New WC-Cu composites for the divertor in fusion reactors
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.9/3182 |
Resumo: | ABSTRACT: The requirements for the divertor components of future fusion reactors are challenging and therefore a stimulus for the development of new materials. In this paper, WC-Cu composites are studied for use as thermal barrier between the plasma facing tungsten tiles and the copper-based heat sink of the divertor. Composite materials with 50% vol. WC were prepared by hot pressing and characterized in terms of microstructure, density, expansion coefficient, elastic modulus, Young's modulus and thermal diffusivity. The produced materials consisted of WC particles homogeneously dispersed in a Cu matrix with densifications between 88% and 98%. The sample with WC particles coated with Cu evidenced the highest densification. The thermal diffusivity was significantly lower than that of pure copper or tungsten. The sample with higher densification exhibits a low value of Young's modulus (however, it is higher compared to pure copper), and an average linear thermal expansion coefficient of 13.6 x 10(-6) degrees C-1 in a temperature range between 100 degrees C and 550 degrees C. To estimate the behaviour of this composite in actual conditions, a monoblock of the divertor in extreme conditions was modelled. The results predict that while the use of WC-Cu interlayer leads to an increase of 190 degrees C on the temperature of the upper part of the monoblock when compared to a pure Cu interlayer, the composite will improve and reduce significantly the cold-state stress between this interlayer and the tungsten. |
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New WC-Cu composites for the divertor in fusion reactorsTungstenThermal propertiesMechanical propertiesThermal barriersModellingDensificationABSTRACT: The requirements for the divertor components of future fusion reactors are challenging and therefore a stimulus for the development of new materials. In this paper, WC-Cu composites are studied for use as thermal barrier between the plasma facing tungsten tiles and the copper-based heat sink of the divertor. Composite materials with 50% vol. WC were prepared by hot pressing and characterized in terms of microstructure, density, expansion coefficient, elastic modulus, Young's modulus and thermal diffusivity. The produced materials consisted of WC particles homogeneously dispersed in a Cu matrix with densifications between 88% and 98%. The sample with WC particles coated with Cu evidenced the highest densification. The thermal diffusivity was significantly lower than that of pure copper or tungsten. The sample with higher densification exhibits a low value of Young's modulus (however, it is higher compared to pure copper), and an average linear thermal expansion coefficient of 13.6 x 10(-6) degrees C-1 in a temperature range between 100 degrees C and 550 degrees C. To estimate the behaviour of this composite in actual conditions, a monoblock of the divertor in extreme conditions was modelled. The results predict that while the use of WC-Cu interlayer leads to an increase of 190 degrees C on the temperature of the upper part of the monoblock when compared to a pure Cu interlayer, the composite will improve and reduce significantly the cold-state stress between this interlayer and the tungsten.ElsevierRepositório do LNEGDias, MartaPinhão, N.Faustino, R.Martins, RicardoRamos, A. S.Vieira, M. T.Correia, J.B.Camacho, E.Fernandes, F. M. BrazNunes, B.Almeida, AméliaMardolcar, U. V.Alves, E.2020-03-16T12:18:19Z20192019-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.9/3182engDias, M... [et.al.] - New WC-Cu composites for the divertor in fusion reactors. In: Journal of Nuclear Materials, 2019, Vol. 521, p. 31-370022-311510.1016/j.jnucmat.2019.04.026info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-08-13T06:26:51Zoai:repositorio.lneg.pt:10400.9/3182Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:36:24.955397Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
New WC-Cu composites for the divertor in fusion reactors |
title |
New WC-Cu composites for the divertor in fusion reactors |
spellingShingle |
New WC-Cu composites for the divertor in fusion reactors Dias, Marta Tungsten Thermal properties Mechanical properties Thermal barriers Modelling Densification |
title_short |
New WC-Cu composites for the divertor in fusion reactors |
title_full |
New WC-Cu composites for the divertor in fusion reactors |
title_fullStr |
New WC-Cu composites for the divertor in fusion reactors |
title_full_unstemmed |
New WC-Cu composites for the divertor in fusion reactors |
title_sort |
New WC-Cu composites for the divertor in fusion reactors |
author |
Dias, Marta |
author_facet |
Dias, Marta Pinhão, N. Faustino, R. Martins, Ricardo Ramos, A. S. Vieira, M. T. Correia, J.B. Camacho, E. Fernandes, F. M. Braz Nunes, B. Almeida, Amélia Mardolcar, U. V. Alves, E. |
author_role |
author |
author2 |
Pinhão, N. Faustino, R. Martins, Ricardo Ramos, A. S. Vieira, M. T. Correia, J.B. Camacho, E. Fernandes, F. M. Braz Nunes, B. Almeida, Amélia Mardolcar, U. V. Alves, E. |
author2_role |
author author author author author author author author author author author author |
dc.contributor.none.fl_str_mv |
Repositório do LNEG |
dc.contributor.author.fl_str_mv |
Dias, Marta Pinhão, N. Faustino, R. Martins, Ricardo Ramos, A. S. Vieira, M. T. Correia, J.B. Camacho, E. Fernandes, F. M. Braz Nunes, B. Almeida, Amélia Mardolcar, U. V. Alves, E. |
dc.subject.por.fl_str_mv |
Tungsten Thermal properties Mechanical properties Thermal barriers Modelling Densification |
topic |
Tungsten Thermal properties Mechanical properties Thermal barriers Modelling Densification |
description |
ABSTRACT: The requirements for the divertor components of future fusion reactors are challenging and therefore a stimulus for the development of new materials. In this paper, WC-Cu composites are studied for use as thermal barrier between the plasma facing tungsten tiles and the copper-based heat sink of the divertor. Composite materials with 50% vol. WC were prepared by hot pressing and characterized in terms of microstructure, density, expansion coefficient, elastic modulus, Young's modulus and thermal diffusivity. The produced materials consisted of WC particles homogeneously dispersed in a Cu matrix with densifications between 88% and 98%. The sample with WC particles coated with Cu evidenced the highest densification. The thermal diffusivity was significantly lower than that of pure copper or tungsten. The sample with higher densification exhibits a low value of Young's modulus (however, it is higher compared to pure copper), and an average linear thermal expansion coefficient of 13.6 x 10(-6) degrees C-1 in a temperature range between 100 degrees C and 550 degrees C. To estimate the behaviour of this composite in actual conditions, a monoblock of the divertor in extreme conditions was modelled. The results predict that while the use of WC-Cu interlayer leads to an increase of 190 degrees C on the temperature of the upper part of the monoblock when compared to a pure Cu interlayer, the composite will improve and reduce significantly the cold-state stress between this interlayer and the tungsten. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019 2019-01-01T00:00:00Z 2020-03-16T12:18:19Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.9/3182 |
url |
http://hdl.handle.net/10400.9/3182 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Dias, M... [et.al.] - New WC-Cu composites for the divertor in fusion reactors. In: Journal of Nuclear Materials, 2019, Vol. 521, p. 31-37 0022-3115 10.1016/j.jnucmat.2019.04.026 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799130230157213696 |