Thermal, Microstructural and Electrochemical Hydriding Performance of a Mg 65 Ni 20 Cu 5 Y 10 Metallic Glass Catalyzed by CNT and Processed by High-Pressure Torsion

Ádám Révész (), Marcell Gajdics, Miratul Alifah, Viktória Kovács Kis, Erhard Schafler, Lajos Károly Varga, Stanislava Todorova, Tony Spassov and Marcello Baricco
Additional contact information
Ádám Révész: Department of Materials Physics, Eötvös University, P.O. Box 32, H-1518 Budapest, Hungary
Marcell Gajdics: Center of Energy Research, Hungarian Academy of Sciences, H-1121 Budapest, Hungary
Miratul Alifah: Department of Materials Physics, Eötvös University, P.O. Box 32, H-1518 Budapest, Hungary
Viktória Kovács Kis: Center of Energy Research, Hungarian Academy of Sciences, H-1121 Budapest, Hungary
Erhard Schafler: Physics of Nanostructured Materials, Faculty of Physics, University of Vienna, A-1090 Vienna, Austria
Lajos Károly Varga: Research Institute for Solid State Physics and Optics, Hungarian Academy of Sciences, P.O. Box 49, H-1525 Budapest, Hungary
Stanislava Todorova: Department of Chemistry, University of Sofia “St. Kl. Ohridski”, 1164 Sofia, Bulgaria
Tony Spassov: Department of Chemistry, University of Sofia “St. Kl. Ohridski”, 1164 Sofia, Bulgaria
Marcello Baricco: Dipartimento di Chimica and NIS-INSTM, Università di Torino, Via P. Giuria 7, 10125 Torino, Italy

Energies, 2022, vol. 15, issue 15, 1-15

Abstract: A Mg 65 Ni 20 Cu 5 Y 10 metallic glass was produced by melt spinning and was mixed with a 5 wt.% multiwall carbon nanotube additive in a high-energy ball mill. Subsequently, the composite mixture was exposed to high-pressure torsion deformation with different torsion numbers. Complimentary XRD and DSC experiments confirmed the exceptional structural and thermal stability of the amorphous phase against severe plastic deformation. Combined high-resolution transmission electron microscopy observations and fast Fourier transform analysis revealed deformation-induced Mg 2 Ni nanocrystals, together with the structural and morphological stability of the nanotubes. The electrochemical hydrogen discharge capacity of the severely deformed pure metallic glass was substantially lower than that of samples with the nanotube additive for several cycles. It was also established that the most deformed sample containing nanotubes exhibited a drastic breakdown in the electrochemical capacity after eight cycles.

Keywords: metallic glass; melt spinning; high-pressure torsion; hydrogen storage (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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