Improving the microstructure and levitation performance of YBa2Cu3O7-δ bulks with combined-modified precursor powder for HTS maglev

磁悬浮列车 悬浮 磁悬浮 材料科学 超导电性 微观结构 多孔性 复合材料 凝聚态物理 机械工程 磁铁 电气工程 物理 工程类
作者
Xiwen Zhang,Tingting Li,Yonghai Zhao,Xin Yao,Difan Zhou,Zigang Deng
出处
期刊:Superconductor Science and Technology [IOP Publishing]
标识
DOI:10.1088/1361-6668/ad9ee2
摘要

Abstract High-temperature superconducting (HTS) pinning magnetic levitation (Maglev) vehicles employ HTS bulk superconductors to achieve its unique levitation and guidance feature above the track, making it a promising Maglev vehicle system. However, few studies consider customizing HTS bulk superconductors for a specific application, particularly in the HTS Maglev system, which hinders its development. In this study, a novel approach is introduced, in which the Combined-Modified Precursor Powder (C-MPP) is used to enhance the mechanical and superconducting properties of YBa 2 Cu 3 O 7-δ (YBCO or Y123) bulks, which are crucial for HTS pinning Maglev system. The C-MPP method integrates conventional precursor powder (CPP) with modified precursor powder (MPP) in a layered configuration. The large-size YBCO bulks prepared by C-MPP reveal that C-MPP samples exhibit reduced deformation and shrinkage compared to MPP, and alleviate the issue of high porosity. Levitation force measurements indicate that C-MPP can provide superior superconducting properties over CPP. Additionally, in consideration of the realistic application settings, a general method is proposed for comparing the levitation force across samples of different sizes, providing a valuable methodology for evaluating the potential of HTS bulks for researchers and engineers. The findings suggest that the C-MPP technique represents a viable advancement for enhancing the efficiency and reliability of the HTS pinning Maglev system in future high-speed transit solutions.
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