Název: HYDROGEN SORPTION IN ORDERED Mg-In ALLOYS
Autoři: Čermák, Jiří ; Král, Lubomír ; Roupcová, Pavla
Typ dokumentu: Příspěvky z konference
Konference/Akce: METAL 2019. International conference on metallurgy and materials /28./, Brno (CZ), 20190522
Rok: 2019
Jazyk: eng
Abstrakt: Hydrogen storage (HS) performance of three Mg- x In- y CB alloys (CB - amorphous carbon, x = 55, 64, 73 y =\n10 wt%) was studied. Indium concentration covered an area of ordered β structures. Alloys were prepared by\nball-milling in hydrogen atmosphere. Kinetic curves and PCT isotherms were measured in the temperature\ninterval from 200 °C to 325 °C. X-ray diffraction spectroscopy (XRD) was used for structure investigation. Alloy\nwith x = 73 wt% In ( β ’’ structure) showed reversible amorphization during temperature cycling between about\n100 °C and 350 °C. Hydrogen sorption experiments were done by the Sieverts method under the hydrogen\ngas pressure ranging from 0.1 MPa to 2.5 MPa. It was found that hydrogen sorption capacity varied between\n0.47 and 1.1 wt% H 2 . Hydride formation enthalpy ∆H calculated from desorption PCT experiments was\nsignificantly lower than ∆H , known for pure Mg. This invoked an idea that atomic order of Mg-based HS\nmaterials might decrease the high thermodynamic stability of hydride phase.
Klíčová slova: hydride stability; Hydrogen storage; Mg alloys; ordering
Číslo projektu: LQ1601 (CEP), GA17-21683S (CEP)
Poskytovatel projektu: GA MŠk, GA ČR
Zdrojový dokument: Metal 2019 - 28th International Conference on Metallurgy and Materials, ISBN 978-80-87294-92-5

Instituce: Ústav fyziky materiálů AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: http://hdl.handle.net/11104/0302518

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-407984


Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav fyziky materiálů
Konferenční materiály > Příspěvky z konference