Bending strain investigations on BSCCO(2223) tapes at 77 K applying a new bending technique
Bending strain investigations on BSCCO(2223) tapes at 77 K applying a new bending technique
复制标题
应用新的弯曲技术在 77 K 下对 BSCCO(2223) 胶带进行弯曲应变研究
DOI：
10.1063/1.1472575
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
A. Nyilas
中科院分区：
文献类型：
--
作者：
W. Goldacker;S. Schlachter;R. Nast;H. Reiner;S. Zimmer;H. Kiesel;A. Nyilas
研制了一种新的弯曲装置，它可以在77K下连续改变BSCCO带材的弯曲半径，并同时测量临界电流。样品被自由地安装在两个夹子之间。这种布置的特殊几何形状确保了在整个范围内在圆线上具有均匀曲率的样本形状，而不需要机械部件的帮助。该弯曲应变试验台避免了由于从室温(弯曲)到77K(临界电流测量)冷却而产生的额外热应力的影响。我们主要介绍了对不同的Ag/aGMG护套标准导体的测量。将新方法得到的结果与用常规方法测量的弯曲应变行为进行比较，并在RT下应用弯管。讨论了该方法在标准化弯曲实验中的应用潜力。
A new bending device was developed which allows continuous change of the bending radius of the BSCCO tape sample at 77 K and a simultaneous measurement of the critical currents. The samples are mounted free between two clamps. The special geometry of the arrangement insures over the whole range a sample shape with homogeneous curvature on a circle line without the help of mechanical parts. This bending strain rig avoids effects from additional thermal stresses due to the cooling from room temperature (bending) to 77 K (critical current measurement). We mainly present measurements on different Ag/AgMg sheathed standard conductors. The results obtained with the new method will be compared for some selected samples with the bending strain behavior measured in the conventional way, applying the bent at RT. The potential of the method being suitable for standardized bending experiments will be discussed.