Grain size and temperature dependence of the threshold stress for superplastic deformation in yttria-stabilized zirconia polycrystals

被引：36

作者：

Dominguez-Rodriguez, A

Bravo-Leon, A

Ye, JD

Jimenez-Melendo, M

机构：

[1] Univ Sevilla, Dept Fis Mat Condensada, E-41080 Seville, Spain

[2] S China Univ Technol, Dept Inorgan Mat, Canton 510641, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1998年 / 247卷 / 1-2期

关键词：

superplasticity; Y-TZP; threshold stress; activation energy;

D O I：

10.1016/S0921-5093(97)00837-X

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The influence of the threshold stress on the value of the activation energy (Q) and stress exponent (n) measured during creep tests in fine-grained Y2O3-doped ZrO2 polycrystals has been investigated in tie low-stress region at intermediate temperatures. A significant increase of the measured value of Q and n with decreasing stress has been observed, consistent with the existence of a threshold stress for superplastic deformation. (C) 1998 Elsevier Science S.A. All rights reserved.

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收藏

页码：97 / 101

页数：5

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