ON THE DISSOCIATION OF DISLOCATIONS IN YBA2CU3O7-DELTA

被引：26

作者：

RABIER, J

TALL, PD

DENANOT, MF

机构：

[1] Laboratoire de Métallurgie Physique, Unité de Recherche associée au CNRS 131, Poitiers Cedex

来源：

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES | 1993年 / 67卷 / 04期

关键词：

D O I：

10.1080/01418619308213973

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The fine structure of dislocations with [100] Burgers vectors in YBa2Cu3O7-delta ceramics were characterized by transmission electron microscopy after various thermomechanical treatments. Dissociation widths are larger after high-temperature treatments, and it is found that, even at room temperature, dissociations of dislocations are associated with a local non-stoichiometry. The dissociation reaction can be written as [100]-->1/6[301]+1/6[301BAR] on the (001) plane; this involves the addition of a CuO layer in the 1:2:3 matrix at the dislocation core. Mechanisms involved in this non-stoichiometric splitting of dislocations are discussed.

引用

页码：1021 / 1035

页数：15

共 17 条

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