Simultaneous strengthening and toughening of reduced graphene oxide/alumina composites fabricated by molecular-level mixing process

被引:127
作者
Lee, Bin [1 ]
Koo, Min Young [1 ]
Jin, Sung Hwan [1 ]
Kim, Kyung Tae [2 ]
Hong, Soon H. [1 ]
机构
[1] Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, Taejon 305701, South Korea
[2] Korea Inst Mat Sci, Powder & Ceram Mat Div, Changwon Si 642831, Gyeongnam, South Korea
基金
新加坡国家研究基金会;
关键词
ENHANCED MECHANICAL-PROPERTIES; IMPROVED GAS BARRIER; FRACTURE-TOUGHNESS; CARBON NANOTUBES; NANOCOMPOSITES; SHEETS; OXIDE;
D O I
10.1016/j.carbon.2014.06.074
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
Reduced graphene oxide/alumina composite powders were prepared by mixing of graphene oxides and aluminum ions at the molecular-level. It was found that the composite consolidated from the powders showed that reduced graphene oxide were homogeneously dispersed and strongly bonded with the alumina matrix by oxygen atoms presenting at reduced graphene oxide/alumina interfaces. Both the hardness and the toughness of the composites were enhanced simultaneously by the addition of reduced graphene oxide, which act as bridges to restrain the propagation of cracks in the alumina matrix. It is clarified that graphenes can be utilized as promising reinforcements for enhancement in mechanical properties of ceramic materials when the molecular-level mixing process is applied. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码:212 / 219
页数:8
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