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Graphene Surface Reinforcement of Iron

Graphene is an ideal material in the reinforcement of metal-matrix composites owing to its outstanding mechanical and physical properties. Herein, we have investigated the surface enhancement of iron via a computational nanoindentation process using molecular dynamics simulations. The findings of ou...

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Detalles Bibliográficos
Autores principales: Wang, Pengjie, Cao, Qiang, Yan, Yuping, Nie, Yangtian, Liu, Sheng, Peng, Qing
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6358947/
https://www.ncbi.nlm.nih.gov/pubmed/30621130
http://dx.doi.org/10.3390/nano9010059
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author Wang, Pengjie
Cao, Qiang
Yan, Yuping
Nie, Yangtian
Liu, Sheng
Peng, Qing
author_facet Wang, Pengjie
Cao, Qiang
Yan, Yuping
Nie, Yangtian
Liu, Sheng
Peng, Qing
author_sort Wang, Pengjie
collection PubMed
description Graphene is an ideal material in the reinforcement of metal-matrix composites owing to its outstanding mechanical and physical properties. Herein, we have investigated the surface enhancement of iron via a computational nanoindentation process using molecular dynamics simulations. The findings of our study show that graphene can enhance the critical yield strength, hardness and elastic modulus of the composite to different degrees with the change of the number of graphene layers. In the six tested models, the composite with trilayer graphene on the surface produces the strongest reinforcement, with an increased magnitude of 432.1% and 169.5% in the hardness and elastic modulus, respectively, compared with pure iron. Furthermore, it is revealed that high temperature could weaken the elastic bearing capacity of the graphene, resulting in a decrease on the elastic mechanical properties of the graphene/Fe composite.
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spelling pubmed-63589472019-02-06 Graphene Surface Reinforcement of Iron Wang, Pengjie Cao, Qiang Yan, Yuping Nie, Yangtian Liu, Sheng Peng, Qing Nanomaterials (Basel) Article Graphene is an ideal material in the reinforcement of metal-matrix composites owing to its outstanding mechanical and physical properties. Herein, we have investigated the surface enhancement of iron via a computational nanoindentation process using molecular dynamics simulations. The findings of our study show that graphene can enhance the critical yield strength, hardness and elastic modulus of the composite to different degrees with the change of the number of graphene layers. In the six tested models, the composite with trilayer graphene on the surface produces the strongest reinforcement, with an increased magnitude of 432.1% and 169.5% in the hardness and elastic modulus, respectively, compared with pure iron. Furthermore, it is revealed that high temperature could weaken the elastic bearing capacity of the graphene, resulting in a decrease on the elastic mechanical properties of the graphene/Fe composite. MDPI 2019-01-04 /pmc/articles/PMC6358947/ /pubmed/30621130 http://dx.doi.org/10.3390/nano9010059 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wang, Pengjie
Cao, Qiang
Yan, Yuping
Nie, Yangtian
Liu, Sheng
Peng, Qing
Graphene Surface Reinforcement of Iron
title Graphene Surface Reinforcement of Iron
title_full Graphene Surface Reinforcement of Iron
title_fullStr Graphene Surface Reinforcement of Iron
title_full_unstemmed Graphene Surface Reinforcement of Iron
title_short Graphene Surface Reinforcement of Iron
title_sort graphene surface reinforcement of iron
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6358947/
https://www.ncbi.nlm.nih.gov/pubmed/30621130
http://dx.doi.org/10.3390/nano9010059
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AT liusheng graphenesurfacereinforcementofiron
AT pengqing graphenesurfacereinforcementofiron