Oxidation–reduction processes upon interaction of aluminum oxide melt with molybdenum and tungsten in a hydrogen-containing atmosphere

A thermodynamic analysis of the processes occurring in the Мо–W–Al 2 O 3 system at T = 2400 K and a total pressure of 1 bar, set by controlled reducing Ar + H 2 atmosphere, has been performed. It is found that the basic components of the system do not interact directly, although may be actively invo...

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Bibliographic Details
Published in:Crystallography reports 2017-07, Vol.62 (4), p.639-647
Main Author: Kostomarov, D. V.
Format: Article
Language:English
Subjects:
ALUMINIUM HYDRIDES
ALUMINIUM OXIDES
Aluminum oxide
ATMOSPHERES
Chemical reactions
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Crystal Growth
Crystallography and Scattering Methods
Hydrides
HYDROGEN
Hydrogen storage
MOLYBDENUM
OXIDATION
Physics
Physics and Astronomy
REAGENTS
REDUCTION
TEMPERATURE RANGE 1000-4000 K
THERMODYNAMICS
TUNGSTEN
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Summary:A thermodynamic analysis of the processes occurring in the Мо–W–Al 2 O 3 system at T = 2400 K and a total pressure of 1 bar, set by controlled reducing Ar + H 2 atmosphere, has been performed. It is found that the basic components of the system do not interact directly, although may be actively involved in chemical reactions with participation of other components to undergo numerous cyclic oxidation–reduction processes. Particular attention is paid to the processes involving such chemically active reagents as Н 2 O 2 , HO 2 , H 2 (H), gaseous Al, and its hydrides (AlH, AlH 2 , AlH 3 ).
ISSN:1063-7745
1562-689X
DOI:10.1134/S1063774517030129