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dc.contributor.authorKonstantopoulou, Ken
dc.contributor.authorShi, Yunhuaen
dc.contributor.authorDennis, Tonyen
dc.contributor.authorDurrell, Johnen
dc.contributor.authorPastor, JYen
dc.contributor.authorCardwell, Daviden
dc.identifier.citation(2014) Superconductor Science and Technology 27(11): 115011en
dc.description.abstractYBaCuO and GdBaCuO + 15 wt% Ag large, single grain, bulk superconductors have been fabricated via the top seeded melt growth (TSMG) process using a generic NdBCO seed. The mechanical behavior of both materials has been investigated by means of three-point bending (TPB) and transversal tensile tests at 77 and 300 K. The strength, fracture toughness and hardness of the samples were studied for two directions of applied load to obtain comprehensive information about the effect of microstructural anisotropy on the macroscopic and microscopic mechanical properties of these technologically important materials. Splitting (Brazilian) tests were carried out on as-melt processed cylindrical samples following a standard oxygenation process and with the load applied parallel to the growth facet lines characteristic of the TSMG process. In addition, the elastic modulus of each material was measured by three different techniques and related to the microstructure of each sample using optical microscopy. The results show that both the mechanical properties and the elastic modulus of both YBCO and GdBCP/Ag are improved at 77 K. However, the GdBCO/Ag samples are less anisotropic and exhibit better mechanical behavior due to the presence of silver particles in the bulk, superconducting matrix. The splitting tensile strength was determined at 77 K and both materials were found to exhibit similar behavior, independently of their differences in microstructure.
dc.publisherIOP Publishing
dc.rightsAttribution 2.0 UK: England & Wales
dc.rightsCreative Commons Attribution License 2.0 UK
dc.titleMechanical characterization of GdBCO/Ag and YBCO single grains fabricated by top-seeded melt growth at 77 and 300 Ken
dc.description.versionThis is the final published version. It is published by IOP Publishing in Superconductor Science and Technology here:
prism.publicationNameSuperconductor Science and Technologyen
dc.rioxxterms.funderMinisterio de Economia y Competitividad of Spain; Engineering and Physical Science Research Council
dc.rioxxterms.projectidMinisterio de Economia y Competitividad of Spain: MAT2012-38541-C02-02
dc.contributor.orcidDennis, Tony [0000-0003-4962-7149]
dc.contributor.orcidDurrell, John [0000-0003-0712-3102]
dc.contributor.orcidCardwell, David [0000-0002-2020-2131]
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idEPSRC (EP/P00962X/1)

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Attribution 2.0 UK: England & Wales
Except where otherwise noted, this item's licence is described as Attribution 2.0 UK: England & Wales