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Title: Fracture micromechanisms and mechanical behavior of YBCO bulk superconductors at 77 and 300 K
Author: Konstantopoulou, K.
Roa Rovira, Joan Josep
Jiménez Piqué, Emili
Segarra Rubí, Mercè
Pastor, J. Y.
Keywords: Superconductors
Propietats mecàniques
Mechanical properties
Low temperature engineering
Issue Date: 2-May-2014
Publisher: Elsevier B.V.
Abstract: In this study two YBa2Cu3O7-delta bulk superconductors were evaluated, with the aim of analyzing the influence of the processing method (TSMG and Bridgman) and the test temperature on their mechanical behavior. The relationship between their mechanical properties and fracture micromechanisms has also been studied. Both materials were tested at room and at service temperature. TPB tests were carried out to determine their mechanical behavior, strength and toughness. Moreover, one of the two materials, characterized by transversal microstructural anisotropy, was tested in two directions. Hardness of both materials at nano and micro scale was studied. The results show that the mechanical behavior of the materials is controlled by the defects and cracks that have been introduced during the processing of the materials. A good degree of agreement was found between the experimental crack defects detected by means of SEM and those gathered from the fracture mechanical analysis of the experimental data.
Note: Versió postprint del document publicat a:
It is part of: Ceramics International, 2014, vol. 40, num. 8, p. 12797-12806
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ISSN: 0272-8842
Appears in Collections:Articles publicats en revistes (Ciència dels Materials i Química Física)

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