Nanoporous gold reinforced with carbon based nanomaterials: A molecular dynamics study

Deniz Ezgi Gulmez, Yunus Onur Yildiz, Mesut Kirca*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

Considering the fact that carbon based nanostructures (CBNs) and nanoporous (np) metals are very promising for future applications, the main motivation of this study is to improve the mechanical characteristics of np metals by employing CBNs including graphene nanoribbons (GNRs), fullerenes and CNTs within the cellular voids by presenting a new metal-carbon nanocomposite material. For this purpose, a Voronoi-based atomistic modeling technique is used to obtain numerical models of the proposed hybrid structures and their mechanical properties under tensile and compressive loading conditions are investigated by classical molecular dynamics. Instead of reinforcing with discrete units, a heat welding procedure is applied to generate a covalently bonded network of carbon based structures. Results clearly indicate that the utilization of carbon based nanostructures enhances both tensile and compressive response of np metals significantly while a minor microstructural change is observed within the crystal structure. The major effect is observed especially on the yield and post-yield behavior of np structures, while the elastic modulus is not affected remarkably. The main reason for the enhancement is greatly attributed to the covalent bonding generated between the CBN units. As an indicator, the np specimen with GNR network presents higher tensile performance compared to the other CBN units due to larger number of covalent bonds. The proposed hybridization can also be evaluated for the enhancement on the thermal and electrochemical performance of the np metals.

Original languageEnglish
Pages (from-to)62-70
Number of pages9
JournalComposites Part B: Engineering
Volume151
DOIs
Publication statusPublished - 15 Oct 2018

Bibliographical note

Publisher Copyright:
© 2018 Elsevier Ltd

Funding

We would like to thank the Scientific and Technological Research Council of Turkey (TUBITAK) (Grant number: 214M638 ) for its financial support.

FundersFunder number
TUBITAK
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu214M638

    Keywords

    • Carbon nanotubes
    • Fullerenes
    • Graphene
    • Mechanical properties
    • Molecular dynamics
    • Nanoporous metals

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