Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 672, Issue -, Pages 623-629Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2016.02.209
Keywords
Metal hydrides; Phase equilibria
Categories
Funding
- Russian Foundation for Basic Research [14-02-01200]
- Russian Academy of Sciences
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The T-P phase diagram of the Mo-H system studied earlier at hydrogen pressures up to 5.3 GPa and temperatures up to 1200 degrees C by in-situ X-ray diffraction [Y. Fukai et al. Mater. Trans. 44 (2003) 1359] is re-examined at P <= 6 GPa and T <= 800 degrees C using a quenching technique. The formation of the high-temperature fcc MoH hydride at T > 480-570 degrees C is not confirmed. Instead, the stability region of the low-temperature hcp MoH1.1 hydride is found to grow with pressure. The temperature of its boundary with the region of diluted Mo-H solutions rises with pressure and reaches 800 degrees C at P approximate to 5.5 GPa. (C) 2016 Elsevier B.V. All rights reserved.
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