Oxidation-assisted ductility of aluminium nanowires

Fatih G. Sen, Ahmet T. Alpas, Adri C T Van Duin, Yue Qi

Research output: Contribution to journalArticle

  • 15 Citations

Abstract

Oxidation can drastically change mechanical properties of nanostructures that typically have large surface-to-volume ratios. However, the underlying mechanisms describing the effect oxidation has on the mechanical properties of nanostructures have yet to be characterized. Here we use reactive molecular dynamics and show that the oxidation enhances the aluminium nanowire ductility, and the oxide shell exhibits superplastic behaviour. The oxide shell decreases the aluminium dislocation nucleation stress by increasing the activation volume and the number of nucleation sites. Superplasticity of the amorphous oxide shell is due to viscous flow as a result of healing of the broken aluminium-oxygen bonds by oxygen diffusion, below a critical strain rate. The interplay between the strain rate and oxidation rate is not only essential for designing nanodevices in ambient environments, but also controls interface properties in large-scale deformation processes.

LanguageEnglish (US)
Article number3959
JournalNature Communications
Volume5
DOIs
StatePublished - Jun 2 2014

Profile

Nanowires
Aluminum
ductility
Oxides
Ductility
nanowires
Nanostructures
aluminum
Oxidation
oxidation
Oxygen
strain rate
oxides
Strain rate
Nucleation
nucleation
mechanical properties
Molecular Dynamics Simulation
superplasticity
Mechanical properties

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Chemistry(all)
  • Physics and Astronomy(all)

Cite this

Sen, F. G., Alpas, A. T., Van Duin, A. C. T., & Qi, Y. (2014). Oxidation-assisted ductility of aluminium nanowires. Nature Communications, 5, [3959]. DOI: 10.1038/ncomms4959

Oxidation-assisted ductility of aluminium nanowires. / Sen, Fatih G.; Alpas, Ahmet T.; Van Duin, Adri C T; Qi, Yue.

In: Nature Communications, Vol. 5, 3959, 02.06.2014.

Research output: Contribution to journalArticle

Sen FG, Alpas AT, Van Duin ACT, Qi Y. Oxidation-assisted ductility of aluminium nanowires. Nature Communications. 2014 Jun 2;5. 3959. Available from, DOI: 10.1038/ncomms4959
Sen, Fatih G. ; Alpas, Ahmet T. ; Van Duin, Adri C T ; Qi, Yue. / Oxidation-assisted ductility of aluminium nanowires. In: Nature Communications. 2014 ; Vol. 5.
@article{97923b2e96e246179c8f769539b3d458,
title = "Oxidation-assisted ductility of aluminium nanowires",
abstract = "Oxidation can drastically change mechanical properties of nanostructures that typically have large surface-to-volume ratios. However, the underlying mechanisms describing the effect oxidation has on the mechanical properties of nanostructures have yet to be characterized. Here we use reactive molecular dynamics and show that the oxidation enhances the aluminium nanowire ductility, and the oxide shell exhibits superplastic behaviour. The oxide shell decreases the aluminium dislocation nucleation stress by increasing the activation volume and the number of nucleation sites. Superplasticity of the amorphous oxide shell is due to viscous flow as a result of healing of the broken aluminium-oxygen bonds by oxygen diffusion, below a critical strain rate. The interplay between the strain rate and oxidation rate is not only essential for designing nanodevices in ambient environments, but also controls interface properties in large-scale deformation processes.",
author = "Sen, {Fatih G.} and Alpas, {Ahmet T.} and {Van Duin}, {Adri C T} and Yue Qi",
year = "2014",
month = "6",
day = "2",
doi = "10.1038/ncomms4959",
language = "English (US)",
volume = "5",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Nature Publishing Group",

}

TY - JOUR

T1 - Oxidation-assisted ductility of aluminium nanowires

AU - Sen,Fatih G.

AU - Alpas,Ahmet T.

AU - Van Duin,Adri C T

AU - Qi,Yue

PY - 2014/6/2

Y1 - 2014/6/2

N2 - Oxidation can drastically change mechanical properties of nanostructures that typically have large surface-to-volume ratios. However, the underlying mechanisms describing the effect oxidation has on the mechanical properties of nanostructures have yet to be characterized. Here we use reactive molecular dynamics and show that the oxidation enhances the aluminium nanowire ductility, and the oxide shell exhibits superplastic behaviour. The oxide shell decreases the aluminium dislocation nucleation stress by increasing the activation volume and the number of nucleation sites. Superplasticity of the amorphous oxide shell is due to viscous flow as a result of healing of the broken aluminium-oxygen bonds by oxygen diffusion, below a critical strain rate. The interplay between the strain rate and oxidation rate is not only essential for designing nanodevices in ambient environments, but also controls interface properties in large-scale deformation processes.

AB - Oxidation can drastically change mechanical properties of nanostructures that typically have large surface-to-volume ratios. However, the underlying mechanisms describing the effect oxidation has on the mechanical properties of nanostructures have yet to be characterized. Here we use reactive molecular dynamics and show that the oxidation enhances the aluminium nanowire ductility, and the oxide shell exhibits superplastic behaviour. The oxide shell decreases the aluminium dislocation nucleation stress by increasing the activation volume and the number of nucleation sites. Superplasticity of the amorphous oxide shell is due to viscous flow as a result of healing of the broken aluminium-oxygen bonds by oxygen diffusion, below a critical strain rate. The interplay between the strain rate and oxidation rate is not only essential for designing nanodevices in ambient environments, but also controls interface properties in large-scale deformation processes.

UR - http://www.scopus.com/inward/record.url?scp=84901917360&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84901917360&partnerID=8YFLogxK

U2 - 10.1038/ncomms4959

DO - 10.1038/ncomms4959

M3 - Article

VL - 5

JO - Nature Communications

T2 - Nature Communications

JF - Nature Communications

SN - 2041-1723

M1 - 3959

ER -