面 2D C/SiC 复合材料致密化的影响
DOI:
10.1016/j.jeurceramsoc.2019.07.043
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发表时间:
2019-12
影响因子:
5.7
通讯作者:
Zhang Litong
中科院分区:
文献类型:
--
作者:
Zhang Jiaxin;Liu Yongsheng;Cheng Laifei;Zhao Hui;Wang Jing;Zhang Yi;He Zongbei;Zhang Baoxi;Zhang Litong
Diffusion-enhancing holes (DEHs) have been used to mitigate the large density gradients that are formed in the thick-section ceramic matrix composites (CMCs) fabricated by chemical vapor infiltration (CVI). However, the densification characters of the thick-section CMCs with DEHs through vapor infiltration remain a concern. Here, the densifications of a10-mm-thick two dimensional (2D) C/SiC composite with or without DEHs are investigated by experiments and calculations. Results showed both the measured densities, the predicted final densities, and the density growth rates (DGRs) for the composite with DEHs (diameters of 2 or 4 mm) are higher than those of the counterpart without DEHs, due to the forming of dense rings (DRs) around DEHs and the increased infiltration in the large pores (diameter > 52 μm). In addition, the diffusion increase in infiltration with DEHs is attributed to the increase of Knudsen diffusion resulted from the reopening of the blocked/sealed pores by DEH-machining.
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影响因子:
5.2
作者:
Zhang Jiaxin;Cheng Laifei;Liu Yongsheng;Zhang Yi;Jiang Fengrui;Zhao Hui
通讯作者:
Zhao Hui
影响因子:
5.7
作者:
S. Jacques;A. Guette;F. Langlais;R. Naslain;S. Goujard
通讯作者:
S. Jacques;A. Guette;F. Langlais;R. Naslain;S. Goujard
影响因子:
31
作者:
I. Golecki
通讯作者:
I. Golecki
影响因子:
10.9
作者:
Mei, Hui;Bai, Qianglai;Cheng, Laifei
通讯作者:
Cheng, Laifei
影响因子:
9.1
作者:
Lamouroux, F;Bertrand, S;Cataldi, M
通讯作者:
Cataldi, M