Mechanical properties of graphene nanoplates reinforced copper matrix composites prepared by electrostatic self-assembly and spark plasma sintering

Shao, Guosen; Liu, Ping; Zhang, Ke; Li, Wei; Chen, Xiaohong; Ma, Fei

doi:10.1016/j.msea.2018.10.067

Cited by 83 publications

(30 citation statements)

References 27 publications

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“…The high-resolution C 1 s spectra show that -CH 2 CH 2 -bonds exist at binding energies of 284.55 eV and 285.78 eV ( figure 12(b)). CTAB, which contains a large amount of alkyl groups (-CH 2 -), can be ionized in the H 2 O-having ethanol solution [24], and thus leading the alloy powers to carry positive charge. In addition, GNPs will be induced to carry negative charge due to electrostatic induction when they are closed to the alloy powders with positive charge during mechanical stirring [25], and then are absorbed on the powder surfaces since they are light and have a slice shape.…”

Section: Verification Of Mixing Results and Corresponding Mechanismmentioning

confidence: 99%

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Mixing of graphene nanoplatelets with magnesium alloy powders by electrostatic adsorption

Wang

Chen

2020

Mater. Res. Express

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Mg matrix composites reinforced by graphene nanoplatelets (GNPs) offers an efficient approach for improving the mechanical properties of Mg alloys. Unfortunately, the poor uniform dispersion of GNPs into Mg matrix vastly restricts their development. In addition, surface oxidation of Mg alloy powders is always serious. To alleviate these issues, pickling and surface modification technologies of ZK61 Mg alloy powders and mixing process with GNPs have been investigated. The results show that ZK61 alloy powders with smooth surface and low degree of oxidation can be obtained after being simultaneously mechanically stirred and ultrasonically treated for 30 min in a 0.2 vol% HF ethanol solution. They were then rinsed and dried, and modified by 0.3% wt% cetyl trimethyl ammonium bromide to carry a positive charge. Subsequently, GNPs ethanol suspension was poured into the modified ZK61 alloy powders solution and mechanically stirred for 10 min, and then a powder mixture that GNPs randomly attached on the Mg powders was obtained after drying.XPS analysis reveals that GNPs were adsorbed on the surfaces of the modified Mg powders by the mechanism of electrostatic adsorption. The achieved method for preparing GNPs/ZK61 alloy mixture powders provides a new strategy for fabricating Mg matrix composites reinforced by uniformly distributed GNPs.

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Section: Verification Of Mixing Results and Corresponding Mechanismmentioning

confidence: 99%

“…It is known that when cetyl trimethyl ammonium bromide (CTAB) dissolves into aqueous solutions, a kind of positive ions ([C 16 H 33 N(CH 3 ) 3 ] + ) can be dissociated [24]. If Mg alloy powders are treated using this reagent in an aqueous solution and their surfaces may carry a positive charge.…”

Section: Introductionmentioning

confidence: 99%

Mixing of graphene nanoplatelets with magnesium alloy powders by electrostatic adsorption

Wang

Chen

2020

Mater. Res. Express

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“…In the case of nano-powders, which suffer from extensive grain growth during conventional sintering, SPS is particularly suitable for the consolidating of the powders. In the literature, several works have been devoted to fabricating graphene-reinforced nanocomposites by the SPS process [143,144,145].…”

Section: Fabrication Of Mmncs Reinforced By Graphenementioning

confidence: 99%

An Overview of the Recent Developments in Metal Matrix Nanocomposites Reinforced by Graphene

2019

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Two-dimensional graphene plateletes with unique mechanical, electrical and thermo-physical properties could attract more attention for their employed as reinforcements in the production of new metal matrix nanocomposites (MMNCs), due to superior characteristics, such as being lightweight, high strength and high performance. Over the last years, due to the rapid advances of nanotechnology, increasing demand for the development of advanced MMNCs for various applications, such as structural engineering and functional device applications, has been generated. The purpose of this work is to review recent research into the development in the powder-based production, property characterization and application of magnesium, aluminum, copper, nickel, titanium and iron matrix nanocomposites reinforced with graphene. These include a comparison between the properties of graphene and another well-known carbonaceous reinforcement (carbon nanotube), following by powder-based processing strategies of MMNCs above, their mechanical and tribological properties and their electrical and thermal conductivities. The effects of graphene distribution in the metal matrices and the types of interfacial bonding are also discussed. Fundamentals and the structure–property relationship of such novel nanocomposites have also been discussed and reported.

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“…Graphene, a novel two-dimensional material (single-layer graphene thickness is 0.335 nm), is a hexagonal lattice planar film composed of a single layer of carbon atoms in a SP 2 hybrid connection [1][2][3]. The unique physical and chemical properties of graphene, such as ultra-thin geometry, chemical inertness, thermal and chemical stability, mechanical strength and impermeability to ion diffusion [4][5][6][7], make it widely used in the field of anti-corrosion [8,9], energy storage [10,11], optical materials [12,13], abrasion-resistant composite materials [14], high-strength composite materials [15] etc.…”

Section: Introductionmentioning

confidence: 99%

“…Copper and its alloys have been widely used in ground transportation, aerospace, military, marine and other fields for their excellent machinability and high thermal and electrical ductility [20][21][22]. However, the corrosion loss of copper and its alloys has been a problem that has been plagued.…”

Section: Introductionmentioning

confidence: 99%

The synthesis of graphene coated copper from PMMA and the anticorrosion performance of copper substrate

Liu

Chen

et al. 2020

Mater. Res. Express

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In this research, the low temperature process for growing graphene from solid carbon source PMMA under atmospheric pressure was firstly investigated. Through adjusting the growth temperature (600°C-800°C) and other process parameters, using the chemical vapor deposition method, single or double layers of graphene grown on a copper substrate. Without control pressure, this way improved controllability of graphene preparation and reduced production costs. The morphology, quality of graphene was revealed by SEM, XPS, Raman, UV-vis. Additionally, the conductive test results illustrate that the graphene on the surface of the copper matrix slightly soars the conductivity of copper. This is due to the process of annealing and growth that alters the structure of the material. The results of the Tafel experiments, electrochemical impedance spectroscopy (EIS) measurements and cyclic voltammetry (CV) tests demonstrate that the graphene film can effectively improve the corrosion resistance of the copper matrix. Compared to the single layer graphene coating, doublelayers graphene coating has a better anti-corrosion effect. This is in that the double-layers graphene coating can block the defects of the single-layer graphene in time, and better prevent the intrusion of Cl − into the copper matrix, so as to achieve a good anti-corrosion effect.

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Mechanical properties of graphene nanoplates reinforced copper matrix composites prepared by electrostatic self-assembly and spark plasma sintering

Cited by 83 publications

References 27 publications

Mixing of graphene nanoplatelets with magnesium alloy powders by electrostatic adsorption

Mixing of graphene nanoplatelets with magnesium alloy powders by electrostatic adsorption

An Overview of the Recent Developments in Metal Matrix Nanocomposites Reinforced by Graphene

The synthesis of graphene coated copper from PMMA and the anticorrosion performance of copper substrate

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