Difúze vodíku v intermetalické sloučenině Mg2NiH4

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F08%3A00305863" target="_blank" >RIV/68081723:_____/08:00305863 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Hydrogen diffusion in Mg2NiH4 intermetallic compound

Popis výsledku v původním jazyce

Coefficients of hydrogen diffusion in Mg2NiH4 were measured by a volumetric method at temperatures ranging from 449 to 576 K. Experimental material was prepared in two ways: by melting and casting, and by ball-milling and compacting into pellets. Hydrogen charging was performed from the hydrogen gas phase at elevated pressure and temperature. Pellets were charged in two different modes, resulting in structures with either a high fraction of twinned low-temperature phase LT2 or a low fraction of LT2. Itwas observed that LT2 considerably slowed down the hydrogen desorption rate. Activation enthalpy of hydrogen diffusion in high-temperature phase (above transition temperature Ttr=508 K) is approximately half of the value obtained for the low-temperatureregion. Coefficients of hydrogen diffusion in low-temperature un-twinned phase LT1 are by a multiplication factor of about 20 higher than those of the twinned phase LT2.

Název v anglickém jazyce

Hydrogen diffusion in Mg2NiH4 intermetallic compound

Popis výsledku anglicky

Coefficients of hydrogen diffusion in Mg2NiH4 were measured by a volumetric method at temperatures ranging from 449 to 576 K. Experimental material was prepared in two ways: by melting and casting, and by ball-milling and compacting into pellets. Hydrogen charging was performed from the hydrogen gas phase at elevated pressure and temperature. Pellets were charged in two different modes, resulting in structures with either a high fraction of twinned low-temperature phase LT2 or a low fraction of LT2. Itwas observed that LT2 considerably slowed down the hydrogen desorption rate. Activation enthalpy of hydrogen diffusion in high-temperature phase (above transition temperature Ttr=508 K) is approximately half of the value obtained for the low-temperatureregion. Coefficients of hydrogen diffusion in low-temperature un-twinned phase LT1 are by a multiplication factor of about 20 higher than those of the twinned phase LT2.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BJ - Termodynamika

OECD FORD obor

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Projekt

<a href="/cs/project/GA106%2F07%2F0010" target="_blank" >GA106/07/0010: Difúze vodíku ve slitinách Mg-Ni modifikovaných vybranými prvky snižujícími stabilitu hydridů</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2008

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Intermetallics

ISSN

0966-9795

e-ISSN

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Svazek periodika

16

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

508-517

Kód UT WoS článku

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EID výsledku v databázi Scopus

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