On factors defining the mechanical behavior of nanoporous gold

Molecular dynamics simulations of cold welding of nanoporous amorphous alloys: effects of welding conditions and microstructures

“…It is widely accepted that the mechanical behaviors of nanoporous materials strongly depend on structural characteristics. [72][73][74][75] In this subsection, we study how the solid fraction and ligament size affect the cold welding processes and mechanical responses of the welded NPAAs. Fig.…”

In Situ Study of Nanoporosity Evolution during Dealloying AgAu and CoPd by Grazing-Incidence Small-Angle X-ray Scattering

“…Yet several interesting aspects of dealloyed materials are still subject of contemporary research, such as the structural stability and coarsening behavior of the ensuing nanoporous structures 17 or their mechanical properties. 18 A broad variety of in situ methods have been utilized to study the dealloying process itself, ranging from dilatometry, 19 resistometry, 20 magnetometry, 21 UV–vis spectroscopy, 22 transmission X-ray microscopy (XTM), 23 X-ray diffraction (XRD), 24 − 26 and Raman spectroscopy 27 to real-space imaging techniques such as scanning tunneling microscopy 28 and transmission electron microscopy (TEM). 29 While microscopic techniques, in general, allow the extraction of size information for the nanoporous structures, they suffer from the disadvantage of averaging over a limited sample area only.…”

“…Since Erlebacher devised a microscopic description of the dealloying mechanism based on two simple rate equations for dissolution and surface diffusion, this model has become the scientific consensus that forms the basic understanding of the dealloying process. Yet several interesting aspects of dealloyed materials are still subject of contemporary research, such as the structural stability and coarsening behavior of the ensuing nanoporous structures or their mechanical properties . A broad variety of in situ methods have been utilized to study the dealloying process itself, ranging from dilatometry, resistometry, magnetometry, UV–vis spectroscopy, transmission X-ray microscopy (XTM), X-ray diffraction (XRD), − and Raman spectroscopy to real-space imaging techniques such as scanning tunneling microscopy and transmission electron microscopy (TEM) .…”

Estimation of Nanoporous Au Young’s Modulus from Serial Block Face-SEM 3D-Characterisation

“…Furthermore, the majority of the analyses derive the macroscopic properties from phenomenological models based on internal morphological parameters, such as solid phase volume fraction, characteristic length and thickness of ligament size [ 6 , 7 ] or connectivity [ 8 ], while numerical computations are generally based on Finite Element simulations on representative microstructures, which are assumed to be periodic or numerically randomized [ 8 ], in particular with gyroidal [ 9 ] or spinodal [ 10 ] microgeometries. Alternatively, computationally expensive Molecular Dynamics simulations have been proposed [ 11 ]. More refined descriptions of the microstructure require ad hoc approaches [ 12 ], which are needed to reduce the computational cost [ 10 ].…”