PREPARATION OF SPHERICAL-PARTICLES OF BA2YCU3O7-X SUPERCONDUCTOR BY PLASMA SPRAYING

被引：5

作者：

HIBINO, A

WATANABE, R

机构：

[1] Department of Materials Processing, Faculty of Engineering, Tohoku University, Sendai

来源：

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS | 1990年 / 1卷 / 01期

关键词：

D O I：

10.1007/BF00716009

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Ground angular powder of pre-synthesized Ba2YCu3O7-x was introduced into a high-temperature plasma jet flame with argon as the plasma gas. Morphological changes in the particles and in microstructural features, as well as phase changes, were observed on the plasma-sprayed powder. Spherical particles with various surface topographies were formed: smooth surface with fine grain structure; spiky surface; and polygonal surface structure. X-ray phase analysis showed that the plasma-sprayed powder was a mixture of solidified crystalline and amorphous phases from the liquid state, while the metallic composition of the starting powder was retained. The plasma-sprayed particles were subsequently annealed for 20 to 80 h in air at temperatures up to 1123 K. The superconductor phase was recovered by this heat treatment, while the particles became porous with morphological changes in surface topography. © 1990 Chapman and Hall Ltd.

引用

页码：13 / 17

页数：5