Aligned carbon nanotube-reinforced silicon carbide composites produced by chemical vapor infiltration

被引：72
|
作者：
Gu, Zhanjun [1 ,2 ,6 ]
Yang, Yingchao [3 ]
Li, Kaiyuan [1 ,2 ,4 ]
Tao, Xinyong [3 ]
Eres, Gyula [5 ]
Howe, Jane Y. [5 ]
Zhang, Litong [4 ]
Li, Xiaodong [3 ]
Pan, Zhengwei [1 ,2 ]
机构：
[1] Univ Georgia, Fac Engn, Dept Phys & Astron, Athens, GA 30602 USA
[2] Univ Georgia, Nanosci & Engn Ctr, Athens, GA 30602 USA
[3] Univ S Carolina, Dept Mech Engn, Columbia, SC 29208 USA
[4] NW Polytech Univ, Natl Key Lab Thermostruct Composite Mat, Xian 710072, Shanxi, Peoples R China
[5] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA
[6] Chinese Acad Sci, Inst High Energy Phys, Lab Bioenvironm Effects Nanomat & Nanosafety, Beijing 100049, Peoples R China
来源：
CARBON | 2011年 / 49卷 / 07期
基金：
美国国家科学基金会;
关键词：
MATRIX COMPOSITES; ELECTRICAL-PROPERTIES; MATERIALS SCIENCE; STRENGTH; NANOCOMPOSITES; MECHANISMS; OXIDATION; CERAMICS; KINETICS; MODULUS;
D O I：
10.1016/j.carbon.2011.02.016
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：
A chemical vapor infiltration (CVI) technique was used to overcome most of the challenges involved in fabricating exceptionally-tough CNT/SiC composites. Nanotube pullout and sequential breaking and slippage of the walls of the CNTs during failure were consistently observed for all fractured CNT/SiC samples. These energy absorbing mechanisms result in the fracture strength of the CNT/SiC composites about an order of magnitude higher than the bulk SiC. The CVI-fabricated CNT/SiC composites have an strongly-bonded tube/matrix interface and an amorphous, crack-free SiC matrix, enabling the composites to withstand oxidization at 700-1600 degrees C in air. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2475 / 2482
页数：8
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