Estudio de la influencia de relación sílice/alúmina sobre algunas propiedades mecánicas de la cerámica tradicional

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dc.contributor.advisorRestrepo Baena, Oscar Jaime
dc.contributor.advisorTobón, Jorge Iván
dc.contributor.authorÁlvarez Díaz, Daniela
dc.contributor.researchgroupGrupo del Cemento y Materiales de Construcciónspa
dc.date.accessioned2024-11-20T17:43:23Z
dc.date.available2024-11-20T17:43:23Z
dc.date.issued2024
dc.descriptionIlustraciones, fotografíasspa
dc.description.abstractLa mecánica de fractura en los cerámicos es un campo ampliamente estudiado debido a su inherente fragilidad. Los cerámicos, caracterizados por su alta dureza, resistencia al desgaste y estabilidad térmica, presentan desafíos significativos en términos de su comportamiento bajo tensión, debido a su tendencia a fracturarse de manera catastrófica. Factores como la microestructura, el tamaño y distribución de los granos, la presencia de defectos como la porosidad y las condiciones de carga influyen en la resistencia a la fractura de estos materiales. En este trabajo se evaluaron propiedades tremo mecánicas como la resistencia al choque térmico y la tenacidad a la fractura, en función de la relación sílice/alúmina, determinada a partir del cambio en la dosificación de materias primas en la formulación de la pasta. Se emplearon técnicas de caracterización química y mineralógica (FRX y DRX) y ensayos de nanoindentación para medir la tenacidad a la fractura, así como ciclos de calentamiento y enfriamiento para evaluar la resistencia al choque térmico. La pasta con mejor respuesta en ambas propiedades presentó una relación estequiométrica sílice/alúmina de 3.01, evidenciando mecanismos de aumento de la tenacidad debido a la formación de microgrietas alrededor de los límites de grano en la matriz que pueden ser causadas por la introducción de segundas fases con diferentes coeficientes de expansión térmica, que dificultan la propagación de las macrogrietas al aumentar su recorrido. (Tomado de la fuente)spa
dc.description.abstractFracture mechanics in ceramics is a widely studied field due to its inherent brittleness. Ceramics, characterized by their high hardness, wear resistance, and thermal stability, present significant challenges in terms of their behavior under stress due to their tendency to fracture catastrophically. Factors such as microstructure, grain size and distribution, the presence of defects as porosities, and loading conditions influences the fracture resistance of these materials. In this work, thermomechanical properties such as thermal shock resistance and fracture toughness were evaluated based on the silica/alumina ratio, determined by adjusting the raw material composition in the paste formulation. Chemical and mineralogical characterization techniques (XRF and XRD) were used, through with nanoindentation tests to measure fracture toughness, and thermal cycling to assess thermal shock resistance. The paste with the best response in both properties had a stoichiometric ratio of 3.01, evidencing mechanisms of toughness enhancement due to the formation of microcracks around the grain boundaries in the matrix, which can be caused by the introduction of second phases with different thermal expansion coefficients, hindering the propagation of macrocracks by increasing their path length.eng
dc.description.curricularareaMateriales Y Nanotecnología.Sede Medellínspa
dc.description.degreelevelMaestríaspa
dc.description.degreenameMagíster en Ingeniería - Materiales y Procesosspa
dc.format.extent93 páginasspa
dc.format.mimetypeapplication/pdfspa
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/87193
dc.language.isospaspa
dc.publisherUniversidad Nacional de Colombiaspa
dc.publisher.branchUniversidad Nacional de Colombia - Sede Medellínspa
dc.publisher.facultyFacultad de Minasspa
dc.publisher.placeMedellín, Colombiaspa
dc.publisher.programMedellín - Minas - Maestría en Ingeniería - Materiales y Procesosspa
dc.relation.indexedLaReferenciaspa
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dc.rights.accessrightsinfo:eu-repo/semantics/openAccessspa
dc.rights.licenseReconocimiento 4.0 Internacionalspa
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/spa
dc.subject.ddc620 - Ingeniería y operaciones afinesspa
dc.subject.ddc620 - Ingeniería y operaciones afines::622 - Minería y operaciones relacionadasspa
dc.subject.lembCerámica - Propiedades mecánicas
dc.subject.lembResistencia de materiales
dc.subject.lembFractura de cerámicas
dc.subject.lembEsfuerzos y deformaciones
dc.subject.proposalCerámicosspa
dc.subject.proposalPropiedades mecánicasspa
dc.subject.proposalTenacidad a la fracturaspa
dc.subject.proposalMateriales cerámicosspa
dc.subject.proposalFractura frágilspa
dc.subject.proposalPorosidadspa
dc.subject.proposalChoque térmicospa
dc.subject.proposalCeramic materialseng
dc.subject.proposalBrittle fractureeng
dc.subject.proposalThermal shockeng
dc.titleEstudio de la influencia de relación sílice/alúmina sobre algunas propiedades mecánicas de la cerámica tradicionalspa
dc.title.translatedStudy of the influence of the silica/alumina ratio on some mechanical properties of traditional ceramicseng
dc.typeTrabajo de grado - Maestríaspa
dc.type.coarhttp://purl.org/coar/resource_type/c_bdccspa
dc.type.coarversionhttp://purl.org/coar/version/c_ab4af688f83e57aaspa
dc.type.contentTextspa
dc.type.driverinfo:eu-repo/semantics/masterThesisspa
dc.type.redcolhttp://purl.org/redcol/resource_type/TMspa
dc.type.versioninfo:eu-repo/semantics/acceptedVersionspa
dcterms.audience.professionaldevelopmentEstudiantesspa
dcterms.audience.professionaldevelopmentInvestigadoresspa
dcterms.audience.professionaldevelopmentMaestrosspa
oaire.accessrightshttp://purl.org/coar/access_right/c_abf2spa

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