Effects of Nd123/MgO thin film and MgO single-crystal seeds in isothermal solidification of YBaCuO/Ag

被引：20
作者：
Cai, CB [1 ]
Fujimoto, H [1 ]
机构：
[1] Railway Tech Res Inst, Kokubunji, Tokyo 1858540, Japan
来源：
JOURNAL OF MATERIALS RESEARCH | 2000年 / 15卷 / 08期
关键词：
D O I：
10.1557/JMR.2000.0251
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The seeding effects of (001) Nd123/MgO thin films and MgO single crystals were studied in isothermal solidification of YBa2Cu3Oy composite with the additions of 40 mol% Y2BaCuO5, 10 wt% Ag, and 0.5 wt% Pt. Seeding with the Nd123/MgO thin film resulted in single-domain growth of Y123 crystal with a stable growth along the [100] direction, while seeding with MgO single crystal produced multidomain growth in which the dominant growth facet is rotated 45 degrees about (100) plane of MgO. Multidomain growth in MgO seeded sample was suppressed by decreasing undercooling degree. The effects of undercooling degree and seed size on multidomain growth are discussed in view of classical nucleation and growth theory.
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页码：1742 / 1748
页数：7
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