Pundt, Astrid

[["dc.bibliographiccitation.firstpage","99"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Procedia Engineering"],["dc.bibliographiccitation.lastpage","103"],["dc.bibliographiccitation.volume","1"],["dc.contributor.author","Cizek, J."],["dc.contributor.author","Prochazka, I."],["dc.contributor.author","Vlach, M."],["dc.contributor.author","Zaludova, N."],["dc.contributor.author","Dobron, P."],["dc.contributor.author","Chmelik, F."],["dc.contributor.author","Brauer, G."],["dc.contributor.author","Anwand, W."],["dc.contributor.author","Mücklich, A."],["dc.contributor.author","Nikitin, E."],["dc.contributor.author","Gemma, R."],["dc.contributor.author","Pundt, A."],["dc.contributor.author","Kirchheim, R."],["dc.date.accessioned","2019-07-09T11:40:46Z"],["dc.date.available","2019-07-09T11:40:46Z"],["dc.date.issued","2009"],["dc.description.abstract","Hydrogen loading causes a significant volume expansion, which is isotropic in free-standing bulk materials. Contrary to bulk samples, thin films are clamped to an elastically stiff substrate, which prevents in-plane expansion. Hence, volume expansion of a thin film is strongly anisotropic because it expands only in the out-of-plane direction. High internal stresses introduced during hydrogen loading may lead to a situation when detachment of film from the substrate is energetically favorable. In the present work, we studied hydrogen-induced buckling of thin Pd films using a multi-scale approach. Defects in buckled films were characterized on the atomic level by positron annihilation spectroscopy combined with microstructure studies by transmission electron microscopy. Meso-scale measurements were performed by acoustics emission. Observations at the macroscopic level were performed by optical microscopy. It was found that buckling of thin films occurs at hydrogen concentrations xH>0.1. Defect studies of buckled Pd films revealed a significant increase of dislocation density in agreement with acoustic emission studies which demonstrated a correlated movement of dislocations with a well-defined threshold coinciding with the onset of buckling."],["dc.identifier.doi","10.1016/j.proeng.2009.06.024"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/11293"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/58244"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.relation.issn","1877-7058"],["dc.relation.orgunit","Fakultät für Physik"],["dc.rights","CC BY-NC-ND 3.0"],["dc.rights.uri","http://creativecommons.org/licenses/by-nc-nd/3.0/"],["dc.title","Multi-scale analysis of hydrogen-induced buckling in Pd films"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]