MICROSTRUCTURAL CHARACTERISTICS OF MELT-POWDER-MELT-GROWN YBA2CU3O7-X CRYSTALS

被引：16

作者：

MILETICH, R

MURAKAMI, M

PREISINGER, A

WEBER, HW

机构：

[1] UNIV VIENNA,INST MINERAL & KRISTALLOG,A-1010 VIENNA,AUSTRIA

[2] INT SUPERCONDUCT TECHNOL CTR,SUPERCONDUCT RES LAB,TOKYO 135,JAPAN

[3] UNIV WIEN,INST MINERAL KRISTALLOG & STRUKT TECH,A-1060 VIENNA,AUSTRIA

来源：

PHYSICA C | 1993年 / 209卷 / 04期

关键词：

D O I：

10.1016/0921-4534(93)90554-4

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Melt-powder-melt-grown crystals of high-T(c) YBa2Cu3O7-x were prepared from different chemical starting compositions. They all show well textured microstructures with characteristic differences and various amounts of included phases (Y2BaCuO5, Ba4Cu2PtO9, and metallic silver) depending on the starting composition. Detailed investigations with polarized reflected light, XRF, EDX and X-ray diffraction reveal characteristic features of the microstructure such as the distribution of included phases as well as twinning and crack formation, which are related to local variations in oxygen content in these materials. Increasing silver contents result in a reduction of cracking. The occurrence of domain-like regions with distinct large twin lamellae is correlated with the distribution of Y2BaCuO5 inclusions.

引用

页码：415 / 420

页数：6

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