Characterization of a nanocrystalline Mg-Ni alloy processed by high-pressure torsion during hydrogenation and dehydrogenation

Author(s)
Marcell Gajdics, Marco Calizzi, Luca Pasquini, Erhard Schafler, Adam Revesz
Abstract

Ball-milled Mg-Ni powder has been cold-compacted and subsequently processed by severe shear deformation under high-pressure torsion. The effect of high pressure torsion on morphology and microstructure of the disk-shape samples has been characterized by scanning electron microscopy and X-ray diffraction, respectively. In order to achieve partially hydrogenated and dehydrogenated states of deformed samples, the hydrogen uptake or release was interrupted at 25%, 50% and 75% hydrogen contents in a Sieverts' type apparatus. In this paper we present the characterization of the microstructure during a full absorption-desorption cycle of the nanocrystalline Mg-Ni alloy.

Organisation(s)
Physics of Nanostructured Materials
Journal
International Journal of Hydrogen Energy
Volume
41
Pages
9803-9809
No. of pages
7
ISSN
0360-3199
DOI
https://doi.org/10.1016/j.ijhydene.2015.12.224
Publication date
06-2016
Publication status
Published
Peer reviewed
Yes
Austrian Fields of Science 2012
103018 Materials physics
Keywords
Hydrogen, Magnesium, Deformation, High pressure torsion, Absorption, STORAGE PROPERTIES, MICROSTRUCTURAL EVOLUTION, METAL-HYDRIDES, MAGNESIUM, SORPTION, MG2NIH4
Portal url
https://ucris.univie.ac.at/portal/en/publications/characterization-of-a-nanocrystalline-mgni-alloy-processed-by-highpressure-torsion-during-hydrogenation-and-dehydrogenation(ccdf5edb-b362-49ae-9073-b3bd881a2651).html