Hydrogen-Induced Hardening in Palladium

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F15%3A10316216" target="_blank" >RIV/00216208:11320/15:10316216 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.4028/www.scientific.net/DDF.365.297" target="_blank" >http://dx.doi.org/10.4028/www.scientific.net/DDF.365.297</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/www.scientific.net/DDF.365.297" target="_blank" >10.4028/www.scientific.net/DDF.365.297</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Hydrogen-Induced Hardening in Palladium

Popis výsledku v původním jazyce

In the present work, positron annihilation spectroscopy was employed for investigation of hydrogen-induced defects in Pd. Well annealed Pd samples were electrochemically charged with hydrogen and development of defects during hydrogen loading was investigated. At low concentrations (a-phase, xH < 0.017 H/Pd) hydrogen loading introduced vacancies. When the hydrogen concentration exceeds 0.017 H/Pd, particles of hydrogen rich a'-phase are formed. This generates dislocations in the sample in order to accommodate the volume mismatch between the a and the a'-phase. Moreover, additional vacancies are introduced into the sample by crossing dislocations. Vickers hardness testing revealed that absorbed hydrogen causes hardening of the sample. In the a-phase region the hardness increases due to solid solution hardening caused by dissolved hydrogen. At higher hydrogen concentrations when dislocations were created hardness increases due to strain hardening caused by dislocations.

Název v anglickém jazyce

Hydrogen-Induced Hardening in Palladium

Popis výsledku anglicky

In the present work, positron annihilation spectroscopy was employed for investigation of hydrogen-induced defects in Pd. Well annealed Pd samples were electrochemically charged with hydrogen and development of defects during hydrogen loading was investigated. At low concentrations (a-phase, xH < 0.017 H/Pd) hydrogen loading introduced vacancies. When the hydrogen concentration exceeds 0.017 H/Pd, particles of hydrogen rich a'-phase are formed. This generates dislocations in the sample in order to accommodate the volume mismatch between the a and the a'-phase. Moreover, additional vacancies are introduced into the sample by crossing dislocations. Vickers hardness testing revealed that absorbed hydrogen causes hardening of the sample. In the a-phase region the hardness increases due to solid solution hardening caused by dissolved hydrogen. At higher hydrogen concentrations when dislocations were created hardness increases due to strain hardening caused by dislocations.

Druh

D - Stať ve sborníku

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

<a href="/cs/project/GA13-09436S" target="_blank" >GA13-09436S: Nedestruktivní mapování prostorového rozložení defektů v silně deformovaných materiálech</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název statě ve sborníku

Defect and Diffusion Forum

ISBN

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ISSN

1012-0386

e-ISSN

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Počet stran výsledku

8

Strana od-do

297-304

Název nakladatele

Trans Tech Publications

Místo vydání

Switzerland

Místo konání akce

Paris; France

Datum konání akce

23. 6. 2014

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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