Preparation and anti-oxidation behavior of Si-C-B self-healing coating on C/SiC composite

被引:5
作者
Zhang Wei-Hua [1 ]
Cheng Lai-Fei [1 ]
Zhang Li-Tong [1 ]
Yang Wen-Bin [1 ]
Liu Yong-Sheng [1 ]
Xu Yong-Dong [1 ]
机构
[1] NW Polytech Univ, Natl Key Lab Thermostruct Composites Mat, Xian 710072, Peoples R China
关键词
chemical vapor deposition(CVD); B; BCx; self-healing coating; oxidation behavior;
D O I
10.3724/SP.J.1077.2008.00774
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Modification of Sic coating was carried out with B and BCx prepared by chemical vapor deposition(CVD), SiC/B/SiC and SiC/BCx/SiC multi-layer self-healing coatings were prepared on a two-dimensional C/SiC composite. The surface and cross section morphologies of the multi-layer coatings were analyzed by SEM. Oxidation were carried out in static air at 700 degrees C. The results show that the B2O3 glass produced by oxidation of B or BCx can seal the cracks existed in the coating well, the kinetics of oxidation is controlled by diffusion of oxygen through the micro-cracks and B2O3 glass layer; SiC/BCx/SiC-C/SiC composites have lower weight loss during the oxidation and higher strength retention after oxidized for 10h.
引用
收藏
页码:774 / 778
页数:5
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