Behavior and effect of natural refinement of Sm2BaCuO5 derived from homogeneous nucleation catastrophe in bulks

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS Journal of the American Ceramic Society Pub Date : 2024-07-25 DOI:10.1111/jace.20011

Simin Huang, Yiqian Yin, Yanhan Zhu, Kun Liang, Pavel Diko, Monika Radusovska, Xin Yao

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Abstract

Among the REBa₂Cu₃O_7-δ (REBCO or RE123, RE = rare earth element) family, SmBCO is preferably used in top-seeded melt-growth (TSMG) because of its outstanding property and more controllable stoichiometry 123. Nevertheless, the refinement of Sm₂BaCuO₅ (Sm211) particles has been challenging for high-performance SmBCO bulks. Conventional precursor powders (SmBa₂Cu₃O_7-δ plus Sm₂BaCuO₅) intrinsically result in enlarging Sm₂BaCuO₅ particles due to their coarsening and epitaxial growth during the heating process. Here, we used modified precursor powders (MPPs, Sm₂O₃ plus Ba₂Cu₃O₅) in air-processed TSMG, in which there is neither Sm211 in the beginning nor related enlargement during heating. Consequently, the nucleation catastrophe of Sm211 occurred above the peritectic temperature, which in situ formed, possessing naturally small size. Further, aiming to suppress the Sm/Ba substitution, Ba-rich MPP, substituting Ba₂Cu₃O₅ with Ba₃Cu₄O₇) was employed, producing an excellent SmBCO bulk with a diameter of 24 mm: levitation force of 51.5 N and trapped field of 0.537 T. Optical micrographs and quantitative analyses confirmed the superior refinement and distribution of Sm211 particles in SmBCO bulks. Most importantly, new strategies in this work are widely applicable for developing cost-effective and high-performance other REBCO bulk superconductors.

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源自块体均相成核灾难的 Sm2BaCuO5 的自然细化行为及其影响

在 REBa2Cu3O7-δ（REBCO 或 RE123，RE = 稀土元素）家族中，SmBCO 因其出色的性能和更可控的化学计量 123 而被优先用于顶部播种熔融生长（TSMG）。然而，Sm2BaCuO5（Sm211）颗粒的细化对于高性能 SmBCO 块体来说一直是个挑战。传统的前驱体粉末（SmBa2Cu3O7-δ 加 Sm2BaCuO5）在加热过程中会发生粗化和外延生长，从而导致 Sm2BaCuO5 颗粒增大。在这里，我们将改性前驱体粉末（MPPs，Sm2O3 加 Ba2Cu3O5）用于空气处理 TSMG，在这种粉末中，既没有开始时的 Sm211，也没有加热过程中的相关增大。因此，Sm211 的成核灾难发生在包晶温度之上，它在原位形成，具有天然的小尺寸。此外，为了抑制 Sm/Ba 替代，采用了富含 Ba 的 MPP（用 Ba3Cu4O7 替代 Ba2Cu3O5），生产出了直径为 24 mm 的优异 SmBCO 块体：悬浮力为 51.5 N，俘获场为 0.537 T。最重要的是，这项工作中的新策略可广泛应用于开发具有成本效益和高性能的其他 REBCO 体超导体。

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来源期刊

Journal of the American Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

7.50

自引率

7.70%

发文量

590

审稿时长

2.1 months

期刊介绍： The Journal of the American Ceramic Society contains records of original research that provide insight into or describe the science of ceramic and glass materials and composites based on ceramics and glasses. These papers include reports on discovery, characterization, and analysis of new inorganic, non-metallic materials; synthesis methods; phase relationships; processing approaches; microstructure-property relationships; and functionalities. Of great interest are works that support understanding founded on fundamental principles using experimental, theoretical, or computational methods or combinations of those approaches. All the published papers must be of enduring value and relevant to the science of ceramics and glasses or composites based on those materials. Papers on fundamental ceramic and glass science are welcome including those in the following areas: Enabling materials for grand challenges[...] Materials design, selection, synthesis and processing methods[...] Characterization of compositions, structures, defects, and properties along with new methods [...] Mechanisms, Theory, Modeling, and Simulation[...] JACerS accepts submissions of full-length Articles reporting original research, in-depth Feature Articles, Reviews of the state-of-the-art with compelling analysis, and Rapid Communications which are short papers with sufficient novelty or impact to justify swift publication.