Tensile mechanical characteristics and deformation mechanism of metal-graphene nanolayered composites

Rezaei, Reza

doi:10.1016/j.commatsci.2018.05.004

Cited by 46 publications

(15 citation statements)

References 27 publications

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“…Layered metal/carbon composites were also widely studied. In [ 18 ], it was shown that a decrease in metal layer thickness in layered graphene/FCC metal composites results in strengthening of the material. The presence of graphene layers also determines the deformation mechanisms of the composite.…”

Section: Introductionmentioning

confidence: 99%

Effect of Nanoparticle Size on the Mechanical Strength of Ni–Graphene Composites

et al. 2021

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The effect of the size of nickel nanoparticles on the fabrication of a Ni–graphene composite by hydrostatic pressure at 0 K followed by annealing at 1000 and 2000 K is studied by molecular dynamics simulation. Crumpled graphene, consisting of crumpled graphene flakes interconnected by van der Waals forces is chosen as the matrix for the composite and filled with nickel nanoparticles composed of 21 and 47 atoms. It is found that the main factors that affect composite fabrication are nanoparticle size, the orientation of the structural units, and temperature of the fabrication process. The best stress–strain behavior is achieved for the Ni/graphene composite with Ni47 nanoparticle after annealing at 2000 K. However, all of the composites obtained had strength property anisotropy due to the inhomogeneous distribution of pores in the material volume.

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Section: Introductionmentioning

confidence: 99%

Effect of Nanoparticle Size on the Mechanical Strength of Ni–Graphene Composites

et al. 2021

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“…Since then, a series of studies on three-dimensional nanolaminated graphene-metal composites have been carried out. Several studies revealed that the graphene interface provides a barrier to impede the propagation of dislocations, and simultaneously enhances the mechanical properties of the composites [22][23][24][25]. The competition between interface and matrix in deformation and failure of a nanolayered polycrystalline Cu-graphene material has been reported [26].…”

Section: Introductionmentioning

confidence: 99%

Effects of temperature and repeat layer spacing on mechanical properties of graphene/polycrystalline copper nanolaminated composites under shear loading

Huang¹,

Chang²,

Fang³

2021

Beilstein J. Nanotechnol.

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In the present study, the characteristics of graphene/polycrystalline copper nanolaminated (GPCuNL) composites under shear loading are investigated by molecular dynamics simulations. The effects of different temperatures, graphene chirality, repeat layer spacing, and grain size on the mechanical properties, such as failure mechanism, dislocation, and shear modulus, are observed. The results indicate that as the temperature increases, the content of Shockley dislocations will increase and the maximum shear stress of the zigzag and armchair directions also decreases. The mechanical strength of the zigzag direction is more dependent on the temperature than that of the armchair direction. Moreover, self-healing occurs in the armchair direction, which causes the shear stress to increase after failure. Furthermore, the maximum shear stress and the shear strength of the composites decrease with an increase of the repeat layer spacing. Also, the shear modulus increases by increasing the grain size of copper.

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“…In related studies, Kim et al [ 8 ] revealed the strength effect associated with single-atomic layer graphene in graphene/metal nanocomposites, and Boostani et al [ 9 ] combined graphene with aluminum (Al) to achieve high tensile strength and ductility. Additionally, Tang et al [ 10 ] improved the mechanical properties of graphene/copper (Cu) composites by using graphene and nickel (Ni) composites, and Rezaei [ 11 ] identified deformation mechanisms in graphene/metal nanolayered composites by determining their tensile mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

The Strength and Delamination of Graphene/Cu Composites with Different Cu Thicknesses

2021

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This study analyzed the mechanical and fracture behavior of graphene/copper (Cu) composites with different Cu thicknesses by using molecular dynamics (MD) and representative volume element (RVE) analysis. Three graphene/Cu composite analytical models were classified as 4.8, 9.8, and 14.3 nm according to Cu thicknesses. Using MD analysis, zigzag-, armchair-, and z (thickness)-direction tensile analyses were performed for each model to analyze the effect of Cu thickness variation on graphene/Cu composite strength and delamination fracture. In the RVE analysis, the mechanical characteristics of the interface between graphene and Cu were evaluated by setting the volume fraction to 1.39, 2.04, and 4.16% of the graphene/Cu composite model, classified according to the Cu thickness. From their obtained results, whether the graphene bond is maintained has the greatest effect on the strength of graphene/Cu composites, regardless of the Cu thickness. Additionally, graphene/Cu composites are more vulnerable to armchair direction tensile forces with fracture strengths of 14.7, 8.9, and 8.2 GPa depending on the Cu thickness. The results of this study will contribute to the development of guidelines and performance evaluation standards for graphene/Cu composites.

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Tensile mechanical characteristics and deformation mechanism of metal-graphene nanolayered composites

Cited by 46 publications

References 27 publications

Effect of Nanoparticle Size on the Mechanical Strength of Ni–Graphene Composites

Effect of Nanoparticle Size on the Mechanical Strength of Ni–Graphene Composites

Effects of temperature and repeat layer spacing on mechanical properties of graphene/polycrystalline copper nanolaminated composites under shear loading

The Strength and Delamination of Graphene/Cu Composites with Different Cu Thicknesses

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