Influencia de los depósitos de óxido de hierro sobre la resistencia a la corrosión en caliente de barreras térmicas de YSZ usadas en turbinas a gas.

dc.contributorToro-Betancur, Alejandro Octavio
dc.creatorGómez Betancur, José Andrés
dc.date.accessioned2021-08-23T16:05:16Z
dc.date.accessioned2022-09-21T15:41:03Z
dc.date.available2021-08-23T16:05:16Z
dc.date.available2022-09-21T15:41:03Z
dc.date.created2021-08-23T16:05:16Z
dc.date.issued2021-08-08
dc.identifierhttps://repositorio.unal.edu.co/handle/unal/79994
dc.identifierUniversidad Nacional de Colombia
dc.identifierRepositorio Institucional Universidad Nacional de Colombia
dc.identifierhttps://repositorio.unal.edu.co/
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/3383768
dc.description.abstractLa presente investigación evaluó el efecto de los depósitos de óxido de hierro sobre la resistencia de la corrosión en caliente de las barreras térmicas de Zirconia estabilizada con Itria (YSZ) en presencia de óxido de vanadio. En los experimentos las muestras de YSZ fueron puestas en contacto con óxido de vanadio (V2O5) a 900°C durante 90 min con y sin la adición de óxido de hierro. Las superficies ensayadas y la sección transversal de las muestras fueron evaluadas mediante microscopía óptica y electrónica de barrido. La porosidad de la sección transversal y la delaminación de la barrera térmica fue medida a través de tratamiento digital de imágenes. El análisis microestructural se llevó a cabo mediante difracción de rayos X (DRX). El microanálisis químico elemental fue llevado a cabo mediante espectroscopía de energía dispersiva por rayos X (EDX). Se encontró que el óxido de hierro no tuvo un efecto inhibidor ni acelerador sobre el mecanismo de corrosión en caliente de la YSZ dado que es disuelto por el óxido de vanadio una vez este alcanza su punto de fusión. (Tomado de la fuente)
dc.description.abstractThe present investigation evaluated the effect of iron oxide deposits on the hot corrosion resistance of YSZ thermal barriers in the presence of vanadium oxide. In the experiments, the YSZ samples were put in contact with vanadium oxide (V2O5) at 900 ° C for 90 min with and without the addition of iron oxide. The tested surfaces and the cross section of the samples were evaluated by optical and scanning electron microscopy. The porosity of the cross-section and the delamination of the thermal barrier was measured through digital image processing. Microstructural analysis was carried out by XRD. The elemental chemical microanalysis was carried out by means of X-ray energy dispersive spectroscopy (EDS). It was found that iron oxide did not have an inhibiting or accelerating effect on the hot corrosion mechanism of the YSZ since it is dissolved by vanadium oxide once it reaches its melting point. (Tomado de la fuente)
dc.languagespa
dc.publisherUniversidad Nacional de Colombia
dc.publisherMedellín - Minas - Maestría en Ingeniería - Materiales y Procesos
dc.publisherDepartamento de Materiales y Minerales
dc.publisherFacultad de Minas
dc.publisherMedellín
dc.publisherUniversidad Nacional de Colombia - Sede Medellín
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dc.rightshttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rightsinfo:eu-repo/semantics/openAccess
dc.titleInfluencia de los depósitos de óxido de hierro sobre la resistencia a la corrosión en caliente de barreras térmicas de YSZ usadas en turbinas a gas.
dc.typeTesis


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