Microstructural characterization of quenched melt-textured YBa2Cu3O7-delta materials

被引：14

作者：

Alarco, JA ^{[1
]}

Olsson, E ^{[1
]}

Golden, SJ ^{[1
]}

Bhargava, A ^{[1
]}

Yamashita, T ^{[1
]}

Barry, J ^{[1
]}

Mackinnon, IDR ^{[1
]}

机构：

[1] CHALMERS UNIV TECHNOL,DEPT PHYS,S-41296 GOTHENBURG,SWEDEN

来源：

JOURNAL OF MATERIALS RESEARCH | 1997年 / 12卷 / 03期

关键词：

D O I：

10.1557/JMR.1997.0095

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructure of YBa2Cu3O7-delta (YBCO) materials, melt-textured in air and quenched from the temperature range 900-990 degrees C, has been characterized using a combination of x-ray diffractometry, optical microscopy, scanning electron microscopy, transmission electron microscopy, and energy dispersive x-ray spectrometry. BaCu2O2 and BaCuO2 were found to coexist in samples quenched from the temperature range 920-960 degrees C. The formation of BaCu2O2 preceded the formation of YBCO. Once the YBCO had formed, BaCu2O2 was present at the solidification front filling the space between nearly parallel platelets of YBCO. Large Y2BaCuO5 particles at the solidification front appeared divided into smaller ones as a result of their dissolution in the liquid that quenched as BaCu2O2.

引用

页码：624 / 635

页数：12

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