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Control over fine scale terrace structures induced on polycrystalline Pd by simple heat treatments in air

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cam.issuedOnline2017-08-01
dc.contributor.authorSobral, JM
dc.contributor.authorClyne, TW
dc.contributor.authorRezk, R
dc.contributor.authorMarkaki, AE
dc.contributor.orcidClyne, Bill [0000-0003-2163-1840]
dc.contributor.orcidMarkaki, Athina [0000-0002-2265-1256]
dc.date.accessioned2017-10-02T14:32:53Z
dc.date.available2017-10-02T14:32:53Z
dc.date.issued2017-10-15
dc.description.abstractThis paper presents information about the formation of terraces (often composed of relatively wide faces and relatively narrow steps between them) on samples of polycrystalline palladium. These have been formed via simple heat treatments, involving holding at 1200˚C for periods ranging from a few minutes to several hours, followed by quenching by jets of inert gas. These treatments are such that the terraces are created, and survive the cooling, without significant formation of surface oxide. The crystallographic anisotropy of the surface energy is the driving force for terrace formation, with low surface energy planes tending to be preferentially exposed. Information is presented regarding the surface topography of the terraces and of the grain boundary regions, which have mainly been explored using AFM. Typically, the step heights are of the order of 50 nm and the widths of the faces between them are around 1 µm, although there are quite substantial local variations in these figures. It is shown that a degree of control is possible via the grain structure and texture of the sample, as well as via the processing conditions during the terracing treatment.
dc.description.sponsorshipThis research was supported by the EPSRC (EP/E025862/1) and the European Research Council (Grant No. 240446). Financial support for RR was provided by the Nabaa El Mahabaa, Egypt (ID 5898).
dc.identifier.doi10.17863/CAM.12211
dc.identifier.issn0257-8972
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/267499
dc.language.isoeng
dc.publisherElsevier
dc.publisher.urlhttp://dx.doi.org/10.1016/j.surfcoat.2017.07.071
dc.rightsAttribution 4.0 International
dc.rightsAttribution 4.0 International
dc.rightsAttribution 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectTerraces
dc.subjectPalladium
dc.subjectSurface oxide
dc.subjectSurface energy anisotropy
dc.subjectAFM
dc.titleControl over fine scale terrace structures induced on polycrystalline Pd by simple heat treatments in air
dc.typeArticle
dcterms.dateAccepted2017-07-31
prism.endingPage335
prism.issueIdentifierPart A
prism.publicationDate2017
prism.publicationNameSurface and Coatings Technology
prism.startingPage327
prism.volume326
pubs.funder-project-idEPSRC (EP/C011112/1)
pubs.funder-project-idEuropean Research Council (240446)
pubs.funder-project-idEuropean Commission Horizon 2020 (H2020) Marie Sk?odowska-Curie actions (707684)
rioxxterms.licenseref.startdate2017-10-15
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/
rioxxterms.typeJournal Article/Review
rioxxterms.versionVoR
rioxxterms.versionofrecord10.1016/j.surfcoat.2017.07.071

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