MECHANISM FOR THE PERITECTIC REACTION AND GROWTH OF ALIGNED GRAINS IN YBA2CU3O6+X

被引：73

作者：

BATEMAN, CA ^{[1
]}

ZHANG, LJ ^{[1
]}

CHAN, HM ^{[1
]}

HARMER, MP ^{[1
]}

机构：

[1] LEHIGH UNIV,MAT RES CTR,BETHLEHEM,PA 18015

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1992年 / 75卷 / 05期

关键词：

YTTRIUM BARIUM COPPER OXIDE (YBCO); PERITECTIC; REACTIONS; GRAIN GROWTH; MECHANISM;

D O I：

10.1111/j.1151-2916.1992.tb05572.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

It is experimentally observed that the peritectic reaction, 211 + liquid --> 123, can be driven essentially to completion in 1 h at an undercooling of only almost-equal-to 30-degrees-C. The kinetic data, together with the observed microstructures, are inconsistent with the normal mechanism of the peritectic reaction. It is proposed that the mechanism of the reaction involves dissolution of 211 particles into the liquid and precipitation of solid 123. The aligned grain structure is explained through sympathetic nucleation of new 123 grains on existing grains.

引用

页码：1281 / 1283

页数：3

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