Elasticity of {omega}-phase zirconium
- Mineral Physics Institute, Stony Brook University, Stony Brook, New York 11794 (United States)
- LANSCE Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
Compressional (V{sub P}) and shear wave (V{sub S}) velocities as well as unit-cell volumes of the {omega} phase of Zr have been measured at high pressure (6.9-10.9 GPa) at room temperature using ultrasonic interferometry in conjunction with synchrotron x radiation. Both V{sub P} and V{sub S} as well as the adiabatic bulk (K{sub S}) and shear (G) moduli exhibit monotonic increase with increasing pressure. Using a finite strain equation of state approach, the elastic bulk and shear moduli and their pressure derivatives are derived from the directly measured velocities and densities, yielding K{sub S0}=104.0 (16) GPa, G{sub 0}=45.1 (9) GPa, K{sub S0}{sup '}=2.8 (2), and G{sub 0}{sup '}=0.6 (1) independent of pressure calibration. The low pressure dependence of K{sub S0} and G{sub 0} may be attributed to the pressure-induced progressive s-d electron transfer in the {omega}-Zr as suggested by previous Raman studies as well as static compressions at high pressure.
- OSTI ID:
- 21052710
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 76, Issue 14; Other Information: DOI: 10.1103/PhysRevB.76.144107; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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