Elastic characterization of nanoporous gold foams using laser based ultrasonics

Phillip Ahn; Oluwaseyi Balogun

doi:10.1016/j.ultras.2013.10.004

Elastic characterization of nanoporous gold foams using laser based ultrasonics

Phillip Ahn, Oluwaseyi Balogun^*

^*Corresponding author for this work

Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

12 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 language	English (US)
Pages (from-to)	795-800
Number of pages	6
Journal	Ultrasonics
Volume	54
Issue number	3
DOIs	https://doi.org/10.1016/j.ultras.2013.10.004
State	Published - Mar 2014

Keywords

Laser based ultrasonics
Nanoporous foams
Nondestructive testing
Zero group velocity resonance

ASJC Scopus subject areas

Acoustics and Ultrasonics

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10.1016/j.ultras.2013.10.004

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title = "Elastic characterization of nanoporous gold foams using laser based ultrasonics",

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.",

keywords = "Laser based ultrasonics, Nanoporous foams, Nondestructive testing, Zero group velocity resonance",

author = "Phillip Ahn and Oluwaseyi Balogun",

note = "Funding Information: This work was supported in part by the National Science Foundation under Grant No. CMMI 1301574 .",

year = "2014",

month = mar,

doi = "10.1016/j.ultras.2013.10.004",

language = "English (US)",

volume = "54",

pages = "795--800",

journal = "Ultrasonics",

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publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Elastic characterization of nanoporous gold foams using laser based ultrasonics

AU - Ahn, Phillip

AU - Balogun, Oluwaseyi

N1 - Funding Information: This work was supported in part by the National Science Foundation under Grant No. CMMI 1301574 .

PY - 2014/3

Y1 - 2014/3

N2 - 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.

AB - 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.

KW - Laser based ultrasonics

KW - Nanoporous foams

KW - Nondestructive testing

KW - Zero group velocity resonance

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JO - Ultrasonics

JF - Ultrasonics

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ER -

Elastic characterization of nanoporous gold foams using laser based ultrasonics

Abstract

Keywords

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