TEM Study of twist boundaries and colony boundaries in (Bi,Pb)(2)Sr2Ca2CU3Ox silver-sheathed tapes

被引：18
|
作者：
Grindatto, DP [1 ]
Hensel, B [1 ]
Grasso, G [1 ]
Nissen, HU [1 ]
Flukiger, R [1 ]
机构：
[1] UNIV GENEVA,DEPT PHYS MAT CONDENSEE,CH-1211 GENEVA 4,SWITZERLAND
来源：
PHYSICA C | 1996年 / 271卷 / 1-2期
关键词：
(Bi; Pb)(2)Sr2Ca2Cu3Ox; transmission electron microscopy (tem); grain boundaries; superconducting tape; critical current density;
D O I：
10.1016/S0921-4534(96)00517-5
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The grain boundaries in high-j(c) (Bi,Pb)(2)Sr2Ca2Cu3Ox silver-sheathed tapes have been investigated using transmission electron microscopy, The typical microstructural feature in these tapes are the colonies, which consist of grains with a common c-axis. The grains within a colony are piled up along the common c-axis and are separated by [001] twist boundaries. It was found that the rotation angle of these twist boundaries takes several definite values. Colony boundaries are formed between colonies having slightly tilted c-axes with respect to each other and are virtually free from amorphous material and intergranular phases, Two basic types of colony boundaries have been observed: the small-angle c-axis tilt boundary and the edge-on c-axis tilt boundary, The weak bonds between the BiO double layers are responsible for the mica-like crystalline structure of Bi2Sr2Can-1CunOx and their importance concerning the formation of colony boundaries is discussed.
引用
收藏
页码：155 / 163
页数：9
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