Title:
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Nano-mechanical properties of silver-welded YBCO bulks
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Author:
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Roa Rovira, Joan Josep; Bartolomé, E.; Bozzo, Bernat; Capdevila, X.G.; Granados García, Javier A.J.; Segarra, M.
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica |
Abstract:
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The mechanical properties of melt-textured YBCO bulk boundaries are a topic of
special interest especially in the manufacturing of superconductor devices for engineering
applications. Instrumented indentation technique is a powerful tool widely employed to
characterize the mechanical properties of small volumes. We presented results of the
nanohardness (H) and Young’s modulus (E) across [001]-welds fabricated by silver welding.
The residual imprints performed by a sharp tip indenter were observed by Field Emission
Scanning Electron Microscope (FE-SEM) to investigate the different fracture mechanisms
nucleated during the indentation process. Results show a decrease of the nanohardness across
the grain boundary related to the appearance of a “welding path” free of Y-211 particles. The
FE-SEM images show chipping and sink-in effects in that region. Remarkably, for zero-angle
welds the mechanical properties are unaltered across the joint, thus probing the high quality of
silver welds for large-scale applications. |
Abstract:
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Peer Reviewed |
Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria dels materials -Superconductors -Superconductors d'alta temperatura -- Propietats mecàniques -Nanotecnologia |
Rights:
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Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
Document type:
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Article - Published version Article |
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