Laser generation of ultrasound in films and coatings

T. W. Murray; Sridhar Krishnaswamy; Jan Drewes Achenbach

doi:10.1063/1.124161

Laser generation of ultrasound in films and coatings

T. W. Murray^*, Sridhar Krishnaswamy, Jan Drewes Achenbach

^*Corresponding author for this work

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

64 Scopus citations

Abstract

A model for the pulsed laser generation of ultrasound in an isotropic film on a semi-infinite substrate is presented. The model gives the time domain displacement of the system as a function of the density and mechanical properties of the film and substrate and the thermal properties of the film. The model has been verified experimentally using a 1 ns Nd:YAG laser source for acoustic wave generation and a stabilized Michelson interferometer for detection. Experimental and theoretical signals agree well for both the case of a fast layer on a slow substrate (zirconium nitride/steel) and a slow layer on a fast substrate (titanium/aluminum).

Original language	English (US)
Pages (from-to)	3561-3563
Number of pages	3
Journal	Applied Physics Letters
Volume	74
Issue number	23
DOIs	https://doi.org/10.1063/1.124161
State	Published - Jun 7 1999

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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abstract = "A model for the pulsed laser generation of ultrasound in an isotropic film on a semi-infinite substrate is presented. The model gives the time domain displacement of the system as a function of the density and mechanical properties of the film and substrate and the thermal properties of the film. The model has been verified experimentally using a 1 ns Nd:YAG laser source for acoustic wave generation and a stabilized Michelson interferometer for detection. Experimental and theoretical signals agree well for both the case of a fast layer on a slow substrate (zirconium nitride/steel) and a slow layer on a fast substrate (titanium/aluminum).",

author = "Murray, {T. W.} and Sridhar Krishnaswamy and Achenbach, {Jan Drewes}",

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AU - Krishnaswamy, Sridhar

AU - Achenbach, Jan Drewes

PY - 1999/6/7

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N2 - A model for the pulsed laser generation of ultrasound in an isotropic film on a semi-infinite substrate is presented. The model gives the time domain displacement of the system as a function of the density and mechanical properties of the film and substrate and the thermal properties of the film. The model has been verified experimentally using a 1 ns Nd:YAG laser source for acoustic wave generation and a stabilized Michelson interferometer for detection. Experimental and theoretical signals agree well for both the case of a fast layer on a slow substrate (zirconium nitride/steel) and a slow layer on a fast substrate (titanium/aluminum).

AB - A model for the pulsed laser generation of ultrasound in an isotropic film on a semi-infinite substrate is presented. The model gives the time domain displacement of the system as a function of the density and mechanical properties of the film and substrate and the thermal properties of the film. The model has been verified experimentally using a 1 ns Nd:YAG laser source for acoustic wave generation and a stabilized Michelson interferometer for detection. Experimental and theoretical signals agree well for both the case of a fast layer on a slow substrate (zirconium nitride/steel) and a slow layer on a fast substrate (titanium/aluminum).

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Laser generation of ultrasound in films and coatings

Abstract

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