Understanding the Interdependence of Penetration Depth and Deformation on Nanoindentation of Nanoporous Silver

A silver-based nanoporous material was produced by dealloying (selective chemical etching) of an Ag38.75Cu38.75Si22.5 crystalline alloy. Composed of connected ligaments, this material was imaged using a scanning electron microscope (SEM) and focused ion-beam (FIB) scanning electron microscope tomogr...

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Published in:Metals (Basel ) 2019-12, Vol.9 (12), p.1346
Main Authors: Champion, Yannick, Laurent-Brocq, Mathilde, Lhuissier, Pierre, Charlot, Frédéric, Moreira Jorge Junior, Alberto, Barsuk, Daria
Format: Article
Language:English
Subjects:
Alloys
Chemical etching
Chemical Sciences
Densification
Experiments
Ion beams
Material chemistry
Mechanical properties
Morphology
Nanoindentation
Penetration depth
Porosity
Silver
Solids
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creator Champion, Yannick
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description A silver-based nanoporous material was produced by dealloying (selective chemical etching) of an Ag38.75Cu38.75Si22.5 crystalline alloy. Composed of connected ligaments, this material was imaged using a scanning electron microscope (SEM) and focused ion-beam (FIB) scanning electron microscope tomography. Its mechanical behavior was evaluated using nanoindentation and found to be heterogeneous, with density variation over a length scale of a few tens of nanometers, similar to the indent size. This technique proved relevant to the investigation of a material’s mechanical strength, as well as to how its behavior related to the material’s microstructure. The hardness is recorded as a function of the indent depth and a phenomenological description based on strain gradient and densification kinetic was proposed to describe the resultant depth dependence.
doi_str_mv 10.3390/met9121346
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subjects Alloys
Chemical etching
Chemical Sciences
Densification
Experiments
Ion beams
Material chemistry
Mechanical properties
Morphology
Nanoindentation
Penetration depth
Porosity
Silver
Solids
title Understanding the Interdependence of Penetration Depth and Deformation on Nanoindentation of Nanoporous Silver
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