Nanoindentation of Bridgman YBCO samples

Roa, J.J. and Konstantopoulou, Konstantina and Jiménez Piqué, E. and Martín, V. and Segarra, M. and Pastor Caño, Jose Ignacio (2012). Nanoindentation of Bridgman YBCO samples. "Ceramics International", v. 38 (n. 3); pp. 2035-2042. ISSN 1361-7605.


Title: Nanoindentation of Bridgman YBCO samples
  • Roa, J.J.
  • Konstantopoulou, Konstantina
  • Jiménez Piqué, E.
  • Martín, V.
  • Segarra, M.
  • Pastor Caño, Jose Ignacio
Item Type: Article
Título de Revista/Publicación: Ceramics International
Date: April 2012
ISSN: 1361-7605
Volume: 38
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ciencia de los Materiales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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In this study, the mechanical properties of YBa2Cu3O7−x, obtained by the Bridgman technique, were examined using a Berkovich tip indenter on the basal plane (0 0 1). Intrinsic hardness was measured by nanoindentation tests and corrected using the Nix and Gao model for this material. Furthermore, Vickers hardness tests were performed, in order to determine the possible size effect on these measurements. The results showed an underestimation of the hardness value when the tests were performed with large loads. Moreover, the elastic modulus of the Bridgman samples was 128 ± 5 GPa. Different residual imprints were visualised by atomic force microscopy and a focused ion beam, in order to observe superficial and internal fracturing. Mechanical properties presented a considerable reduction at the interface. This effect could be attributed to internal stress generated during the texturing process. In order to corroborate this hypothesis, an observation using transmission electron microscopy was performed.

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Item ID: 12143
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OAI Identifier:
DOI: 10.1016/j.ceramint.2011.10.039
Deposited by: Memoria Investigacion
Deposited on: 10 Sep 2012 10:06
Last Modified: 21 Apr 2016 11:20
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