用于YBCO高温超导涂层的立方织构铜基带制备  

Preparation of cubic texturing of Cu sheets for YBCO HTS films

作　　者：李英楠[1] 李凤华[1] 高峰[1] 樊占国[1] 

机构地区：[1]东北大学材料与冶金学院,沈阳110004

出　　处：《低温与超导》2008年第11期34-36,共3页Cryogenics and Superconductivity

基　　金：国家自然科学基金(50702012);辽宁省博士启动基金(20071017)资助

摘　　要：Cu是制备双轴织构YBCO高温超导涂层的优良基带材料之一,立方织构的铜带可以提供良好的外延生长环境。文中采用轧制辅助双轴织构基带技术(RABiTS),研究了立方织构铜基带的制备工艺。将铜锭在初轧变形量达到88.4%后,进行400℃退火30min,再经二次轧制总变形量达到99.07%后,在氩气环境125—850℃之间不同温度下退火30min。用March-Dollase函数计算该系列样品的r值,其中850℃退火的样品具有最强的200择优取向,r值为0.25,用不完整极图对该样品的织构情况做进一步分析,用ODF函数定量计算了该样品立方织构的体积百分含量。该样品形成了较强的{001}<100>立方织构,体积百分含量为70.8%。Cu is one of good materials as a substrate for producing biaxially textured YBCO superconductor films, and the cubic texturing of Cu sheets can supply compatible environment for epitaxial growth. Using the rolling - assisted biaxially textured substrates （RABiTS） technique, the present work reported the preparation process for cubic texturing of Cu sheets. The copper ingot was wiled firstly to a tape with 88.4% total thickness reduction and annealed at 400℃ for 30min in argon. The annealed tape was further cold rolled to a tape with 99.07% total thickness reduction and annealed at a temperature from 125 to 850℃ for 30min in argon atmosphere. The March - Dollase coefficient value r was calculated for the samples of different secondary annealed temperature. The sample after annealing at 850℃ formed the best 200 preferred orientation, r was 0.25. Uncompleted pole figure was used to make a further analysis for the sample＇s texture, and orientation distribution function ODF was performed to calculated quantitative texture components. The sample exhibited sharp {001} 〈 100 〉 cubic texture, cubic texture fraction was 70.8%.

关 键 词：择优取向 再结晶 冷轧 织构 March—Dollase函数 

分 类 号：TM535.1[电气工程—电器] TM26[一般工业技术—材料科学与工程]