Relating the strength of graphene/metal composites to the graphene orientation and position. (May 2020)

• Record Type: Journal Article
• Authors: Shuang, Fei; Aifantis, Katerina E.
• Is Part Of: Scripta materialia. Number 181(2020)
• Page Start: 70
• Page End: 75
• Publication Date: 2020-05
• Subjects: Graphene -- Dislocations -- Molecular dynamics; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.02.014
• Languages: English
• ISSNs: 1359-6462

Abstract

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. Graphical abstract: Image, graphical abstract