Flexural strength of melt-processed Y–Ba–Cu–O bulk superconductors with Ag addition measured at 77 K
Flexural strength of melt-processed Y–Ba–Cu–O bulk superconductors with Ag addition measured at 77 K
复制标题
添加 Ag 的熔融加工 Y-Ba-Cu-O 块体超导体在 77 K 下测量的弯曲强度
DOI：
10.1088/0953-2048/16/9/325
复制
发表时间：
2003
影响因子：
3.6
通讯作者：
H. Fujimoto
中科院分区：
文献类型：
--
作者：
H. Fujimoto
高Tc氧化物超导体的机械性能，如抗弯强度、断裂韧性和延展性，以及超导性能，Tc、Jc和Hirr，对于工业应用至关重要。然而，氧化物超导体具有钙钛矿结构的固有脆性，因此材料的强度和断裂韧性低且各向异性。因此，研究和改善其力学性能，以实现结构的可靠性，对于应用非常重要。熔融处理的REBaCuO（RE =稀土）超导体在77 K和高磁场下具有高Jc，并且轻稀土（LRE）BaCuO在高磁场下具有比YBa2Cu3Ox（Y123）更大的Jc。预计高场应用，例如具有液氮制冷和飞轮的超导永磁体。本文讨论了Y2BaCuO5（Y211）颗粒和Ag的Y123合金熔体在77K下的弯曲强度，断裂面几乎垂直于（001）面。结果表明，Ag颗粒在Y123超导相中对材料的强韧化具有有益的作用。
Mechanical properties, such as flexural strength, fracture toughness and ductility, and superconducting properties, Tc, Jc and Hirr, are crucial for industrial applications of high-Tc oxide superconductors. However, oxide superconductors have the intrinsic brittleness of the perovskite structure, thus the strength and the fracture toughness of the materials are low and anisotropic. Therefore, it is very important to study and improve mechanical properties to achieve structural reliability for applications. Melt-processed REBaCuO (RE = rare earth) superconductors have a high Jc at 77 K and a high magnetic field, and light rare-earth (LRE) BaCuO has a larger Jc than YBa2Cu3Ox (Y123) in a high magnetic field. High field applications are expected, e.g. a superconducting permanent magnet with liquid nitrogen refrigeration and flywheels. In this paper, we discuss the flexural strength of melt-processed Y123 bulks with Y2BaCuO5 (Y211) particles and Ag measured at 77 K, when the fracture surface is almost perpendicular to the (001) plane. The results show the beneficial effect of Ag particles in the Y123 superconducting phase in strengthening and toughening the material.