Relating the strength of graphene/metal composites to the graphene orientation and position

Fei Shuang, Katerina E. Aifantis

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

This letter presents new insight on the underlying strengthening mechanisms that take place during deformation of iron-graphene (Fe/Gr) composites. Molecular dynamics revealed that the Gr orientation dictated the dislocation evolution during compression, revealing three possible dislocation-Gr interaction mechanisms: transmission, reflection and gliding. A new numerical materials design was therefore proposed of a lamellae Fe-Gr structure with a short graphene sheet inserted in Fe, whose orientation resulted in reflection. Decreasing the distance between the long and short Gr-sheets resulted in the stronger composites. This method can be used for predicting the properties of graphene reinforced composites based on the Gr structure.

Original languageEnglish (US)
Pages (from-to)70-75
Number of pages6
JournalScripta Materialia
Volume181
DOIs
StatePublished - May 2020
Externally publishedYes

Keywords

  • Dislocations
  • Graphene
  • Molecular dynamics

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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