An approach for homogeneous carbon nanotube dispersion in Al matrix composites

Chen, Biao; Li, Shunfeng; Imai, Hisashi; Jia, Lei; Umeda, Junko; Takahashi, Makoto; Kondoh, Katsuyoshi

doi:10.1016/j.matdes.2015.02.003

Cited by 176 publications

(69 citation statements)

References 41 publications

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“…However, a YS of~90 MPa was reported for the composite, which was much lower than the present 0.75CNT/Al composite (114.1 MPa). Because the previous composite was in as-sinter state [21], the simultaneously good mechanical and excellent conductive performances in the present study might be attributed to the improved CNT alignment by using hot-extrusion process [31]. Recently, strong CNT/Al composites with YS over 200 MPa, such as 256 MPa reported by Chen et al [23] and 278 MPa by Yang et al [13], were fabricated by using HEBM and hot-extrusion process.…”

Section: Methodsmentioning

confidence: 71%

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Carbon nanotube induced microstructural characteristics in powder metallurgy Al matrix composites and their effects on mechanical and conductive properties

Chen

Imai

et al. 2015

Journal of Alloys and Compounds

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Section: Methodsmentioning

confidence: 71%

“…where s M was the YS of composite matrix and R is the reinforcing efficiency related to load transfer efficiency (R is 28 reported in our previous study [31]). Considering the grain refinement induced strengthening using…”

Section: Methodsmentioning

confidence: 99%

Carbon nanotube induced microstructural characteristics in powder metallurgy Al matrix composites and their effects on mechanical and conductive properties

Chen

Imai

et al. 2015

Journal of Alloys and Compounds

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“…The overlaps between CNTs were limited, suggesting a high dispersion quality. Compared with the previous solution coating process [21], improved CNT dispersion was achieved in the present process due to the dynamic blending-assisted dispersion of CNTs [10]. Figure 3 shows the measured electrical conductivity of the as-sintered pure Al and CNT-Al composites.…”

Section: Resultsmentioning

confidence: 85%

“…A homogeneous CNT dispersion in composites is the precondition, because there is little bonding between matrix and the CNTs inside CNT clusters, which is detrimental for effective load transfer [6]. To overcome the problems of CNT agglomeration, some novel methods, such as the in-situ grown method [7], flake powder metallurgy [8], friction stir welding [9], and solution ball milling (SBM) [10], have been recently developed. Afterward, how to effectively consolidate CNT-Al powder mixtures to bulk materials became a concentrated topic.…”

Section: Introductionmentioning

confidence: 99%

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Sintering Behaviors of Carbon Nanotubes—Aluminum Composite Powders

Chen

Kondoh

2016

Metals

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Carbon nanotubes (CNTs) are promising reinforcements for fabricating aluminum (Al) matrix composites with outstanding properties. The understanding of the consolidation process of CNT-Al composite powders plays a significant role in achieving high performances of bulk composites. In this study, an advanced consolidation technique of spark plasma sintering (SPS) was used to fabricate CNT-Al composites with homogeneously dispersed CNTs. The sintering kinetics of pure Al powders and those powders coated with 1 wt % CNTs were studied. By combining the electrical conductivity and relative density results, it was found that the sintering process consisted of two stages with distinct densification rates. The second stage with a much lower rate was governed by the breaking down of alumina films at primary particle boundaries. The activation energy of the controlling second stage increased by 55% in CNT-Al composite powders compared to that of pure Al powder. As a result, CNT addition led to the overall decrease of sintering ability, which raised a challenge in the processing of CNT-Al composites.

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Carbon Nanotube‐Reinforced Aluminum Matrix Composites

Mohammed

Chen

2019

Adv Eng Mater

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Herein, the investigations conducted in the area of aluminum (Al) matrix composites reinforced with carbon nanotubes (CNTs) are presented. The application of CNT reinforcement in Al alloys is driven by its exceptional chemical and mechanical properties. The critical issues in the processing techniques, challenges in the interfacial mechanisms between the Al matrix and CNTs, and strengthening effects due to the presence of reinforcements are reviewed. The mechanical properties of CNT/Al composites are found to be effectively enhanced with an addition of CNTs even at a small amount. The extent of strength improvements depends mainly on the dispersion of CNTs in the matrix and interfacial bonding between the matrix and CNTs. Limited theoretical modeling can predict the properties of CNT/Al composites to some extent, but without considering the detailed processing parameters. Based on the gaps identified here, future research directions are suggested, including the relationships between the processing parameters and micro-and nanostructures, and multiscale mechanical modeling and simulation, aiming to further understand the strengthening mechanisms and develop advanced CNT-reinforced Al and other metal composites for critical engineering applications.

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An approach for homogeneous carbon nanotube dispersion in Al matrix composites

Cited by 176 publications

References 41 publications

Carbon nanotube induced microstructural characteristics in powder metallurgy Al matrix composites and their effects on mechanical and conductive properties

Carbon nanotube induced microstructural characteristics in powder metallurgy Al matrix composites and their effects on mechanical and conductive properties

Sintering Behaviors of Carbon Nanotubes—Aluminum Composite Powders

Carbon Nanotube‐Reinforced Aluminum Matrix Composites

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