The effect of alumina doping on the superplastic characteristics of 3 Y-TZP

被引：4

作者：

Sasaki, K ^{[1
]}

Shimura, K ^{[1
]}

Mimurada, J ^{[1
]}

Ikuhara, Y ^{[1
]}

Sakuma, T ^{[1
]}

机构：

[1] Univ Tokyo, Fac Engn, Dept Mat Sci, Bunkyo Ku, Tokyo 113, Japan

来源：

CREEP AND FRACTURE OF ENGINEERING MATERIALS AND STRUCTURES | 2000年 / 171-1卷

关键词：

superplasticity; zirconia; grain boundary; segregation;

D O I：

10.4028/www.scientific.net/KEM.171-174.377

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：

In order to determine the influence of alumina on the superplasticity of yttria stabilized zirconia (YSZ) in the solubility limit of zirconia, 0.4 mol% alumina was doped to 3 mol% yttria stabilized zirconia powders. Improvements for both superplastic flow and elongation to failure were obtained when compared to the undoped samples. TEM analysis, using HREM combined with EDS were carried out on the grain boundary, where no secondary phases were observed at grain boundary triple junctions and on the grain boundary. However both aluminium and yttrium ions were detected at the grain boundary, indicating the segregation of the solute ions over a width of about 6 nm. Aluminium ions were found to segregate to a certain extent to the grain boundary with the rest dissociating in the zirconia matrix.

引用

页码：377 / 382

页数：6

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