MICROSTRUCTURES OF THE MELT-POWDER-MELT-GROWTH PROCESSED YBACUO

被引：72

作者：

YAMAGUCHI, K

MURAKAMI, M

FUJIMOTO, H

GOTOH, S

OYAMA, T

SHIOHARA, Y

KOSHIZUKA, N

TANAKA, S

机构：

[1] Superconductivity Research Laboratory, International Superconductivity Technology Center, Shinonome, Koto-ku, Tokyo, 135

来源：

JOURNAL OF MATERIALS RESEARCH | 1991年 / 6卷 / 07期

关键词：

D O I：

10.1557/JMR.1991.1404

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Microstructures of two MPMG processed YBaCuO materials with and without Y2BaCuO5 (211) inclusions were investigated by transmission electron microscopy. Using the MPMG process, it is possible to change the quantity of the 211 inclusions in the YBa2Cu3O7 (123) matrix. We prepared two YBaCuO samples with 0 and 30 vol. % 211 and with respective critical current density values of 2000 and 30 000 A/cm2 at 77 K and 1 T (magnetic field parallel to the c-axis). As possible pinning centers, we found stacking faults in the 123 matrix. However, we observed no appreciable change in their number and structure by introducing the 211 inclusions. Therefore, the difference in J(c) values can be attributed to the 211 inclusion itself.

引用

页码：1404 / 1407

页数：4

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