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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
Papers

Abstract

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.

Keywords

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.

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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

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