Influence of Al content on the mechanical properties and thermal stability in protective and oxidation atmospheres of Zr–Cr–Al–N coatings

Detalhes bibliográficos
Autor(a) principal: Li, W. Z.
Data de Publicação: 2013
Outros Autores: Liu, H. W., Evaristo, M., Polcar, T., Cavaleiro, A.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10316/27398
https://doi.org/10.1016/j.surfcoat.2013.09.052
Resumo: Tools have been used under very high temperature in recent decades. Therefore, coatings on tools are required to be thermally stable and excellent in oxidation-resistance. The introduction of Al into nitride coatings was considered as an effective way to improve the coating oxidation-resistance and thermal stability. Quaternary Zr–Cr–Al–N coatings were deposited with increasing Al contents by d.c. reactive magnetron sputtering. The coatings were annealed at 800 and 900 °C for 1 h in Ar + H2 atmosphere and exposed at 700 °C for 2 h and 1200 °C for 1 h in air, respectively. The hardness, Young's modulus, adhesive/cohesive strength and residual stress of as-deposited and annealed coatings were characterized by nanoindentation, scratch test and curvature measurement method. The results showed that the coating hardness and Young's modulus increased after post-annealing at 800 °C or 900 °C; the adhesive/cohesive strength decreased after annealing due to the substrate softening. The residual stress decreased after annealing and the lowest stress status depended on the crystallinity degree of the coating. XRD patterns showed mainly Cr2O3 formed in the Al-free, and a mixture of oxides of ZrO2 and Al2O3 in the high Al coatings after 1200 °C/1 h oxidation. N is still detected in the coatings, which indicates that the coatings are not fully oxidized being exposed to 700 °C for 2 h.
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spelling Influence of Al content on the mechanical properties and thermal stability in protective and oxidation atmospheres of Zr–Cr–Al–N coatingsZr–Cr–Al–N coatingsMechanical propertiesThermal annealingOxidationMicrostructuresTools have been used under very high temperature in recent decades. Therefore, coatings on tools are required to be thermally stable and excellent in oxidation-resistance. The introduction of Al into nitride coatings was considered as an effective way to improve the coating oxidation-resistance and thermal stability. Quaternary Zr–Cr–Al–N coatings were deposited with increasing Al contents by d.c. reactive magnetron sputtering. The coatings were annealed at 800 and 900 °C for 1 h in Ar + H2 atmosphere and exposed at 700 °C for 2 h and 1200 °C for 1 h in air, respectively. The hardness, Young's modulus, adhesive/cohesive strength and residual stress of as-deposited and annealed coatings were characterized by nanoindentation, scratch test and curvature measurement method. The results showed that the coating hardness and Young's modulus increased after post-annealing at 800 °C or 900 °C; the adhesive/cohesive strength decreased after annealing due to the substrate softening. The residual stress decreased after annealing and the lowest stress status depended on the crystallinity degree of the coating. XRD patterns showed mainly Cr2O3 formed in the Al-free, and a mixture of oxides of ZrO2 and Al2O3 in the high Al coatings after 1200 °C/1 h oxidation. N is still detected in the coatings, which indicates that the coatings are not fully oxidized being exposed to 700 °C for 2 h.Elsevier2013-12-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/27398http://hdl.handle.net/10316/27398https://doi.org/10.1016/j.surfcoat.2013.09.052engLI, W. Z. [et. al] - Influence of Al content on the mechanical properties and thermal stability in protective and oxidation atmospheres of Zr–Cr–Al–N coatings. "Surface and Coatings Technology". ISSN 0257-8972. Vol. 236 (2013) p. 239-2450257-8972http://www.sciencedirect.com/science/article/pii/S0257897213009134Li, W. Z.Liu, H. W.Evaristo, M.Polcar, T.Cavaleiro, A.info: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:RCAAP2020-05-29T09:42:33Zoai:estudogeral.uc.pt:10316/27398Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:50:16.933131Repositório 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 Influence of Al content on the mechanical properties and thermal stability in protective and oxidation atmospheres of Zr–Cr–Al–N coatings
title Influence of Al content on the mechanical properties and thermal stability in protective and oxidation atmospheres of Zr–Cr–Al–N coatings
spellingShingle Influence of Al content on the mechanical properties and thermal stability in protective and oxidation atmospheres of Zr–Cr–Al–N coatings
Li, W. Z.
