Investigation of nanocrystalline Gd films loaded with hydrogen

Handle URI:
http://hdl.handle.net/10754/347288
Title:
Investigation of nanocrystalline Gd films loaded with hydrogen
Authors:
Hruška, Petr; Čížek, Jakub; Dobroň, Patrik; Anwand, Wolfgang; Mücklich, Arndt; Gemma, Ryota; Wagner, Stefan; Uchida, Helmut; Pundt, Astrid
Abstract:
The present work reports on microstructure studies of hydrogen-loaded nanocrystalline Gd films prepared by cold cathode beam sputtering on sapphire (112¯0) substrates. The Gd films were electrochemically step-by-step charged with hydrogen and the structural development with increasing concentration of absorbed hydrogen was studied by transmission electron microscopy and in-situ   X-ray diffraction using synchrotron radiation. The relaxation of hydrogen-induced stresses was examined by acoustic emission measurements. In the low concentration range absorbed hydrogen occupies preferentially vacancy-like defects at GBs typical for nanocrystalline films. With increasing hydrogen concentration hydrogen starts to occupy interstitial sites. At the solid solution limit the grains gradually transform into the ββ-phase (GdH2). Finally at high hydrogen concentrations xH>2.0xH>2.0 H/Gd, the film structure becomes almost completely amorphous. Contrary to bulk Gd specimens, the formation of the γγ-phase (GdH3) was not observed in this work.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Investigation of nanocrystalline Gd films loaded with hydrogen 2015 Journal of Alloys and Compounds
Publisher:
Elsevier BV
Journal:
Journal of Alloys and Compounds
Issue Date:
Jan-2015
DOI:
10.1016/j.jallcom.2014.12.156
Type:
Article
ISSN:
09258388
Additional Links:
http://linkinghub.elsevier.com/retrieve/pii/S0925838814030849
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorHruška, Petren
dc.contributor.authorČížek, Jakuben
dc.contributor.authorDobroň, Patriken
dc.contributor.authorAnwand, Wolfgangen
dc.contributor.authorMücklich, Arndten
dc.contributor.authorGemma, Ryotaen
dc.contributor.authorWagner, Stefanen
dc.contributor.authorUchida, Helmuten
dc.contributor.authorPundt, Astriden
dc.date.accessioned2015-03-30T12:47:46Zen
dc.date.available2015-03-30T12:47:46Zen
dc.date.issued2015-01en
dc.identifier.citationInvestigation of nanocrystalline Gd films loaded with hydrogen 2015 Journal of Alloys and Compoundsen
dc.identifier.issn09258388en
dc.identifier.doi10.1016/j.jallcom.2014.12.156en
dc.identifier.urihttp://hdl.handle.net/10754/347288en
dc.description.abstractThe present work reports on microstructure studies of hydrogen-loaded nanocrystalline Gd films prepared by cold cathode beam sputtering on sapphire (112¯0) substrates. The Gd films were electrochemically step-by-step charged with hydrogen and the structural development with increasing concentration of absorbed hydrogen was studied by transmission electron microscopy and in-situ   X-ray diffraction using synchrotron radiation. The relaxation of hydrogen-induced stresses was examined by acoustic emission measurements. In the low concentration range absorbed hydrogen occupies preferentially vacancy-like defects at GBs typical for nanocrystalline films. With increasing hydrogen concentration hydrogen starts to occupy interstitial sites. At the solid solution limit the grains gradually transform into the ββ-phase (GdH2). Finally at high hydrogen concentrations xH>2.0xH>2.0 H/Gd, the film structure becomes almost completely amorphous. Contrary to bulk Gd specimens, the formation of the γγ-phase (GdH3) was not observed in this work.en
dc.publisherElsevier BVen
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S0925838814030849en
dc.rightsArchived with thanks to Journal of Alloys and Compounds. Copyright © 2015 Published by Elsevier B.V.en
dc.titleInvestigation of nanocrystalline Gd films loaded with hydrogenen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalJournal of Alloys and Compoundsen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionCharles University in Prague, Faculty of Mathematics and Physics, Czech Republicen
dc.contributor.institutionInstitute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Germanyen
dc.contributor.institutionInstitute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Germanyen
dc.contributor.institutionInstitute for Materials Physics, University of Göttingen, Germanyen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorGemma, Ryotaen
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