{"id":64617,"date":"2018-03-09T22:52:40","date_gmt":"2018-03-09T22:52:40","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/sa%c2%adntesis-y-procesamiento-coloidal-del-nanocomposites-de-alumina-mullita\/"},"modified":"2018-03-09T22:52:40","modified_gmt":"2018-03-09T22:52:40","slug":"sa%c2%adntesis-y-procesamiento-coloidal-del-nanocomposites-de-alumina-mullita","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/materiales-ceramicos\/sa%c2%adntesis-y-procesamiento-coloidal-del-nanocomposites-de-alumina-mullita\/","title":{"rendered":"S\u00edntesis y procesamiento coloidal del nanocomposites de al\u00famina-mullita"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Olga Burgos Montes <\/strong><\/h2>\n<p>Los materiales de al\u00faminas constituyen uno de los grupos de materiales cer\u00e1micos m\u00e1s importantes y m\u00e1s ampliamente utilizados en aplicaciones estructurales, debido a sus excelentes propiedades mec\u00e1nicas. Sin embargo, a altas temperaturas la calidad de su comportamiento mec\u00e1nico disminuye, mostrando baja resistencia al choque. Una de las posibles alternativas a este problema consiste en la adici\u00f3n de una segunda fase cristalina compatible qu\u00edmicamente con la al\u00famina y que mejore las propiedades de \u00e9sta. La incorporaci\u00f3n de la segunda fase de mullita, con excelentes propiedades mec\u00e1nicas a alta temperatura, permite solventar este inconveniente sin afectar a las propiedades a temperatura ambiente, siempre y cuando esta adici\u00f3n suponga una presencia minoritaria con respecto a la matr\u00edz de al\u00famina. la labor desarrollada en esta memoria se ha centrado en la preparaci\u00f3n de materiales al\u00famina-mullita con un 10% en vol\u00famen de la segunda fase. El comportamiento y las propiedades del material final dependen de la microestructura del mismo que a su vez est\u00e1 influenciada por el proceso de preparaci\u00f3n y los materiales de partida empleados. Por todo ello, en este trabajo se han planteado diferentes rutas manteniendo siempre la misma matr\u00edz de al\u00famina y variando el tipo de mullita utilizada. Principalmente se han dise\u00f1ado dos estrategias diferenciadas, la primera de ellas consiste en la introducci\u00f3n de la fase mullita como tal para el conformado posterior de los materiales, mientras que la segunda estrategia implica la formaci\u00f3n in situ de la mullita durante la sinterizaci\u00f3n, partiendo de materiales al\u00famina-s\u00edlice. Dentro del primer grupo se han planteado dos ruta principales: por un lado la utilizaci\u00f3n de polvos comerciales de mullita, cuya principal diferencia es el tama\u00f1o de part\u00edcula primaria, y polvos de mullita obtenidos por diferentes m\u00e9todos de s\u00edntesis como son la combusti\u00f3n y la reacci\u00f3n de al\u00famina y s\u00edlice en suspensi\u00f3n. El efecto del tipo de mullita en los materiales al\u00famina-mullita se ha evaluado en t\u00e9rminos microestructurales junto con su respuesta mec\u00e1nica.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>S\u00edntesis y procesamiento coloidal del nanocomposites de al\u00famina-mullita<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 S\u00edntesis y procesamiento coloidal del nanocomposites de al\u00famina-mullita <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Olga Burgos Montes <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 21\/05\/2008<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Rodrigo Moreno Botella<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: vicente Fernandez herrero <\/li>\n<li>mario Juan Mora alfonso (vocal)<\/li>\n<li>Marta Palacios ar\u00e9valo (vocal)<\/li>\n<li>Mar\u00eda Elena Villafuente castrej\u00f3n (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Olga Burgos Montes Los materiales de al\u00faminas constituyen uno de los grupos de materiales cer\u00e1micos m\u00e1s importantes [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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