A TEM STUDY OF GRAIN-BOUNDARIES IN ZONE-MELTED YBA2CU3OX

被引：7

作者：

CHEN, JG

SHI, DL

WAYMAN, CM

MCGINN, PJ

CHEN, WH

ZHU, N

机构：

[1] UNIV ILLINOIS,DEPT MAT SCI & ENGN,URBANA,IL 61801

[2] UNIV NOTRE DAME,DEPT ELECT ENGN,NOTRE DAME,IN 46556

来源：

MATERIALS LETTERS | 1992年 / 14卷 / 2-3期

关键词：

D O I：

10.1016/0167-577X(92)90199-T

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Grain boundaries in zone-melted YBa2Cu3Ox have been studied in detail by means of transmission electron microscopy. Tilt and twist types of low-angle grain boundaries have been observed, which are composed of both edge and screw dislocations. These boundaries possess high crystal coherence and intimate contact. The low-angle boundaries are also found to be free of second phases. Direct dc transport critical current density, J(c), at 77 K shows great improvement in the zone-melted sample compared with that of a conventionally sintered sample. The relationship between the enhanced J(c) and the low-angle grain boundaries is discussed.

引用

页码：177 / 181

页数：5

共 19 条

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