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High-pressure high-temperature stability of hcp-IrxOs1−x (x = 0.50 and 0.55) alloys
Kirill Yusenko,
Elena Bykova,
Maxim Bykov,
Sergey A. Gromilov,
Alexander V. Kurnosov,
Clemens Prescher,
Vitali B. Prakapenka,
Wilson A. Crichton,
Michael Hanfland,
Serena Margadonna ,
Leonid S. Dubrovinsky
Journal of Alloys and Compounds, Volume: 700, Pages: 198 - 207
Swansea University Authors: Kirill Yusenko, Serena Margadonna
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DOI (Published version): 10.1016/j.jallcom.2016.12.207
Abstract
An in situ powder X-ray diffraction has been used for a monitoring a formation of hcp-Ir0.55Os0.45 alloy from (NH4)2[Ir0.55Os0.45Cl6] precursor. A crystalline intermediate compound and nanodimentional metallic particles with a large concentration of defects has been found as key intermediates in the...
Published in: | Journal of Alloys and Compounds |
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ISSN: | 0925-8388 |
Published: |
2017
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Online Access: |
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URI: | https://cronfa.swan.ac.uk/Record/cronfa31566 |
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Abstract: |
An in situ powder X-ray diffraction has been used for a monitoring a formation of hcp-Ir0.55Os0.45 alloy from (NH4)2[Ir0.55Os0.45Cl6] precursor. A crystalline intermediate compound and nanodimentional metallic particles with a large concentration of defects has been found as key intermediates in the thermal decomposition process in hydrogen flow. High-temperature stability of titled hcp-structured alloys has been investigated upon compression up to 11 GPa using a multi-anvil press and up to 80 GPa using laser-heated diamond-anvil cells to obtain a phase separation into fcc + hcp mixture. Obtained high-pressure high-temperature data allowed us to construct the first model for pressure-dependent Ir─Os phase diagram. |
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Keywords: |
High-pressure; High-temperature; Alloys; Iridium; Osmium |
College: |
Faculty of Science and Engineering |
Start Page: |
198 |
End Page: |
207 |