Control of texture in Ag and Ag-alloy substrates for superconducting tapes
Control of texture in Ag and Ag-alloy substrates for superconducting tapes
复制标题
超导带用银和银合金基材的织构控制
DOI：
10.1088/0953-2048/13/9/319
复制
发表时间：
2000
影响因子：
3.6
通讯作者：
C. Grovenor
中科院分区：
文献类型：
--
作者：
T. A. Gladstone;J. Moore;B. M. Henry;S. Speller;C. Salter;A. Wilkinson;C. Grovenor
使用双轴织构的银带作为高温超导体（HTS）相的衬底是朝向制造高Jc超导带的一种可能路线。使用冷轧和退火工艺，我们可重复制造{110}110织构银，其在高达900 °C下稳定。我们已经发现，有两个关键的工艺要求，形成这种纹理;在变形前的材料中的低氧含量，和冷轧厚度减少小于97%。为了克服与纯银的差的机械强度相关的问题，已经研究了具有改善的机械性能的Ag-Mg和Ag-Hf合金中的织构发展。在还原性气氛中进行热处理，可以在Ag-0.1wt%Mg中获得{110}110退火织构。本文还研究了层错能增加的Ag-Pd合金的再结晶行为，在这种材料中获得了部分立方织构。使用取向分布函数（ODF）分析，我们已经表明，在两个纯银和Ag基合金的变形织构的微小变化，可以导致显着差异的再结晶织构获得。
The use of a biaxially textured silver tape as a substrate for high temperature superconductor (HTS) phases is one possible route towards the fabrication of high-Jc superconducting tape. Using a cold-rolling and annealing process we have reproducibly fabricated {110}110 textured silver which is stable up to 900 °C. We have found that there are two critical process requirements for the formation of this texture; a low oxygen content in the material prior to deformation, and a cold-rolling thickness reduction of less than 97%. To overcome the problems associated with the poor mechanical strength of pure silver, texture development in Ag-Mg and Ag-Hf alloys with improved mechanical properties has been studied. Heat treatments in a reducing atmosphere allow the {110}110 annealing texture to be obtained in Ag-0.1 wt%Mg. The recrystallization behaviour of a Ag-Pd alloy with an increased stacking fault energy was also investigated and a partial cube texture was obtained in this material. Using orientation distribution function (ODF) analysis we have shown that minor variations in the deformation texture of both pure silver and Ag-based alloys can lead to significant differences in the recrystallization textures obtained.