Open AccessAtomistic simulation of the nanoindentation behavior of graphene/Al multilayered nanocomposites
Author(s) -
Jiaqi Zhu,
Xia Liu,
Qian Yang
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/531/1/012055
Subject(s) - graphene , nanoindentation , materials science , monocrystalline silicon , composite material , nanocomposite , composite number , deformation mechanism , deformation (meteorology) , aluminium , coating , slip (aerodynamics) , molecular dynamics , nanotechnology , metallurgy , silicon , microstructure , physics , computational chemistry , chemistry , thermodynamics
In this paper, the mechanical behaviour of graphene/aluminum multilayered nanocomposites (GAMC) was studied by conducting the nanoindentation simulations using molecular dynamics (MD) method. The reinforcement effect of graphene on aluminum was investigated by two different cases: the graphene layers are considered as the reinforcement and the coating materials respectively. The microscopic deformation mechanism is investigated through the study of a hemispherical diamond indenter indenting against the monocrystalline Al and GAMC. For the graphene-coated Al composite (GCA), it is found that graphene coating layers have an effect on the characteristics of dislocation slip in Al matrix and improve the load carrying capacity of the GCA significantly. In addition, graphene-reinforced Al composite (GRA) with different spacing-distance of the graphene layers was investigated. It is concluded that the GRA shows an increasing nanoindentation properties with reducing the thickness of Al layers. Although the present research is based on monocrystalline aluminum, the deformation mechanism here can be applied to other face-centered-cubic (FCC) monocrystalline metals structures.