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Ultrasonic Evaluation of Low Density Powder Compacts

  • Graham H. Thomas
  • Susan L. Crawford
Chapter

Abstract

Ultrasonic evaluation of powder compacts provides valuable information about the density of the powder and incipient defects in the compact. Since the specimens would be contaminated if they were inspected with traditional immersion or contact techniques, procedures to dry couple or vacuum bag and immerse the powder samples were implemented. With these methods ultrasonic energy was propagated through the powder compacts and the acoustic velocity and attenuation were measured. The ability to immerse the powder samples not only provides consistent coupling but allows scanning which is a valuable tool to image variations and defects in the compacts.

Keywords

Powder Compact Fractional Density Acoustic Energy Acoustic Velocity Sandia National Laboratory 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    J. E. Smugeresky, Sandia National Laboratories, Livermore, California 94551, personal communication.Google Scholar

Copyright information

© Plenum Press, New York 1991

Authors and Affiliations

  • Graham H. Thomas
    • 1
  • Susan L. Crawford
    • 1
  1. 1.Sandia National LaboratoriesLivermoreUSA

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