Repository logo
 
Publication

New WC-Cu thermal barriers for fusion applications: high temperature mechanical behaviour

2018Journal article Open access
Simple item page
dc.contributor.authorTejado, Elena
dc.contributor.authorDias, Marta
dc.contributor.authorCorreia, J.B.
dc.contributor.authorPalacios, T.
dc.contributor.authorCarvalho, Patricia Almeida
dc.contributor.authorAlves, E.
dc.contributor.authorPastor, Jose Ygnacio
dc.date.accessioned2018-10-09T15:40:26Z
dc.date.available2018-10-09T15:40:26Z
dc.date.issued2018
dc.description.abstractABSTRACT: The combination of tungsten carbide and copper as a thermal barrier could effectively reduce the thermal mismatch between tungsten and copper alloy, which are proposed as base armour and heat sink, respectively, in the divertor of future fusion reactors. Furthermore, since the optimum operating temperature windows for these divertor materials do not overlap, a compatible thermal barrier interlayer between them is required to guarantee a smooth thermal transition, which in addition may mitigate radiation damage. The aim of this work is to study the thermo-mechanical properties of WC-Cu cermets fabricated by hot pressing. Focus is placed on the temperature effect and composition dependence, as the volume fraction of copper varies from 25 to 50 and 75 vol%. To explore this behaviour, fracture experiments are performed within a temperature range from room temperature to 800 degrees C under vacuum. In addition, elastic modulus and thermal expansion coefficient are estimated from these tests. Results reveal a strong dependence of the performance on temperature and on the volume fraction of copper and, surprisingly, a slight percent of Cu (25 vol%) can effectively reduce the large difference in thermal expansion between tungsten and copper alloy, which is a critical point for in service applications. The thermal performance of these materials, together with their mechanical properties could indeed reduce the heat transfer from the PFM to the underlying element while supporting the high thermal stresses of the joint. Thus, the presence of these cermets could allow the reactor to operate above the ductile to brittle transition temperature of tungsten, without compromising the underlying materials.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationTejado, E.; Dias, M.; Correia, J.B...[et.al.]. - New WC-Cu thermal barriers for fusion applications: high temperature mechanical behaviour. In: Journal of Nuclear Materials, 2018, Vol. 498, p. 355-361pt_PT
dc.identifier.issn0022-3115
dc.identifier.urihttp://hdl.handle.net/10400.9/3075
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationPest-OE/SADG/LA0010/2013pt_PT
dc.relationPEST-OE/CTMUI0084/ 2011pt_PT
dc.relationIRRADIATION STUDIES OF TUNGSTEN BASED MATERIALS FOR FUSION APPLICATIONS
dc.relation.publisherversionhttps://doi.org/10.1016/j.jnucmat.2017.10.071pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectThermal propertiespt_PT
dc.subjectMechanical propertiespt_PT
dc.subjectTungstenpt_PT
dc.titleNew WC-Cu thermal barriers for fusion applications: high temperature mechanical behaviourpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleIRRADIATION STUDIES OF TUNGSTEN BASED MATERIALS FOR FUSION APPLICATIONS
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FCTM%2F100163%2F2008/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBPD%2F68663%2F2010/PT
oaire.citation.endPage361pt_PT
oaire.citation.startPage355pt_PT
oaire.citation.titleJournal of Nuclear Materialspt_PT
oaire.citation.volume498pt_PT
oaire.fundingStream3599-PPCDT
person.familyNameTejado
person.familyNameDias
person.familyNameCorreia
person.familyNamecarvalho
person.familyNameAlves
person.familyNamePastor
person.givenNameElena
person.givenNameMarta
person.givenNameJose B.
person.givenNamepatricia
person.givenNameEduardo
person.givenNameJose Ygnacio
person.identifier.ciencia-id0E13-5F70-9D8A
person.identifier.ciencia-idC31C-D617-6377
person.identifier.ciencia-id021E-97A3-F128
person.identifier.ciencia-id7911-8653-3CF4
person.identifier.orcid0000-0002-5240-6702
person.identifier.orcid0000-0001-6797-7711
person.identifier.orcid0000-0002-8314-0695
person.identifier.orcid0000-0002-5447-0409
person.identifier.orcid0000-0003-0633-8937
person.identifier.orcid0000-0003-3561-5999
person.identifier.ridC-1150-2009
person.identifier.scopus-author-id55837277500
person.identifier.scopus-author-id7202364148
person.identifier.scopus-author-id7102859165
person.identifier.scopus-author-id7201639528
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationd7b05251-c408-44ba-8bbd-a6754722444b
relation.isAuthorOfPublicationf2a43899-c4c2-4b2b-b2a2-d85bdceca9e2
relation.isAuthorOfPublication51557bd3-14c6-4246-b185-36f668c061dd
relation.isAuthorOfPublicationf722bc06-dafc-4341-86f8-b405987804a8
relation.isAuthorOfPublication5fd0d024-b79a-44c9-9c6b-dbeeb54395ec
relation.isAuthorOfPublication2ed6018e-e361-4bb1-95a4-83e1c6f61c8d
relation.isAuthorOfPublication.latestForDiscovery51557bd3-14c6-4246-b185-36f668c061dd
relation.isProjectOfPublication20517425-8535-4094-a902-f30133118ac0
relation.isProjectOfPublication7bd38fd6-8c86-4398-873a-63f9783aa196
relation.isProjectOfPublication.latestForDiscovery20517425-8535-4094-a902-f30133118ac0

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
JournalNuclearMaterials_Vol.498_355-361.pdf
Size:
153.07 KB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

ME - Artigos em revistas internacionais