Abstract—
To optimize hydrogenation conditions for microcrystalline eutectic alloy with the composition Mg69Al31 (a mixture of magnesium with the γ-Mg17Al12 intermetallic compound), we have studied reactions of 200-μm powder of the alloy with hydrogen and ammonia in the temperature range 100–500°C. We have determined the composition of the reaction products and demonstrated that the use of hydrogen allows magnesium dihydride to be obtained at a temperature of 420°C and that the hydrogenation of the eutectic alloy with ammonia as a hydriding agent leads to the formation of MgH2 and a solid solution of hydrogen in the Mg17Al12 intermetallic compound at 250°C. The hydrogen content in the reaction products obtained by hydrogenation with hydrogen is 4.4 wt %.
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ACKNOWLEDGMENTS
In the scanning electron microscopy and X-ray diffraction work, we used equipment at the Shared Analytical Facilities Centers, Institute of Problems of Chemical Physics and Scientific Center in Chernogolovka, Russian Academy of Sciences.
Funding
This work was supported by the Russian Federation Ministry of Science and Higher Education, agreement no. 05.574.21.0209, unique identifier RFMEFI57418X0209.
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Fokin, V.N., Fursikov, P.V., Fokina, E.E. et al. Hydrogenation of Eutectic Alloy in the Mg–Al System. Inorg Mater 57, 234–240 (2021). https://doi.org/10.1134/S0020168521030043
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DOI: https://doi.org/10.1134/S0020168521030043