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Descripción
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| The research group for Materials for extreme in-service conditions is part of the Materials Science Department of the Technical University of Madrid (UPM) in Spain. The research of our group is the mechanical characterization of materials for energy applications, from high temperature ceramics to superconductivity and cryogenics. The main focus is on sustainable energy, with special attention on tungsten compounds. The group has an excellent track record in international pioneering projects on sustainable energy (such as ITER on nuclear fusion), but also in collaboration with other groups for the characterization of, for example, silicon for solar cells. Focusing on ITER project and owing to its low sputtering yield and good thermo-mechanical properties, tungsten seems a promising candidate material for plasma-facing components in next fusion experimental devices. However, the major drawback of sintered tungsten materials is their high DBTT (high ductile-to-brittle transition temperature) as well as the difficulty in machining and welding [1]. For this reason, alternative tungsten based materials grades are being developed. Among the preferred routes, W coatings have main advantages of the possibility to produce and repair multiple shapes components, even in not flat ones; but the main issue is that there are not yet enough data on the behavior of different W grade at fusion operating conditions. In the present work, one of the focuses is on the mechanical characterization of nanostructured W coatings produced by magnetron sputtering technology by the Fusion Institute of the UPM. Their microstructure and composition were characterized by field emission microstructure and X-ray diffraction, while nanoindentation experiments have been performed on the coated samples in order to prove the suitability and load limit of such coated materials. By means of this characterization it was possible to determine the fracture properties of those nanostructured materials, as compared to bulk commercial tungsten. [1] Y. Niu et al. / Fusion Engineering and Design 85 (2010) 1521?1526 | |
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Internacional
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Si |
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Nombre congreso
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Nanomeasure 2015 |
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Tipo de participación
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960 |
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Lugar del congreso
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Barcelona, España |
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Revisores
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Si |
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ISBN o ISSN
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0000-0000 |
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DOI
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Fecha inicio congreso
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15/04/2015 |
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Fecha fin congreso
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16/04/2015 |
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1 |
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Hasta la página
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1 |
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Título de las actas
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Nanomeasure 2015 Programme |