Enhancement of the mechanical properties of graphene–copper composites with graphene–nickel hybrids

Tang, Yanxia; Yang, Xiaojing; Wang, Rongrong; Li, Maoxin

doi:10.1016/j.msea.2014.01.061

Cited by 259 publications

(101 citation statements)

References 46 publications

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“…This is due to the oxidation of Cu to Cu 2 O. XRD analysis also indicated that there is no carbide formation in the composites. The binary phase diagram of the Cu-C system in Figure 10(c) also shows the absence of any compounds between Cu and C [31]- [33].…”

Section: S N Alam Et Almentioning

confidence: 89%

Development of Cu-Exfoliated Graphite Nanoplatelets (xGnP) Metal Matrix Composite by Powder Metallurgy Route

Alam¹,

Kumar²,

Sharma³

2015

Graphene

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In the present investigation the possibility of using exfoliated graphite nanoplatelets (xGnP) as reinforcement in order to enhance the mechanical properties of Cu-based metal matrix composites is explored. Cu-based metal matrix composites reinforced with different amounts of xGnP were fabricated by powder metallurgy route. The microstructure, sliding wear behaviour and mechanical properties of the Cu-xGnP composites were investigated. xGnP has been synthesized from the graphite intercalation compounds (GIC) through rapid evaporation of the intercalant at an elevated temperature. The thermally exfoliated graphite was later sonicated for a period of 5 h in acetone in order to achieve further exfoliation. The xGnP synthesized was characterized using SEM, HRTEM, X-ray diffraction, Raman spectroscopy and Fourier transform infrared spectroscopy. The Cu and xGnP powder mixtures were consolidated under a load of 565 MPa followed by sintering at 850˚C for 2 h in inert atmosphere. Cu-1, 2, 3 and 5 wt% xGnP composites were developed. Results of the wear test show that there is a significant improvement in the wear resistance of the composites up to addition of 2 wt% of xGnP. Hardness, tensile strength and strain at failure of the various Cu-xGnP composites also show improvement upto the addition of 2 wt% xGnP beyond which there is a decrease in these properties. The density of the composites decreases with the addition of higher wt% of xGnP although addition of higher wt% of xGnP leads to higher sinterability and densification of the composites, resulting in higher relative density values. The nature of fracture in the pure Cu as well as the various Cu-xGnP composites was found to be ductile. Nanoplatelets of graphite were found firmly embedded in the Cu matrix in case of Cu-xGnP composites containing low wt% of xGnP.

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Section: S N Alam Et Almentioning

confidence: 89%

Development of Cu-Exfoliated Graphite Nanoplatelets (xGnP) Metal Matrix Composite by Powder Metallurgy Route

Alam¹,

Kumar²,

Sharma³

2015

Graphene

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show abstract

“…Kim et al synthesized a metal-graphene nanolayered composite and found that the addition of GNS resulted in an ultra-high strength of 4.0 GPa for a graphene/nickel composite [14]. Moreover, the elastic modulus and yield strength of a copper matrix composite reinforced with GNS and Ni nanoparticle hybrids increased 61% and 94%, respectively, compared with the pure matrix, for a GNS content of only 1.0 vol % [15]. As a 2D layered material, graphene shows highly anisotropic behavior, which greatly affects the mechanical properties of graphene-based composites.…”

Section: Introductionmentioning

confidence: 99%

Interaction of Edge Dislocations with Graphene Nanosheets in Graphene/Fe Composites

et al. 2018

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Abstract:Graphene is an ideal reinforcement material for metal-matrix composites owing to its exceptional mechanical properties. However, as a 2D layered material, graphene shows highly anisotropic behavior, which greatly affects the mechanical properties of graphene-based composites. In this study, the interaction between an edge dislocation (b = 1/2 (111)) and a pair of graphene nanosheets (GNSs) in GNS reinforced iron matrix composite (GNS/Fe) was investigated using molecular dynamic simulations under simple shearing conditions. We studied the cases wherein the GNS pair was parallel to the (110), (112), and (111) planes, respectively. The results showed that the GNS reinforcement can effectively hinder dislocation motion, which improves the yield strength. The interaction between the edge dislocation and the GNS pair parallel to the (112) plane showed the strongest effect of blocking dislocations among the three cases, resulting in increases in the shear modulus and yield stress of 107% and 1400%, respectively. This remarkable enhancement was attributed to the Orowan "by-passing" strengthening mechanism, whereas cross-slip of dislocation segments was observed during looping around GNSs. Our results might contribute to the development of high-strength iron matrix composites.

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“…The Mg-Al alloy reinforced with 0.6 wt.% graphene nanoplatelets (GNPs) exhibits improvements in 0.2% yield strength, ultimate tensile and failure strain [8]. Moreover, bulk 1.0 vol.% GNS-Ni/Cu composites fabricated by spark plasma sintering show a 94% increase in yield strength [9]. Nevertheless, the GNSs tend to tangle and agglomerate into clusters, mainly due to the van der Waals interactions between aromatic rings [10].…”

Section: Introductionmentioning

confidence: 99%

“…Several reported methods to fabricate GNSs/metal composites are ball milling or ultrasonic disperion, and then follewed by sintering, casting, or electrodeposition [7][8][9][11][12][13][14]. However, these processes cannot effectively solve the dispersion problem of GNSs in the metal matrix.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of high-strength graphene nanosheets/Cu composites by accumulative roll bonding

Liu

Wei

Zhuang

et al. 2015

Materials Science and Engineering: A

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Enhancement of the mechanical properties of graphene–copper composites with graphene–nickel hybrids

Cited by 259 publications

References 46 publications

Development of Cu-Exfoliated Graphite Nanoplatelets (xGnP) Metal Matrix Composite by Powder Metallurgy Route

Development of Cu-Exfoliated Graphite Nanoplatelets (xGnP) Metal Matrix Composite by Powder Metallurgy Route

Interaction of Edge Dislocations with Graphene Nanosheets in Graphene/Fe Composites

Fabrication of high-strength graphene nanosheets/Cu composites by accumulative roll bonding

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