Improving the oxidation resistance of AlCrN coatings by tailoring chromium out-diffusion

In this work, we have studied the improvement on the oxidation resistance of AlCrN-based coatings by adding a subsurface titanium nitride barrier layer. Since oxidation is interrelated with the inward diffusion of oxygen into the surface of AlxCr1−xN (x = 0.70) coatings and the outward diffusion of...

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Autores: Escobar-Galindo, Ramón, Endrino, José Luis, Martínez, R., Albella Martín, José María
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2010
País:España
Institución:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/147432
Acceso en línea:https://hdl.handle.net/11441/147432
https://doi.org/10.1016/j.sab.2010.09.005
Access Level:acceso abierto
Palabra clave:GDOES
AlCrN
Oxidation
Diffusion barrier
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spelling Improving the oxidation resistance of AlCrN coatings by tailoring chromium out-diffusionEscobar-Galindo, RamónEndrino, José LuisMartínez, R.Albella Martín, José MaríaGDOESAlCrNOxidationDiffusion barrierIn this work, we have studied the improvement on the oxidation resistance of AlCrN-based coatings by adding a subsurface titanium nitride barrier layer. Since oxidation is interrelated with the inward diffusion of oxygen into the surface of AlxCr1−xN (x = 0.70) coatings and the outward diffusion of Cr to the surface, the oxidation behaviour of the aluminium-rich AlCrN coatings can be tuned by designing the coating in an appropriate layered structure. The buried depth of the embedded layer and the oxidation time were varied, and the changes in the AlCrN/TiN depth composition profiles and surface oxidation stoichiometry were analysed by means of Glow Discharge Optical Emission Spectroscopy (GDOES) and Cross Sectional SEM (X-SEM) maps. It was observed that when a TiN diffusion barrier of 300 nm was deposited near the top surface (500 nm from the surface) the inhibition of the inward diffusion of oxygen and formation of beneficial alumina surface layers was promoted and consequently an increase of the oxidation resistance is achieved. This is explained in terms of a limited surplus of chromium from the coating to the surface. This was corroborated after performing experiments using CrN as embedded barrier layer which resulted in a continuous surplus of chromium to the surface and the formation of Cr-rich oxides. GDOES, in combination with X-SEM elemental maps, was proved to be a fast and accurate technique to monitor composition in-depth changes during oxidation, providing unique information regarding the oxide structure formation.Ministerio de Ciencia e Innovación CSD2008-00023 (FUNCOAT)ScienceDirectFísica Aplicada IMinisterio de Ciencia e Innovación (MICIN). España2010info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/11441/147432https://doi.org/10.1016/j.sab.2010.09.005reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésSpectrochimica Acta Part B: Atomic Spectroscopy, 65 (11), 950-958.CSD2008-00023 (FUNCOAT)https://www.sciencedirect.com/science/article/pii/S0584854710002648info:eu-repo/semantics/openAccessoai:idus.us.es:11441/1474322026-06-17T12:51:07Z
dc.title.none.fl_str_mv Improving the oxidation resistance of AlCrN coatings by tailoring chromium out-diffusion
title Improving the oxidation resistance of AlCrN coatings by tailoring chromium out-diffusion
spellingShingle Improving the oxidation resistance of AlCrN coatings by tailoring chromium out-diffusion
Escobar-Galindo, Ramón
GDOES
AlCrN
Oxidation
Diffusion barrier
title_short Improving the oxidation resistance of AlCrN coatings by tailoring chromium out-diffusion
title_full Improving the oxidation resistance of AlCrN coatings by tailoring chromium out-diffusion
title_fullStr Improving the oxidation resistance of AlCrN coatings by tailoring chromium out-diffusion
title_full_unstemmed Improving the oxidation resistance of AlCrN coatings by tailoring chromium out-diffusion
title_sort Improving the oxidation resistance of AlCrN coatings by tailoring chromium out-diffusion
dc.creator.none.fl_str_mv Escobar-Galindo, Ramón
Endrino, José Luis
Martínez, R.
Albella Martín, José María
author Escobar-Galindo, Ramón
author_facet Escobar-Galindo, Ramón
Endrino, José Luis
Martínez, R.
Albella Martín, José María
author_role author
author2 Endrino, José Luis
Martínez, R.
Albella Martín, José María
author2_role author
author
author
dc.contributor.none.fl_str_mv Física Aplicada I
Ministerio de Ciencia e Innovación (MICIN). España
dc.subject.none.fl_str_mv GDOES
AlCrN
Oxidation
Diffusion barrier
topic GDOES
AlCrN
Oxidation
Diffusion barrier
description In this work, we have studied the improvement on the oxidation resistance of AlCrN-based coatings by adding a subsurface titanium nitride barrier layer. Since oxidation is interrelated with the inward diffusion of oxygen into the surface of AlxCr1−xN (x = 0.70) coatings and the outward diffusion of Cr to the surface, the oxidation behaviour of the aluminium-rich AlCrN coatings can be tuned by designing the coating in an appropriate layered structure. The buried depth of the embedded layer and the oxidation time were varied, and the changes in the AlCrN/TiN depth composition profiles and surface oxidation stoichiometry were analysed by means of Glow Discharge Optical Emission Spectroscopy (GDOES) and Cross Sectional SEM (X-SEM) maps. It was observed that when a TiN diffusion barrier of 300 nm was deposited near the top surface (500 nm from the surface) the inhibition of the inward diffusion of oxygen and formation of beneficial alumina surface layers was promoted and consequently an increase of the oxidation resistance is achieved. This is explained in terms of a limited surplus of chromium from the coating to the surface. This was corroborated after performing experiments using CrN as embedded barrier layer which resulted in a continuous surplus of chromium to the surface and the formation of Cr-rich oxides. GDOES, in combination with X-SEM elemental maps, was proved to be a fast and accurate technique to monitor composition in-depth changes during oxidation, providing unique information regarding the oxide structure formation.
publishDate 2010
dc.date.none.fl_str_mv 2010
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/11441/147432
https://doi.org/10.1016/j.sab.2010.09.005
url https://hdl.handle.net/11441/147432
https://doi.org/10.1016/j.sab.2010.09.005
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Spectrochimica Acta Part B: Atomic Spectroscopy, 65 (11), 950-958.
CSD2008-00023 (FUNCOAT)
https://www.sciencedirect.com/science/article/pii/S0584854710002648
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv ScienceDirect
publisher.none.fl_str_mv ScienceDirect
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.300719

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