Critical current degradation under transverse compressive stress in YBCO-coated superconductive tapes

Otten, S. and Lagraauw, R. (2012) Critical current degradation under transverse compressive stress in YBCO-coated superconductive tapes.

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Abstract:Before magnets can be produced from high-Tc superconductors, understanding of the electrical and mechanical properties is needed. In this report the effect of transverse stress on the critical current of an YBCO-coated conductor (SuperPower SCS4050) is investigated. Pressures up to 1 GPa were applied using a press. Five different pushing head were used to examine the effect of different stress patterns. All the experiments were performed in liquid nitrogen (T = 77K). Afterwards, the conductor was delaminated and microscopic images of the YBCO layer were made to analyze the damage. From the data it was concluded that, for most stress patterns, the critical current degrades at lower pressures when the pushing head pushes on the non-coated side of the conductor. Also pushing in the center of the non-coated side causes more degradation than pushing on the sides. Microscopic images showed that most of the damage occurred at the edges of the stress area, probably caused by the high local deformation.
Item Type:Essay (Bachelor)
Faculty:TNW: Science and Technology
Subject:33 physics
Programme:Applied Physics BSc (56962)
Link to this item:http://purl.utwente.nl/essays/62905
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