The effect of mechanical stress on electric resistance of nanographite-epoxy composites

被引：1
|
作者：
Vovchenko, L. [1 ]
Lazarenko, A. [1 ]
Matzui, L. [1 ]
Zhuravkov, A. [1 ]
机构：
[1] Kyiv Natl Taras Shevchenko Univ, Dept Phys, UA-01033 Kiev, Ukraine
来源：
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2012年 / 44卷 / 06期
关键词：
GRAPHITE; NANOCOMPOSITES;
D O I：
10.1016/j.physe.2010.12.017
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The in-plane electric resistance R of composite materials (CMs) thermoexfoliated graphite(TEG)-epoxy resin(ED) under compression along compacting C-axis has been investigated by four-probe method. TEG content was 5-75 wt%. It was shown that specimens prepared by cold pressing are denser and reveal lower values of electric resistivity in comparison with specimens prepared by pouring. It was found that compression of the specimens leads to plastic deformation of specimens (epsilon(pl)) and essential irreversible decrease of electric resistance during the first cycle of loading (up to 50 MPa), especially for the poured specimens with low density. Within the proposed model the contact resistance R-k between graphite particles in CM has been evaluated and it was shown that it increased with the decrease in TEG content in CM and depends on compacting method of CMs and the dispersity of graphite filler. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：940 / 943
页数：4
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