Nb–C thin films prepared by DC-MS and HiPIMS: Synthesis, structure, and tribomechanical properties

Nanostructured Nb-C thin films were prepared by direct current magnetron sputtering (DC-MS) and high-power impulse magnetron sputtering (HiPIMS). The films were characterized in depth by X-ray diffraction (XRD), grazing incidence X-ray diffraction, scanning electron microscopy, atomic force microsco...

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Detalles Bibliográficos
Autores: Sala, N., Abad, Manuel D., Sánchez-López, J.C., Caro, J., Colominas, C.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2021
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/251392
Acceso en línea:http://hdl.handle.net/10261/251392
Access Level:acceso abierto
Palabra clave:Physical Vapor Deposition
Sputtering
Nanocomposites
Nb–C Films
HiPIMS
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spelling Nb–C thin films prepared by DC-MS and HiPIMS: Synthesis, structure, and tribomechanical propertiesSala, N.Abad, Manuel D.Sánchez-López, J.C.Caro, J.Colominas, C.Physical Vapor DepositionSputteringNanocompositesNb–C FilmsHiPIMSNanostructured Nb-C thin films were prepared by direct current magnetron sputtering (DC-MS) and high-power impulse magnetron sputtering (HiPIMS). The films were characterized in depth by X-ray diffraction (XRD), grazing incidence X-ray diffraction, scanning electron microscopy, atomic force microscopy, electron probe microanalysis, and Raman spectroscopy. The mechanical properties were measured by nanoindentation, and the tribological properties were measured by pin-on-disk tests in ambient air. The wear tracks and ball scars were analyzed by Raman spectroscopy to elucidate the tribochemical reactions that occurred at the contact area and to determine the wear mechanism for each specimen type. The thermal stability of the coatings was studied up to 1000 °C using Raman spectroscopy and XRD. The samples prepared by DC-MS were very dense, and the phase composition changed from purely nanocrystalline (Nb2C and NbC) to a mixture of NbC crystals embedded in an amorphous carbon-based matrix (NbC/a-C(:H)). However, the samples prepared by HiPIMS developed a marked columnar morphology with a NbC/a-C(:H) nanocomposite structure. The hardness values ranged from 11 to 20 GPa depending on the deposition technique and the amount of the soft a-C(:H) phase present in the sample. The tribological properties of all the coatings were remarkably good when the carbon content was approximately 50 at.%. The formation of a lubricating sp2-rich C tribofilm between the ball and coating during the pin-on-disk tests was observed by Raman spectroscopy. The tribofilm formed preferentially on the samples prepared by HiPIMS, which had higher C contents. At 750 °C, the degradation of the NbC phases resulted in the formation of an additional a-C phase and niobium oxidesPeer reviewedElsevierLa CaixaGeneralitat de CatalunyaConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202120212021info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/251392reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.1016/j.surfcoat.2021.127569Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2513922026-05-22T06:33:51Z
dc.title.none.fl_str_mv Nb–C thin films prepared by DC-MS and HiPIMS: Synthesis, structure, and tribomechanical properties
title Nb–C thin films prepared by DC-MS and HiPIMS: Synthesis, structure, and tribomechanical properties
spellingShingle Nb–C thin films prepared by DC-MS and HiPIMS: Synthesis, structure, and tribomechanical properties
Sala, N.
Physical Vapor Deposition
Sputtering
Nanocomposites
Nb–C Films
HiPIMS
title_short Nb–C thin films prepared by DC-MS and HiPIMS: Synthesis, structure, and tribomechanical properties
title_full Nb–C thin films prepared by DC-MS and HiPIMS: Synthesis, structure, and tribomechanical properties
title_fullStr Nb–C thin films prepared by DC-MS and HiPIMS: Synthesis, structure, and tribomechanical properties
title_full_unstemmed Nb–C thin films prepared by DC-MS and HiPIMS: Synthesis, structure, and tribomechanical properties
title_sort Nb–C thin films prepared by DC-MS and HiPIMS: Synthesis, structure, and tribomechanical properties
dc.creator.none.fl_str_mv Sala, N.
Abad, Manuel D.
Sánchez-López, J.C.
Caro, J.
Colominas, C.
author Sala, N.
author_facet Sala, N.
Abad, Manuel D.
Sánchez-López, J.C.
Caro, J.
Colominas, C.
author_role author
author2 Abad, Manuel D.
Sánchez-López, J.C.
Caro, J.
Colominas, C.
author2_role author
author
author
author
dc.contributor.none.fl_str_mv La Caixa
Generalitat de Catalunya
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Physical Vapor Deposition
Sputtering
Nanocomposites
Nb–C Films
HiPIMS
topic Physical Vapor Deposition
Sputtering
Nanocomposites
Nb–C Films
HiPIMS
description Nanostructured Nb-C thin films were prepared by direct current magnetron sputtering (DC-MS) and high-power impulse magnetron sputtering (HiPIMS). The films were characterized in depth by X-ray diffraction (XRD), grazing incidence X-ray diffraction, scanning electron microscopy, atomic force microscopy, electron probe microanalysis, and Raman spectroscopy. The mechanical properties were measured by nanoindentation, and the tribological properties were measured by pin-on-disk tests in ambient air. The wear tracks and ball scars were analyzed by Raman spectroscopy to elucidate the tribochemical reactions that occurred at the contact area and to determine the wear mechanism for each specimen type. The thermal stability of the coatings was studied up to 1000 °C using Raman spectroscopy and XRD. The samples prepared by DC-MS were very dense, and the phase composition changed from purely nanocrystalline (Nb2C and NbC) to a mixture of NbC crystals embedded in an amorphous carbon-based matrix (NbC/a-C(:H)). However, the samples prepared by HiPIMS developed a marked columnar morphology with a NbC/a-C(:H) nanocomposite structure. The hardness values ranged from 11 to 20 GPa depending on the deposition technique and the amount of the soft a-C(:H) phase present in the sample. The tribological properties of all the coatings were remarkably good when the carbon content was approximately 50 at.%. The formation of a lubricating sp2-rich C tribofilm between the ball and coating during the pin-on-disk tests was observed by Raman spectroscopy. The tribofilm formed preferentially on the samples prepared by HiPIMS, which had higher C contents. At 750 °C, the degradation of the NbC phases resulted in the formation of an additional a-C phase and niobium oxides
publishDate 2021
dc.date.none.fl_str_mv 2021
2021
2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/251392
url http://hdl.handle.net/10261/251392
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.1016/j.surfcoat.2021.127569
Sí
dc.rights.none.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:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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