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Ciência & Tecnologia dos Materiais

versão impressa ISSN 0870-8312

Resumo

KONSTANTOPOULOU, K.; PASTOR, J. Y.; ROA, J. J.  e  SEGARRA, M.. Comportamiento mecánico de materiales masivos superconductores de segunda generación en función de la temperatura. C.Tecn. Mat. [online]. 2010, vol.22, n.3-4, pp.40-47. ISSN 0870-8312.

In the present study, have been researched two superconductor bulk materials of YBaCuO, with the aim of analyzing the influence of the processing method (Bridgman and Top-Seeding Melt Growth) and the test temperature in their mechanical behaviour. Both of them have been tested at room temperature (300 K) and at service temperature (77 K). Three point bending tests have been carried out, in order to measure the mechanical strength and the fracture toughness. Moreover, one of the two materials, which present transversal microstructural anisotropy, has been tested for the both more relevant directions. The obtained results show that the mechanical behaviour of the material is controlled by the defects and cracks, that have been introduced during the processing and therefore, in order to improve the mechanical properties, the amount and the size of the defects should be reduced.

Palavras-chave : YBaCuO; mechanical behaviour; superconductors; cryogenic.

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