Micro-mechanical properties and morphological observation on fracture surfaces of carbon nanotube composites pre-treated at different temperatures

被引:68
作者
Lau, KT [1 ]
Shi, SQ
Cheng, HM
机构
[1] Hong Kong Polytech Univ, Dept Mech Engn, Hong Kong, Hong Kong, Peoples R China
[2] Chinese Acad Sci, Inst Met Res, Shenyang, Peoples R China
关键词
nanostructures; multi-walled carbon nanotubes;
D O I
10.1016/S0266-3538(03)00038-1
中图分类号
TB33 [复合材料];
学科分类号
摘要
In an early stage of the decade, most of works on carbon nanotubes were centred on chemistry and physics. Due to extraordinary mechanical and thermal properties, these nanotubes have been used as nano-fibres for the improvement of the global mechanical properties of advanced composite structures. This paper reports the micro-hardness and flexural properties of nanotube/epoxy composites with different amounts of nanotubes content. Experimental measurements and microscopic observations of the composites pre-treated at different temperatures are discussed in detail. The results show that the hardness of the nanotube composites varied with different nanotube weight fractions. The flexural strength decreased by 10% for a composite beam with 2 wt.% of nanotubes. The fracture surfaces of nanotube composite were perpendicular to the nanotube pre-treated at 70 degreesC, and parallel to nanotubes pre-treated at -180 degreesC. The SEM images also revealed that all nanotubes were completely pulled out after the flexural strength test due to a weak-bonding strength between the nanotube and matrix. (C) 2003 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:1161 / 1164
页数:4
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