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Phase Transformations of Fe3N-Fe4N Iron Nitrides at Pressures up to 30 GPa Studied by In Situ X-ray Diffractometry

Описание

Тип публикации: статья из журнала

Год издания: 2014

Идентификатор DOI: 10.1134/S0021364013250140

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-FПоказать полностьюe3N0.8 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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Издание

Журнал: JETP LETTERS

Выпуск журнала: Vol. 98, Is. 12

Номера страниц: 805-808

ISSN журнала: 00213640

Место издания: NEW YORK

Издатель: MAIK NAUKA/INTERPERIODICA/SPRINGER

Персоны

  • Litasov K.D. (Novosibirsk State University)
  • Shatskiy A.F. (Novosibirsk State University)
  • Ponomarev D.S. (Novosibirsk State University)
  • Ovchinnikov S.G. (Siberian Federal University)
  • Popov Z.I. (Siberian Federal University)
  • Ohtani E. (Department of Earth and Planetary Materials Science, Graduate School of Science,Tohoku University)

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