Modification of Oxidation Resistance for Low Density Carbon-bonded Carbon Fiber (CBCF) Composite

被引:6
作者
Shi Jian-Jun [1 ]
Zhang Zong-Bo [2 ]
Feng Zhi-Hai [1 ]
Zhang Da-Hai [1 ]
Wang Yun [1 ]
Xu Cai-Hong [2 ]
机构
[1] Aerosp Res Inst Mat & Proc Technol, Sci & Technol Adv Funct Composites Lab, Beijing 100076, Peoples R China
[2] Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China
基金
中国国家自然科学基金;
关键词
perhydropolysilazane; carbon-bonded carbon fiber (CBCF); precursor infiltration thermal conversion (PIT); SiON coating; oxidation resistance; MECHANICAL-PROPERTIES; PROTECTIVE-COATINGS; COMPRESSION; EROSION;
D O I
10.15541/jim20170445
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
Perhydropolysilazane (PHPS) derived SiON coatings were deposited on surface of chopped carbon fiber in carbon-bonded carbon fiber (CBCF) composite by precursor infiltration-thermal (PIT) conversion method. Morphology and elemental analysis of SiON coating were investigated by SEM and EDS. The results show that the coatings are uniform, dense and mainly composed of Si, O and N elements. Meanwhile, the coating gets thicker with the increasing concentration of PHPS, but tends to agglomerate in the opening pores, especially when the concentration of PHPS reaches 10wt% and 20wt%, obvious agglomeration emerges in the opening pores. Meanwhile, cracks appear in the coating on the carbon fibre surface. Finally, oxidation resistance of CBCF composites treated by SiON coating was studied by TGA analysis and isothermal oxidation assessment. The results show that SiON coatings deposited on the carbon fiber surface in CBCF composite can remarkably enhance the oxidation resistance of CBCF, and the oxidation resistance increases with the increasing concentration of PHPS.
引用
收藏
页码:728 / 734
页数:7
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