Hydrogen absorption in Mg-Gd alloy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F17%3A00508749" target="_blank" >RIV/61389021:_____/17:00508749 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/17:10367985

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/abs/pii/S0360319917312922?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S0360319917312922?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijhydene.2017.04.012" target="_blank" >10.1016/j.ijhydene.2017.04.012</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Hydrogen absorption in Mg-Gd alloy

Popis výsledku v původním jazyce

Mg-Gd alloy containing 22 wt.% Gd was studied in the present work. As cast alloy contains Mg46Gd9 phase located at pockets along grain boundaries. In addition the as-cast alloy contains a low concentration of rectangular GdH2 particles. Solution treatment at 530 degrees C was performed in order to dissolve Gd in the Mg matrix. The solution treatment in air enhanced the volume fraction of GdH2 particles by one order of magnitude. The formation of GdH2 particles is caused by hydrogen-induced decomposition of the Mg46Gd9 intermetallic phase. The source of hydrogen is water vapor reacting with Mg surface. A Gd-rich oxide layer was formed during solution treatment in air. Building of the oxide layer requires diffusion of Gd solutes from bulk to the surface and leads to formation of a Gddepleted sub-surface region. It was found that solution treatment in vacuum results in substantially lower volume fraction of GdH2 particles. Alternative methods of formation of GdH2 particles in Mg-Gd alloy were examined as well and are discussed in the paper.

Název v anglickém jazyce

Hydrogen absorption in Mg-Gd alloy

Popis výsledku anglicky

Mg-Gd alloy containing 22 wt.% Gd was studied in the present work. As cast alloy contains Mg46Gd9 phase located at pockets along grain boundaries. In addition the as-cast alloy contains a low concentration of rectangular GdH2 particles. Solution treatment at 530 degrees C was performed in order to dissolve Gd in the Mg matrix. The solution treatment in air enhanced the volume fraction of GdH2 particles by one order of magnitude. The formation of GdH2 particles is caused by hydrogen-induced decomposition of the Mg46Gd9 intermetallic phase. The source of hydrogen is water vapor reacting with Mg surface. A Gd-rich oxide layer was formed during solution treatment in air. Building of the oxide layer requires diffusion of Gd solutes from bulk to the surface and leads to formation of a Gddepleted sub-surface region. It was found that solution treatment in vacuum results in substantially lower volume fraction of GdH2 particles. Alternative methods of formation of GdH2 particles in Mg-Gd alloy were examined as well and are discussed in the paper.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

International Journal of Hydrogen Energy

ISSN

0360-3199

e-ISSN

—

Svazek periodika

42

Číslo periodika v rámci svazku

35

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

22598-22604

Kód UT WoS článku

000411168200043

EID výsledku v databázi Scopus

2-s2.0-85018168899