Hydrogen-induced defects and multiplication of dislocations in Palladium

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F15%3A10315704" target="_blank" >RIV/00216208:11320/15:10315704 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.jallcom.2014.12.155" target="_blank" >http://dx.doi.org/10.1016/j.jallcom.2014.12.155</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jallcom.2014.12.155" target="_blank" >10.1016/j.jallcom.2014.12.155</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Hydrogen-induced defects and multiplication of dislocations in Palladium

Popis výsledku v původním jazyce

In the present work positron lifetime spectroscopy was employed for investigation of hydrogen-induced defects in Pd. Well annealed polycrystalline Pd samples were electrochemically charged with hydrogen and the development of defects with increasing hydrogen concentration was investigated. At low concentrations (alpha-phase region, x(H) < 0.017 H/Pd) hydrogen loading introduced vacancies surrounded by hydrogen atoms and characterized by a positron lifetime of approximate to 200 ps. When the hydrogen concentration exceeded 0.017 H/Pd the alpha-phase transformed into the hydrogen rich alpha'-phase. This generated dislocations characterized by a positron lifetime of approximate to 170 ps. Dislocations can accommodate a large volume mismatch between the alpha and the alpha'-phase. Hardness testing revealed that absorbed hydrogen made Pd harder. In the alpha-phase region hardness increased due to solid solution hardening caused by dissolved hydrogen. Dislocations created by the alpha to alp

Název v anglickém jazyce

Hydrogen-induced defects and multiplication of dislocations in Palladium

Popis výsledku anglicky

In the present work positron lifetime spectroscopy was employed for investigation of hydrogen-induced defects in Pd. Well annealed polycrystalline Pd samples were electrochemically charged with hydrogen and the development of defects with increasing hydrogen concentration was investigated. At low concentrations (alpha-phase region, x(H) < 0.017 H/Pd) hydrogen loading introduced vacancies surrounded by hydrogen atoms and characterized by a positron lifetime of approximate to 200 ps. When the hydrogen concentration exceeded 0.017 H/Pd the alpha-phase transformed into the hydrogen rich alpha'-phase. This generated dislocations characterized by a positron lifetime of approximate to 170 ps. Dislocations can accommodate a large volume mismatch between the alpha and the alpha'-phase. Hardness testing revealed that absorbed hydrogen made Pd harder. In the alpha-phase region hardness increased due to solid solution hardening caused by dissolved hydrogen. Dislocations created by the alpha to alp

Druh

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

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

—

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 periodika

Journal of Alloys and Compounds

ISSN

0925-8388

e-ISSN

—

Svazek periodika

645

Číslo periodika v rámci svazku

Supplement 1

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

4

Strana od-do

"S312"-"S315"

Kód UT WoS článku

000360404100072

EID výsledku v databázi Scopus

2-s2.0-84939253804