Lightweight, highly tough and durable YBa_(2)Cu_(3)O_(7-x) superconductor  

作　　者：Baoqiang Zhang Xingyi Zhang You-He Zhou 

机构地区：[1]Key Laboratory of Mechanics on Disaster and Environment in Western China attached to the Ministry of Education of China,Lanzhou University,Lanzhou 730000,China [2]Department of Mechanics and Engineering Sciences,College of Civil Engineering and Mechanics,Lanzhou University,Lanzhou 730000,China

出　　处：《National Science Review》2023年第3期3-10,共8页国家科学评论（英文版）

基　　金：supported by the National Natural Science Foundation of China (11872196);the Outstanding Postgraduate ‘Innovation Star’ Foundation for Distinguished of Gansu Province (2021CXZX-032)。

摘　　要：The inherent brittleness and low sustainability of YBa_(2)Cu_(3)O_(7-x)(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^(-3),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 reaches638.6 kN m^(-2),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.

关 键 词：YBCO superconductor LIGHTWEIGHT TOUGHNESS durability interlocking dual network 

分 类 号：O511.3[一般工业技术—材料科学与工程]