Hydrogen trapping at defects in Pd and thermally activated desorption

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

Hydrogen trapping at defects in Pd and thermally activated desorption

Original language description

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

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BM - Solid-state physics and magnetism

OECD FORD branch

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Project

<a href="/en/project/GA13-09436S" target="_blank" >GA13-09436S: Non-destructive mapping of spatial distribution of defects in highly strained materials</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2015

Confidentiality

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

Name of the periodical

Defect and Diffusion Forum

ISSN

1012-0386

e-ISSN

—

Volume of the periodical

2015

Issue of the periodical within the volume

365

Country of publishing house

CH - SWITZERLAND

Number of pages

6

Pages from-to

36-41

UT code for WoS article

—

EID of the result in the Scopus database

2-s2.0-84949676794