{"id":131291,"date":"1996-01-01T00:00:00","date_gmt":"1996-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/procesamiento-de-nitruro-de-silicio-por-tecnicas-de-filtracion-coloidal\/"},"modified":"1996-01-01T00:00:00","modified_gmt":"1996-01-01T00:00:00","slug":"procesamiento-de-nitruro-de-silicio-por-tecnicas-de-filtracion-coloidal","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-tecnologicas\/procesamiento-de-nitruro-de-silicio-por-tecnicas-de-filtracion-coloidal\/","title":{"rendered":"Procesamiento de nitruro de silicio por tecnicas de filtracion coloidal."},"content":{"rendered":"<h2>Tesis doctoral de <strong>  Homem De Mello Castanho Sonia Regina <\/strong><\/h2>\n<p>En el presente trabajo se estudian los parametros de procesamieto involucrados en la obtencion de materiales de si3n4. Se procesa un polvo comercial de alafa si3n4 distintas rutas de conformado, tales como colaje en escayola y colaje bajo presion. En todos los casos se sistematizan las distintas etapas del proceso. Se determinan las propiedades electroforeticas y reologicas de suspensiones de si3n4 en agua, considerando el efecto que ejercen sobre ellas los aditivos introducidos para favorecer la sinterizacion (al203 e y203). Se estudia la influencia del tipo y concentracion de defloculantem el efecto del contenido en solidos, la influencia de la etapa de homogeneizacion a traves de distintas tecnicas de mezclado, etc. Una vez optimizadas las condiciones de preparacion se hace un estudio del proceso de conformado, analizando la cinetica de formacion de pared en las tecnicas de filtracion con y sin presion en funcion de distintas variables (mezclado, presion aplicada, etc).  utilizando tecnicas de caracterizacion de superficies (xps,tem,eds), se ha podido evaluar la contribucion de cada etapa del proceso en la oxidacion superficial de las piezas en verde obtenidas por las distintas rutas de conformado. Asimismo, se comparan los valores de densidad en verde alcanzados y se verifican las condiciones de sinterizacion cara a la obtencion de materiales densos de si3n4. Finalmente, se analiza la evolucion microestructural y el comportamiento mecanico de cada tecnica de conformado considerada.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Procesamiento de nitruro de silicio por tecnicas de filtracion coloidal.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Procesamiento de nitruro de silicio por tecnicas de filtracion coloidal. <\/li>\n<li><strong>Autor:<\/strong>\u00a0  Homem De Mello Castanho Sonia Regina <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1996<\/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>Jos\u00e9 Luis Garc\u00eda Fierro (vocal)<\/li>\n<li>Antonio  Ricardo Guerrero Ruiz (vocal)<\/li>\n<li>  (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Homem De Mello Castanho Sonia Regina En el presente trabajo se estudian los parametros de procesamieto involucrados [&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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