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The temperature sensitivity of elastic wave velocity at high pressure: New results for molybdenum
Author(s) -
Duffy Thomas S.,
Ahrens Thomas J.
Publication year - 1994
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/94gl00223
Subject(s) - molybdenum , materials science , shock wave , silicate , thermodynamics , compression (physics) , high pressure , shock (circulatory) , yield (engineering) , scaling , mineralogy , geology , metallurgy , physics , composite material , geometry , mathematics , medicine , astronomy
A new experimental technique is described whereby a material is heated to very high temperature (T), shock compressed to high pressure (P) (and higher T), and the compressional elastic wave velocity of the high P and T state is measured. This method has been applied to the high‐pressure standard molybdenum at pressures between 12 and 81 GPa and at an initial temperature of 1400°C. The compressional velocity of Mo at 2450°C and 81 GPa is found to be 7.91 km/s, compared to a calculated value of 8.36 km/s at 81 GPa along the 25°C isotherm. Data for molybdenum, a number of other metals, and a silicate yield a consistent trend which can be used to determine the scaling coefficient between compressional velocity and temperature at geophysically relevant conditions.