Comparison of the Peng−Robinson and Soave−Redlich−Kwong Equations of State Using a New Zero-Pressure-Based Mixing Rule for the Prediction of High-Pressure and High-Temperature Phase Equilibria

1998 ◽  
Vol 37 (5) ◽  
pp. 1580-1585 ◽  
Author(s):  
Chorng H. Twu ◽  
John E. Coon ◽  
David Bluck
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Phase Equilibria ◽  
Equations Of State ◽  
High Temperature Phase ◽  
Temperature Phase ◽  
Mixing Rule

scholarly journals Characterization of the High-Pressure and High-Temperature Phase Diagram and Equation of State of Chromium

2021 ◽  
Author(s):  
Simone Anzellini ◽  
Daniel Errandonea ◽  
Leonid Burakovsky ◽  
John E. Proctor ◽  
Christine M. Beavers
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Equation Of State ◽  
Density Functional ◽  
Equations Of State ◽  
Melting Curve ◽  
High Temperature Phase ◽  
Temperature Phase ◽  
Thermal Equation ◽  
Pressure Derivative

Abstract The high-pressure and high-temperature melting curve of chromium has been investigated both experimentally (in situ), using a laser-heated diamond-anvil cell technique coupled with synchrotron powder X-ray diffraction, and theoretically, using ab initio density-functional theory simulations. In the pressure–temperature range covered experimentally (up to 90 GPa and 4500 K, respectively) only the solid body-centred-cubic and liquid phases of chromium have been observed. Experiments and computer calculations give melting curves in agreement with each other, that can be described by a Simon–Glatzel equation Tm(P) = 2136K(1+P/25.9) 0.41. In addition, a quasi-hydrostatic equation of state at ambient temperature has been experimentally characterized up to 131 GPa and compared with the present simulations. Both methods give very similar third-order Birch-Murnaghan equations of state with a bulk modulus of 182-185 GPa and its pressure derivative of 4.74-5.15. According to the present calculations, the obtained melting curve and equation of state are valid at least up to 815 GPa, being the melting temperature at this pressure 9310 K. Finally, from the obtained results, it was possible to determine a thermal equation of state of chromium valid up to 65 GPa and 2100 K.

High-temperature phase equilibria with the bcc-type β (AlMo) phase in the binary Al–Mo system

2017 ◽  
Vol 83 ◽  
pp. 29-37 ◽  
Author(s):  
Mario J. Kriegel ◽  
Alexander Walnsch ◽  
Olga Fabrichnaya ◽  
Dmytro Pavlyuchkov ◽  
Volker Klemm ◽  
...  
Keyword(s):  
High Temperature ◽  
Phase Equilibria ◽  
High Temperature Phase ◽  
Temperature Phase

scholarly journals The high-temperature phase equilibria of the Ni–Sn–Zn system: Isothermal sections

2011 ◽  
Vol 19 (10) ◽  
pp. 1489-1501 ◽  
Author(s):  
Clemens Schmetterer ◽  
Divakar Rajamohan ◽  
Herbert Ipser ◽  
Hans Flandorfer
Keyword(s):  
High Temperature ◽  
Phase Equilibria ◽  
High Temperature Phase ◽  
Temperature Phase ◽  
Isothermal Sections

High pressure–high temperature phase diagram of InSe

2004 ◽  
Vol 24 (1) ◽  
pp. 111-116 ◽  
Author(s):  
G. Ferlat ◽  
D. Martínez-García ◽  
A. San Miguel ◽  
A. Aouizerat ◽  
V. Muñoz-Sanjosé
Keyword(s):  
Phase Diagram ◽  
High Pressure ◽  
High Temperature ◽  
High Temperature Phase ◽  
Temperature Phase ◽  
High Pressure High Temperature ◽  
Temperature Phase Diagram

Notizen: Einkristall-Daten der Hochdruck-Hochtemperaturphase von CaSi2 / Structural Refinement of the High Pressure-High Temperature Phase of CaSi2

1982 ◽  
Vol 37 (11) ◽  
pp. 1487-1488 ◽  
Author(s):  
Jürgen Evers ◽  
Gilbert Oehlinger ◽  
Armin Weiss
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Single Crystals ◽  
High Temperature Phase ◽  
Temperature Phase ◽  
Structural Refinement ◽  
Interatomic Distances ◽  
High Pressure High Temperature

The high pressure-high temperature phase of CaSi2 is a representative of the α-ThSi2 type of structure. Single crystals grown at 40 kbar and 1000 °C enabled a structural refinement which leads to interatomic distances Si-Si: 229.9(1) pm (1 × ) and 240.0(1) pm (2 × ), Ca-Si: 309.4(4) pm (4 x ) and 323.9(4) pm (8 × ), Ca-Ca: 400.3(3) pm (4 × ) and 428.3(3) pm (4 × ).

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