HYDROGENATION PROPERTIES OF BALL-MILLED Mg-Ti-C-Zr COMPOSITE

0468223 - ÚFM 2017 RIV CZ eng C - Conference Paper (international conference)
Král, Lubomír - Čermák, Jiří - Roupcová, Pavla
HYDROGENATION PROPERTIES OF BALL-MILLED Mg-Ti-C-Zr COMPOSITE.
METAL 2016: 25th International Conference on Metallurgy and Materials. Ostrava: Tanger Ltd., 2016, s. 1445-1449. ISBN 978-80-87294-67-3.
[METAL 2016 - Anniversary International Conference on Metallurgy and Materials /25./. Brno (CZ), 25.05.2016-27.05.2016]
R&D Projects: GA MŠMT(CZ) ED1.1.00/02.0068
Institutional support: RVO:68081723
Keywords : hydrides * hydrogen storage * Mg-alloys
Subject RIV: JJ - Other Materials

The hydrogen storage properties of ball-milled Mg-Ti-Zr-C composite (1.8 wt.% Ti, 1.9 wt.% Zr and 0.2 wt.% C) were investigated. It has been previously shown, that the addition of Ti, Zr and C improved its storage properties. This beneficial effect of additives upon hydrogen storage properties can be explained by catalysis by the particles rich in Ti or Zr located on the surface of Mg grains. They provide effective pathways for the hydrogen diffusion into the MgH2. The morphological and microstructural characteristics were investigated by scanning electron microscopy and by X-ray diffraction. The hydrogen sorption was measured by Sieverts method using Setaram PCT-Pro device. In this paper, sorption behaviour of the composite after ball-milling and after aging on the air was compared. The ball-milled composite adsorbed 3.5 wt.% H2 within 10 min at 623 K. However, hydrogen storage capacity of the composite aged on the air for 7 months remarkably decreased: The aged composite adsorbed within 10 min only 2 wt.% H2 at 623 K and the sorption capacity decreased from 4.7 wt.% H2 to 2.1 wt.% H2.
Permanent Link: http://hdl.handle.net/11104/0266065