Internal Strain Behavior Exerted on YBCO Layer in the YBCO Coated Conductor
Internal Strain Behavior Exerted on YBCO Layer in the YBCO Coated Conductor
复制标题
YBCO 涂层导体中 YBCO 层的内应变行为
DOI：
10.1109/tasc.2010.2086038
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
and M Sugano
中科院分区：
文献类型：
--
作者：
K Osamura;S Machiya;Y Tsuchiya;S Harjo;H Suzuki;T Shobu;K Kiriyama;and M Sugano
用白色X射线和脉冲中子精确地研究了Cu稳定YBCO涂层导体弹性性能的应力应变关系。多个衍射峰被观察到沿着轴向和横向方向与磁带轴作为拉伸载荷的函数。明确了施加在YBCO层上的以下不寻常的应力/应变行为。（020）/（200）和（040）/（400）衍射峰排列成两排，衍射强度随拉伸载荷的增加几乎不变。衍射应变与外应变之比小于1。由（0 k 0）衍射峰估算的衍射弹性常数大于由（h 00）衍射峰估算的衍射弹性常数。他们的观察强烈表明，微观孪晶结构是理解衍射实验中获得的微观弹性常数和应变的关键纳米结构。
The stress/strain dependence of elastic property of the surround Cu stabilized YBCO coated conductor was precisely investigated by means of white X-ray and pulsed neutrons. Multiple diffraction peaks were observed along axial and lateral directions with the tape axis as a function of tensile load. The following unusual stress/strain behaviors exerted on the YBCO layer were made clear. Pairs of (020)/(200) and (040)/(400) were observed side by side in two rows and their diffraction intensity was almost constant with increasing tensile load. The ratio of diffraction strain to external strain became less than unity. The diffraction elastic constants estimated from (0k0) diffraction peaks were larger than from (h00) peaks. Their observations strongly suggest that the micro twin structure is key nanostructure to understand the microscopic elastic constant and strain obtained from the diffraction experiments.