Mixing of carbon nanotubes (CNTs) and aluminum powder for powder metallurgy use

Liao, Jinzhi Lois; Tan, Ming Jen

doi:10.1016/j.powtec.2010.12.001

Cited by 158 publications

(63 citation statements)

References 24 publications

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“…11,12 . Composites manufactured by the casting route 5,6,8 are usually challenging due to the different nature of the reinforcement that may have poor wettability and agglomeration problems 13 . Some reinforcements are highly reactive particularly at high temperature, which induce unwanted reactions between components 14 .…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Microstructural Response of an Aluminum Nanocomposite Reinforced with Carbon-Based Particles

et al. 2016

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The present work deals with the study of some aluminum (Al) composites reinforced with metallized-graphite (MG) particles prepared by mechanical milling and powder metallurgy routes. Density, morphology evolution and mechanical performance of composites were investigated as a function of MG concentration and milling time. The as-milled powders were characterized by X-ray diffraction and optical/electron microscopy; meanwhile, the mechanical testing was carried out on cylindrical specimens prepared from powders by powder metallurgy. Evidence reveals that high-energy ball milling induce a homogeneous dispersion of graphite nanoparticles in the Al matrix; this is related to an enhancement of hardness and strength response of studied composites. The composite sample with 0.5% MG addition (in weight) reached an increase of 40% on hardness and 50% on strength (compared with pure Al sample); nevertheless an adverse effect was observed with longer milling and/or higher MG concentration.

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Section: Introductionmentioning

confidence: 99%

Mechanical and Microstructural Response of an Aluminum Nanocomposite Reinforced with Carbon-Based Particles

et al. 2016

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“…The use of CNT as reinforcing phase for MMC has been a challenge because of its high surface area and the resulting Van der Walls interactions that make difficult its dispersion 5,6 . Furthermore, it has been observed that CNT has low wettability by most metals, resulting in low interaction with the matrix and low potential for strengthening by load transfer mechanisms [7][8][9] . Many authors have tried to improve CNT dispersion in metal matrix by several processing routes, as thermal spray 6,10 , high energy ball milling 11 , friction stir processing 12 .…”

mentioning

confidence: 99%

Production of TiO2 Coated Multiwall Carbon Nanotubes by the Sol-Gel Technique

2017

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In recent years, efforts in developing high strength-low density materials are increasing significantly. One of the promising materials to attend this demand is the carbon nanotube (CNT), to be used mainly as a reinforcing phase in lightweight metal matrix composites (MMC). In the present work, the sol-gel technique has been employed to obtain TiO 2 coating on the surface of commercial multiwall carbon nanotubes (MWCNT). The aim of such coating is to improve the thermal stability of MWCNT in oxidize environment, which is necessary in most of MMC processing routes. Calcination in inert atmosphere was performed in order to crystallize a stable coating phase. The hybrid CNT/TiO 2 nanocomposite was characterized by X-Ray Diffractometry (XRD), Raman spectroscopy, Thermogravimetry (TGA) and Field Emission Gun -Scanning Electron Microscopy (FEG-SEM). The coating structure was observed to change from anatase to rutile, as the calcination temperature increases from 500 to 1000ºC. Results from thermogravimetric analysis showed that the samples calcined at 1000 ºC were more resistant to oxidation at high temperatures.

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“…Aluminum, magnesium and their alloys are widely used as materials for such a matrix; and particles of aluminum oxide (Al 2 O 3 ), silicon carbide (SiC) and others, as reinforcement [1][2][3][4]. Using multi-walled carbon nanotubes (MWCNT) as the strengthening phase is promising for composite production, since such nanotubes have high mechanical properties (elastic modulus up to 1.5 GPa), which, in turn, affects the mechanical properties of the resulting composite materials [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…Synthesis of aluminum-based nanotube-reinforced composites makes a wide use of powder metallurgy [5,7]. The greatest challenge when producing composite materials using these methods is known to be the formation of aluminum carbide (Al 4 C 3 ) [8,9] at the Al/MWCNT interface, which transforms nanotubes in the metal matrix and, consequently, prevents achieving high mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Influence the carbon nanotubes on the structure and mechanical properties of aluminum-based metal matrix composites

Vorozhtsov¹,

Kvetinskaya²,

Khurstalyov³

et al. 2016

AIP Conference Proceedings

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The mechanical properties measurement of multiwall carbon nanotube reinforced nanocrystalline aluminum matrix composite AIP Conference Proceedings 1661, 080025 (2015) Abstract. It is known that metal matrix composites reinforced with non-metallic inclusions are of great interest in various fields of technology owing to a good combination strength to weight ratio. Carbon nanotubes (CNTs) are expected to be ideal reinforcements for composite materials due to their high modulus and low density. In this paper metal matrix composites were obtained through hot pressing of powder mixtures Al-1% and 5% carbon nanotubes at different isothermal time. Hardness and density of materials went up with an increase in the isothermal holding time. However, the hardness of composites decreases with an increase the nanotubes content in the material.

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Mixing of carbon nanotubes (CNTs) and aluminum powder for powder metallurgy use

Cited by 158 publications

References 24 publications

Mechanical and Microstructural Response of an Aluminum Nanocomposite Reinforced with Carbon-Based Particles

Mechanical and Microstructural Response of an Aluminum Nanocomposite Reinforced with Carbon-Based Particles

Production of TiO2 Coated Multiwall Carbon Nanotubes by the Sol-Gel Technique

Influence the carbon nanotubes on the structure and mechanical properties of aluminum-based metal matrix composites

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