Effect of spraying parameters on the microstructure of a nickel aluminide coating applied by Atmospheric Plasma Spray on a nickel-base alloy substrate

dc.contributor.advisorToro, Alejandro
dc.contributor.authorPuche Ojeda, Carlos Daniel
dc.contributor.orcidPuche Ojeda, Carlos [0009000748748949}
dc.contributor.orcidToro, Alejandro [0000000255895820]
dc.contributor.researchgroupGrupo de Tribología y Superficies
dc.date.accessioned2026-01-21T18:22:29Z
dc.date.available2026-01-21T18:22:29Z
dc.date.issued2025-12-01
dc.descriptionIlustraciones
dc.description.abstractEl presente trabajo evaluó la fabricación de recubrimientos Ni5wt%Al por proyección térmica mediante un diseño de experimentos en el cual se varió la composición de gases y la distancia de aspersión. Se midio el espesor, la rugosidad, la porosidad y las fases presentes. Para garantizar la repetibilidad del experimento se realizaron tres réplicas para las condiciones formuladas. Los recubrimientos fueron depositados mediante la técnica APS haciendo uso de una pistola SimplexPro sobre muestras de Inconel 625. El análisis de la microestructura de los recubrimientos fue llevado a cabo mediante técnicas de microscopía y Difracción de Rayos X, con las cuales se observó la aparición óxidos en los recubrimientos. La cantidad de defectos de la sección transversal de los recubrimientos fue evaluada mediante un tratamiento digital de imágenes. Se observó que la mejor condición presentó un porcentaje de porosidad de 2,2 ± 0,4% y fracción de óxidos de 5,2 ± 0,9%. Los resultados obtenidos mostraron diferencias en las respuestas de espesor, porosidad y rugosidad, se evaluó la resistencia adhesivo-cohesiva mediante la norma ASTMC-633, obteniéndose un valor de 62,82 ± 5 MPa. Además, se evaluó la resistencia a la fatiga térmica observándose un aumento de la oxidación el recubrimiento. Finalmente se evaluó la microdureza de la condición seleccionada mediante la norma ASTME-384 y se obtuvo un valor de 221 ± 18 Hv0.05 antes de los ensayos de fatiga térmica y posteriormente se observó un aumento a 271 Hv0.05 debido a la oxidación. (Texto tomado de la fuente)spa
dc.description.abstractThe present study evaluated the fabrication of Ni5wt%Al coatings using a design of experiments changing the gas composition and spraying distance. The resulting coatings were assessed in terms of thickness, roughness, porosity, and phase composition to obtain relevant information. To ensure experimental repeatability, three replicates were performed for each formulated condition. The coatings were deposited using the Atmospheric Plasma Spray technique with a SimplexPro torch on Inconel 625 substrates. The microstructural analysis of the coatings was carried out using microscopy techniques and X-ray diffraction (XRD), which revealed the formation of oxides within the coatings. The amount of defects in the cross-sections was quantified through digital image processing. The optimal condition exhibited a porosity level of 2.2 ± 0.4% and oxide content of 5.2 ± 0.9%. Given the differences observed in thickness, porosity, and roughness among the experimental conditions, the adhesive-cohesive strength of the best-performing coating was evaluated according to ASTM C633. The coating showed an adhesive-cohesive strength of 62.82 ± 5 MPa. In addition, thermal fatigue resistance was evaluated, revealing an increase in coating oxidation. Finally, the microhardness of the selected condition was evaluated according to ASTM E384, yielding a value of 221 ± 18 Hv0.05 before thermal fatigue testing. After testing, the microhardness increased to 271 Hv0.05 due to oxidation.eng
dc.description.curricularareaMateriales Y Nanotecnología.Sede Medellín
dc.description.degreelevelMaestría
dc.description.degreenameMagíster en Ingeniería - Materiales y Procesos
dc.description.researchareaTribologia y Superficies
dc.format.extent1 recurso en línea (196 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/89283
dc.language.isoeng
dc.publisherUniversidad Nacional de Colombia
dc.publisher.branchUniversidad Nacional de Colombia - Sede Medellín
dc.publisher.facultyFacultad de Minas
dc.publisher.placeMedellín, Colombia
dc.publisher.programMedellín - Minas - Maestría en Ingeniería - Materiales y Procesos
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dc.rights.accessrightsinfo:eu-repo/semantics/openAccess
dc.rights.licenseReconocimiento 4.0 Internacional
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subject.ddc670 - Manufactura
dc.subject.ddc620 - Ingeniería y operaciones afines::622 - Minería y operaciones relacionadas
dc.subject.lembFatiga de materiales
dc.subject.lembProcesamiento digital de imagenes
dc.subject.lembOxidación
dc.subject.proposalAspersión térmicaspa
dc.subject.proposalRecubrimientos Ni5Wt%Al,spa
dc.subject.proposalTratamiento digital de imágenesspa
dc.subject.proposalFatiga térmicaspa
dc.subject.proposalMicroestructuraspa
dc.subject.proposalResistencia adhesivo-cohesivaspa
dc.subject.proposalThermal sprayingeng
dc.subject.proposalNi5wt%Al coatingseng
dc.subject.proposalDigital image processingeng
dc.subject.proposalThermal fatigueeng
dc.subject.proposalMicrostructureeng
dc.subject.proposalAdhesive-cohesive strengtheng
dc.titleEffect of spraying parameters on the microstructure of a nickel aluminide coating applied by Atmospheric Plasma Spray on a nickel-base alloy substrateeng
dc.title.translatedEfecto de los parámetros de proyección sobre la microestructura de un recubrimiento de aluminuro de níquel aplicado mediante APS (Atmospheric Plasma Spray) sobre sustrato de aleación de base níquelspa
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
oaire.accessrightshttp://purl.org/coar/access_right/c_abf2

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