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August 7, 2026; Marseille, France
VIII International Scientific and Theoretical Conference «Modern vision of implementing innovations in scientific studies»

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THE EFFECT OF 5 WT.% MAX-PHASE (Ti3SiC2 + TiC) ADDITIVE ON THE THERMAL STABILITY, DECOMPOSITION KINETICS OF NANOSIZED MgH2 OF MECHANICAL ALLOY, OBTAINED BY MECHANOCHEMISTRY

Published 07.08.2026

  • O. Ershova
    • ,
  • D. Korablov
    • ,
  • A. Danylenko
    • ,
  • Yuriy Solonin
    •

O. Ershova
Frantsevich Institute for Problems of Materials Science, NAS of Ukraine, Ukraine

D. Korablov
Frantsevich Institute for Problems of Materials Science, NAS of Ukraine, Ukraine

A. Danylenko
Frantsevich Institute for Problems of Materials Science, NAS of Ukraine, Ukraine

Yuriy Solonin
Frantsevich Institute for Problems of Materials Science, NAS of Ukraine, Ukraine

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Abstract

To reduce the decomposition temperature and improve the kinetics of nanosized MgH 2 hydride decomposition, a Mg + 5 wt.% (Ti 3SiC2 + TiC) mechanical alloy (MA) was synthesized by reactive ball milling under a hydrogen pressure of 9 MPa. The effect of the MAX phase (Ti3SiC2 + TiC) on the hydrogen sorption properties, thermal stability, and hydrogen desorption kinetics of the MgH2 hydride phase obtained by reactive milling (under a hydrogen pressure of 0.1 MPa in the reactor) was investigated using thermal desorption spectroscopy. It was established that the addition of the MAX phase to Mg does not decrease the onset temperature of hydrogen desorption from the MgH 2 hydride phase and does not reduce its thermodynamic stability. However, significantly enhanced desorption kinetics were observed for the MA (Mg + 5 wt.% (Ti3SiC2 + TiC)) compared with pure Mg. At 330 °C and a hydrogen pressure of 0.1 MPa, 50% of the total hydrogen content and complete hydrogen desorption were achieved within 6,7 and 15 min, respectively, whereas at 350 °C these values were reached within 3,4 and 9 min, respectively. The investigated mechanically alloyed materials containing the MgH2 hydride phase were capable of reversibly absorbing 5.1–5.3 wt.% H2.

Author Biography

O. Ershova

PhD senior researcher, candidate of technical sciences; Senior Research Fellow; leading researcher

D. Korablov

PhD senior researcher, candidate of Sciences Physics and Mathematics

A. Danylenko

PhD senior researcher, candidate of Sciences Physics and Mathematics

Yuriy Solonin

Dr of Physic. and Mathemat. Sciences, Academ. of the NAS of Ukraine

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