Significant improvement of trapped flux in bulk Gd–Ba–Cu–O grains fabricated by a modified top-seeded melt growth process - Archive ouverte HAL
Article Dans Une Revue Superconductor Science and Technology Année : 2013

Significant improvement of trapped flux in bulk Gd–Ba–Cu–O grains fabricated by a modified top-seeded melt growth process

Résumé

The seeded infiltration and growth of Gd–Ba–Cu–O single grains using a YBa2Cu3Oy pressed pellet as the liquid source has successfully solved the liquid source leakage problem even at Tmax ~ 1100 °C. As a development of this process, a simple but essential modification to insert a liquid source pellet at the bottom of the pre-form was made to the top-seeded melt growth process. The present method resulted in a significant enhancement of the trapped flux density of the Gd–Ba–Cu–O grains. In the growth kinetics, we interpreted that the enriched liquid source surrounding the growth front leads to a more uniform distribution of Gd2BaCuO5 in the matrix and an enlarged c-orientation growth area, which help suppress the formation of high angle grain boundaries. Furthermore, we demonstrated that the present method is of great advantage in multi-seeded processes.
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Dates et versions

hal-02150686 , version 1 (07-06-2019)

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Citer

Difan Zhou, Shogo Hara, Beizhan Li, Kun Xu, Jacques Noudem, et al.. Significant improvement of trapped flux in bulk Gd–Ba–Cu–O grains fabricated by a modified top-seeded melt growth process. Superconductor Science and Technology, 2013, 26 (1), pp.015003. ⟨10.1088/0953-2048/26/1/015003⟩. ⟨hal-02150686⟩
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