Electromagnetic Acoustic Resonance of SiCf/Ti Composites at Elevated Temperatures

Date
1999
Authors
Ogi, H.
Shimoike, G.
Hirao, M.
Takashima, K.
Ohtani, H.
Ledbetter, H.
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Abstract

We studied electromagnetic acoustic resonance at elevated temperatures up to 1000 K. Using Lorentz-force transduction, we measured the temperature dependence of resonant frequencies and attenuation coefficients in SiC-fiber-reinforced Ti-alloy composites. Evolution of the resonance frequencies is consistent with the changes of elastic constants of the matrix, and attenuation evolution is explained by dislocation damping in the matrix.

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