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Tu, J.P.; Yang, Yong; Wang, L.Y.; Ma, Xiaochun; Zhang, X.B.

doi:10.1023/a:1016662114589

Cited by 167 publications

(56 citation statements)

References 8 publications

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“…The nano-composites reinforced by CNTs possess extraordinary properties [4,5]. The tribological properties of CNTreinforced Cu matrix composites have been investigated by Tu JP et al [6,7]. They found that the friction coefficient of the composites is reduced and the wear resistance is enhanced due to the effect of CNTs, indicating the CNTs in the composites are not damaged during the composite preparation and play a strengthening and toughening role in the metal matrix composites.…”

Section: Introductionmentioning

confidence: 99%

Tribological behaviors of Gra./Cu and CNTs/Cu composites with and without electric current

2018

MATEC Web Conf.

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Abstract. Gra./Cu composites and CNTs/Cu composites were respectively fabricated by powder metallurgy techniques. The experiments of high speed sliding with and without electric current were carried out to investigate their tribological behaviors. The results show that the friction coefficients and wear rates with electric current are higher than without electric current; under the same testing condition the friction coefficients and wear rates of CNTs/Cu are lower and the worn surfaces are more planar than Gra./Cu. CNTs can debase the effect of heat generating during sliding process on the composites. The tribological properties of CNTs/Cu composites are more excellent than Gra./Cu composites.

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Section: Introductionmentioning

confidence: 99%

Tribological behaviors of Gra./Cu and CNTs/Cu composites with and without electric current

2018

MATEC Web Conf.

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“…Such motivation relies on the well-established superior mechanical and transport properties of CNTs. A resulting metal-matrix bulk nanocomposites with improved mechanical and transport properties is to be expected [1,2,3,4]. The present investigation reports the synthesis and processing procedure followed by the structural and chemical characterization of a Cu -5 wt (%) MWCNT nanocomposite developed in our laboratory.…”

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confidence: 97%

Production and Structural-Chemical Characterization of Cu-MWCNT Nanocomposites

2011

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The objective of this study is to produce a bulk nanocomposite constituted by Copper reinforced with multi walled carbon nanotubes (MWCNTs) and evaluate the resulting mechanical and transport properties. Such motivation relies on the well-established superior mechanical and transport properties of CNTs. A resulting metal-matrix bulk nanocomposites with improved mechanical and transport properties is to be expected [1,2,3,4]. The present investigation reports the synthesis and processing procedure followed by the structural and chemical characterization of a Cu -5 wt (%) MWCNT nanocomposite developed in our laboratory. Purified MWCNT provided by UFMG Brazil were used, with diameters between 10-60 nm. MWCNTs were functionalized using a mixture of H 2 SO 4 : HNO 3 (3:1). Nanocomposite powders were produced by dissociation of a homogeneous suspension containing Cu(NO 3 ) 2 . 3H 2 O -MWCNT previously functionalized; followed by H 2 reduction of the obtained CuO-MWCNT precursor. Bulk nano-composite pellets were obtained by a pre-compactation under uniaxial pressure followed by isostatic pressure. Sintering of the compacted material was carrying out at 950°C under Argon atmosphere by 30 min.A FEI Titan operating at 300KV, a Jeol 2010 operating at 200KV and a SEM-FEG Magellan have been used as main characterization tools. Sample preparation used a FIB-Nanonova instrument. Conventional transmission electron microscopy using diffraction contrast showed well-attached copper nanoparticles (10 -20 nm range) on carbon nanotubes (Fig 1a and Fig 1b). After consolidation into pellet and sintering, the Cu matrix presented heterogeneous grain growth (50nm-300 m range), as observed in Fig 1c. Sample preparation using FIB, allowed the observation of a large electron beam transparent region. Ion beam image confirm the heterogeneous grain growth along the sample thickness as product of the cold compactation ( fig 2a). SEM-STEM observations under 5 kV have confirmed the presence of CNTs, taking in advantage the difference in Z contrast between carbon and copper. Oxygen is actually detected in the metal matrix, suggesting it arises from a post-oxidation stage, rather than due to an incomplete CuO particle reduction, Figs 2b and 2c. The interface of CNT's incorporated through the processing of the nanocomposite in the copper matrix has been analyzed using high resolution transmission electron microscopy (Fig 3a). Decreasing of CNTs diameter suggests a possible graphitization of CNTs along the thermo-mechanical processing. Analysis of Fourier transform shows the presence of Cu 3 O 4 in the matrix as product of re-oxidation as confirms by EDS ( Fig. 3b and Fig 3c) .

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“…Some of the MM-CNT composites prepared using sintering route are Cu-CNT [17,58], Al-CNT [21], W-Cu-CNT [18], Mg-CNT [59] and Ag-CNT [60]. In some cases…”

Section: Processing Of Cnt Reinforced Metal Matrix Compositesmentioning

confidence: 99%

“…In the preparation of Cu-CNT composites [17,58] through mixing, compaction and sintering route, CNTs were coated with Ni using electroless deposition to achieve good interfacial bond strength. Density of the composites was comparable up to 8 wt.% CNT addition beyond which it decreased drastically due to agglomeration.…”

Section: Processing Of Cnt Reinforced Metal Matrix Compositesmentioning

confidence: 99%

“…Ag-CNT [60] 91% reduction in COF and 140% reduction in the wear rate in Cu16vol.% CNT [58] Wear rate and Friction coefficient decreased by 60% for Cu-12wt.% CNT [17] Increased hardness (4.8 times) and tensile strength (2.8 times) in Al-5wt.% CNT [21] Hot pressing (Powders + CNT) mechanically alloyed/mixed followed by hot pressing Al-CNT [26,72],…”

Section: Thermal Spraymentioning

confidence: 99%

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Plasma And Cold Sprayed Aluminum Carbon Nanotube Composites: Quantification Of Nanotube Distribution And Multi-Scale Mechanical Properties

Bakshi¹

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Untitled

Cited by 167 publications

References 8 publications

Tribological behaviors of Gra./Cu and CNTs/Cu composites with and without electric current

Tribological behaviors of Gra./Cu and CNTs/Cu composites with and without electric current

Production and Structural-Chemical Characterization of Cu-MWCNT Nanocomposites

Plasma And Cold Sprayed Aluminum Carbon Nanotube Composites: Quantification Of Nanotube Distribution And Multi-Scale Mechanical Properties

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