Fracture toughness of Dy123 low porosity bulks at liquid nitrogen temperature

► Fracture toughness values were measured for Dy123 bulks. ► Fracture toughness was improved by reducing porosity. ► Fracture toughness values at 77 K were higher than those at room temperature. ► Fracture toughness was also improved by Ag addition. In order to evaluate the fracture toughness of DyB...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 2011-11, Vol.471 (21-22), p.884-888
Main Authors: Murakami, A., Otaka, K., Miura, T., Iwamoto, A.
Format: Article
Language:English
Subjects:
Ag addition
Bend tests
Bending test
Dy123 bulk
Fracture toughness
Liquid nitrogen
Porosity
Silver
Superconductivity
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Summary:► Fracture toughness values were measured for Dy123 bulks. ► Fracture toughness was improved by reducing porosity. ► Fracture toughness values at 77 K were higher than those at room temperature. ► Fracture toughness was also improved by Ag addition. In order to evaluate the fracture toughness of DyBa2Cu3Ox (Dy123) low porosity bulks, bending tests of V-notched specimens cut from the bulks were carried out. Fracture toughness evaluations of a conventional Dy123 bulk which had pores were also carried out and effects of elimination of pores on the fracture toughness were investigated. Fracture toughness values at 77K of the low porosity bulks were higher than those of the porous bulk. These fracture toughness values at 77K were higher than the values at room temperature. Fracture toughness of the low porosity bulk was improved by Ag addition.
ISSN:0921-4534
1873-2143
DOI:10.1016/j.physc.2011.05.080