Zr–Cr–Al–N coatings
Mechanical properties
Thermal annealing
Oxidation
Microstructures
title_short Influence of Al content on the mechanical properties and thermal stability in protective and oxidation atmospheres of Zr–Cr–Al–N coatings
title_full Influence of Al content on the mechanical properties and thermal stability in protective and oxidation atmospheres of Zr–Cr–Al–N coatings
title_fullStr Influence of Al content on the mechanical properties and thermal stability in protective and oxidation atmospheres of Zr–Cr–Al–N coatings
title_full_unstemmed Influence of Al content on the mechanical properties and thermal stability in protective and oxidation atmospheres of Zr–Cr–Al–N coatings
title_sort Influence of Al content on the mechanical properties and thermal stability in protective and oxidation atmospheres of Zr–Cr–Al–N coatings
author Li, W. Z.
author_facet Li, W. Z.
Liu, H. W.
Evaristo, M.
Polcar, T.
Cavaleiro, A.
author_role author
author2 Liu, H. W.
Evaristo, M.
Polcar, T.
Cavaleiro, A.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Li, W. Z.
Liu, H. W.
Evaristo, M.
Polcar, T.
Cavaleiro, A.
dc.subject.por.fl_str_mv Zr–Cr–Al–N coatings
Mechanical properties
Thermal annealing
Oxidation
Microstructures
topic Zr–Cr–Al–N coatings
Mechanical properties
Thermal annealing
Oxidation
Microstructures
description Tools have been used under very high temperature in recent decades. Therefore, coatings on tools are required to be thermally stable and excellent in oxidation-resistance. The introduction of Al into nitride coatings was considered as an effective way to improve the coating oxidation-resistance and thermal stability. Quaternary Zr–Cr–Al–N coatings were deposited with increasing Al contents by d.c. reactive magnetron sputtering. The coatings were annealed at 800 and 900 °C for 1 h in Ar + H2 atmosphere and exposed at 700 °C for 2 h and 1200 °C for 1 h in air, respectively. The hardness, Young's modulus, adhesive/cohesive strength and residual stress of as-deposited and annealed coatings were characterized by nanoindentation, scratch test and curvature measurement method. The results showed that the coating hardness and Young's modulus increased after post-annealing at 800 °C or 900 °C; the adhesive/cohesive strength decreased after annealing due to the substrate softening. The residual stress decreased after annealing and the lowest stress status depended on the crystallinity degree of the coating. XRD patterns showed mainly Cr2O3 formed in the Al-free, and a mixture of oxides of ZrO2 and Al2O3 in the high Al coatings after 1200 °C/1 h oxidation. N is still detected in the coatings, which indicates that the coatings are not fully oxidized being exposed to 700 °C for 2 h.
publishDate 2013
dc.date.none.fl_str_mv 2013-12-15
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/10316/27398
http://hdl.handle.net/10316/27398
https://doi.org/10.1016/j.surfcoat.2013.09.052
url http://hdl.handle.net/10316/27398
https://doi.org/10.1016/j.surfcoat.2013.09.052
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv LI, W. Z. [et. al] - Influence of Al content on the mechanical properties and thermal stability in protective and oxidation atmospheres of Zr–Cr–Al–N coatings. "Surface and Coatings Technology". ISSN 0257-8972. Vol. 236 (2013) p. 239-245
0257-8972
http://www.sciencedirect.com/science/article/pii/S0257897213009134
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
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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