Microstructure Evolution and Properties Induced by Multi-Pass Drawing of Graphene/Copper Nanocomposite

Abstract

The influence of multi-pass cold drawing on the evolution of microstructure, texture, and properties of Cu matrix composite, reinforced by in situ grown graphene, has been systematically investigated. Under continuous and severe plastic deformation, the grains in the composite were continuously refined to nanoscale. In addition, graphene in the composite could be gradually refined, exfoliated, and redispersed. Interestingly, dynamic recrystallization of the composite was formed after 80% drawing reduction and its formation mechanism was discussed. The texture of the as-drawn composite comprised a mixture of fiber textures with dominated <111> and minor <100> orientation after 99.7% severe drawing reduction. The tensile properties and electrical conductivity of the as-drawn composites were also investigated. This work provides a better guideline on the plastic deformation behavior of the advanced graphene/metal nanocomposite.

The Preparation and Properties of In Situ Grown Oriented Nitrogen-Doped Graphene-like/Copper Composite Materials

“…In contrast to other studies on graphene/copper-based composite materials, no significant graphene-like pulling-out phenomenon was observed on the tensile fracture surface. , Typically, the main failure modes of graphene in composite materials are extraction and fracture, closely linked to the integrity of the graphene structure and interface bonding. It is worth mentioning that individually exposed graphene-like sheets are challenging to discern on the fracture surface of the NGL/Cu composite material.…”

“…Under the combined effects of loading and cold deformation stress, the composite material deforms and fractures along the direction of maximum shear force. 17,47,48 In contrast to other studies on graphene/copper-based composite materials, no significant graphene-like pulling-out phenomenon was observed on the tensile fracture surface. 48,49 Typically, the main failure modes of graphene in composite materials are extraction and fracture, closely linked to the integrity of the graphene structure and interface bonding.…”

“…Simultaneously, the graphene-like shape along the RD direction impedes the propagation of cracks in the TD direction. Under the combined effects of loading and cold deformation stress, the composite material deforms and fractures along the direction of maximum shear force. ,, …”

Microstructure and Properties of a Graphene Reinforced Cu–Cr–Mg Composite

“…This is mainly due to an extra interface between the metal matrix and the reinforcement phase, which scatters the electrons during the electron transport process. It results in a decrease in the mean-free path (MFP) of the electrons [ 26 , 28 ]. For graphene/copper composites, the structural integrity of graphene and the interfacial bonding strength of graphene/copper are important factors affecting the electrical conductivity of the composites.…”