Рубрики:
EQUATION-OF-STATE
MAGNETIC-PROPERTIES
EPSILON-Fe3N1+X
1ST-PRINCIPLES
DIFFRACTION
GAMMA-Fe4N
TRANSITION
Fe4N
EQUATION-OF-STATE
MAGNETIC-PROPERTIES
EPSILON-Fe3N1+X
1ST-PRINCIPLES
DIFFRACTION
GAMMA-Fe4N
TRANSITION
Fe4N
Аннотация: The parameters of the equation of state of the stable epsilon-Fe3Nx (where x = 0.8) nitride in the Fe-N system have been determined at pressures up to 30 GPa and temperatures up to 1273 K. The parameters V-0 = 81.48(2) angstrom(3), K-T = 162(3) GPa, K-T = 4.0 = 1.66(2), gamma(0) = 555 K, and q = 1 have been determined for epsilon-Fe3N0.8 by the approximation of the P V T data with the Vinet equation of state and the thermal parameters within the formalism. No anomalous change in the volume of the cell owing to possible magnetic transitions has been revealed. The instability of Fe4N at high pressures and Fe3N in the presence of a deficit of nitrogen in the system has been established. The stable phase in the temperature range of 300-673 K and the pressure range of 20-30 GPa is epsilon-Fe3N rather than epsilon-Fe3N0.8.
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Держатели документа:
Russian Acad Sci, Siberian Branch, Sobolev Inst Geol & Mineral, Novosibirsk 630090, Russia
Novosibirsk State Univ, Novosibirsk 630090, Russia
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Tohoku Univ, Grad Sch Sci, Dept Earth & Planetary Mat Sci, Sendai, Miyagi 9808578, Japan
Доп.точки доступа:
Litasov, K. D.; Shatskiy, A. F.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Popov, Z. I.; Попов, Захар Иванович; Ponomarev, D. S.; Ohtani, E.; Ministry of Education and Science of the Russian Federation [14.B37.21.1261, 14.B25.31.0032]; Siberian Branch, Russian Academy of Sciences [97]