Thermal cyclic resistance and long term inter-diffusion properties of slurry aluminide coatings modified with Si

High temperature oxidation resistant aluminide coatings fail due to their inability to maintain a protective scale. The corresponding mechanism of protection is based on of forming a thin Al2O3 layer, which depends on the availability of Al at the interface with the intermetallic coating. However, t...

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Detalles Bibliográficos
Autores: Agüero, A., Landeira Ostergard, M. J., Hansson, A. N., Gutierrez, Marcos
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2022
País:España
Institución:Instituto Nacional de Técnica Aeroespacial (INTA)
Repositorio:DIGITAL.INTA Repositorio Digital del Instituto Nacional de Técnica Aeroespacial
OAI Identifier:oai:digital.inta.es:20.500.12666/879
Acceso en línea:https://www.sciencedirect.com/science/article/pii/S2666845922000034
http://hdl.handle.net/20.500.12666/879
Access Level:acceso abierto
Palabra clave:NiAl
Aluminide coating
Ni base super alloys
Slurry
Microstructure
Interdiffusion
Cyclic oxidation
Si effect
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spelling Thermal cyclic resistance and long term inter-diffusion properties of slurry aluminide coatings modified with SiAgüero, A.Landeira Ostergard, M. J.Hansson, A. N.Gutierrez, MarcosNiAlAluminide coatingNi base super alloysSlurryMicrostructureInterdiffusionCyclic oxidationSi effectHigh temperature oxidation resistant aluminide coatings fail due to their inability to maintain a protective scale. The corresponding mechanism of protection is based on of forming a thin Al2O3 layer, which depends on the availability of Al at the interface with the intermetallic coating. However, the Al content in the coating’s surface decreases with time at high temperatures due to interdiffusion with the substrate and/or frequent regeneration of the protective Al2O3 scale when it spalls. Si addition is known to enhance the life of Ni aluminide coatings under certain corrosion environments. In an effort to develop a stable, long lasting coating for industrial components exposed to metal dusting, diffusion aluminide coating has been produced by applying Al-Si slurries of various compositions on alloy 601. Aluminide coatings were prepared by applying a water base, Al slurry to which 1, 10 and 20 wt. % of Si were added, followed by a diffusion heat treatment. The microstructures of the coatings were similar, exhibiting an outer layer consisting of an Al-rich -NiAl matrix, an almost stoichiometric -NiAl inner layer and an interdiffusion zone between the coating and the alloy. Thermal cyclic tests in air at 1100 °C have demonstrated good adhesion and stability of all coatings. In addition, long term isothermal tests at 850 °C for up to 3 months in air showed high oxidation resistance of the coating but different degree of coating degradation depending on the composition. The coating with the lowest Si addition was the most stable.The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.PeerreviewElsevierInstituto Nacional de Técnica Aeroespacial (INTA)202320232022info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501application/pdfhttps://www.sciencedirect.com/science/article/pii/S2666845922000034http://hdl.handle.net/20.500.12666/879reponame:DIGITAL.INTA Repositorio Digital del Instituto Nacional de Técnica Aeroespacialinstname:Instituto Nacional de Técnica Aeroespacial (INTA)InglésAttribution-NonCommercial-NoDerivatives 4.0 International© 2022 The Author(s). Published by Elsevier B.V.https://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:digital.inta.es:20.500.12666/8792026-06-23T12:46:37Z
dc.title.none.fl_str_mv Thermal cyclic resistance and long term inter-diffusion properties of slurry aluminide coatings modified with Si
title Thermal cyclic resistance and long term inter-diffusion properties of slurry aluminide coatings modified with Si
spellingShingle Thermal cyclic resistance and long term inter-diffusion properties of slurry aluminide coatings modified with Si
Agüero, A.
NiAl
Aluminide coating
Ni base super alloys
