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HYDROGEN SORPTION IN ORDERED Mg-In ALLOYS
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SYSNO ASEP 0511641 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title HYDROGEN SORPTION IN ORDERED Mg-In ALLOYS Author(s) Čermák, Jiří (UFM-A) RID, ORCID
Král, Lubomír (UFM-A) RID, ORCID
Roupcová, Pavla (UFM-A) RID, ORCIDNumber of authors 3 Source Title Metal 2019 - 28th International Conference on Metallurgy and Materials. - Ostrava : TANGER Ltd., Ostrava, 2019 - ISBN 978-80-87294-92-5 Pages s. 1422-1427 Number of pages 6 s. Publication form Medium - C Action METAL 2019. International conference on metallurgy and materials /28./ Event date 22.05.2019 - 24.05.2019 VEvent location Brno Country CZ - Czech Republic Event type WRD Language eng - English Country CZ - Czech Republic Keywords Hydrogen storage ; Mg alloys ; hydride stability ; ordering Subject RIV JJ - Other Materials OECD category Materials engineering R&D Projects LQ1601 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA17-21683S GA ČR - Czech Science Foundation (CSF) Institutional support UFM-A - RVO:68081723 UT WOS 000539487400233 EID SCOPUS 85079428052 Annotation Hydrogen storage (HS) performance of three Mg- x In- y CB alloys (CB - amorphous carbon, x = 55, 64, 73 y =
10 wt%) was studied. Indium concentration covered an area of ordered β structures. Alloys were prepared by
ball-milling in hydrogen atmosphere. Kinetic curves and PCT isotherms were measured in the temperature
interval from 200 °C to 325 °C. X-ray diffraction spectroscopy (XRD) was used for structure investigation. Alloy
with x = 73 wt% In ( β ’’ structure) showed reversible amorphization during temperature cycling between about
100 °C and 350 °C. Hydrogen sorption experiments were done by the Sieverts method under the hydrogen
gas pressure ranging from 0.1 MPa to 2.5 MPa. It was found that hydrogen sorption capacity varied between
0.47 and 1.1 wt% H 2 . Hydride formation enthalpy ∆H calculated from desorption PCT experiments was
significantly lower than ∆H , known for pure Mg. This invoked an idea that atomic order of Mg-based HS
materials might decrease the high thermodynamic stability of hydride phase.Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2021
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