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通过温轧及退火制备了强立方织构的Ag基带 ,通过冷轧及退火制备了强 {1 1 0 }双轴织构的Ag基带 ,为高温涂层超导提供了很好的基带材料。探讨了Ag基带中立方织构和 {1 1 0 }双轴织构的形成机理。得到立方织构的关键是轧制时尽量使形变过程以滑移为主 ,从而有较高的C取向 ,通过动态再结晶首先出现立方织构晶核。得到{1 1 0 }双轴织构的关键是利用Ag冷轧时黄铜取向易以孪晶方式形变的特点 ,保持B取向的稳定 ;再结晶退火时 ,利用其首先形成退火孪晶的特性 ,随后的扩散长大即以此为核心形成较强的 {1 1 0 }双轴织构。在所制备的强 {1 1 0 }〈1 1 2〉双轴织构的银带上 ,用PLD方法直接沉积的YBCO超导薄膜 ,Jc 值达到 ( 2～ 6)× 1 0 5A/cm2 ( 77K ,0T)。
A strong cubic textured Ag matrix was prepared by warm rolling and annealing. The strong {110} biaxially textured Ag matrix was prepared by cold rolling and annealing, which provided a good base material for high temperature superconducting coating. The formation mechanism of cubic texture and {1 1 0} biaxial textures in Ag matrix was discussed. The key to get the cubic texture is to make the deformation process as sliding as possible during the rolling process so as to have a higher C orientation. The cubic textured nuclei are firstly formed by dynamic recrystallization. The key to get the {1 1 0} biaxial texture is that the orientation of brass is easily twins twinned during the cold rolling of Ag, and the stability of B orientation is maintained. In the recrystallization annealing, the characteristics of the first formation of annealing twins , Followed by the proliferation and growth that is the core of the formation of a strong {1 1 0} biaxial texture. The YbCO superconducting films directly deposited by the PLD method have a Jc value of (2 ~ 6) × 10 5A / cm 2 on the prepared strong {1 1 0} <1 1 2> biaxially textured silver ribbon 77K, 0T).