Length effect of carbon nanotubes on the strengthening mechanisms in metal matrix composites

B. Chen; J. Shen; X. Ye; L. Jia; S. Li; J. Umeda; M. Takahashi; K. Kondoh

doi:10.1016/j.actamat.2017.08.048

Length effect of carbon nanotubes on the strengthening mechanisms in metal matrix composites

B. Chen, J. Shen, X. Ye, L. Jia, S. Li, J. Umeda, M. Takahashi, K. Kondoh

Research output: Contribution to journal › Article › peer-review

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Abstract

In the present work, we studied the effect of the aspect ratio of carbon nanotubes (CNTs) on strengthening aluminum metal matrix composites (Al MMCs). To this end, Al samples reinforced with CNTs of various aspect ratios were produced via three different powder metallurgy methods. Microstructural examination revealed that the CNTs were uniformly dispersed in the materials with a range of aspect ratios from 6.5 to 55. The tensile results showed that the CNTs exhibited a strong strengthening effect in the composites regardless of their aspect ratios. However, the post-loading examination and quantitative analysis indicated that there was a strengthening mechanism transition for CNTs, which was closely associated with the aspect ratio or length of CNTs. The origin of such transition was explored from the viewpoint of dislocation-CNTs interaction under loading. The findings may provide a new insight in understanding the strengthening behaviors of CNT-reinforced MMCs.

Original language	English
Pages (from-to)	317-325
Number of pages	9
Journal	Acta Materialia
Volume	140
DOIs	https://doi.org/10.1016/j.actamat.2017.08.048
State	Published - Nov 2017
Externally published	Yes

Keywords

Carbon nanotubes (CNTs)
Length effect
Load transfer
Metal matrix composites (MMCs)
Orowan mechanism
Strengthening mechanisms

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10.1016/j.actamat.2017.08.048

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title = "Length effect of carbon nanotubes on the strengthening mechanisms in metal matrix composites",

abstract = "In the present work, we studied the effect of the aspect ratio of carbon nanotubes (CNTs) on strengthening aluminum metal matrix composites (Al MMCs). To this end, Al samples reinforced with CNTs of various aspect ratios were produced via three different powder metallurgy methods. Microstructural examination revealed that the CNTs were uniformly dispersed in the materials with a range of aspect ratios from 6.5 to 55. The tensile results showed that the CNTs exhibited a strong strengthening effect in the composites regardless of their aspect ratios. However, the post-loading examination and quantitative analysis indicated that there was a strengthening mechanism transition for CNTs, which was closely associated with the aspect ratio or length of CNTs. The origin of such transition was explored from the viewpoint of dislocation-CNTs interaction under loading. The findings may provide a new insight in understanding the strengthening behaviors of CNT-reinforced MMCs.",

keywords = "Carbon nanotubes (CNTs), Length effect, Load transfer, Metal matrix composites (MMCs), Orowan mechanism, Strengthening mechanisms",

author = "B. Chen and J. Shen and X. Ye and L. Jia and S. Li and J. Umeda and M. Takahashi and K. Kondoh",

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year = "2017",

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doi = "10.1016/j.actamat.2017.08.048",

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TY - JOUR

T1 - Length effect of carbon nanotubes on the strengthening mechanisms in metal matrix composites

AU - Chen, B.

AU - Shen, J.

AU - Ye, X.

AU - Jia, L.

AU - Li, S.

AU - Umeda, J.

AU - Takahashi, M.

AU - Kondoh, K.

PY - 2017/11

Y1 - 2017/11

N2 - In the present work, we studied the effect of the aspect ratio of carbon nanotubes (CNTs) on strengthening aluminum metal matrix composites (Al MMCs). To this end, Al samples reinforced with CNTs of various aspect ratios were produced via three different powder metallurgy methods. Microstructural examination revealed that the CNTs were uniformly dispersed in the materials with a range of aspect ratios from 6.5 to 55. The tensile results showed that the CNTs exhibited a strong strengthening effect in the composites regardless of their aspect ratios. However, the post-loading examination and quantitative analysis indicated that there was a strengthening mechanism transition for CNTs, which was closely associated with the aspect ratio or length of CNTs. The origin of such transition was explored from the viewpoint of dislocation-CNTs interaction under loading. The findings may provide a new insight in understanding the strengthening behaviors of CNT-reinforced MMCs.

AB - In the present work, we studied the effect of the aspect ratio of carbon nanotubes (CNTs) on strengthening aluminum metal matrix composites (Al MMCs). To this end, Al samples reinforced with CNTs of various aspect ratios were produced via three different powder metallurgy methods. Microstructural examination revealed that the CNTs were uniformly dispersed in the materials with a range of aspect ratios from 6.5 to 55. The tensile results showed that the CNTs exhibited a strong strengthening effect in the composites regardless of their aspect ratios. However, the post-loading examination and quantitative analysis indicated that there was a strengthening mechanism transition for CNTs, which was closely associated with the aspect ratio or length of CNTs. The origin of such transition was explored from the viewpoint of dislocation-CNTs interaction under loading. The findings may provide a new insight in understanding the strengthening behaviors of CNT-reinforced MMCs.

KW - Carbon nanotubes (CNTs)

KW - Length effect

KW - Load transfer

KW - Metal matrix composites (MMCs)

KW - Orowan mechanism

KW - Strengthening mechanisms

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DO - 10.1016/j.actamat.2017.08.048

M3 - 文章

AN - SCOPUS:85028510634

SN - 1359-6454

VL - 140

SP - 317

EP - 325

JO - Acta Materialia

JF - Acta Materialia

ER -

Length effect of carbon nanotubes on the strengthening mechanisms in metal matrix composites

Abstract

Keywords

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