Decomposition of single-source precursors under high-temperature high-pressure to access osmium–platinum refractory alloys

Kirill V. Yusenko, Kristina Spektor, Saiana Khandarkhaeva, Timofey Fedotenko, Anna Pakhomova, Ilya Kupenko, Arno Rohrbach, Stephan Klemme, Wilson A. Crichton, Tatyana V. Dyachkova, Alexander P. Tyutyunnik, Yurii G. Zainulin, Leonid S. Dubrovinsky, Sergey A. Gromilov

Результат исследования: Научные публикации в периодических изданияхстатья

1 Цитирования (Scopus)

Аннотация

Thermal decomposition of (NH4)2[OsxPt1-xCl6] as single-source precursors for Os–Pt binary alloys has been investigated under ambient and high pressure up to 40 GPa. Thermal decomposition of mixed-metal (NH4)2[OsxPt1-xCl6] precursors in hydrogen atmosphere (reductive environment) under ambient pressure results in formation of β-trans-[Pt(NH3)2Cl2] and α-trans-[Pt(NH3)2Cl2] crystalline intermediates as well as single and two-phase Os–Pt binary alloys. For the first time, direct thermal decomposition of coordination compound under pressure has been investigated. A formation of pure metallic alloys from single-source precursors under pressure has been shown. Miscibility between fcc- and hcp-structured alloys has been probed up to 50 GPa by in situ high-pressure X-ray diffraction. Miscibility gap between fcc- and hcp-structured alloys does not change its positions with pressure up to at least 50 GPa.

Язык оригиналаанглийский
Номер статьи152121
ЖурналJournal of Alloys and Compounds
Том813
DOI
СостояниеОпубликовано - 15 янв 2020

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