{"id":21489,"date":"2003-03-02T00:00:00","date_gmt":"2003-03-02T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/diseno-de-aceros-inoxidables-austena%c2%adticos-resistentes-a-la-oxidacion-a-alta-temperatura-efectos-de-la-composicion-de-la-matriz-y-de-las-modificaciones-superficiales\/"},"modified":"2003-03-02T00:00:00","modified_gmt":"2003-03-02T00:00:00","slug":"diseno-de-aceros-inoxidables-austena%c2%adticos-resistentes-a-la-oxidacion-a-alta-temperatura-efectos-de-la-composicion-de-la-matriz-y-de-las-modificaciones-superficiales","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/sevilla\/diseno-de-aceros-inoxidables-austena%c2%adticos-resistentes-a-la-oxidacion-a-alta-temperatura-efectos-de-la-composicion-de-la-matriz-y-de-las-modificaciones-superficiales\/","title":{"rendered":"Dise\u00f1o de aceros inoxidables austen\u00edticos resistentes a la oxidaci\u00f3n a alta temperatura. efectos de la composici\u00f3n de la matriz y de las modificaciones superficiales"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Said El Mrabet <\/strong><\/h2>\n<p>En la presente memoria se ha dise\u00f1ado un acero inoxidable denominado alto silicio en el que, fundamentalmente, se eleva la concentraci\u00f3n de este elemento a la vez que se elimina manganeso, teniendo en cuenta en el dise\u00f1o metal\u00fargico que se debe mantener el car\u00e1cter austen\u00edtico de la aleaci\u00f3n. en el trabajo se ha estudiado el comportamiento refractario de la aleaci\u00f3n del acero inoxidable alto silicio a altas temperaturas (900\u00c2\u00bac &#8211; 950\u00c2\u00bac &#8211; 1000\u00c2\u00bac), a distintos tiempos de permanencia mediante ensayos termogravim\u00e9tricos a fin de poder evaluar la influencia del silico sobre la velocidad de oxidaci\u00f3n. se ha realizado la caracterizaci\u00f3n y an\u00e1lisis de la capa de \u00f3xidos mediante varias t\u00e9cnicas: sem, drx, rbs, pixe, lo que permite aportar informaci\u00f3n sobre el crecimiento de la capa de \u00f3xidos, morfolog\u00eda de la cascarilla, determinaci\u00f3n del espesor.  tambi\u00e9n se ha estudiado el efecto de modificaciones superficiales mediante la deposici\u00f3n de el elemento reactivo lantano mediante pir\u00f3lisis de aerosoles y de igual forma se presentan los resultados de ensayos de oxidaci\u00f3n a alta temperatura del aisi-304 alto silicio recubierto con el lantano.  la nueva aleaci\u00f3n dise\u00f1ada presenta una oxidaci\u00f3n mas controlada, las modificaciones realizadas en los niveles de manganeso y silicio (incremento del contenido en silicio y descenso en el nivel de manganeso) tienen un efecto positivo sobre el comportamiento del material, la formaci\u00f3n de una capa de s\u00edlice en la interfase metal\/\u00f3xido muestra un buen comportamiento como barrera efectiva impermeable a la difusi\u00f3n. El recubrimiento con lantano de la aleaci\u00f3n del inoxidable austen\u00edtico alto silicio permite mantener un crecimiento lento de la cascarilla con mejor adhesi\u00f3n al metal y extiende el rango de comportamiento refractario de dicha aleaci\u00f3n desde 750\u00c2\u00bac hasta 1000\u00c2\u00bac<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Dise\u00f1o de aceros inoxidables austen\u00edticos resistentes a la oxidaci\u00f3n a alta temperatura. efectos de la composici\u00f3n de la matriz y de las modificaciones superficiales<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Dise\u00f1o de aceros inoxidables austen\u00edticos resistentes a la oxidaci\u00f3n a alta temperatura. efectos de la composici\u00f3n de la matriz y de las modificaciones superficiales <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Said El Mrabet <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Sevilla<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 03\/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>Jos\u00e9 Antonio Odriozola Gordon<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: ignacio Carrizosa esquivel <\/li>\n<li> Baena liberato Jos\u00e9 Mar\u00eda (vocal)<\/li>\n<li> Centeno gallego Miguel \u00e1ngel (vocal)<\/li>\n<li> Costa alves eduardo Jorge  da (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Said El Mrabet En la presente memoria se ha dise\u00f1ado un acero inoxidable denominado alto silicio en [&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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