Stress-strain behavior under static loading in Gd123 high-temperature superconductors at 77 K

Mechanical properties of melt-growth GdBa sub(2)Cu sub(3)O sub(x) (Gd123) superconducting samples with 10 wt.% Ag sub(2)O and 0.5 wt.% Pt were evaluated at 77 K through flexural tests for specimens cut from the samples in order to estimate the mechanical properties of the Gd123 material without meta...

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Bibliographic Details
Published in:Cryogenics (Guildford) 2013-10, Vol.57, p.6-11
Main Authors: Fujimoto, H, Murakami, A, Teshima, H, Morita, M
Format: Article
Language:English
Subjects:
Estimates
Flexural strength
Fracture mechanics
Mechanical properties
Modulus of elasticity
Modulus of rupture in bending
Stabilization
Stress-strain relationships
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Summary:Mechanical properties of melt-growth GdBa sub(2)Cu sub(3)O sub(x) (Gd123) superconducting samples with 10 wt.% Ag sub(2)O and 0.5 wt.% Pt were evaluated at 77 K through flexural tests for specimens cut from the samples in order to estimate the mechanical properties of the Gd123 material without metal substrates, buffer layers or stabilization layers. We discuss the mechanical properties; the Young's modulus and flexural strength with stress-strain behavior at 77 K. The results show that the flexural strength and fracture strain of Gd123 at 77 K are approximately 100 MPa and 0.1%, respectively, and that the origin of the fracture is defects such as pores, impurities and non-superconducting compounds. We also show that the Young's modulus of Gd123 is estimated to be 160-165 GPa.
ISSN:0011-2275
DOI:10.1016/j.cryogenics.2013.04.001