YBCO厚膜用高变形率Ni基带中的加工和退火织构  

Rolling and Recrystallization Textures in a Ni Substrate with High Reduction for YBCO Films

作　　者：刘春芳[1] 吴宣[1] 王飞云[1] 杨志军[1] 冯勇[1] 张平样 吴晓祖[1] 周廉[1] 

机构地区：[1]西北有色金属研究院,西安710016

出　　处：《稀有金属材料与工程》1999年第5期269-272,共4页Rare Metal Materials and Engineering

基　　金：国家超导研究开发项目(批准号:863-CD030105)

摘　　要：系统研究了高变形率Ni基带中的加工和退火织构。用高纯Ni板（99．99％）为初始坯料进行高变形率室温轧制，加工率分别为80％，89％，93％和95％。对加工率为95％的试样在750℃，800℃，850℃，900℃，950℃和1000℃进行5h再结晶退火。用X射线衍射、极图、取向分布函数等方法分析；讨论了Ni基带加工织相，再结晶退火织构的形成和发展。结果表明：随总冷加工率的增加，在Ni基带的加工织构中，沿β取向线的｛112｝<111>和｛123｝<634>织构成分增加,｛110｝<112>绿构成分较低；总冷加工率为95％的试样中，随再结晶退火温度的增加，立方级构的体积分数逐渐增加，φ扫描的FWHM变窄；当再结晶退火温度较低时，立方织相成分偏离正常位置12°～13°，随退火温度的增加，如在1000℃退火，立方织相成分偏离正常位置程度逐渐缩小，变成sharp立方织构。Rolling and recrystailization textures in a Ni substrate deformed to 80%~95% reduction have been investigated systematically in the processing of a high quality cube textured substrate for YBCO thick films. The starting high purity (99. 99%) Ni sheetwas deformed at room temperature to 80%, 89%, 93% and 95% reduction. The sample with 95% reduction was heat treated at750℃,800℃, 850℃, 900℃, 950℃ and 1 000℃ for 5h. The formation and evolution of rolling and recrystallization textures wereinvestigated by X ray Pole figure measurement and the results quantified in terms of the orientation distribution function (ODF). Theresults show that the C { 112 } <111?and S (123) <634> orientation densities increase with increasing reductions, the cube texture volumefraction increases and the 9 scan full width at half maximum (FWHM) decreases with increasing heat-treatment temperature. Thecube texture deviates from its regular POsition in the range of 12° to 13° at lower heat treatment temperature. As the heat-treatmenttemperature increase towards 1000℃, the deviation from regu1ar position decreases, and a sharp cube texture develops.

关 键 词：YBCO厚膜 高变形率 Ni基带 加工 退火织构 

分 类 号：TM262[一般工业技术—材料科学与工程]