An atomic-level understanding of the strengthening mechanism of aluminum matrix composites reinforced by aligned carbon nanotubes

Xiang, Junfeng; Xie, Lijing; Meguid, S. A.; Pang, Siqin; Yi, Jie; Zhang, Yu; Liang, Ruo

doi:10.1016/j.commatsci.2016.11.032

Cited by 62 publications

(25 citation statements)

References 46 publications

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“…In nanocomposite production, the structure of the CNTs can affect their final properties. For instance, Xiang et al [37], reported that armchair CNTs provides more significant mechanical properties of enhancement to the nanocomposites than the zigzag ones do; in contrast, Wang et al [36] observed that the zigzag CNTs offer more strength for raising the elastic modulus, while armchair CNTs induces superior elongation of the nanocomposites.…”

Section: Characterization Of the Cntsmentioning

confidence: 99%

“…The diameter of CNTs also plays an important role in the mechanical properties of nanocomposites. Some authors [37,38] investigated the effect of the diameter of the CNTs on the mechanical properties of the nanocomposites by MD simulation. The results show that with the increase in the diameter of the CNTs, the Young modulus and tensile strength also increase.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Morphology and Structure of MWCNTs on Metal Matrix Nanocomposites

Carneiro

Simões

2020

Materials

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The effect of using different carbon nanotubes (CNTs) on the production of nanocomposites was evaluated in this work. The investigated CNTs were multi-walled carbon nanotubes (MWCNTs) with different morphologies and structures. The main objective was to relate the results reported by numerical simulation with the results obtained experimentally in order to validate these methodologies. A detailed characterization of CNTs was carried out to establish the different main characteristics, such as inner and outer diameters, defects, structure and the number of walls. Metal matrix nanocomposites were produced using the powder metallurgy route. The experimental results show that the morphology and structure of MWCNTs have a significant effect on the dispersion process for nanocomposite production. Straight CNTs with a larger diameter and with few defects allow for the production of nanocomposites with uniform dispersion and strong interface bonding, leading to a higher hardness value. In addition, the CNT introduction into a metal matrix induces a change in the deformation behavior that plays an important role in the strengthening mechanisms. Although some aspects are not considered in the molecular dynamic (MD) simulation, such as the CNT random orientation and CNT agglomeration, some comparative relationships can be performed in order to validate some methodologies. While the structure and morphology of the CNTs have a significant influence on the dispersion process, the influence of the diameter and the functionalization treatment on the properties of the nanocomposites is also identified. The experimental results show that the decrease in the diameter of the CNTs and the use of functionalized CNTs also contribute to the obtention of lower mechanical properties of the nanocomposites, as is pointed out in the results of MD carried out in nanocomposites.

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Section: Characterization Of the Cntsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Morphology and Structure of MWCNTs on Metal Matrix Nanocomposites

Carneiro

Simões

2020

Materials

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“…The equilibration was performed for 20000 time steps. Then the specimens were subjected to a uniaxial tensile loading in the Z-direction in the NVT ensemble [30,31] at a strain rate of 10 10 s −1 . Although the strain rate used is not similar to experimental strain rates, this work will provide insights into the underlying atomistic mechanisms of CNT reinforced NC Al metal matrix nanocomposites during the deformation process.…”

Section: Simulation Detailsmentioning

confidence: 99%

“…Xiang et al and Lu et al have showed that interfacial shear stresses (interactions) depend on the CNT chirality and interaction perimeter [31,59]. (5,5) and (15,15) diameters.…”

Section: Chiralitymentioning

confidence: 99%

“…For instance, the mechanical properties (toughness and Young's modulus) of CNT reinforced single crystal (SC) Al composites is found to be enhanced and CNTs restrict the fracture of the composite by bearing extreme load [30]. The mechanical properties of such material are influenced by diameter and chirality of CNT [31] and the rate of CNT reinforcement [32]. Silvestre et.…”

Section: Introductionmentioning

confidence: 99%

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Molecular Dynamics simulation based investigation of possible enhancement in strength and ductility of nanocrystalline aluminum by CNT reinforcement

Pal

Babu

Gargeya

et al. 2020

Materials Chemistry and Physics

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Molecular dynamics (MD) based study of nanocrystalline (NC) Al and CNT (carbon nanotube) reinforced NC Al specimens having grain sizes ~9 nm have been carried out under tensile loading using hybrid potentials for different temperatures (10 K, 300 K and 681 K) at a particular strain rate of 10 10 s-1. Structural variation and defect evolution during the deformation have been investigated. An enhancement in both strength and ductility is observed in case of the CNT embedded NC Al specimens with respect to NC Al specimen and such improvement is significant in case of (30,30) CNT embedded NC Al specimen. It is also found that NC Al matrix is fractured first, then the CNT at lower test temperature, whereas at high temperature, the CNT fractures before the matrix.

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An Atomistic Investigation of the Strengthening Mechanism of Aluminum Matrix Composites Reinforced by Intergranular and Intragranular Carbon Nanotubes

Gao,

Yan,

2023

Lecture Notes in Mechanical Engineering

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An atomic-level understanding of the strengthening mechanism of aluminum matrix composites reinforced by aligned carbon nanotubes

Cited by 62 publications

References 46 publications

Effect of Morphology and Structure of MWCNTs on Metal Matrix Nanocomposites

Effect of Morphology and Structure of MWCNTs on Metal Matrix Nanocomposites

Molecular Dynamics simulation based investigation of possible enhancement in strength and ductility of nanocrystalline aluminum by CNT reinforcement

An Atomistic Investigation of the Strengthening Mechanism of Aluminum Matrix Composites Reinforced by Intergranular and Intragranular Carbon Nanotubes

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