Issues »  Volume 41, Issue 8

Hydrogen Sorption Properties, Thermal Stability and Kinetics of Hydrogen Desorption from MgH$_2$ 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 MgH$_2$ 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 MgH$_2$ 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 MgH$_2$ 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 MgH$_2$ 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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