Multi-layer graphene/copper composites: Preparation using high-ratio differential speed rolling, microstructure and mechanical properties

Kim, Woo Jin; Lee, T.J.; Han, Seungoh

doi:10.1016/j.carbon.2013.11.058

Cited by 335 publications

(125 citation statements)

References 32 publications

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“…Kim et al [16] used ball milling and high-ratio differential speed rolling (HRDSR) to fabricate multi-layer graphene (MLG) reinforced Cu matrix composites. The strength of MLG/Cu composites was enhanced due to the increased dispersion of the MLGs.…”

Section: Introductionmentioning

confidence: 99%

“…Notably, the poor dispersion of GNSs in the metal matrix directly affects the mechanical and electronic properties of the GNSs/metal composites. By using the rolling process, Sruti [15] and Kim [16] prepared the GNSs/metal composites with extremely uniform microstructure and high electrical conductivity. In their method [15], graphene oxide was spread on the In and In-Ga alloy foils, then the composite foils were repeatedly processed by folding and rolling.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Introductionmentioning

confidence: 99%

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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“…As shown in Figure 7c, BN is well embedded in copper matrix without pull-out, which indicates that BN and copper matrix have a good interfacial bonding strength. In addition, the thermal expansion mismatching of GNPs and Cu matrix can lead to residual stress resulting in the increase of dislocation density in matrix, which can also contribute to strengthen the nanocomposites [28]. Besides, when the interface between graphene and copper matrix combines well, it can effectively transfer load, thus improving the strength of the composites [29].…”

Section: Strengthening Mechanism Analysis Of Cu/ti 3 Sic 2 /C/bn/gnpsmentioning

confidence: 99%

Effects of Multi-Phase Reinforcements on Microstructures, Mechanical and Tribological Properties of Cu/Ti3SiC2/C/BN/GNPs Nanocomposites Sintered by Vacuum Hot-Pressing and Hot Isostatic Pressing

Shao

Sun

Liu

et al. 2016

Metals

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Cu/Ti 3 SiC 2 /C/BN/GNPs nanocomposites were prepared by vacuum hot-pressing (HP) sintering and hot isostatic pressing (HIP) sintering methods. Microstructures, mechanical and tribological properties of Cu/Ti 3 SiC 2 /C/BN/GNPs nanocomposites were investigated. Microstructures were examined by optical microscopy (OM), X-ray diffraction (XRD) and scanning electron microscope (SEM). Mechanical properties were determined by the relative density, micro-Vickers hardness, as well as tensile strength, compressive strength and shear strength. Tribological behavior of the Cu/Ti 3 SiC 2 /C/BN/GNPs composite against the GCr15 steel ring was evaluated using an M-2000 wear tester with high tangential sliding velocity. Results demonstrated that BN and graphene nano-platelets (GNPs) have an impact on the microstructures and mechanical properties of Cu/Ti 3 SiC 2 /C/BN/GNPs nanocomposites. Based on microstructures, and mechanical and tribological properties of Cu/Ti 3 SiC 2 /C/BN/GNP nanocomposites, strengthening, fracture and wear mechanisms for synergistic enhancement by multi-phase reinforcements were analyzed.Keywords: Cu/Ti 3 SiC 2 /C/BN/GNPs nanocomposites; hot isostatic pressing; microstructure; mechanical properties; wear BackgroundCopper matrix self-lubricating composites are widely used in many industrial applications, such as friction materials, bearings, bushes, brake pads/discs, electrical sliding contacts and fusion reactors, due to their excellent anti-friction, wear properties, good thermal, electrical conductivities, superior strength and ease of production [1-6]. As many reports have revealed, copper-graphite is one of the most often-used solid self-lubricating materials for graphite's lamellar structure [6], and copper-graphite composites have improved wear resistance, lower wear loss and friction coefficients than pure copper [7,8]. However, the main inadequacy of using graphite as self-lubricant is the unsatisfactory mechanical properties of the composites [9,10]. Due to the impressive thermal, electrical, mechanical and tribological properties, graphene is a promising reinforcement for copper matrix, and an increasing number of researches have examined Cu/graphene composites aiming to improve their mechanical and tribological properties [4,9,11]. The results reveal that the presence of graphene in matrix can not only improve the mechanical properties but also decrease both the friction coefficient and the wear rate of composites [12]. Nevertheless, the agglomeration of graphene nano-platelets (GNPs) and interfacial interactions significantly affect the strengthening efficiency of

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“…This results in high strength of the composites. The strengthening that has been gained in the Cu-xGnP composites through the homogeneous dispersion of the graphite nanoplatelets in the Cu matrix can be attributed to the Orowan strengthening mechanism [32] [41]. Cu-based metal matrix composites are used in a wide range of applications like heat exchangers, structural parts, electrical connectors, in contacts like brushes, frictional parts of machines like bearings and bushings etc.…”

Section: S N Alam Et Almentioning

confidence: 99%

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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Multi-layer graphene/copper composites: Preparation using high-ratio differential speed rolling, microstructure and mechanical properties

Cited by 335 publications

References 32 publications

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

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

Effects of Multi-Phase Reinforcements on Microstructures, Mechanical and Tribological Properties of Cu/Ti3SiC2/C/BN/GNPs Nanocomposites Sintered by Vacuum Hot-Pressing and Hot Isostatic Pressing

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

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