Determination of Rayleigh and Lamb Wave Velocities in Diamond Films using an Acoustic Microscope

  • J. C. Johnson
  • R. B. Thompson
  • Eric E. Jamieson
Chapter

Abstract

Acoustic microscopy is a powerful method of determining acoustic surface wave velocities with high spatial resolution. This paper describes the use of an acoustic microscope to measure these velocities in polycrystalline diamond films. Acoustic waves in diamond have a relatively high velocity and that affects the choice of the lens diameter and focal length. A general guideline will be given to determine the type of lens needed. The velocities measured in three diamond films were found to vary greatly depending on the film thickness. In two of the films it was found that Lamb modes rather than leaky Rayleigh waves were generated. After correcting for the associated dispersion, the measured velocities were found to deviate from the Lamb and Rayleigh velocities calculated from the single crystal elastic constants. The possibility for using these deviations to characterize the films will be discussed.

Keywords

Graphite Hexagonal Nitride 

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References

  1. 1.
    J. Johnson and R.B. Thompson, in Review of Progress in Quantitative NDE, Vol. 12, edited by D.O. Thompson and D.E. Chimenti (Plenum Press, New York, 1993), p. 2121.CrossRefGoogle Scholar
  2. 2.
    J. Johnson and R.B. Thompson, in Review of Progress in Quantitative NDE, Vol. 13, edited by D.O. Thompson and D.E. Chimenti (Plenum Press, New York, 1994), p. 2017.Google Scholar
  3. 3.
    Ivan Amato. in Science News, Vol. 138, (1990), p.72.CrossRefGoogle Scholar
  4. 4.
    K.-H. Hellwege, Landolt and Bernstein: Numerical Data and Functional Relationships in Science and Technology, Group III, Vol. 11, (Springer-Verlog, Berlin, 1979), pg. 9.Google Scholar
  5. 5.
    B. Auld., Acoustic Waves and Fields on Solids, Wiley Interscience, New York, NY, 1973, Ch. 10.Google Scholar
  6. 6.
    W. Voigt, Lerbuch der Kristallphysik, Taubner, Leipzig, 1928.Google Scholar

Copyright information

© Plenum Press, New York 1995

Authors and Affiliations

  • J. C. Johnson
    • 1
  • R. B. Thompson
    • 1
  • Eric E. Jamieson
    • 2
  1. 1.Center for NDEIowa State UniversityAmesUSA
  2. 2.Kansas City DivisionAllied-Signal Aerospace CompanyKansas CityUSA

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