Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Mechanical characterization of GdBCO/Ag and YBCO single grains fabricated by top-seeded melt growth at 77 and 300 K
Year:2014
Research Areas
  • Characteristic of the materials
Information
Abstract
YBaCuO 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.
International
Si
JCR
Si
Title
Superconductor Science & Technology
ISBN
0953-2048
Impact factor JCR
2,758
Impact info
Datos JCR del año 2012
Volume
27
doi:10.1088/0953-2048/27/11/115011
Journal number
From page
115011
To page
115021
Month
SIN MES
Ranking
Participants
  • Autor: Konstantina Konstantopoulou . (UPM)
  • Autor: Yunhua Shi (Department of Engineering, Bulk Superconductivity Group, University of Cambridge, Trumpington)
  • Autor: Anthony Dennis (Department of Engineering, Bulk Superconductivity Group, University of Cambridge, Trumpington)
  • Autor: John Durrell (Department of Engineering, Bulk Superconductivity Group, University of Cambridge, Trumpington)
  • Autor: Jose Ignacio Pastor Caño (UPM)
  • Autor: David Cardwell (Department of Engineering, Bulk Superconductivity Group, University of Cambridge, Trumpington)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Materiales Estructurales Avanzados y Nanomateriales
  • Centro o Instituto I+D+i: CENTRO INVEST. MATERIALES ESTRUCTURALES (CIME)
  • Departamento: Ciencia de Materiales
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