Tribological performance of Graphene/Carbon nanotube hybrid reinforced Al2O3 composites.
Tribological performance of Graphene/Carbon nanotube hybrid reinforced Al2O3 composites.
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DOI：
10.1038/srep11579
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发表时间：
2015-06-23
影响因子：
4.6
通讯作者：
Zhu Y
中科院分区：
文献类型：
--
作者：
Yazdani B;Xu F;Ahmad I;Hou X;Xia Y;Zhu Y
采用球盘法研究了热压纯 Al2O3 及其含有不同含量石墨烯纳米片 (GNP) 和碳纳米管 (CNT) 的复合材料在不同负载条件下的摩擦学性能。与纯 Al2O3 相比，使用 0.5wt% GNP 增强的复合材料表现出摩擦系数降低了 23%，磨损率有望降低 70%，而由 0.3wt.% GNPs+1wt.% CNT 组成的混合增强材料表现出更好的性能，磨损率降低了 86%。使用拉曼光谱研究了磨损期间对增强相造成的损坏程度。根据力学性能、脆性指数和微观结构特征分析了复合材料的磨损机制。 GNP 和 CNT 之间的良好配合使得混合 GNT 增强复合材料具有优异的耐磨性能。 GNPs 在磨损表面通过剥落形成摩擦膜方面发挥了重要作用；而碳纳米管有助于提高断裂韧性并防止晶粒在摩擦学测试过程中被拉出。
Tribological performance of the hot-pressed pure Al2O3 and its composites containing various hybrid contents of graphene nanoplatelets (GNPs) and carbon nanotubes (CNTs) were investigated under different loading conditions using the ball-on-disc method. Benchmarked against the pure Al2O3, the composite reinforced with a 0.5 wt% GNP exhibited a 23% reduction in the friction coefficient along with a promising 70% wear rate reduction, and a hybrid reinforcement consisting of 0.3 wt.% GNPs + 1 wt.% CNTs resulted in even better performance, with a 86% reduction in the wear rate. The extent of damage to the reinforcement phases caused during wear was studied using Raman spectroscopy. The wear mechanisms for the composites were analysed based on the mechanical properties, brittleness index and microstructural characterizations. The excellent coordination between GNPs and CNTs contributed to the excellent wear resistance property in the hybrid GNT-reinforced composites. GNPs played the important role in the formation of a tribofilm on the worn surface by exfoliation; whereas CNTs contributed to the improvement in fracture toughness and prevented the grains from being pulled out during the tribological test.
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影响因子：
5
作者：
Lim, DS;You, DH;Jang, H
通讯作者：
Jang, H
影响因子：
4.6
作者：
Kim HJ;Lee SM;Oh YS;Yang YH;Lim YS;Yoon DH;Lee C;Kim JY;Ruoff RS
通讯作者：
Ruoff RS
DOI：
10.1016/j.jeurceramsoc.2009.09.032
发表时间：
2010-03-01
影响因子：
5.7
作者：
Ahmad, Iftikhar;Cao, Hongzhi;Zhu, Yan Qiu
通讯作者：
Zhu, Yan Qiu
DOI：
10.1111/j.1151-2916.1993.tb05304.x
发表时间：
1993-04-01
影响因子：
3.9
作者：
HANSSON, T;WARREN, R;WASEN, J
通讯作者：
WASEN, J
影响因子：
5
作者：
An, JW;You, DH;Lim, DS
通讯作者：
Lim, DS