Experimental and Theoretical Studies on the Elasticity of Molybdenum
Experiments have been conducted to measure compressional (VP) and shear wave (VS) velocities as well as unit-cell volumes (densities) of molybdenum to 12.0 GPa at room temperature using ultrasonic interferometry in conjunction with synchrotron x-radiation. Both VP and VS as well as the adiabatic bulk (KS) and shear (G) moduli exhibit monotonic increase with increasing pressure. A finite strain equation of state analysis of the directly measured velocities and densities yields KS0 = 260.7(5) GPa, G0 = 125.1(2) GPa, KS0' = 4.7(1), and G0' = 1.5(1) for the elastic bulk and shear moduli and their pressure derivatives at ambient conditions. Complimentary to the experimental data, VP and VS as well as the elastic bulk and shear moduli were also computed using density functional theory (DFT) at pressures comparable to the current experiment. Comparing with experimental results, the velocities and elastic moduli from DFT calculations exhibit close agreement with the current experimental data both in their values as well as in their pressure dependence.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source
- Sponsoring Organization:
- Doe - Office Of Science
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 980201
- Report Number(s):
- BNL-93119-2010-JA; JAPIAU; TRN: US1005433
- Journal Information:
- Journal of Applied Physics, Vol. 106; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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