Deposición de películas protectoras de DLC utilizando la técnica PECVD, con intercapas de Ti, Si y mezcla de Ti y Si, sobre sustratos de acero de baja aleación AISI 4140

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dc.contributor.advisorCapote Rodríguez, Gil
dc.contributor.advisorGutiérrez Bernal, Jesús Manuel
dc.contributor.authorZacipa Pinilla, Toiber Fabián
dc.contributor.researchgroupCiencia de Materiales y Superficies (GCMS)
dc.date.accessioned2025-11-18T16:45:06Z
dc.date.available2025-11-18T16:45:06Z
dc.date.issued2025
dc.descriptionilustraciones a color, diagramas, fotografíasspa
dc.description.abstractEn este trabajo se estudió la influencia de intercapas de silicio (a-Si:H), titanio (a-Ti:H) y mezcla de ambos (a-SixTi:H) sobre la adherencia, las propiedades mec´anicas y tribológicas de recubrimientos de carbono tipo diamante (DLC), depositados mediante la técnica PECVD con fuente de corriente continua pulsada (DC-PECVD) sobre sustratos de acero de baja aleación AISI 4140. Las intercapas fueron obtenidas a partir de precursores líquidos tetrametilsilano (TMS) y tetraetilo de ortotitanato (TEOT), mientras que el recubrimiento de DLC se deposit´o utilizando hexano. La caracterización incluyó espectroscopía Raman, FTIR, XPS, AFM, SEM, perfilometría, nanoindentación, pruebas de fricción y desgaste, y evaluación de adherencia mediante el ensayo de indentación Rockwell C según la norma VDI 3198. Los resultados muestran que las intercapas de a-Si:H y a-SixTi:H promovieron una adherencia adecuada del recubrimiento DLC, mientras que las intercapas de a-Ti:H no lograron unión efectiva al sustrato. Se observó además que las propiedades mecánicas y tribológicas del DLC variaron según la naturaleza de la intercapa, destacando la contribución de los enlaces químicos en la interfase como factor determinante. Este estudio demuestra la influencia de los precursores líquidos para formar intercapas funcionales que mejoren el desempeño de recubrimientos DLC en aceros industriales (Texto tomado de la fuente).spa
dc.description.abstractIn this work, the influence of silicon (a-Si:H), titanium (a-Ti:H), and mixed (a-SixTi:H) interlayers on the adhesion, mechanical, and tribological properties of diamond-like carbon (DLC) coatings was studied. The coatings were deposited on low-alloy AISI 4140 steel substrates by the pulsed direct current plasma-enhanced chemical vapor deposition (DC-PECVD) technique. The interlayers were obtained from the liquid precursors tetramethylsilane (TMS) and tetraethyl orthotitanate (TEOT), while the DLC coating was deposited using hexane. The characterization included Raman spectroscopy, FTIR, XPS, AFM, SEM, profilometry, nanoindentation, friction and wear tests, and adhesion evaluation using the Rockwell C indentation test according to the VDI 3198 standard. The results showed that the a-Si:H and a-SixTi:H interlayers promoted adequate adhesion of the DLC coating, whereas the a-Ti:H interlayers did not achieve effective bonding to the substrate. It was also observed that the mechanical and tribological properties of the DLC varied depending on the nature of the interlayer, highlighting the role of interfacial chemical bonding as a determining factor. This study demonstrates the potential of liquid precursors to form functional interlayers that enhance the performance of DLC coatings on industrial steels.eng
dc.description.degreelevelMaestría
dc.description.degreenameMagister en Ingeniería Materiales y Procesos
dc.description.researchareaIngenieria de superficies
dc.format.extentxvi, 81 páginas
dc.format.mimetypeapplication/pdf
dc.identifier.instnameUniversidad Nacional de Colombiaspa
dc.identifier.reponameRepositorio Institucional Universidad Nacional de Colombiaspa
dc.identifier.repourlhttps://repositorio.unal.edu.co/spa
dc.identifier.urihttps://repositorio.unal.edu.co/handle/unal/89132
dc.language.isospa
dc.publisherUniversidad Nacional de Colombia
dc.publisher.branchUniversidad Nacional de Colombia - Sede Bogotá
dc.publisher.facultyFacultad de Ingeniería
dc.publisher.placeBogotá, Colombia
dc.publisher.programBogotá - Ingeniería - Maestría en Ingeniería - Materiales y Procesos
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dc.rights.accessrightsinfo:eu-repo/semantics/openAccess
dc.rights.licenseAtribución-NoComercial-SinDerivadas 4.0 Internacional
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject.ddc660 - Ingeniería química::667 - Tecnología de la limpieza, del color, del revestimiento y relacionadas
dc.subject.ddc660 - Ingeniería química::661 - Tecnología de químicos industriales
dc.subject.lembCUBIERTAS PROTECTORASspa
dc.subject.lembProtective converingseng
dc.subject.lembREVESTIMIENTOS PROTECTORESspa
dc.subject.lembProtective coatingseng
dc.subject.lembALEACIONES DE SILICIOspa
dc.subject.lembSilicon alloyseng
dc.subject.lembALEACIONES HIERRO-SILICIOspa
dc.subject.lembIron-silicon alloyseng
dc.subject.lembESPECTROSCOPIA DE RAMANspa
dc.subject.lembRaman Spectroscopyeng
dc.subject.lembANALISIS ESPECTRALspa
dc.subject.lembSpectrum analysiseng
dc.subject.proposalRecubrimientos DLCspa
dc.subject.proposalPECVD DC-pulsadospa
dc.subject.proposalIntercapasspa
dc.subject.proposalCaracterización Ramanspa
dc.subject.proposalXPSspa
dc.subject.proposalFTIRspa
dc.subject.proposalAdherencia VDI 3198spa
dc.subject.proposalTMSspa
dc.subject.proposalTEOTspa
dc.subject.proposalDLC coatingseng
dc.subject.proposalDC-pulsed PECVDeng
dc.subject.proposalInterlayerseng
dc.subject.proposalRaman characterization,eng
dc.subject.proposalVDI 3198 adhesioneng
dc.titleDeposición de películas protectoras de DLC utilizando la técnica PECVD, con intercapas de Ti, Si y mezcla de Ti y Si, sobre sustratos de acero de baja aleación AISI 4140spa
dc.title.translatedDeposition of protective DLC films using the PECVD technique, with Ti, Si, and Ti–Si mixed interlayers, on low-alloy AISI 4140 steel substrateseng
dc.typeTrabajo de grado - Maestría
dc.type.coarhttp://purl.org/coar/resource_type/c_bdcc
dc.type.coarversionhttp://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.contentText
dc.type.driverinfo:eu-repo/semantics/masterThesis
dc.type.redcolhttp://purl.org/redcol/resource_type/TM
dc.type.versioninfo:eu-repo/semantics/acceptedVersion
dcterms.audience.professionaldevelopmentEstudiantes
dcterms.audience.professionaldevelopmentInvestigadores
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