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Novel approach to plasma facing materials in nuclear fusion reactors

2008-05-26Conference object Open access
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dc.contributor.authorLivramento, Vanessa
dc.contributor.authorCorreia, J.B.
dc.contributor.authorNunes, D.
dc.contributor.authorCarvalho, Patricia Almeida
dc.contributor.authorFernandes, H.
dc.contributor.authorSilva, C.
dc.contributor.authorHanada, K.
dc.contributor.authorShohoji, Nobumitsu
dc.contributor.authorOsawa, E.
dc.date.accessioned2010-06-25T15:32:45Z
dc.date.available2010-06-25T15:32:45Z
dc.date.issued2008-05-26
dc.description.abstractA novel material design in nuclear fusion reactors is proposed based on W-nDiamond nanostructured composites. Generally, a microstructure refined to the nanometer scale improves the mechanical strength due to modification of plasticity mechanisms. Moreover, highly specific grainboundary area raises the number of sites for annihilation of radiation induced defects. However, the low thermal stability of fine-grained and nanostructured materials demands the presence of particles at the grain boundaries that can delay coarsening by a pinning effect. As a result, the concept of a composite is promising in the field of nanostructured materials. The hardness of diamond renders nanodiamond dispersions excellent reinforcing and stabilization candidates and, in addition, diamond has extremely high thermal conductivity. Consequently, W-nDiamond nanocomposites are promising candidates for thermally stable first-wall materials. The proposed design involves the production of WAV-nDiamondAV-Cu/Cu layered castellations. The W, W-nDiamond and W-Cu layers are produced by mechanical alloying followed by a consolidation route that combines hot rolling with spark plasma sintering (SPS). Layer welding is achieved by spark plasma sintering. The present work describes the mechanical alloying processsing and consolidation route used to produce W-nDiamond composites, as well as microstructural features and mechanical properties of the material produced Long term plasma exposure experiments are planned at ISTTOK and at FTU (Frascati).pt
dc.identifier.citationLivramento, V.; Correia, J. Brito; Nunes, D.; Carvalho, P. A.; Fernandes, H.; Silva C.; Hanada, K.; Shohoji, N.; Osawa, E. Novel approach to plasma facing materials in nuclear fusion reactors. In: PSI 18 - Plasma Surface Interactions in Controlled Fusion Devices, Toledo, Spain, 26 - 30 May, 2008, 6p.pt
dc.identifier.urihttp://hdl.handle.net/10400.9/727
dc.language.isoengpt
dc.subjectMechanical alloyingpt
dc.subjectNanoparticlespt
dc.subjectComposite materialspt
dc.titleNovel approach to plasma facing materials in nuclear fusion reactorspt
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferencePlaceToledopt
oaire.citation.titlePSI 18 - Plasma Surface Interactions in Controlled Fusion Devicespt
person.familyNameCorreia
person.familyNameNunes
person.familyNamecarvalho
person.givenNameJose B.
person.givenNameDaniela
person.givenNamepatricia
person.identifier.ciencia-idC31C-D617-6377
person.identifier.ciencia-idC118-38FB-6A57
person.identifier.ciencia-id021E-97A3-F128
person.identifier.orcid0000-0002-8314-0695
person.identifier.orcid0000-0003-3115-6588
person.identifier.orcid0000-0002-5447-0409
person.identifier.ridI-2734-2013
person.identifier.ridC-1150-2009
person.identifier.scopus-author-id7202364148
person.identifier.scopus-author-id26030595200
person.identifier.scopus-author-id7102859165
rcaap.rightsopenAccesspt
rcaap.typeconferenceObjectpt
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relation.isAuthorOfPublication6317af74-10da-4d1b-b413-028afabcf2c8
relation.isAuthorOfPublicationf722bc06-dafc-4341-86f8-b405987804a8
relation.isAuthorOfPublication.latestForDiscovery51557bd3-14c6-4246-b185-36f668c061dd

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