{"id":21742,"date":"2018-03-09T09:11:39","date_gmt":"2018-03-09T09:11:39","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/recubrimientos-protectores-obtenidos-por-deposicion-electroforetica-a-partir-de-suspensiones-sol-gel\/"},"modified":"2018-03-09T09:11:39","modified_gmt":"2018-03-09T09:11:39","slug":"recubrimientos-protectores-obtenidos-por-deposicion-electroforetica-a-partir-de-suspensiones-sol-gel","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/recubrimientos-protectores-obtenidos-por-deposicion-electroforetica-a-partir-de-suspensiones-sol-gel\/","title":{"rendered":"Recubrimientos protectores obtenidos por deposici\u00f3n electrofor\u00e9tica a partir de suspensiones sol-gel"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Mar\u00eda   Yolanda Castro Mart\u00edn <\/strong><\/h2>\n<p>El uso de algunos metales se ve limitado por los procesos de corrosi\u00f3n que se desarrollan en medios agresivos. Existen diferentes v\u00edas para incrementar la resistencia a la corrosi\u00f3n. Una de las alternativas m\u00e1s comunes es la modificaci\u00f3n superficial del metal mediante el uso de recubrimientos protectores, que son capaces de crear una barrera f\u00edsica que impide el contacto del metal con el medio que le rodea.  el proceso sol-gel permite preparar recubrimientos v\u00edtreos sobre metales utilizando temperaturas de sinterizaci\u00f3n bajas (500\u00c2\u00bac), pero presenta una limitaci\u00f3n importante en cuanto al espesor m\u00e1ximo de las capas, situado alrededor de 2um. Para aumentar el espesor de un recubrimiento se pueden utilizar diferentes v\u00edas, desde la deposici\u00f3n de multicapas a la incorporaci\u00f3n de part\u00edculas al sol.  la t\u00e9cnica de deposici\u00f3n electrofor\u00e9tica (epd) es una de las v\u00edas de procesamiento coloidal que ofrece mejores perspectivas dentro del conformado cer\u00e1mico respecto a la fabricaci\u00f3n de recubrimientos gruesos.  esta t\u00e9cnica se basa en el fen\u00f3meno electrocin\u00e9tico de electroforesis, por el que las part\u00edculas en suspensi\u00f3n en un medio l\u00edquido migran hacia el electrodo de signo contrario al de su carga superficial, en presencia de un campo el\u00e9ctrico.  el objetivo de esta tesis ha sido la obtenci\u00f3n de capas gruesas para proteger metales, combinando las ventajas del m\u00e9todo sol-gel con las del proceso de deposici\u00f3n electrofor\u00e9tica. Para ello, se han utilizado suspensiones sol-gel que incorporan soluciones coloidales de sio2 y zro2 a soles h\u00edbridos de  sio2 catalizados en medio \u00e1cido, y tambi\u00e9n soles particulados de s\u00edlice y s\u00edlice-circona preparados por cat\u00e1lisis b\u00e1sica.  se han analizado los par\u00e1metros de la s\u00edntesis (ph, relaci\u00f3n h2o\/alc\u00f3xidos, humedad, atm\u00f3sfera, etc), y las caracter\u00edsticas reol\u00f3gicas de las suspensiones en funci\u00f3n de la temperatura, concentraci\u00f3n, atm\u00f3sfera, etc., Con objeto de alcan<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Recubrimientos protectores obtenidos por deposici\u00f3n electrofor\u00e9tica a partir de suspensiones sol-gel<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Recubrimientos protectores obtenidos por deposici\u00f3n electrofor\u00e9tica a partir de suspensiones sol-gel <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Mar\u00eda   Yolanda Castro Mart\u00edn <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 21\/02\/2003<\/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>Alicia Dur\u00e1n Carrera<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: vicente Fernandez herrero <\/li>\n<li>alejandro Ure\u00f1a fernandez (vocal)<\/li>\n<li>david Levy coh\u00e9n (vocal)<\/li>\n<li> Damborrenea gonz\u00e1lez Juan  Jos\u00e9 (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Mar\u00eda Yolanda Castro Mart\u00edn El uso de algunos metales se ve limitado por los procesos de corrosi\u00f3n [&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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