TY  - JOUR
AU  - Courac, Alexandre
AU  - Le Godec, Yann
AU  - Solozhenko, Vladimir
AU  - Guignot, Nicolas
AU  - Crichton, Wilson A.
TI  - Thermoelastic equation of state and melting of Mg metal at high pressure and high temperature
JO  - Journal of applied physics
VL  - 127
IS  - 5
SN  - 1089-7550
CY  - Melville, NY
PB  - American Inst. of Physics
M1  - PUBDB-2020-00711
SP  - 055903 -
PY  - 2020
N1  - © Author(s).
AB  - The p-V-T equation of state of magnesium metal has been measured up to 20 GPa and 1500 K using both multianvil and opposite anvil techniques combined with synchrotron x-ray diffraction. To fit the experimental data, the model of Anderson–Grüneisen has been used with fixed parameter δT. The 300-K bulk modulus of B0 = 32.5(1) GPa and its first pressure derivative, B0′ = 3.73(2), have been obtained by fitting available data up to 20 GPa to the Murnaghan equation of state. Thermal expansion at ambient pressure has been described using second order polynomial with coefficients a = 25(2) × 10−6 K−1 and b = 9.4(4) × 10−9 K−2. The parameter describing simultaneous pressure and temperature impact on the thermal expansion coefficient (and, therefore, volume) is δT = 1.5(5). The good agreement between fitted and experimental isobars has been achieved to relative volumes of 0.75. The Mg melting observed by x-ray diffraction and in situ electrical resistivity measurements confirms previous results and additionally confirms the p-T estimations in the vicinity of melting.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000513135300024
DO  - DOI:10.1063/1.5135649
UR  - https://bib-pubdb1.desy.de/record/435565
ER  -