Fabrication of aluminum matrix composites reinforced with Ni-coated graphene nanosheets

被引：75
作者：
Guan, R. [1 ,2 ]
Wang, Y. [2 ]
Zheng, S. [3 ]
Su, N. [2 ]
Ji, Z. [2 ]
Liu, Z. [2 ]
An, Y. [1 ]
Chen, B. [1 ]
机构：
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Ctr Adv Lubricat & Seal Mat, Xian 710072, Shaanxi, Peoples R China
[2] Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Liaoning, Peoples R China
[3] Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2019年 / 754卷
基金：
中国国家自然科学基金;
关键词：
Metal matrix composites; Graphene; Dispersion; Interface; Strengthening; Nickel; ENHANCED MECHANICAL-PROPERTIES; TENSILE PROPERTIES; CARBON NANOTUBES; ALLOY;
D O I：
10.1016/j.msea.2019.03.068
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Homogeneous graphene dispersion and suitable interface bonding are two key challenges to realize the high strengthening potential of graphene in metal matrix composites (MMCs). In this study, graphene nanosheets (GNSs) with deposited nickel (Ni) nanoparticles were synthesized to simultaneously overcome the two challenges. Ni-coated-GNS-reinforced aluminum (Al) MMCs were fabricated by graphene synthesis, Ni decoration and subsequent powder metallurgy. It was revealed that Ni-coated GNSs exhibited noticeably enhanced strengthening effect compared with graphene reinforcements in most previous studies. With the addition of 1.5 wt% Ni-coated GNSs, the composites exhibited 132% higher strength than that of unreinforced aluminum. The enhancement in Vickers hardness and Young's modulus further confirmed the remarkable strengthening effect. The high strength and high Young's modulus were examined by strengthening models, and a comparison between experimental and theoretical values was reached. The main strengthening mechanisms in the Ni-coated GNSs/AI composites were clarified as dislocation-related ones.
引用
收藏
页码：437 / 446
页数：10
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