Strengthening effect of single-atomic-layer graphene in metal-graphene nanolayered composites

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Youbin Kim
  • Jinsup Lee
  • Min Sun Yeom
  • Jae Won Shin
  • Hyungjun Kim
  • Yi Cui
  • Jeffrey W. Kysar
  • James Hone
  • Yousung Jung
  • Seung Min Han

Detail(s)

Original languageEnglish
Article number2114
Journal / PublicationNature Communications
Volume4
Online published2 Jul 2013
Publication statusPublished - 2013
Externally publishedYes

Abstract

Graphene is a single-atomic-layer material with excellent mechanical properties and has the potential to enhance the strength of composites. Its two-dimensional geometry, high intrinsic strength and modulus can effectively constrain dislocation motion, resulting in the significant strengthening of metals. Here we demonstrate a new material design in the form of a nanolayered composite consisting of alternating layers of metal (copper or nickel) and monolayer graphene that has ultra-high strengths of 1.5 and 4.0 GPa for copper-graphene with 70-nm repeat layer spacing and nickel-graphene with 100-nm repeat layer spacing, respectively. The ultra-high strengths of these metal-graphene nanolayered structures indicate the effectiveness of graphene in blocking dislocation propagation across the metal-graphene interface. Ex situ and in situ transmission electron microscopy compression tests and molecular dynamics simulations confirm a build-up of dislocations at the graphene interface. 

Citation Format(s)

Strengthening effect of single-atomic-layer graphene in metal-graphene nanolayered composites. / Kim, Youbin; Lee, Jinsup; Yeom, Min Sun et al.
In: Nature Communications, Vol. 4, 2114, 2013.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review