GNPs/Al nanocomposites with high strength and ductility and electrical conductivity fabricated by accumulative roll-compositing  

作　　者：Zi-Hao Chen Han-Yu Hui Cheng-Lin Li Feng Chen Xin-Ming Mei Ye Ma Ju-Ying Li Seong-Woo Choi Qing-Song Mei 

机构地区：[1]School of Power and Mechanical Engineering,Wuhan University,Wuhan 430072,China [2]School of Mechanical Engineering,Wuhan Polytechnic University,Wuhan 430023,China [3]Advanced Metals Division,Korea Institute of Materials Science,Changwon 51508,Republic of Korea

出　　处：《Rare Metals》2021年第9期2593-2601,共9页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.51371128);the Fundamental Research Funds for the Central Universities of China(No.2042017KF0190)。

摘　　要：Aluminum matrix composites(AMCs) reinforced with graphene nanoplatelets(GNPs) were fabricated by using an accumulative roll-compositing(ARC) process.Microstructure, mechanical and electrical properties of the nanostructured AMCs were characterized. The results showed that small addition(0.2 vol% and 0.5 vol%) of GNPs can lead to a simultaneous increase in the tensile strength and ductility of the GNPs/Al nanocomposites, as compared with the same processed pure Al. With increasing GNPs content, the tensile strength of the GNPs/Al nanocomposites can be enhanced to 387 MPa with retained elongation of 15%. Meanwhile, the GNPs/Al nanocomposites exhibited a good electrical conductivity of77.8%–86.1% that of annealed pure Al. The excellent properties(high strength, high ductility and high conductivity) of the GNPs/Al are associated with the particular ARC process, which facilitates the uniform dispersion of GNPs in the matrix and formation of ultrafine-grained Al matrix. The strengthening and toughening of the GNPs/Al nanocomposites were discussed considering different mechanisms and the unique effect of GNPs.

关 键 词：Aluminum matrix composites Graphene nanoplatelets Accumulative roll compositing Electrical conductivity Mechanical properties 

分 类 号：TB333[一般工业技术—材料科学与工程]