FORMATION AND GROWTH MECHANISMS OF BI2SR2CACU2OY ON AN AG SUBSTRATE IN THE PARTIAL MELTING METHOD

被引：15

作者：

HASEGAWA, T ^{[1
]}

KOBAYASHI, H ^{[1
]}

KUMAKURA, H ^{[1
]}

TOGANO, K ^{[1
]}

机构：

[1] NATL RES INST MET,TSUKUBA,IBARAKI 305,JAPAN

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 1994年 / 7卷 / 08期

关键词：

D O I：

10.1088/0953-2048/7/8/008

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We investigated the phase changes of a Bi-Sr-Ca-Cu-O/Ag composite tape during cooling from a partially molten state using the high-temperature-x-ray-diffraction and oil-quenching techniques. In the cooling process, (SrCa)CuO2 and Bi(SrCa)2Oy appeared at the areas where the (SrCa)2CuO3 phase disappeared. At around 860-degrees-C, these solid phases melted into the liquid phase, and then Bi2Sr2CaCu2Oy (Bi-2212) grew rapidly at the surface. First, nucleation of Bi-2212 occurred at the surface of the liquid phase. With decreasing temperature the Bi-2212 crystal growth proceeded slowly from the surface to the inner area with the a-b plane almost parallel to the surface. During the growth of Bi-2212, excess Bi was ejected from Bi-2212, and a thin Bi-enriched layer was formed at the growth front of Bi-2212.

引用

页码：579 / 582

页数：4

共 9 条

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