Fabricación de carburo de silicio poroso con capa densa para su aplicación en inserciones aislantes en canal para futuros reactores de fusión nuclear.

Within the project TECNO_FUS on CONSOLIDER- INGENIO 2010 program, a dual coolant blanket design is developing (DCLL = Dual Coolant Lithium Lead) for DEMO with Pb-15.7Li and He as coolant. It is a ferritic-martensitic steel with low activation as structural metrial cooled by He. The Pb-15.7Li acts as...

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Autor: Bereciartu-Andrés, A. (Ainhoa)|||/items/6a2a04d9-dfb9-4e88-b11c-25a3b99301ce
Tipo de documento: tese
Data de publicação:2014
País:España
Recursos:Universidad de Navarra
Repositório:Dadun. Depósito Académico Digital de la Universidad de Navarra
Idioma:inglês
OAI Identifier:oai:dadun.unav.edu:10171/37253
Acesso em linha:https://hdl.handle.net/10171/37253
Access Level:Acceso aberto
Palavra-chave:Corrosión por Pb-15.7Li.
Conductividad térmica.
Blanket Dual Coolant Lithium Lead.
Flow Channel Inserts.
SiC poroso.
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spelling Fabricación de carburo de silicio poroso con capa densa para su aplicación en inserciones aislantes en canal para futuros reactores de fusión nuclear.Bereciartu-Andrés, A. (Ainhoa)|||/items/6a2a04d9-dfb9-4e88-b11c-25a3b99301ceCorrosión por Pb-15.7Li.Conductividad térmica.Blanket Dual Coolant Lithium Lead.Flow Channel Inserts.SiC poroso.Within the project TECNO_FUS on CONSOLIDER- INGENIO 2010 program, a dual coolant blanket design is developing (DCLL = Dual Coolant Lithium Lead) for DEMO with Pb-15.7Li and He as coolant. It is a ferritic-martensitic steel with low activation as structural metrial cooled by He. The Pb-15.7Li acts as tritium breeder, neutron multiplier and coolant. The Pb-15.7Li outlet temperature has been as high as possible to achieve the highest possible efficiency, without exceeding the maximum temperature of steel. Due to the high magnetic fields produced in the region of the blanket, the Pb-15.7Li needs to be electrically insulated from the steel to reduce the magnetohydrodynamic pressure drop (MHD). Also, it should be thermially insulated from stell to avoid heat loss. This is one of the main functions of the Flow Channel Iserts (FCI), which also act as thermal insulator to maximize the Pb-15.7Li temperature, and thus, the efficiency. Silicon carbide is the main candidate material for FCI in the DLL blanket, due to its excellent thermal, mechanical and chemical stability at high temperatures, low thermal expansion, good thermal shock resistance, low corrosion by Pb-15.7Li, low activation and good resistance to neutron irradiation, low activation and good resistance to neutron irradiation. Porous SiC is one of the most attractive types of SiC under consideration, since it is expected to achieve the required properties following a simple and inexpensive manufacturing route compared to SiCf/SiC materials. To avoid tritium permeation and corrosion by Pb-15.7Li, a dense coating must be applied on the porous SiC surface. In this work the results obtained in the production of porous SiC powder metallurgical route by pressureless sintering are presented. For the manufacture of porous SiC different particle size starting SiC and carbonaceous powders, with and without additives, have been used. A study on liquid phase sintering by varying sintering temperature and time is performed. Carbonaceus powders are used as poreformers by their burnout during oxidation after sintering. A study on the effect of different processing parameters on final relevant properties of porous SiC has been carried out and the two most promising porous SiC materials were selected on the basis of lowest thermal conductivity (11-13 W/mK a 700 °C) and highest flexural strength (100-140 MPa). The two selected materials are coated with a 30 μm thick CVD SiC layer. Electrical conductivity was measured at CIEMAT before and after irradiation in a Van de Graaff accelerator with 1.8 MeV electrons up to 130 MGy, and values < 20 S/m at 400°C are obtained. Corrosion tests under static Pb-15.7Li are conducted at 700C during 1032 houers under 99% Ar + 1% H2 atmosphere at IQS; even though the used Pb-17.5Li has very high O content, the 30 μm CVD SiC layer provide partial protection against corrosion.Servicio de Publicaciones. Universidad de Navarra.García-Rosales-Vázquez, C. (Carmen)Ordas-Mur, N. (Nerea)Dadun. Depósito Académico Digital Universidad de Navarra20152015-01-1220142014-01-0120142014-01-0120142014-11-28doctoral thesishttp://purl.org/coar/resource_type/c_db06info:eu-repo/semantics/doctoralThesisapplication/pdfhttps://hdl.handle.net/10171/37253reponame:Dadun. Depósito Académico Digital de la Universidad de Navarrainstname:Universidad de NavarraInglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:dadun.unav.edu:10171/372532026-06-21T12:47:57Z
dc.title.none.fl_str_mv Fabricación de carburo de silicio poroso con capa densa para su aplicación en inserciones aislantes en canal para futuros reactores de fusión nuclear.
title Fabricación de carburo de silicio poroso con capa densa para su aplicación en inserciones aislantes en canal para futuros reactores de fusión nuclear.
spellingShingle Fabricación de carburo de silicio poroso con capa densa para su aplicación en inserciones aislantes en canal para futuros reactores de fusión nuclear.
Bereciartu-Andrés, A. (Ainhoa)|||/items/6a2a04d9-dfb9-4e88-b11c-25a3b99301ce
Corrosión por Pb-15.7Li.
Conductividad térmica.
