Untitled - Materials Science Institute of Madrid - Consejo Superior de ...
Untitled - Materials Science Institute of Madrid - Consejo Superior de ...
Untitled - Materials Science Institute of Madrid - Consejo Superior de ...
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20. Estudio <strong>de</strong> las propieda<strong>de</strong>s mecánicas<br />
<strong>de</strong> capas <strong>de</strong>lgadas mediante técnicas <strong>de</strong><br />
nanoin<strong>de</strong>ntación<br />
La nanoin<strong>de</strong>ntación es una técnica relativamente novedosa<br />
que amplía notablemente las posibilida<strong>de</strong>s <strong>de</strong> los<br />
ensayos <strong>de</strong> dureza tradicionales. Desarrollada en las<br />
dos últimas décadas, la técnica emplea instrumentación<br />
electrónica <strong>de</strong> muy alta precisión para ejercer un control<br />
continuo <strong>de</strong> la carga aplicada al in<strong>de</strong>ntador (en<br />
rango <strong>de</strong> mili-newtons) y, al mismo tiempo, registrar<br />
también <strong>de</strong> manera continua el <strong>de</strong>splazamiento <strong>de</strong>l<br />
mismo <strong>de</strong>ntro <strong>de</strong> la muestra analizada. Debido a la<br />
riqueza <strong>de</strong> información que, sobre la muestra, contienen<br />
los datos <strong>de</strong> carga vs. <strong>de</strong>splazamiento ha sido posible<br />
implementar un amplio número <strong>de</strong> métodos y técnicas<br />
para caracterizar gran número <strong>de</strong> propieda<strong>de</strong>s<br />
mecánicas. Entre otras: dureza, módulo elástico, resistencia<br />
a la fractura (fracture toughness), límite elástico<br />
(yield stress), endurecimiento por <strong>de</strong>formación (strainhar<strong>de</strong>ning),<br />
fluencia (creep), etc. La técnica, puesta a<br />
punto recientemente en el laboratorio, ha sido utilizado<br />
en el estudio <strong>de</strong> un amplio rango <strong>de</strong> materiales, fundamentalmente<br />
en forma <strong>de</strong> capa <strong>de</strong>lgada (DLC, nitruros<br />
metálicos, polímeros, etc)<br />
20. Study <strong>of</strong> the mechanical properties <strong>of</strong><br />
thin film by nanoin<strong>de</strong>ntation techniques<br />
Nanoin<strong>de</strong>ntation is a relatively new technique which<br />
wi<strong>de</strong>ns the possibilities <strong>of</strong> traditional hardness tests.<br />
Developed in the last <strong>de</strong>ca<strong>de</strong>s, the technique uses high<br />
precision electronic instrumentation to control the<br />
small loads (in the mili-Newton range) applied to the<br />
in<strong>de</strong>nter and, at the same time, to record continuously<br />
the displacement (<strong>de</strong>pth) on the analysed sample. Due<br />
to the wealth <strong>of</strong> information provi<strong>de</strong>d by the load vs<br />
displacement curves, it is possible to implement a wi<strong>de</strong><br />
number <strong>of</strong> methods and techniques to characterize a<br />
wi<strong>de</strong> range <strong>of</strong> mechanical properties, such as har<strong>de</strong>ness,<br />
elastic modulus, fracture toughness, yield stress,<br />
strain har<strong>de</strong>ning, creep, etc. The technique, recently<br />
mounted and set-up in the laboratory, has been used in<br />
the study <strong>of</strong> a wi<strong>de</strong> range <strong>of</strong> materials, mostly as thin<br />
films (DLC, metallic nitri<strong>de</strong>s, polymers, etc)<br />
1. Caretti I.; Jiménez I.; Gago R.; Cáceres D., Abendroth B.; . Albella J. M: Tribological Properties <strong>of</strong> Ternary BCN Films with Controlled<br />
Composition and Bonding Structure”. Diamond and Related <strong>Materials</strong>, 13 (2004) 1532-1537.<br />
Proyectos: Proyecto V PM <strong>de</strong> la CE, ref. no.: 65RD-CT-2000-00333.<br />
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