The acoustic impedance and attenuation in composites made of particle fillers loaded in polymer matrices for transducer backing applications is explored. The acoustic impedance of tungsten/ vinyl composites was modeled and an experimental matrix identifying variables that contribute to composite attenuation was established. The variables included the particle type, the particle size and volume fraction of a filler, the physical characteristics of the polymer matrix, and the processing route that determined the composite connectivity. Experimental results showed that with an increase in filler particle size or a decrease in volume fraction of filler, there is an increase in composite attenuation. Overall, the various types of filler, the polymer matrix, and the interface between the two contribute to attenuation in the composite as confirmed by the acoustic properties and the microstructural analysis.
|Original language||English (US)|
|Number of pages||9|
|Journal||IEEE transactions on ultrasonics, ferroelectrics, and frequency control|
|State||Published - Nov 1990|
All Science Journal Classification (ASJC) codes
- Acoustics and Ultrasonics
- Electrical and Electronic Engineering