Large enhancement of thermal conductance at ambient and cryogenic temperatures by laser remelting of plasma-sprayed Al2O3 coatings on Cu

Joints of high thermal contact conductance and electrical insulation have been obtained by coating copper supports with thin alumina (Al2O3) layers (of 140–150 μm thickness). This has been achieved by a combination of plasma spraying process and the subsequent coating remelting by a near-Infrared (n...

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Autores: Cubero, Alvaro, Martinez, Elena, de la Fuente, German F., García Cano, Irene, Dosta Parras, Sergi, Angurel, Luis A.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/219017
Acceso en línea:https://hdl.handle.net/2445/219017
Access Level:acceso abierto
Palabra clave:Superconductivitat a altes temperatures
Revestiments
High temperature superconductivity
Coatings
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spelling Large enhancement of thermal conductance at ambient and cryogenic temperatures by laser remelting of plasma-sprayed Al2O3 coatings on CuCubero, AlvaroMartinez, Elenade la Fuente, German F.García Cano, IreneDosta Parras, SergiAngurel, Luis A.Superconductivitat a altes temperaturesRevestimentsHigh temperature superconductivityCoatingsJoints of high thermal contact conductance and electrical insulation have been obtained by coating copper supports with thin alumina (Al2O3) layers (of 140–150 μm thickness). This has been achieved by a combination of plasma spraying process and the subsequent coating remelting by a near-Infrared (n-IR) laser. With a proper optimization of the laser processing conditions, it is possible to transform the metastable γ-Al2O3 phase of the assprayed coatings to stable α-Al2O3, and to achieve denser alumina coatings. This results in a large enhancement of the thermal conductance of the joints, enabling their application as heat sinks at cryogenic and ambient temperatures. The process proposed in this work is scalable for the formation of alumina coatings on large metallic pieces of complex geometries. Elsevier Ltd.2025202520212025info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion11 p.application/pdfhttps://hdl.handle.net/2445/219017Articles publicats en revistes (Ciència dels Materials i Química Física)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.1016/j.materresbull.2021.111450Materials Research Bulletin, 2021, vol. 143, p. 1-11https://doi.org/10.1016/j.materresbull.2021.111450cc-by-nc-nd (c) Cubero, Alvaro, et al., 2021http://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:recercat.cat:2445/2190172026-05-29T05:05:01Z
dc.title.none.fl_str_mv Large enhancement of thermal conductance at ambient and cryogenic temperatures by laser remelting of plasma-sprayed Al2O3 coatings on Cu
title Large enhancement of thermal conductance at ambient and cryogenic temperatures by laser remelting of plasma-sprayed Al2O3 coatings on Cu
spellingShingle Large enhancement of thermal conductance at ambient and cryogenic temperatures by laser remelting of plasma-sprayed Al2O3 coatings on Cu
Cubero, Alvaro
Superconductivitat a altes temperatures
Revestiments
High temperature superconductivity
Coatings
title_short Large enhancement of thermal conductance at ambient and cryogenic temperatures by laser remelting of plasma-sprayed Al2O3 coatings on Cu
title_full Large enhancement of thermal conductance at ambient and cryogenic temperatures by laser remelting of plasma-sprayed Al2O3 coatings on Cu
title_fullStr Large enhancement of thermal conductance at ambient and cryogenic temperatures by laser remelting of plasma-sprayed Al2O3 coatings on Cu
title_full_unstemmed Large enhancement of thermal conductance at ambient and cryogenic temperatures by laser remelting of plasma-sprayed Al2O3 coatings on Cu
title_sort Large enhancement of thermal conductance at ambient and cryogenic temperatures by laser remelting of plasma-sprayed Al2O3 coatings on Cu
dc.creator.none.fl_str_mv Cubero, Alvaro
Martinez, Elena
de la Fuente, German F.
García Cano, Irene
Dosta Parras, Sergi
Angurel, Luis A.
author Cubero, Alvaro
author_facet Cubero, Alvaro
Martinez, Elena
de la Fuente, German F.
García Cano, Irene
Dosta Parras, Sergi
Angurel, Luis A.
author_role author
author2 Martinez, Elena
de la Fuente, German F.
García Cano, Irene
Dosta Parras, Sergi
Angurel, Luis A.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Superconductivitat a altes temperatures
Revestiments
High temperature superconductivity
Coatings
topic Superconductivitat a altes temperatures
Revestiments
High temperature superconductivity
Coatings
description Joints of high thermal contact conductance and electrical insulation have been obtained by coating copper supports with thin alumina (Al2O3) layers (of 140–150 μm thickness). This has been achieved by a combination of plasma spraying process and the subsequent coating remelting by a near-Infrared (n-IR) laser. With a proper optimization of the laser processing conditions, it is possible to transform the metastable γ-Al2O3 phase of the assprayed coatings to stable α-Al2O3, and to achieve denser alumina coatings. This results in a large enhancement of the thermal conductance of the joints, enabling their application as heat sinks at cryogenic and ambient temperatures. The process proposed in this work is scalable for the formation of alumina coatings on large metallic pieces of complex geometries. 
publishDate 2021
dc.date.none.fl_str_mv 2021
2025
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/219017
url https://hdl.handle.net/2445/219017
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1016/j.materresbull.2021.111450
Materials Research Bulletin, 2021, vol. 143, p. 1-11
https://doi.org/10.1016/j.materresbull.2021.111450
dc.rights.none.fl_str_mv cc-by-nc-nd (c) Cubero, Alvaro, et al., 2021
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by-nc-nd (c) Cubero, Alvaro, et al., 2021
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 11 p.
application/pdf
dc.publisher.none.fl_str_mv Elsevier Ltd.
publisher.none.fl_str_mv Elsevier Ltd.
dc.source.none.fl_str_mv Articles publicats en revistes (Ciència dels Materials i Química Física)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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