Strengthening behavior of carbon nanotube-graphene hybrids in copper matrix composites

Chen, Xiaofeng; Tao, Jingmei; Yi, Jianhong; Liu, Yichun; Li, Caiju; Bao, Rui

doi:10.1016/j.msea.2018.02.006

Cited by 88 publications

(33 citation statements)

References 43 publications

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“…The dependence of the hardness has a maximum at 0.5 wt. % FS attaining a value of 160 ± 4 HB, which is higher than the majority of the data reported earlier for any Cu-C composites [ 1 , 2 , 3 , 4 , 5 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 ]. A further increase of FS concentration leads to the hardness falling down to 75 HB that may be explained by increase of Cu-boundaries quantity and appearance of soft FS agglomerates due to its inhomogeneous distribution.…”

Section: Resultscontrasting

confidence: 58%

“…Copper-based composites reinforced with carbon nanoparticles attract interest due to a combination of mechanical and electrical properties [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 ]; besides, these composites mostly have low friction coefficient and wear [ 14 , 15 , 16 , 17 , 18 , 19 ], which is necessary for sliding contact application.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Fullerene Soot Nanoparticles on the Microstructure and Properties of Copper-Based Composites

et al. 2020

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Copper-based composite materials strengthened with nanosized fullerene soot particles were produced by mechanical milling and hot pressing technology with a content of carbon up to 5 wt. %. The microstructure of the composite powders and the compacts prepared using them were examined by light microscopy, SEM, EDS, XRD, and XPS; hardness, heat conductivity, and tribological characteristics were measured. The interesting feature of the observed microstructure was a “marble” pattern formed by a white boundary net. The study shows homogeneous distribution of carbon inside the copper grains and its lower concentration in the grain boundaries. The effect was caused by a reaction of carbon with oxygen adsorbed by the copper particles surface. The maximal hardness of the material is 160 HB for the sample with 0.5 wt. % of fullerene soot; this material has the minimal friction coefficient (0.12) and wear in a dry friction condition. Heat conductivity of the material (Cu-0.5 wt. % C) is 288 W/m*K.

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Section: Resultscontrasting

confidence: 58%

Section: Introductionmentioning

confidence: 99%

The Effect of Fullerene Soot Nanoparticles on the Microstructure and Properties of Copper-Based Composites

et al. 2020

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“…Clusters of rGO ( Fig. 5b) observed on the Al surface can be attributed to large specific surface area of rGO and the Van der Waals forces [32]. Individual CNTs are linked by rGO sheets and with few CNT only network (Fig.…”

Section: Microstructure Analysismentioning

confidence: 95%

Effect of Carbon Nanotube (CNT) Content on the Hardness, Wear Resistance and Thermal Expansion of In-Situ Reduced Graphene Oxide (rGO)-Reinforced Aluminum Matrix Composites

et al. 2019

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Aluminum matrix composites reinforced with reduced graphene oxide (rGO) and hybrid of carbon nanotube (CNT) and rGO are fabricated by solution coating powder metallurgy process. The hardness, wear resistance and coefficient of thermal expansion (CTE) of the reinforced aluminum composites and the associated microstructural changes with rGO range (0.2-0.6 wt. %) and hybrids of 0.2 wt. % CNT-rGO at different ratios have been investigated. The intensive microstructural observations show that rGO is adsorbed on Al particles and uniformly distributed in the Al matrix composites. The hardness values of the composites increase significantly with rGO reinforcement exhibiting the maximum hardness at 0.4 wt. % rGO. Compared with the hybrid composites CNT-rGO/Al counterparts fabricated by the same route and wt. percent of 0.2, the hardness values in the hybrid CNT-rGO increase considerably. Similar to the hardness, the results of wear tests also exhibit corresponding variation in the values of the wear rates. The improvement in the wear resistance of the hybrid CNT-rGO/Al composite is pronounced in this work. Whereas the rGO reinforcements decrease significantly the wear rate of the aluminum-base by 98%, the wear resistance of the corresponding hybrid CNT-rGO is significantly higher than that of the preceding composites. Maximum CTE reduction of 28% was recorded for hybrid CNT-rGO (1:1) reinforced composite.

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“…For the AFW, its yield strength contains the strength due to the dispersed nano-precipitates, the fine grans and the hard texture. The precipitation strengthening of the AFW can be calculated on the basis of the Orowan-Ashby equation [25,26]:…”

Section: Strength Degradation Behaviormentioning

confidence: 99%

Role of Multi-Scale Microstructure in the Degradation of Al Wire for Power Transmission

Liu

et al. 2020

Applied Sciences

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As common conductive materials, Al wires are used on overhead transmission lines under long-term heating conditions. In this study, the strength degradation behavior and the strength-electrical conductivity relation of the commercially pure Al wires (CPAWs) and the Al-Fe wires (AFWs) annealed at various temperatures were investigated based on the microstructure evolution. The strength degradation rate of the AFW is always higher than that of the CPAW. A linear trade-off relation between strength and electrical conductivity for the annealed Al wires are clarified. The results reveal that the mechanisms behind the trade-off relation between the strength and the electrical conductivity for the annealed CPAWs and the annealed AFWs are the recovery of dislocations and the obvious increase of grain width, which leads to the decrease of strength and the increase of electrical conductivity. The coalescence of precipitate in the AFW leads to the obvious decrease of strength, which results in the higher strength degradation rate for the AFW as compared with that for the CPAW. Consequently, the principle of microstructure design for anti-degradation of Al wire is presented.

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Strengthening behavior of carbon nanotube-graphene hybrids in copper matrix composites

Cited by 88 publications

References 43 publications

The Effect of Fullerene Soot Nanoparticles on the Microstructure and Properties of Copper-Based Composites

The Effect of Fullerene Soot Nanoparticles on the Microstructure and Properties of Copper-Based Composites

Effect of Carbon Nanotube (CNT) Content on the Hardness, Wear Resistance and Thermal Expansion of In-Situ Reduced Graphene Oxide (rGO)-Reinforced Aluminum Matrix Composites

Role of Multi-Scale Microstructure in the Degradation of Al Wire for Power Transmission

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