Slurry
Microstructure
Interdiffusion
Cyclic oxidation
Si effect
title_short Thermal cyclic resistance and long term inter-diffusion properties of slurry aluminide coatings modified with Si
title_full Thermal cyclic resistance and long term inter-diffusion properties of slurry aluminide coatings modified with Si
title_fullStr Thermal cyclic resistance and long term inter-diffusion properties of slurry aluminide coatings modified with Si
title_full_unstemmed Thermal cyclic resistance and long term inter-diffusion properties of slurry aluminide coatings modified with Si
title_sort Thermal cyclic resistance and long term inter-diffusion properties of slurry aluminide coatings modified with Si
dc.creator.none.fl_str_mv Agüero, A.
Landeira Ostergard, M. J.
Hansson, A. N.
Gutierrez, Marcos
author Agüero, A.
author_facet Agüero, A.
Landeira Ostergard, M. J.
Hansson, A. N.
Gutierrez, Marcos
author_role author
author2 Landeira Ostergard, M. J.
Hansson, A. N.
Gutierrez, Marcos
author2_role author
author
author
dc.contributor.none.fl_str_mv Instituto Nacional de Técnica Aeroespacial (INTA)
dc.subject.none.fl_str_mv NiAl
Aluminide coating
Ni base super alloys
Slurry
Microstructure
Interdiffusion
Cyclic oxidation
Si effect
topic NiAl
Aluminide coating
Ni base super alloys
Slurry
Microstructure
Interdiffusion
Cyclic oxidation
Si effect
description High temperature oxidation resistant aluminide coatings fail due to their inability to maintain a protective scale. The corresponding mechanism of protection is based on of forming a thin Al2O3 layer, which depends on the availability of Al at the interface with the intermetallic coating. However, the Al content in the coating’s surface decreases with time at high temperatures due to interdiffusion with the substrate and/or frequent regeneration of the protective Al2O3 scale when it spalls. Si addition is known to enhance the life of Ni aluminide coatings under certain corrosion environments. In an effort to develop a stable, long lasting coating for industrial components exposed to metal dusting, diffusion aluminide coating has been produced by applying Al-Si slurries of various compositions on alloy 601. Aluminide coatings were prepared by applying a water base, Al slurry to which 1, 10 and 20 wt. % of Si were added, followed by a diffusion heat treatment. The microstructures of the coatings were similar, exhibiting an outer layer consisting of an Al-rich -NiAl matrix, an almost stoichiometric -NiAl inner layer and an interdiffusion zone between the coating and the alloy. Thermal cyclic tests in air at 1100 °C have demonstrated good adhesion and stability of all coatings. In addition, long term isothermal tests at 850 °C for up to 3 months in air showed high oxidation resistance of the coating but different degree of coating degradation depending on the composition. The coating with the lowest Si addition was the most stable.
publishDate 2022
dc.date.none.fl_str_mv 2022
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://www.sciencedirect.com/science/article/pii/S2666845922000034
http://hdl.handle.net/20.500.12666/879
url https://www.sciencedirect.com/science/article/pii/S2666845922000034
http://hdl.handle.net/20.500.12666/879
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv Attribution-NonCommercial-NoDerivatives 4.0 International
© 2022 The Author(s). Published by Elsevier B.V.
https://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution-NonCommercial-NoDerivatives 4.0 International
© 2022 The Author(s). Published by Elsevier B.V.
https://creativecommons.org/licenses/by-nc-nd/4.0/
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:DIGITAL.INTA Repositorio Digital del Instituto Nacional de Técnica Aeroespacial
instname:Instituto Nacional de Técnica Aeroespacial (INTA)
instname_str Instituto Nacional de Técnica Aeroespacial (INTA)
reponame_str DIGITAL.INTA Repositorio Digital del Instituto Nacional de Técnica Aeroespacial
collection DIGITAL.INTA Repositorio Digital del Instituto Nacional de Técnica Aeroespacial
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300719

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