Abstract

The dynamic indentation behaviors of monolithic silica nanofoams of various porosities are investigated. When the pore size is on the nm scale, as the porosity increases, despite the decrease in mass density, the resistance offered by silica nanofoam to dynamic indentation is maintained at a high level, higher than the resistance of solid silica or regular porous silica. This phenomenon is related to the fast collapse of nanocells, which produces a locally hardened region and significantly increases the volume of material involved in impact energy dissipation.

Details

Title
Effects of porosity on dynamic indentation resistance of silica nanofoam
Author
Zhao, Cang 1   VIAFID ORCID Logo  ; Zhong, Ying 2 ; Yu, Qiao 3 

1  Department of Structural Engineering, University of California – San Diego, La Jolla, CA, USA; X-ray Science Division, Argonne National Laboratory, Argonne, IL, USA 
2  Program of Materials Science and Engineering, University of California – San Diego, La Jolla, CA, USA 
3  Department of Structural Engineering, University of California – San Diego, La Jolla, CA, USA; Program of Materials Science and Engineering, University of California – San Diego, La Jolla, CA, USA 
Pages
1-7
Publication year
2017
Publication date
Apr 2017
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1038/s41598-017-01152-1
ProQuest document ID
1961143118
Copyright
© 2017. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.