Elastic characterization of nanoporous gold foams using laser based ultrasonics

Phillip Ahn, Oluwaseyi Balogun*

*Corresponding author for this work

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

A resonance based laser ultrasonics technique is explored for the characterization of low density nanoporous gold foams. Laser generated zero group velocity (ZGV) lamb waves are measured in the foams using a Michelson interferometer. The amplitude spectra obtained from the processed time-domain data are analyzed using a theoretical model from which the foam Young's modulus and Poisson's ratio are obtained. The technique is non-contact and nondestructive, and the ZGV resonance modes are spatially localized, allowing for spatial mapping of the bulk sample properties. The technique may be suitable for process control monitoring and mechanical characterization of low density nanoporous structures.

Original languageEnglish (US)
Pages (from-to)795-800
Number of pages6
JournalUltrasonics
Volume54
Issue number3
DOIs
StatePublished - Mar 1 2014

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Keywords

  • Laser based ultrasonics
  • Nanoporous foams
  • Nondestructive testing
  • Zero group velocity resonance

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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