COMPOSITE SUBSTRATES FOR HIGH TEMPERATURE SUPERCONDUCTORS HAVING IMPROVED PROPERTIES

摘要

A composite substrate for superconductors and methods for making the same are described. The composite substrate of the present invention includes at least a core layer having and a sheath layer having a cube texture on at least a portion its surface. In certain embodiments, the core layer can include a nickel-tungsten- molybdenum alloy having about 2-10 atomic percent tungsten and 2-15 atomic percent molybdenum. In some embodiments, the sheath layer can include nickel or a nickel-tungsten alloy having about 0 to 6 atomic percent tungsten. Generally, the core layer is stronger than the sheath layer and an interdiffusion zone can exist between the core layer and the sheath layer.