Journal of Materials Science

, Volume 29, Issue 9, pp 2297–2303 | Cite as

An acousto-ultrasonic study of the effect of porosity on a sintered glass system

  • B. O. Aduda
  • R. D. Rawlings


An assessment of the applicability of an acousto-ultrasonic (AU) technique for the monitoring of porous ceramic systems has been carried out. Sintered glass was used as a model system and it was found that the AU parameters, such as normalized ringdown count, normalized pulse width, velocity and frequency interval (Δf) between adjacent peaks in the frequency spectra, decrease with increasing porosity. The porosity dependence of the normalized AU parameters has been attributed to attenuation which analysis showed depended on the pore size and content. The velocity and frequency interval changes also depended on pore content but, unlike the normalized parameters, were found to be sensitive to pore shape and size. The decreasing Δf with increasing porosity was explained in terms of the longer path lengths traversed by the waves in the higher pore-density samples.


Porosity Attenuation Path Length Pulse Width Frequency Spectrum 
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.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    K. K. Phani and N. R. Bose, J. Mater. Sci. 21 (1986) 3633.CrossRefGoogle Scholar
  2. 2.
    M. T. Kiernan and J. C. Duke, Mater. Eval. 46 (1988) 1105.Google Scholar
  3. 3.
    R. Talreja, in “Acousto-ultrasonics Theory and Applications”, edited by J. C. Duke (Plenum, New York, 1988) p. 177.CrossRefGoogle Scholar
  4. 4.
    A. Vary and R. F. Lark, J. Test. Eval. 7 (1979) 185.CrossRefGoogle Scholar
  5. 5.
    J. C. Duke, E. G. Henneke, M. T. Kiernan and P. P. Grosskopf, “A study of the Stress Wave Factor Technique for Evaluation of Composite Materials”, NASA Contractor Report 4195, Grant NAG3-172 (NASA, 1989).Google Scholar
  6. 6.
    J. C. Duke (ed.) “Acousto-ultrasonics Theory and Applications”, (Plenum, New York, 1988).Google Scholar
  7. 7.
    A. De, K. K. Phani and S. Kumar, J. Mater. Sci. Lett. 6 (1987) 17.CrossRefGoogle Scholar
  8. 8.
    K. K. Phani, S. S. Niyogi, A. K. Maitra and M. Roychaudhary, J. Mater. Sci. 21 (1986) 4335.CrossRefGoogle Scholar
  9. 9.
    I. Thompson and R. D. Rawlings, ibid. 26 (1991) 4534.CrossRefGoogle Scholar
  10. 10.
    E. E. Underwood, A. R. Colcord and R. C. Waugh, in “Ceramic Microstructures, their Analysis, Significance and Production”, edited by R. M. Fulrath and J. A. Pask (Wiley, New York, 1968) p. 25.Google Scholar
  11. 11.
    R. Truel, C. Elbaum and B. B. Chick, “Ultrasonic Methods in Solid State Physics” (Academic, New York, 1969) p. 172.Google Scholar
  12. 12.
    J. Lefebvre, J. Frohly, R. Torguet, C. Bruneel and J. M. Rouvaen, Ultrasonics 18 (July 1980) 170.CrossRefGoogle Scholar
  13. 13.
    L. Coronel, J. P. Jernot and F. Osterstock, J. Mater. Sci. 25 (1990) 4866.CrossRefGoogle Scholar
  14. 14.
    K. K. Phani and S. K. Niyogi, in “High Tech Ceramics”, edited by P. Vincenzini (Elsevier, Amsterdam, 1987) p. 1391.Google Scholar
  15. 15.
    W. A. Simpson, J. Acoust. Soc. Amer. 56 (1974) 1776.CrossRefGoogle Scholar
  16. 16.
    H. E. Kautz, in “Acousto-ultrasonics Theory and Applications”, edited by J. C. Duke (Plenum, New York, 1988) p. 127.CrossRefGoogle Scholar

Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • B. O. Aduda
    • 1
  • R. D. Rawlings
    • 1
  1. 1.Department of MaterialsImperial College of Science, Technology and MedicineLondonUK

Personalised recommendations