{"id":78376,"date":"2018-03-09T23:24:02","date_gmt":"2018-03-09T23:24:02","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/caracterizacion-termica-y-estructural-de-multicapas-de-cu-mg-crecidas-mediante-ebd\/"},"modified":"2018-03-09T23:24:02","modified_gmt":"2018-03-09T23:24:02","slug":"caracterizacion-termica-y-estructural-de-multicapas-de-cu-mg-crecidas-mediante-ebd","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/caracterizacion-termica-y-estructural-de-multicapas-de-cu-mg-crecidas-mediante-ebd\/","title":{"rendered":"Caracterizaci\u00f3n t\u00e9rmica y estructural de multicapas de cu\/mg crecidas mediante ebd"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Marta Gonzalez Silveira <\/strong><\/h2>\n<p>Los sistemas de multicapas son de alto inter\u00e9s cient\u00edfico en el campo de la ciencia de materiales debido al elevado n\u00famero de aplicaciones posibles que estos sistemas presentan, entre ellos aplicaciones en microelectr\u00f3nica, recubrimientos resistivos o dispositivos optoelectr\u00f3nicos. Dependiendo de la aplicaci\u00f3n, la caracterizaci\u00f3n t\u00e9rmica de las capas es fundamental. en este trabajo se han caracterizado las diferentes reacciones que tienen lugar en el sistema de multicapas cu\/mg al someter al mismo a diferentes tratamientos t\u00e9rmicos. Mediante diferentes t\u00e9cnicas de caracterizaci\u00f3n se ha obtenido que independientemente de la estequimetr\u00eda que presentaran las capas, la primera fase en formarse ha sido el intermet\u00e1lico cumg2, mientras que el intermet\u00e1lico cu2mg se ha formado cuando las capas han presentado un excedente de cu respecto a la estequiometr\u00eda 1cu:2mg. Durante tratamientos t\u00e9rmicos en los que la muestra es calentada a velocidad constante, la formaci\u00f3n del intermet\u00e1lico cumg2 tiene lugar en dos etapas bien diferenciadas: en primer lugar  la nucleaci\u00f3n y crecimiento lateral de esta fase a lo largo de las intercaras, y, al aumentar la temperatura, el crecimiento vertical del intermet\u00e1lico a expensas de las capas de cu y mg puros. Adem\u00e1s de esta separaci\u00f3n entre ambos modos de crecimiento, se ha observado una clara dependencia de la primera etapa de transformaci\u00f3n con el grosor de las capas. Cuando las capas de mg superan cierto espesor, esta etapa de transformaci\u00f3n no se produce de forma simult\u00e1nea en ambos tipos de intercara. concretamente, la reacci\u00f3n se produce en primer lugar en las intercaras de tipo mg sobre cu mientras que en las intercaras de tipo cu sobre mg el intermet\u00e1lico aparece a mayor temperatura. Esta asimetr\u00eda puede estar relacionada con la microestructura de las capas de mg.  por otra parte, las muestras han sido sometidas a tratamientos de hidrogenaci\u00f3n, despu\u00e9s de los cuales se ha obser<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Caracterizaci\u00f3n t\u00e9rmica y estructural de multicapas de cu\/mg crecidas mediante ebd<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Caracterizaci\u00f3n t\u00e9rmica y estructural de multicapas de cu\/mg crecidas mediante ebd <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Marta Gonzalez Silveira <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma de barcelona<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 23\/01\/2006<\/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>Javier Rodriguez Viejo<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Mar\u00eda  teresa Mora aznar <\/li>\n<li>paloma Adeva ramos (vocal)<\/li>\n<li>claire Bergman (vocal)<\/li>\n<li>albert Figueras (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Marta Gonzalez Silveira Los sistemas de multicapas son de alto inter\u00e9s cient\u00edfico en el campo de la [&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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