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Issues »  Volume 41, Issue 8

Hydrogen Sorption Properties, Thermal Stability and Kinetics of Hydrogen Desorption from MgH2 Hydride Phase of a Mechanical Alloy of Magnesium with Ti and Y

O. G. Ershova, V. D. Dobrovolsky, Yu. M. Solonin, A. Yu. Koval

I. M. Frantsevich Institute for Problems in Materials Science, NAS of Ukraine, 3 Academician Krzhyzhanovsky Str., UA-03142 Kyiv, Ukraine

Received: 25.01.2019; final version - 23.05.2019. Download: PDF

The mechanical alloy-composite (MА; Mg + 10% wt. Ti + 5% wt. Y) is synthesized. The phase content, microstructure, thermal stability, kinetics of hydrogen desorption from the MgH2 hydride phase of the obtained MA are studied by using XRD, SEM, TDS methods. As established, the addition of Ti and Y to magnesium leads to significant improvement in the kinetics of hydrogen desorption from the MgH2 hydride phase, which is evidenced by a significant reduction (in 6 times) of the time of half and all hydrogen release from it. The decrease due to Ti and Y alloying in the thermodynamic stability of MgH2 is not found.

Key words: mechanical alloy, microstructure, thermodesorption spectroscopy, hydrogen-sorption properties, thermal stability, kinetics of hydrogen desorption.

URL: http://mfint.imp.kiev.ua/en/abstract/v41/i08/0981.html

DOI: https://doi.org/10.15407/mfint.41.08.0981

PACS: 61.72.S-, 68.43.Mn, 68.43.Nr, 81.07.Bc, 81.20.Ev, 81.20.Wk, 88.30.rd

Citation: O. G. Ershova, V. D. Dobrovolsky, Yu. M. Solonin, and A. Yu. Koval, Hydrogen Sorption Properties, Thermal Stability and Kinetics of Hydrogen Desorption from MgH2 Hydride Phase of a Mechanical Alloy of Magnesium with Ti and Y, Metallofiz. Noveishie Tekhnol., 41, No. 8: 981—1001 (2019) (in Ukrainian)

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