Carbon Nanotube/Aluminium Composites with Uniform Dispersion

Noguchi, Tōru; Magario, Akira; Fukazawa, Shigeru; Shimizu, Shuichi; Beppu, Junichi; Seki, Masayuki

doi:10.2320/matertrans.45.602

Cited by 227 publications

(107 citation statements)

References 5 publications

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“…Recently, Kwon et al reported on the tensile improvements realized in MWCNT-Al matrix composites fabricated by a nanoscale dispersion method providing a uniform dispersion of MWCNTs within the Al powders 12) followed by consolidation using spark plasma sintering (SPS) and a subsequent hot extrusion process. 13) In their study, formation of Al 4 C 3 at the interface, believed to favor the load transfer from the matrix to MWCNTs was attributed to the reaction between the liquid Al phase momentarily appeared during SPS and surface defects of MWCNTs.…”

Section: Introductionmentioning

confidence: 99%

Multi-Walled Carbon Nanotube-Aluminum Matrix Composites Prepared by Combination of Hetero-Agglomeration Method, Spark Plasma Sintering and Hot Extrusion

et al. 2011

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Multi-walled carbon nanotubes (MWCNTs) with outstanding mechanical properties are considered as an ultimate reinforcement for conventional metals such as aluminum (Al), though they require uniform dispersion and intimate contacts with the host metal matrix. However, bundled structure of chemically stable, pristine MWCNTs has been the main challenge to achieving the expected structural reinforcement. In addition, the sole contribution of MWCNTs in strengthening the metal matrix has not been recognized yet, due to the concurrent strengthening mechanisms such as metal's work hardening, grain refinement, etc. Here, we prepared MWCNT-Al matrix composite powders with uniform MWCNT dispersion by using hetero-agglomeration principle, and fabricated fully dense 1.0 vol% MWCNT-Al matrix composite bulk by using spark plasma sintering (SPS) and a subsequent hot extrusion process, with a 40% improved tensile strength and an elongation to failure of 27.3% similar to that of cast pure Al. During the SPS process, the nanoscale surface defects of MWCNTs were infiltrated by momentarily formed liquid Al and an intimate Al 4 C 3 -free interface was formed between MWCNTs and bare Al matrix. After the hot extrusion process, straight MWCNTs aligned in the extrusion axis found intimate contacts with the dynamically recovered, crack-free Al matrix. Our study suggests that the tensile improvement realized in our extruded/SPSed composites is directly originated from an effective load transfer at the MWCNT/Al interface, because no evidence of Al work hardening or the formation of interfacial Al 4 C 3 crystals was detected.

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Section: Introductionmentioning

confidence: 99%

Multi-Walled Carbon Nanotube-Aluminum Matrix Composites Prepared by Combination of Hetero-Agglomeration Method, Spark Plasma Sintering and Hot Extrusion

et al. 2011

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“…A precursor aimed at dispersing CNTs well was produced by the nanoscale dispersion method Noguchi et al, 2004). The precursor consisted of commercial gas atomized Al powder (ECKA Granules Co. Ltd., Japan, purity 99.85%, average particle size 14.82μm), multi-walled carbon nanotube (MWCNT, ILJIN Co. Ltd., Korea, purity 99.5%, average diameter and length 20 nm and 15 ), and natural rubber (NR).…”

Section: Methodsmentioning

confidence: 99%

Effect of Spark Plasma Sintering in Fabricating Carbon Nanotube Reinforced Aluminum Matrix Composite Materials

Kwon¹,

Kawasaki²

2011

Advances in Composite Materials for Medicine and Nanotechnology

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“…The applications include the use of CNTs in energy storage and energy conversion devices [82]- [87], high-strength composites [88]- [94], nanoprobes and sensors [95]- [116], actuators [117]- [124], electronic devices [7], [125]- [134], production of nanorods using CNTs as reacting templates [135]- [138], catalysis [139]- [144], and hydrogen storage media [145]- [151]. However, this paper attempts to report the existing and future applications of CNTs in the biomedical industry exclusively.…”

Section: Applicationsmentioning

confidence: 99%

Carbon Nanotubes for Biomedical Applications

2011

Carbon Nanostructures

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Abstract-Carbon nanotubes (CNTs) have many unique physical, mechanical, and electronic properties. These distinct properties may be exploited such that they can be used for numerous applications ranging from sensors and actuators to composites. As a result, in a very short duration, CNTs appear to have drawn the attention of both the industry and the academia. However, there are certain challenges that need proper attention before the CNTbased devices can be realized on a large scale in the commercial market. In this paper, we report the use of CNTs for biomedical applications. The paper describes the distinct physical, electronic, and mechanical properties of nanotubes. The basics of synthesis and purification of CNTs are also reviewed. The challenges associated with CNTs, which remain to be fully addressed for their maximum utilization for biomedical applications, are discussed.

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Carbon Nanotube/Aluminium Composites with Uniform Dispersion

Cited by 227 publications

References 5 publications

Multi-Walled Carbon Nanotube-Aluminum Matrix Composites Prepared by Combination of Hetero-Agglomeration Method, Spark Plasma Sintering and Hot Extrusion

Multi-Walled Carbon Nanotube-Aluminum Matrix Composites Prepared by Combination of Hetero-Agglomeration Method, Spark Plasma Sintering and Hot Extrusion

Effect of Spark Plasma Sintering in Fabricating Carbon Nanotube Reinforced Aluminum Matrix Composite Materials

Carbon Nanotubes for Biomedical Applications

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