Twin-boundary characteristics of melt-textured YBa2Cu3O7-x

被引：9

作者：

Muller, D

Freyhardt, HC

机构：

[1] Institut für Metallphysik, Göttingen, 37073

来源：

PHILOSOPHICAL MAGAZINE LETTERS | 1996年 / 73卷 / 02期

关键词：

D O I：

10.1080/095008396181000

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The twin-boundary characteristics of melt-textured YBa2Cu3O7-x have been investigated by transmission electron microscopy. Stoichiometric YBa2Cu3O7-x, Y2BaCuO5 phase-doped YBa2Cu3O7-x and YBa2Cu3O7-x with Y2BaCuO5 and additional Pt doping were studied. Pt leads to a drastic decrease in the bla ratio and orthorhombicity. Therefore it is proposed that Pt substitutes for the Cu atoms of the CuO chains. The thickness of the twin boundary layer is reduced with decreasing oxygen content and by Pt doping. Two different types of twin boundary are observed which differ in their interfacial energy and structure. The twin spacing is reduced with the size of the twin domains. The domain size is strongly controlled by the density of Y2BaCuO5 inclusions which act as nucleation centres for the twin formation.

引用

页码：63 / 70

页数：8

共 16 条

[1]

Amelinckx S., 1976, ELECTRON MICROS, P68

[2] DYNAMICS OF TWIN BOUNDARIES IN MARTENSITES [J].