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Solubility of deuterium and hydrogen in fcc iron at high pressures and temperaturesстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Дата последнего поиска статьи во внешних источниках: 24 января 2020 г.
- Авторы: Antonov V.E., Gurev V.M., Kulakov V.I., Kuzovnikov M.A., Sholin I.A., Zuykova V.Y.
- Журнал: Phys. Rev. Materials
- Том: 3
- Год издания: 2019
- Первая страница: 113604
- DOI: 10.1103/PhysRevMaterials.3.113604
- Аннотация: An isobar x(T) of deuterium solubility in iron is constructed at P = 6.3 GPa and 100 ≤ T ≤ 800 °C based on the results of thermal desorption analysis of FeDx samples produced by quenching under high D2 pressure to the temperature of liquid nitrogen. The experiment confirms the value of x = 0.64 at T = 715 °C proposed previously in a neutron diffraction work [Machida et al., Nature Commun. 5, 5063 (2014)] for γ iron deuteride under the assumption that deuterium atoms occupy both octa- and tetrahedral interstices in its fcc metal lattice. An estimate of ΔV/x = 2.2 Å^3/atom D made in that work for the deuterium-induced volume expansion ΔV(x) of fcc iron is also confirmed. To prove that the absorption of protium leads to a similar volume expansion, we constructed an isotherm x(P) of hydrogen solubility in fcc iron at T = 600 °C and H2 pressures from 4.3 to 7.4 GPa. The available ΔV(P,T) data of in situ X-ray diffraction studies of iron hydrides [T. Hiroi et al., J. Alloys Compd. 404–406, 252 (2005); H. Saitoh et al., J. Alloys Compd. 706, 520 (2017)] agree with this isotherm under the assumption that ΔV/x = 2.2 Å^3/atom H. The transformation between the high-temperature fcc (γ) and low-temperature dhcp (ε′) deuterides of iron is shown to occur at 260 °C, which is approximately 100 °C lower than the temperature of the γ↔ε′ transformation in the Fe-H system at the same pressure of 6.3 GPa.
- Добавил в систему: Антонов Владимир Евгеньевич
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | 180.pdf | 516,6 КБ | 19 ноября 2019 [AntonovVE] | |
| 2. | Результаты экспериментов | Supplemental Information | 180suppl.pdf | 835,5 КБ | 19 ноября 2019 [AntonovVE] |