Behavior of W-based materials in hot helium gas

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dc.contributor.authorMatějíček, Jiřícs
dc.contributor.authorVilémová, Monikacs
dc.contributor.authorHadraba, Hynekcs
dc.contributor.authorDi Gabriele, Foscacs
dc.contributor.authorKuběna, Ivocs
dc.contributor.authorKolíbalová, Evacs
dc.contributor.authorMichalička, Jancs
dc.contributor.authorČech, Jaroslavcs
dc.contributor.authorJäger, Alešcs
dc.coverage.issue1cs
dc.coverage.volume9cs
dc.date.accessioned2022-05-10T10:52:22Z
dc.date.available2022-05-10T10:52:22Z
dc.date.issued2016-12-01cs
dc.description.abstractMaterials for the plasma facing components of future fusion reactors will be subjected to complex loading and various forms of interaction with low Z species (hydrogen isotopes and helium). The divertor components will be among the most intensely loaded, as they will have to transfer heat loads up to 10–20 MW/m2. Besides the plasma facing surface being irradiated by highly energetic deuterium, tritium and helium particles from the burning plasma, the opposite surface will be exposed to a cooling medium at elevated temperature. Helium- and water-based cooling systems are currently being considered. While tungsten is the prime candidate material for the plasma facing components, in the helium-cooled divertor designs, it is also foreseen as a structural material, together with ferritic–martensitic steels. The behavior of these materials in He atmosphere at elevated temperatures has been little studied thus far, and therefore is the subject of the current work. A number of W-based materials (pure tungsten and some of its alloys) prepared by powder metallurgy techniques was exposed to He atmosphere at 720 C and 500 kPa for 500 h. Morphological surface changes were observed by SEM, chemical and phase composition was analyzed by EDS and XRD, respectively. The internal microstructure was observed by a combination of SEM, FIB and TEM techniques. Mechanical properties were determined by instrumented indentation. Some alloys developed a thin oxide layer, in some cases new morphological features were observed, while some samples remained mostly intact. The observed changes are correlated with specific compositions and microstructures.en
dc.formattextcs
dc.format.extent405-410cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationNuclear Materials and Energy. 2016, vol. 9, issue 1, p. 405-410.en
dc.identifier.doi10.1016/j.nme.2016.03.009cs
dc.identifier.issn2352-1791cs
dc.identifier.other149573cs
dc.identifier.urihttp://hdl.handle.net/11012/204197
dc.language.isoencs
dc.publisherElseviercs
dc.relation.ispartofNuclear Materials and Energycs
dc.relation.urihttp://www.sciencedirect.com/science/article/pii/S2352179115300429cs
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2352-1791/cs
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/cs
dc.subjectTungstenen
dc.subjectHeliumen
dc.subjectDivertoren
dc.titleBehavior of W-based materials in hot helium gasen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-149573en
sync.item.dbtypeVAVen
sync.item.insts2022.05.10 12:52:22en
sync.item.modts2022.05.10 12:14:16en
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Středoevropský technologický institut VUTcs
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