Materials Science

, Volume 31, Issue 6, pp 763–768 | Cite as

On the passage of ultrasonic pulses through a waveguide with a specimen containing charged defects

  • A. V. Volkova
Nondestructive Testing Methods


We discovered a slight increase in the velocity of ultrasonic wavesC and other parameters associated withC. We studied materials with charged defects and show that the physical quantity under consideration usually denoted byC may, in some cases, become so high that it loses its physical meaning. It is demonstrated that the discovered effects are similar to the variations of heat conductivity of liquid helium. We also discuss mechanisms of the anomalous behavior of the investigated quantity.


Helium Heat Conductivity Physical Meaning Physical Quantity Liquid Helium 
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© Plenum Publishing Corporation 1997

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  • A. V. Volkova

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