Mechanical properties of Cu nanowires: Effects of cross-sectional area and temperature

Hui Cao; Zhiyuan Rui; Fuqian Yang

doi:10.1016/j.msea.2020.139644

Mechanical properties of Cu nanowires: Effects of cross-sectional area and temperature

Hui Cao, Zhiyuan Rui, Fuqian Yang

Chemical and Materials Engineering

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

Nanostructured materials likely exhibit different mechanical properties from the corresponding bulk materials and have potential applications in a variety of areas. In this work, we use molecular dynamics simulation with embedded-atom potential to investigate the dependence of the mechanical properties of Cu nanowires of square cross-section, including Young's modulus, yield stress and surface force, on cross-sectional area and temperature for the Cu nanowires with cross-sectional areas in a range of 13.1 to 117.6 nm² in a temperature range of 100 to 500 K. The simulation results reveal that the Young's modulus increases with the increase of the cross-sectional area at the same temperature and decreases with the increase of temperature for the same cross-sectional area. The yield stress decreases with the increase of the cross-sectional area at the same temperature in the range of 100 to 400 K and increases with the increase of the cross-sectional area at 500 K, while it decreases with the increase of temperature for the same cross-sectional area. The surface force decreases with the increase of the cross-sectional area at the same temperature and with the increase of temperature for the same cross-sectional area. Semi-empirical expressions relating the mechanical properties to temperature are proposed. Using the semi-empirical expressions, the Young's modulus at 0 K is found to decrease with the decrease of the cross-sectional area, and the yield stress at 0 K is found to decrease linearly with the increase of the cross-sectional area.

Original language	English
Article number	139644
Journal	Materials Science and Engineering A
Volume	791
DOIs	https://doi.org/10.1016/j.msea.2020.139644
State	Published - Jul 22 2020

Bibliographical note

Funding Information:
ZR is grateful for the support of the National Natural Science Foundation of China (Grant No. 51865027 ), and HC is grateful for the support through the Doctoral Research Foundation and the Abroad Exchange Fund of Outstanding Students of Lanzhou University of Technology.

Publisher Copyright:
© 2020 Elsevier B.V.

Keywords

Cross-sectional area
Cu nanowires
Mechanical properties
Molecular dynamics simulation
Temperature

ASJC Scopus subject areas

Materials Science (all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.msea.2020.139644

Cite this

@article{06222614d7f140b891f7ce4e645f3c0f,

title = "Mechanical properties of Cu nanowires: Effects of cross-sectional area and temperature",

abstract = "Nanostructured materials likely exhibit different mechanical properties from the corresponding bulk materials and have potential applications in a variety of areas. In this work, we use molecular dynamics simulation with embedded-atom potential to investigate the dependence of the mechanical properties of Cu nanowires of square cross-section, including Young's modulus, yield stress and surface force, on cross-sectional area and temperature for the Cu nanowires with cross-sectional areas in a range of 13.1 to 117.6 nm2 in a temperature range of 100 to 500 K. The simulation results reveal that the Young's modulus increases with the increase of the cross-sectional area at the same temperature and decreases with the increase of temperature for the same cross-sectional area. The yield stress decreases with the increase of the cross-sectional area at the same temperature in the range of 100 to 400 K and increases with the increase of the cross-sectional area at 500 K, while it decreases with the increase of temperature for the same cross-sectional area. The surface force decreases with the increase of the cross-sectional area at the same temperature and with the increase of temperature for the same cross-sectional area. Semi-empirical expressions relating the mechanical properties to temperature are proposed. Using the semi-empirical expressions, the Young's modulus at 0 K is found to decrease with the decrease of the cross-sectional area, and the yield stress at 0 K is found to decrease linearly with the increase of the cross-sectional area.",

keywords = "Cross-sectional area, Cu nanowires, Mechanical properties, Molecular dynamics simulation, Temperature",

author = "Hui Cao and Zhiyuan Rui and Fuqian Yang",

note = "Funding Information: ZR is grateful for the support of the National Natural Science Foundation of China (Grant No. 51865027 ), and HC is grateful for the support through the Doctoral Research Foundation and the Abroad Exchange Fund of Outstanding Students of Lanzhou University of Technology. Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2020",

month = jul,

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doi = "10.1016/j.msea.2020.139644",

language = "English",

volume = "791",

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T1 - Mechanical properties of Cu nanowires

T2 - Effects of cross-sectional area and temperature

AU - Cao, Hui

AU - Rui, Zhiyuan

AU - Yang, Fuqian

N1 - Funding Information: ZR is grateful for the support of the National Natural Science Foundation of China (Grant No. 51865027 ), and HC is grateful for the support through the Doctoral Research Foundation and the Abroad Exchange Fund of Outstanding Students of Lanzhou University of Technology. Publisher Copyright: © 2020 Elsevier B.V.

PY - 2020/7/22

Y1 - 2020/7/22

N2 - Nanostructured materials likely exhibit different mechanical properties from the corresponding bulk materials and have potential applications in a variety of areas. In this work, we use molecular dynamics simulation with embedded-atom potential to investigate the dependence of the mechanical properties of Cu nanowires of square cross-section, including Young's modulus, yield stress and surface force, on cross-sectional area and temperature for the Cu nanowires with cross-sectional areas in a range of 13.1 to 117.6 nm2 in a temperature range of 100 to 500 K. The simulation results reveal that the Young's modulus increases with the increase of the cross-sectional area at the same temperature and decreases with the increase of temperature for the same cross-sectional area. The yield stress decreases with the increase of the cross-sectional area at the same temperature in the range of 100 to 400 K and increases with the increase of the cross-sectional area at 500 K, while it decreases with the increase of temperature for the same cross-sectional area. The surface force decreases with the increase of the cross-sectional area at the same temperature and with the increase of temperature for the same cross-sectional area. Semi-empirical expressions relating the mechanical properties to temperature are proposed. Using the semi-empirical expressions, the Young's modulus at 0 K is found to decrease with the decrease of the cross-sectional area, and the yield stress at 0 K is found to decrease linearly with the increase of the cross-sectional area.

AB - Nanostructured materials likely exhibit different mechanical properties from the corresponding bulk materials and have potential applications in a variety of areas. In this work, we use molecular dynamics simulation with embedded-atom potential to investigate the dependence of the mechanical properties of Cu nanowires of square cross-section, including Young's modulus, yield stress and surface force, on cross-sectional area and temperature for the Cu nanowires with cross-sectional areas in a range of 13.1 to 117.6 nm2 in a temperature range of 100 to 500 K. The simulation results reveal that the Young's modulus increases with the increase of the cross-sectional area at the same temperature and decreases with the increase of temperature for the same cross-sectional area. The yield stress decreases with the increase of the cross-sectional area at the same temperature in the range of 100 to 400 K and increases with the increase of the cross-sectional area at 500 K, while it decreases with the increase of temperature for the same cross-sectional area. The surface force decreases with the increase of the cross-sectional area at the same temperature and with the increase of temperature for the same cross-sectional area. Semi-empirical expressions relating the mechanical properties to temperature are proposed. Using the semi-empirical expressions, the Young's modulus at 0 K is found to decrease with the decrease of the cross-sectional area, and the yield stress at 0 K is found to decrease linearly with the increase of the cross-sectional area.

KW - Cross-sectional area

KW - Cu nanowires

KW - Mechanical properties

KW - Molecular dynamics simulation

KW - Temperature

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Mechanical properties of Cu nanowires: Effects of cross-sectional area and temperature

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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