| Autor: |
Tarumi, Ryuichi, Kawasaki, Yasunori, Ogi, Hirotsugu, Hirao, Masahiko, Kagayama, Tomoko |
| Zdroj: |
Japanese Journal of Applied Physics; Mar2008, Vol. 47 Issue 3R, p1-1, 1p |
| Abstrakt: |
We have succeeded to electromagnetically excite and detect MHz-frequency-range ultrasound shear wave in polycrystalline Al under high pressures. The noncontact thickness-resonant electromagnetic acoustic resonance technique enables us to excite and detect polarized pure shear waves in an Al polycrystalline specimen in a pressurizing liquid through the Lorentz-force mechanism. Shear-mode resonance spectra have been successfully obtained up to 0.55 GPa at ambient temperature. Quasiharmonic analysis for the pressure dependence of shear modulus yields the zone-center shear-mode Grüneisen parameter γS to be 2.683, which agrees well with previously reported values calculated from the third-order elastic constants. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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