轻质、高韧性且耐用的钇钡铜氧超导体。

Lightweight, highly tough and durable YBaCuO superconductor.

作者信息

Zhang Baoqiang, Zhang Xingyi, Zhou You-He

机构信息

Key Laboratory of Mechanics on Disaster and Environment in Western China attached to the Ministry of Education of China, Lanzhou University, Lanzhou 730000, China.

Department of Mechanics and Engineering Sciences, College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, China.

出版信息

Natl Sci Rev. 2023 Feb 10;10(3):nwad030. doi: 10.1093/nsr/nwad030. eCollection 2023 Mar.

DOI:10.1093/nsr/nwad030

PMID:37007749

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10062695/

Abstract

The inherent brittleness and low sustainability of YBaCuO (YBCO) bulk superconductor seriously impede its wide applications. It is a great challenge to achieve toughening of this material and maintain its invariable superconductivity at the same time. Here, we fabricate bulk YBCO composite superconductor with a density of 2.15 g cm, which consists of interlocking dual network construction and shows high toughness and durability. The results show that its unit normalized fracture energy at 77 K reaches 638.6 kN m, which is ∼14.8 times that of YBCO bulk prepared by the top-seeded melt textured growth (TSMTG) method. Its critical current shows no degradation during the toughening process. Moreover, after 10 000 cycles, the sample does not fracture with the decay of critical current at 4 K of 14.6% whereas the TSMTG sample fractures only after 25 cycles.

摘要

钇钡铜氧（YBCO）块体超导体固有的脆性和低可持续性严重阻碍了其广泛应用。同时实现这种材料的增韧并保持其超导性不变是一项巨大挑战。在此，我们制备了密度为2.15 g/cm³的YBCO块体复合超导体，其由互锁双网络结构组成，具有高韧性和耐久性。结果表明，其在77 K时的单位归一化断裂能达到638.6 kN/m，约为顶部籽晶熔融织构生长（TSMTG）法制备的YBCO块体的14.8倍。其临界电流在增韧过程中没有退化。此外，经过10000次循环后，该样品在4 K时临界电流衰减14.6%的情况下未断裂，而TSMTG样品仅在25次循环后就断裂了。