Blanket Dual Coolant Lithium Lead.
Flow Channel Inserts.
SiC poroso.
title_short Fabricación de carburo de silicio poroso con capa densa para su aplicación en inserciones aislantes en canal para futuros reactores de fusión nuclear.
title_full Fabricación de carburo de silicio poroso con capa densa para su aplicación en inserciones aislantes en canal para futuros reactores de fusión nuclear.
title_fullStr Fabricación de carburo de silicio poroso con capa densa para su aplicación en inserciones aislantes en canal para futuros reactores de fusión nuclear.
title_full_unstemmed Fabricación de carburo de silicio poroso con capa densa para su aplicación en inserciones aislantes en canal para futuros reactores de fusión nuclear.
title_sort Fabricación de carburo de silicio poroso con capa densa para su aplicación en inserciones aislantes en canal para futuros reactores de fusión nuclear.
dc.creator.none.fl_str_mv Bereciartu-Andrés, A. (Ainhoa)|||/items/6a2a04d9-dfb9-4e88-b11c-25a3b99301ce
author Bereciartu-Andrés, A. (Ainhoa)|||/items/6a2a04d9-dfb9-4e88-b11c-25a3b99301ce
author_facet Bereciartu-Andrés, A. (Ainhoa)|||/items/6a2a04d9-dfb9-4e88-b11c-25a3b99301ce
author_role author
dc.contributor.none.fl_str_mv García-Rosales-Vázquez, C. (Carmen)
Ordas-Mur, N. (Nerea)
Dadun. Depósito Académico Digital Universidad de Navarra
dc.subject.none.fl_str_mv Corrosión por Pb-15.7Li.
Conductividad térmica.
Blanket Dual Coolant Lithium Lead.
Flow Channel Inserts.
SiC poroso.
topic Corrosión por Pb-15.7Li.
Conductividad térmica.
Blanket Dual Coolant Lithium Lead.
Flow Channel Inserts.
SiC poroso.
description Within the project TECNO_FUS on CONSOLIDER- INGENIO 2010 program, a dual coolant blanket design is developing (DCLL = Dual Coolant Lithium Lead) for DEMO with Pb-15.7Li and He as coolant. It is a ferritic-martensitic steel with low activation as structural metrial cooled by He. The Pb-15.7Li acts as tritium breeder, neutron multiplier and coolant. The Pb-15.7Li outlet temperature has been as high as possible to achieve the highest possible efficiency, without exceeding the maximum temperature of steel. Due to the high magnetic fields produced in the region of the blanket, the Pb-15.7Li needs to be electrically insulated from the steel to reduce the magnetohydrodynamic pressure drop (MHD). Also, it should be thermially insulated from stell to avoid heat loss. This is one of the main functions of the Flow Channel Iserts (FCI), which also act as thermal insulator to maximize the Pb-15.7Li temperature, and thus, the efficiency. Silicon carbide is the main candidate material for FCI in the DLL blanket, due to its excellent thermal, mechanical and chemical stability at high temperatures, low thermal expansion, good thermal shock resistance, low corrosion by Pb-15.7Li, low activation and good resistance to neutron irradiation, low activation and good resistance to neutron irradiation. Porous SiC is one of the most attractive types of SiC under consideration, since it is expected to achieve the required properties following a simple and inexpensive manufacturing route compared to SiCf/SiC materials. To avoid tritium permeation and corrosion by Pb-15.7Li, a dense coating must be applied on the porous SiC surface. In this work the results obtained in the production of porous SiC powder metallurgical route by pressureless sintering are presented. For the manufacture of porous SiC different particle size starting SiC and carbonaceous powders, with and without additives, have been used. A study on liquid phase sintering by varying sintering temperature and time is performed. Carbonaceus powders are used as poreformers by their burnout during oxidation after sintering. A study on the effect of different processing parameters on final relevant properties of porous SiC has been carried out and the two most promising porous SiC materials were selected on the basis of lowest thermal conductivity (11-13 W/mK a 700 °C) and highest flexural strength (100-140 MPa). The two selected materials are coated with a 30 μm thick CVD SiC layer. Electrical conductivity was measured at CIEMAT before and after irradiation in a Van de Graaff accelerator with 1.8 MeV electrons up to 130 MGy, and values < 20 S/m at 400°C are obtained. Corrosion tests under static Pb-15.7Li are conducted at 700C during 1032 houers under 99% Ar + 1% H2 atmosphere at IQS; even though the used Pb-17.5Li has very high O content, the 30 μm CVD SiC layer provide partial protection against corrosion.
publishDate 2014
dc.date.none.fl_str_mv 2014
2014-01-01
2014
2014-01-01
2014
2014-11-28
2015
2015-01-12
dc.type.none.fl_str_mv doctoral thesis
http://purl.org/coar/resource_type/c_db06
dc.type.openaire.fl_str_mv info:eu-repo/semantics/doctoralThesis
format doctoralThesis
dc.identifier.none.fl_str_mv https://hdl.handle.net/10171/37253
url https://hdl.handle.net/10171/37253
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Servicio de Publicaciones. Universidad de Navarra.
publisher.none.fl_str_mv Servicio de Publicaciones. Universidad de Navarra.
dc.source.none.fl_str_mv reponame:Dadun. Depósito Académico Digital de la Universidad de Navarra
instname:Universidad de Navarra
instname_str Universidad de Navarra
reponame_str Dadun. Depósito Académico Digital de la Universidad de Navarra
collection Dadun. Depósito Académico Digital de la Universidad de Navarra
repository.name.fl_str_mv
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