Главная/ Электронный каталог

Труды сотрудников института физики

w10=
Найдено документов в текущей БД: 1

    First-principles calculations of the equations of state and relative stability of iron carbides at the Earth's core pressures
/ K. D. Litasov [et al.] // Russ. Geol. Geophys. - 2015. - Vol. 56, Is. 1-2. - P. 164-171, DOI 10.1016/j.rgg.2015.01.010. - Cited References:50. - The study was supported by the Russian Science Foundation (grant no. 14-17-00601) and a grant for young scientists from the President of the Russian Federation (MD-500.2013.5) under a project of the Ministry of Education and Science (no. 14.B25.31.0032). The work of S.G. Ovchinnikov and Z.I. Popov was also supported by the Leading Science School program (no. NSh-2886.2014.2). . - ISSN 1068. - ISSN 1878-030X. -
РУБ Geosciences, Multidisciplinary

Аннотация: Recent experimental studies have demonstrated that Fe3C is more stable than Fe7C3 under PT-conditions of the Earth's core. Theoretical calculations at 0 K, in turn, show the possible stability of Fe2C at the core pressures. Therefore, a theoretical modeling of iron carbides at <=500 GPa is carried out. Energetically stable phases and the pressures of magnetic transitions at 0 K are determined. The parameters of magnetic transitions for Fe7C3 and Fe3C are consistent with those determined in the previous papers. The phase transition from Pnnm to Pnma in Fe2C at 28 GPa is estimated. At > 100 GPa, Fe2C loses its magnetic moment. Assuming carbon to be the only light element in the system, the first-principles calculations yield 2.7-2.9 and 2.0-2.2 wt.% C at the boundary of the inner core at 5000 and 7000 K, respectively.

Смотреть статью,
Scopus,
WOS

Держатели документа:
Russian Acad Sci, Siberian Branch, VS Sobolev Inst Geol & Mineral, Novosibirsk 630090, Russia
Russian Acad Sci, Siberian Branch, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia
Novosibirsk State Univ, Novosibirsk 630090, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Litasov, K. D.; Popov, Z. I.; Попов, Захар Иванович; Gavryushkin, P. N.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Fedorov, A. S.; Федоров, Александр Семенович; Russian Science Foundation [14-17-00601]; Russian Federation under Ministry of Education and Science [MD-500.2013.5, 14.B25.31.0032]; Leading Science School program [NSh-2886.2014.2]
Найти похожие