Two-layer batch-process of YBa2Cu3Ox bulk superconductors induced by NdBa2Cu3Ox film-seeds

Duan, Yu; Cheng, Ling; Peng, Bowen; Chen, Y. Y.; Xu, Huajun; Li, H.; Yao, Xin; Ikuta, Hiroshi

doi:10.1063/1.4808087

Cited by 9 publications

(17 citation statements)

References 17 publications

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“…Firstly, the film gradually dissolves into the Ba-Cu-O melt underneath, resulting in a decrease of its thermal stability. Secondly, the concentration of Nd [128]. element in the YBCO melt near the film-seed would become lower due to its diffusion, accelerating the dissolution of the film.…”

Section: Long Tolerability Of Film-seed With Melt and Two-layer Batchmentioning

confidence: 98%

“…On the one hand, as negative factors, the film dissolves into the Ba-Cu-O melt due to the Nd solubility, while Nd elements diffuse from the film-seed owing to the Nd concentration gradient [128]. On the other hand, as positive factors, small grains in the film-seed become large arising from the coarsening phenomenon [108,128,135], while the Nd-YBCO interlayer (with higher crystallization temperature) forms between the film and the pellet, protecting the film from dissolving. In this modified MG process, because of low supersaturation in the melt, the dissolution/diffusion effect is predominant over the grain coarsening and Y-NdBCO crystallization one.…”

Section: Thermal Stability Of Film-seed In Low Supersaturated Melt Fomentioning

confidence: 99%

“…Since the existence of a temperature gradient, the actual slow-cooling starting temperature of the top layer samples is about 15°C lower than that of the bottom layer samples according to the pre-set heating procedure. Therefore, a seed/mini pellet/ main pellet construction was adopted for the bottom layer samples, because this construction has been confirmed to tolerate for a higher T max [128]. Three such samples were put on the bottom layer of the self-made SiC shelf.…”

Section: Long Tolerability Of Film-seed With Melt and Two-layer Batchmentioning

confidence: 99%

“…The trapped field distribution of the batch-processed YBCO crystals seeded by an NdBCO/YBCO/MgO film at 77 K. (a and b) Show the trapped field distribution of top and bottom layer samples, respectively[128].…”

mentioning

confidence: 99%

“…Filmseeds with and without mini-pellets are put on the precursors in the bottom layer and the top layer, respectively[128].…”

mentioning

confidence: 99%

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Peritectic melting of thin films, superheating and applications in growth of REBCO superconductors

Chen

Cui

Yao

2015

Progress in Materials Science

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Section: Long Tolerability Of Film-seed With Melt and Two-layer Batchmentioning

confidence: 98%

Section: Thermal Stability Of Film-seed In Low Supersaturated Melt Fomentioning

confidence: 99%

Section: Long Tolerability Of Film-seed With Melt and Two-layer Batchmentioning

confidence: 99%

mentioning

confidence: 99%

“…Filmseeds with and without mini-pellets are put on the precursors in the bottom layer and the top layer, respectively[128].…”

mentioning

confidence: 99%

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Peritectic melting of thin films, superheating and applications in growth of REBCO superconductors

Chen

Cui

Yao

2015

Progress in Materials Science

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Progress in Buffer-Supported Seeding Architectures for Reliable Epitaxial Growth of REBa₂Cu₃O_7−δ Bulk Cryomagnets with Superior Properties

Zhu

Zeng

et al. 2020

Crystal Growth & Design

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Large-scale REBa2Cu3O7−δ (REBCO, RE = rare earth elements) superconducting crystals, whose excellent electromagnetic properties have been discovered over 30 years, possess considerable potential for scientific research and engineering applications. However, further development of these materials has been hindered by the lack of reliable fabrication processes. The controlled nucleation and growth of REBCO bulk cryomagnets for obtaining high crystallographic orientation and superior superconducting performance are strongly dependent on the seeding technique, including seed material, seeding architecture and seeding mode. In the most recent decade, a buffer layer technology has been developed for the growth of REBCO single grains, greatly enhancing the effectiveness of seeds. An overview of the most recent progress in seeding technology is presented by highlighting the advanced buffer-assisted seeding architectures. Distinctive functions of buffers are summarized as blocking the mutual contamination between the seed and the main pellet, enhancing seeding thermal stability by a seed/buffer layer structure and improving the bulk crystallinity as a larger secondary homoseed. The presented strategy gives valuable insight into the underlying mechanisms and provides tools for the seeding structural design in the growth of REBCO superconductors, which is scalable and can be extended to more functional oxide systems.

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Effective Approach to Prepare Well c-Axis-Oriented YBCO Crystal by Top-Seeded Melt-Growth

Wang

Peng

Chen

et al. 2014

Crystal Growth & Design

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The growth of large single crystals of YBCO is a matter of significant importance in the study of superconductivity by neutron scattering experiments. For this reason, a well c-axis-oriented YBCO crystal with a size of 34 mm in diameter was successfully fabricated by modified melt-growth. First, our findings show that the thermal stability of the film-seed could be enhanced by introducing an intermediate mini-pellet between film and bulk. Furthermore, we present evidence to prove that the serious liquid loss could be suppressed by the CeO2 addition. Finally, the interesting question we addressed is the nature of the formation of distinctive growing macrostructures, such as ambiguous growth facet lines, and the corner-concaved a–b plane. Most importantly, apart from YBCO, our new approach strongly suggests the possibility of synthesizing large crystals for more attractive members in its family, i.e., chemically doped YBCO materials, being unsuccessful by the prior art crystal growth methods.

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Two-layer batch-process of YBa2Cu3Ox bulk superconductors induced by NdBa2Cu3Ox film-seeds

Abstract: Articles you may be interested inRecycling failed bulk YBCO superconductors using the NdBCO/YBCO/MgO film-seeded top-seeded melt growth method

Cited by 9 publications

References 17 publications

Peritectic melting of thin films, superheating and applications in growth of REBCO superconductors

Peritectic melting of thin films, superheating and applications in growth of REBCO superconductors

Progress in Buffer-Supported Seeding Architectures for Reliable Epitaxial Growth of REBa₂Cu₃O_7−δ Bulk Cryomagnets with Superior Properties

Effective Approach to Prepare Well c-Axis-Oriented YBCO Crystal by Top-Seeded Melt-Growth

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Two-layer batch-process of YBa2Cu3Ox bulk superconductors induced by NdBa2Cu3Ox film-seeds

Abstract: Articles you may be interested inRecycling failed bulk YBCO superconductors using the NdBCO/YBCO/MgO film-seeded top-seeded melt growth method

Cited by 9 publications

References 17 publications

Peritectic melting of thin films, superheating and applications in growth of REBCO superconductors

Peritectic melting of thin films, superheating and applications in growth of REBCO superconductors

Progress in Buffer-Supported Seeding Architectures for Reliable Epitaxial Growth of REBa2Cu3O7−δ Bulk Cryomagnets with Superior Properties

Effective Approach to Prepare Well c-Axis-Oriented YBCO Crystal by Top-Seeded Melt-Growth

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Product

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Progress in Buffer-Supported Seeding Architectures for Reliable Epitaxial Growth of REBa₂Cu₃O_7−δ Bulk Cryomagnets with Superior Properties