Abstract：Graphene-reinforced aluminum matrix nanocomposites were successfully synthesized through ball milling and powder metallurgy. The tensile strength and yield strength of graphene-reinforced aluminum matrix nanocomposites are remarkably enhanced by adding graphene nanoflakes(GNFs). Importantly, the ductility properties are remained excellently, which is firstly found in the second phase reinforced metal matrix nanocomposites. The microstructures were observed by OM, SEM and TEM method. And the tensile properties were tested.The results show that graphene nanoflakes are effectively dispersed and well consolidate with aluminum matrix, however, chemical reactions are not observed. The original structured characteristics of graphene nanoflakes are preserved very well. The average tensile strength and yield strength of nanocomposite are 454MPa and 322MPa, respectively,which are 25% and 58% higher than the pristine aluminum alloy at a nanofiller mass fraction of 0.3%, while the ductility increases slightly. The relevant mechanisms of strengthening and toughening enhancement are discussed on the base of 2D and wrinkled structured properties of graphene nanoflakes.
燕绍九, 杨程, 洪起虎, 陈军洲, 刘大博, 戴圣龙. 石墨烯增强铝基纳米复合材料的研究[J]. 材料工程, 2014, 0(4): 1-6.
YAN Shao-jiu, YANG Cheng, HONG Qi-hu, CHEN Jun-zhou, LIU Da-bo, DAI Sheng-long. Research of Graphene-reinforced Aluminum Matrix Nanocomposites. Journal of Materials Engineering, 2014, 0(4): 1-6.
NOVOSELOV K S, GEIM A K, MOROZOV S V,et al. Electric field effect in atomically thin carbon films[J]. Science,2004,306(5695):666-669.
LEE C, WEI X D, KYSAR J W, et al. Measurement of the elastic properties and intrinsic strength of monolayer graphene[J]. Science,2008,321(5887):385-388.
万勇, 马廷灿, 冯端华, 等. 石墨烯国际发展态势分析[J].科学观察,2010,5(3):25-33.WAN Yong,MA Yan-can,FENG Duan-hua,et al. International development trends analysis of graphene science research[J]. Science Focus,2010,5(3):25-33.
RAFIEE M A, RAFIEE J, WANG Z, et al. Enhanced mechanical properties of nanocomposites at low graphene content[J]. ACS Nano,2009,3(12):3884-3890.
LIANG J J, HUANG Y, ZHANG L, et al. Molecular-level dispersion of graphene into poly(vinyl alcohol) and effective rein- forcement of their nanocomposites[J].Adv Funct Mater,2009,19(14):2297-2302.
LIU J, YAN H X, JIANG K. Mechanical properties of graphene platelet-reinforced alumina ceramic composites[J]. Cerm Int,2013,39(6):6215-6221.
SUN C, SONG M, WANG Z W, et al. Effect of particle size on the microstructures and mechanical properties of SiC-reinforced pure aluminum composites[J]. J Mater Eng Perform,2011,20(9):1606-1612.
SONG M, HE Y H, FANG S F. Yield stress of SiC reinforced aluminum alloy composites[J]. J Mater Sci,2010,45(15):4097-4110.
TOPCU I, GULSOY H O, KADIOGLU N, et al. Processing and mechanical properties of B4C reinforced Al matrix composites[J].J Alloys and Compd,2009,482(1-2):516-521.
PIERARD N, FONSECA A, COLOMER J F, et al. Ball milling effect on the structure of single-wall carbon nanotubes[J]. Carbon,2004,42:1691-1697.
HUMMERS W S, OFFEMAN R E. Preparation of graphitic oxide[J]. Journal of the American Chemical Society,1958,80(6):1339.
QIAN Y Q, VU A, SYMRL W, et al. Facile preparation and electrochemical properties of V2O5-graphene composite films as free-standing cathodes for rechargeable lithium batteries[J]. J Electrochem Soc,2012,159(8):1135-1140.
MIRACLE D B. Metal matrix composites-from science to technological significance[J]. Composite Science and Technology,2005,65(15-16):2526-2540.