Equations of state of rhodium, iridium and their alloys up to 70 GPa

Kirill V. Yusenko, Saiana Khandarkhaeva, Timofey Fedotenko, Anna Pakhomova, Sergey A. Gromilov, Leonid Dubrovinsky, Natalia Dubrovinskaia

Результат исследования: Научные публикации в периодических изданияхстатья

2 Цитирования (Scopus)

Аннотация

Knowledge of the compressional and thermal behaviour of metals and alloys is of a high fundamental and applied value. In this work, we studied the behaviour of Ir, Rh, and their fcc-structured alloys, Ir 0.42 Rh 0.58 and Ir 0.26 Os 0.05 Pt 0.31 Rh 0.23 Ru 0.15 , up to 70 GPa using the diamond anvil cell technique with synchrotron X-ray diffraction. We found that all these materials are structurally stable upon room-temperature hydrostatic compression in the whole pressure interval, as well as upon heating to 2273 K both at ambient and high pressure. Rh, Ir 0.42 Rh 0.58 and Ir 0.26 Os 0.05 Pt 0.31 Rh 0.23 Ru 0.15 were investigated under static compression for the first time. According to our data, the compressibility of Ir, Rh, fcc–Ir 0.42 Rh 0.58 , and fcc–Ir 0.26 Os 0.05 Pt 0.31 Rh 0.23 Ru 0.15 , can be described with the 3rd order Birch-Murnaghan equation of state with the following parameters: V 0 = 14.14(6) Å 3 ·atom −1 , B 0 = 341(10) GPa, and B 0 ' = 4.7(3); V 0 = 13.73(7) Å 3 ·atom −1 , B 0 = 301(9) GPa, and B 0 ' = 3.1(2); V 0 = 13.90(8) Å 3 ·atom −1 , B 0 = 317(17) GPa, and B 0 ' = 6.0(5); V 0 = 14.16(9) Å 3 ·atom −1 , B 0 = 300(22) GPa, B 0 ' = 6(1), where V 0 is the unit cell volume, B 0 and B 0 ' – are the bulk modulus and its pressure derivative.

Язык оригиналаанглийский
Страницы (с-по)212-218
Число страниц7
ЖурналJournal of Alloys and Compounds
Том788
DOI
СостояниеОпубликовано - 5 июн 2019

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  • Цитировать

    Yusenko, K. V., Khandarkhaeva, S., Fedotenko, T., Pakhomova, A., Gromilov, S. A., Dubrovinsky, L., & Dubrovinskaia, N. (2019). Equations of state of rhodium, iridium and their alloys up to 70 GPa. Journal of Alloys and Compounds, 788, 212-218. https://doi.org/10.1016/j.jallcom.2019.02.206