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Depth profiling of coating by laser ultrasonic technique

  • Xue Hang Song
  • , Yong Dong Pan*
  • , Zheng Zhong
  • , Kao Shan Dai
  • *Corresponding author for this work
  • Tongji University

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Functionally graded materials (FGMs) show great potential, and the development of new FGMs will lead to materials that have properties not achievable with homogeneous materials. The dispersion curves of surface acoustic wave propagating in coating structures are investigated using the reflection and transmission coefficient method. It's found that the dispersion curves are sensitive to the transverse wave velocity, but they are not very sensitive to the longitudinal wave velocity and density. Genetic algorithms adopted to handle the inverse problem. The object function is established based on experimental phase velocity and the theoretical one. The reconstructed depth-profiling of material properties agrees well with the experimental ones.

Original languageEnglish
Title of host publicationProceedings of the 2012 Symposium on Piezoelectricity, Acoustic Waves and Device Applications, SPAWDA 2012
Pages322-325
Number of pages4
DOIs
StatePublished - 2012
Externally publishedYes
Event2012 Symposium on Piezoelectricity, Acoustic Waves and Device Applications, SPAWDA 2012 - Shanghai, China
Duration: 23 Nov 201225 Nov 2012

Publication series

NameProceedings of the 2012 Symposium on Piezoelectricity, Acoustic Waves and Device Applications, SPAWDA 2012

Conference

Conference2012 Symposium on Piezoelectricity, Acoustic Waves and Device Applications, SPAWDA 2012
Country/TerritoryChina
CityShanghai
Period23/11/1225/11/12

Keywords

  • Coating
  • Genetic algorithm
  • Inverse problem
  • Laser ultrasonics

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