Real-Time Monitoring of Ceramic Sintering with Laser Ultrasonics

  • K. L. Telschow

Summary

A Fabry-Perot Doppler interferometer that directly measures elastic waves from rough, optically diffuse, surfaces of materials has been constructed at the Idaho National Engineering Laboratory (INEL). This apparatus, coupled with a pulsed laser for elastic wave generation, is currently being used for real-time monitoring of the sintering of zinc oxide. From the ultrasonic propagation measurements, actual densities and shrinkage values can be calculated as the material sinters; the algorithm requires previous knowledge of the ultrasonic velocity dependence on density and assumptions concerning the method of shrinkage in the material.

Keywords

Zinc Oxide Ultrasonic Velocity Thermoelastic Generation Ultrasonic Wave Velocity Longitudinal Ultrasonic Wave 
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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    K. L, Telschow, J. B. Walter, G. V. Garcia and D. C. Kunerth, “Process Monitoring using Optical Ultrasonic Wave Detection,” Review of Quantitative Nondestructive Evaluation. Vol. 9, D. O. Thompson and D. C. Chimenti eds., Plenum Press, New York, (1990), to be published.Google Scholar
  2. 2.
    K. L. Telschow, J. B. Walter, and G. V. Garcia, “Laser Ultrasonic Monitoring of Ceramic Sintering,” in preparation.Google Scholar
  3. 3.
    D. A. Hutchins, “Ultrasonic Generation by Pulsed Lasers,” Physical Acoustics, vol. XVIII, W. P. Mason editor (Academic Press, N. Y., 1988), 21–123.Google Scholar
  4. 4.
    K. L. Telschow and R. J. Conant, “Optical Parameter Effects on Laser Generated Ultrasound for Microstructure Characterization,” Nondestructive Materials Characterization, P. Holler, V. Hauk, G. Dobmann, C. O. Ruud and R. E. Green eds., (Springer-Verlag, N. Y., 1989), 799–806.CrossRefGoogle Scholar
  5. 5.
    K. L. Telschow and R. J. Conant, “Optical and Thermal Parameter Effects on Laser Generated Ultrasound,” To be published in J. Acoust. Soc. Am. (1990).Google Scholar
  6. 6.
    J.-P. Monchalin and R. Heron, “Laser Ultrasonic Generation and Detection with a Confocal Fabry-Perot Interferometer,” Materials Evaluation, 44, 1231 (1986).Google Scholar
  7. 7.
    R. A. Roberts, “Ultrasonic NDE of Green-State Ceramics by Focused Through-Transmission,” Review of Quantitative Nondestructive Evaluation. Vol. 6B, D. O. Thompson and D. C. Chimenti eds., Plenum Press, New York, 1443 (1987).CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1991

Authors and Affiliations

  • K. L. Telschow
    • 1
  1. 1.Idaho National Engineering LaboratoryEG&G Idaho, Inc.Idaho FallsUSA

Personalised recommendations