Nanoporous metals are a class of novel nanomaterials with potential applications in many fields such as sensing, catalysis, and fuel cells. The present paper is aimed to investigate atomic mechanisms associated with the uniaxial tensile deformation behavior of nanoporous gold. A phase field method is adopted to generate the bicontinuous open-cell porous microstructure of the material. Molecular dynamics simulations then reveal that the uniaxial tensile deformation in such porous materials is accompanied by an accumulation of stacking faults in ligaments along the loading direction and their junctions with neighboring ligaments, as well as the formation of Lomer–Cottrell locks at such junctions. The tensile strain leads to progressive necking and rupture of some ligaments, ultimately resulting in failure of the material. The simulation results also suggest scaling laws for the effective Young's modulus, yield stress, and ultimate strength as functions of the relative mass density and average ligament size in the material.
Skip Nav Destination
Article navigation
14 January 2013
Research Article|
January 10 2013
Mechanical properties and scaling laws of nanoporous gold
Xiao-Yu Sun;
Xiao-Yu Sun
1
AML and CMM, Department of Engineering Mechanics, Tsinghua University
, Beijing 100084, China
Search for other works by this author on:
Guang-Kui Xu;
Guang-Kui Xu
1
AML and CMM, Department of Engineering Mechanics, Tsinghua University
, Beijing 100084, China
Search for other works by this author on:
Xiaoyan Li;
Xiaoyan Li
2
School of Engineering, Brown University
, Providence, Rhode Island 02912, USA
Search for other works by this author on:
Xi-Qiao Feng;
Xi-Qiao Feng
a)
1
AML and CMM, Department of Engineering Mechanics, Tsinghua University
, Beijing 100084, China
Search for other works by this author on:
Huajian Gao
Huajian Gao
2
School of Engineering, Brown University
, Providence, Rhode Island 02912, USA
Search for other works by this author on:
a)
Author to whom correspondence should be addressed. Electronic mail: [email protected].
J. Appl. Phys. 113, 023505 (2013)
Article history
Received:
June 21 2012
Accepted:
December 17 2012
Citation
Xiao-Yu Sun, Guang-Kui Xu, Xiaoyan Li, Xi-Qiao Feng, Huajian Gao; Mechanical properties and scaling laws of nanoporous gold. J. Appl. Phys. 14 January 2013; 113 (2): 023505. https://doi.org/10.1063/1.4774246
Download citation file:
Pay-Per-View Access
$40.00
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Citing articles via
A step-by-step guide to perform x-ray photoelectron spectroscopy
Grzegorz Greczynski, Lars Hultman
Piezoelectric thin films and their applications in MEMS: A review
Jinpeng Liu, Hua Tan, et al.
Tutorial: Simulating modern magnetic material systems in mumax3
Jonas J. Joos, Pedram Bassirian, et al.
Related Content
Microscopic failure behavior of nanoporous gold
Appl. Phys. Lett. (September 2005)
Ligament and joint sizes govern softening in nanoporous aluminum
Appl. Phys. Lett. (January 2011)
Effects of ultrathin coating on the tensile behavior of nanoporous gold
J. Appl. Phys. (August 2017)
On the scaling behavior of hardness with ligament diameter of nanoporous-Au: Constrained motion of dislocations along the ligaments
Appl. Phys. Lett. (June 2014)
Dynamic response and failure analysis of nanoporous Al plate under compression and stretching
AIP Advances (November 2024)