Hydrogen trapping at defects in Pd and thermally activated desorption
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F15%3A10316215" target="_blank" >RIV/00216208:11320/15:10316215 - isvavai.cz</a>
Výsledek na webu
<a href="http://www.scientific.net/DDF.365.36" target="_blank" >http://www.scientific.net/DDF.365.36</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.4028/www.scientific.net/DDF.365.36" target="_blank" >10.4028/www.scientific.net/DDF.365.36</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Hydrogen trapping at defects in Pd and thermally activated desorption
Popis výsledku v původním jazyce
Hydrogen interaction with vacancies and dislocations in Pd were investigated in the present work. Well annealed and plastically deformed Pd samples were electrochemically doped with hydrogen up to various hydrogen concentrations. Subsequently the sampleswere subjected to linear annealing (10 K/min) and hydrogen desorption was studied by differential scanning calorimetry (DSC). An endothermic peak caused by hydrogen desorption was observed in the DSC curve of well annealed sample at ~ 178 oC. In plastically deformed samples this peak is shifted to higher temperatures since hydrogen is trapped at dislocations and its diffusivity is suppressed. Moreover, it was found that if the atmosphere surrounding the heated sample contains oxygen the endothermic hydrogen desorption peak is followed by a strong exothermal peak caused by fusion of desorbed hydrogen with oxygen into water vapour molecules. To avoid this undesired effect DSC measurements have to be done in a protective atmosphere which
Název v anglickém jazyce
Hydrogen trapping at defects in Pd and thermally activated desorption
Popis výsledku anglicky
Hydrogen interaction with vacancies and dislocations in Pd were investigated in the present work. Well annealed and plastically deformed Pd samples were electrochemically doped with hydrogen up to various hydrogen concentrations. Subsequently the sampleswere subjected to linear annealing (10 K/min) and hydrogen desorption was studied by differential scanning calorimetry (DSC). An endothermic peak caused by hydrogen desorption was observed in the DSC curve of well annealed sample at ~ 178 oC. In plastically deformed samples this peak is shifted to higher temperatures since hydrogen is trapped at dislocations and its diffusivity is suppressed. Moreover, it was found that if the atmosphere surrounding the heated sample contains oxygen the endothermic hydrogen desorption peak is followed by a strong exothermal peak caused by fusion of desorbed hydrogen with oxygen into water vapour molecules. To avoid this undesired effect DSC measurements have to be done in a protective atmosphere which
Klasifikace
Druh
J<sub>x</sub> - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
CEP obor
BM - Fyzika pevných látek a magnetismus
OECD FORD obor
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Návaznosti výsledku
Projekt
<a href="/cs/project/GA13-09436S" target="_blank" >GA13-09436S: Nedestruktivní mapování prostorového rozložení defektů v silně deformovaných materiálech</a><br>
Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2015
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Defect and Diffusion Forum
ISSN
1012-0386
e-ISSN
—
Svazek periodika
2015
Číslo periodika v rámci svazku
365
Stát vydavatele periodika
CH - Švýcarská konfederace
Počet stran výsledku
6
Strana od-do
36-41
Kód UT WoS článku
—
EID výsledku v databázi Scopus
2-s2.0-84949676794