Oxidation protection of C/C composites with a multilayer coating of SiC and Si plus SiC plus SiC nanowires

被引：114

作者：

Chu Yanhui ^{[1
]}

Li Hejun ^{[1
]}

Fu Qiangang ^{[1
]}

Wang Haipeng ^{[2
]}

Hou Xianghui ^{[3
]}

Zou Xu ^{[1
]}

Shang Gunan ^{[1
]}

机构：

[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Carbon Carbon Composites Res Ctr, Xian 710072, Peoples R China

[2] Northwestern Polytech Univ, Shaanxi Key Lab Space Mat Sci & Technol, Xian 710072, Peoples R China

[3] Univ Nottingham, Fac Engn, Energy & Sustainabil Res Div, Nottingham NG7 2RD, England

来源：

CARBON | 2012年 / 50卷 / 03期

基金：

中国国家自然科学基金;

关键词：

CARBON/CARBON COMPOSITES; ROOM-TEMPERATURE; MICROSTRUCTURE; MECHANISM;

D O I：

10.1016/j.carbon.2011.10.048

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

An oxidation protective Si-SiC coating with randomly oriented SiC nanowires was prepared on the SiC-coated carbon/carbon (C/C) composites by a two-step technique. First, a porous network of SiC nanowires was produced using chemical vapor deposition. This material was subjected to pack cementation to infiltrate the porous layer with a mixture of Si and SiC. The nanowires in the coating could efficiently suppress the cracking of the coating by various toughening mechanisms including nanowire pullout, nanowire bridging, microcrack deflection and good interaction between nanowire/matrix interface. The results of thermogravimetric analysis and thermal shock showed that the coating had excellent oxidation protection for C/C composites between room temperature and 1500 degrees C. These results were confirmed by two additional oxidation experiments conducted at temperature of 900 and 1400 degrees C, which demonstrated that the coating could efficiently protect C/C composites from oxidation at 900 degrees C for more than 313 h or at 1400 degrees C for more than 112 h. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：1280 / 1288

页数：9

共 19 条

[1] Carbon nanotube toughened aluminium oxide nanocomposite [J].