Strengthening behavior of few-layered graphene/aluminum composites

Seeun Shin, Donghyun Bae

Research output: Contribution to conferencePaper

Abstract

Strengthening behaviour of composite containing discontinuous reinforcement is strongly related with load transfer at the reinforcement-matrix interface. Few-layer graphene (FLG) as a reinforcing agent and aluminum (Al) as a matrix are selected, respectively. By varying a volume fraction of the FLG, Al matrix composites were produced by a powder metallurgy method. Uniform dispersion and uniaxial alignment of FLG in the Al matrix are evidenced by high-resolution transmission electron microscope analysis. The composite with only an addition of 0.7 volume fraction of FLG exhibits ~440 MPa of tensile strength. To investigate strengthening behaviour of the composite containing discontinuous reinforcement, multi-walled carbon nanotube (MWCNT) and FLG reinforced Al matrix composites are compared. In terms of load transfer, surface area of the reinforcement is significantly important, although the reinforcements have a similar molecular structure, FLG has a 12.8 times larger specific surface area per volume more than MWCNT due to geometric difference. Therefore an increment of a yield stress versus a reinforcement volume fraction for FLG shows 3.5 times higher than that of MWCNT. Consequently, for both reinforcements, the composite strength proportionally increases with the specific surface area on the composite.

Original languageEnglish
Publication statusPublished - 2015
Event20th International Conference on Composite Materials, ICCM 2015 - Copenhagen, Denmark
Duration: 2015 Jul 192015 Jul 24

Other

Other20th International Conference on Composite Materials, ICCM 2015
CountryDenmark
CityCopenhagen
Period15/7/1915/7/24

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Ceramics and Composites

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