Improved densification and ionic conductivity in flash-sintered gamma-ray irradiated yttria-stabilized zirconia

被引：1
|
作者：
Muccillo, R. [1 ,2 ]
Muccillo, E. N. S. [1 ]
机构：
[1] Energy & Nucl Res Inst, Ctr Sci & Technol Mat, BR-05508170 Sao Paulo, SP, Brazil
[2] Fed Univ ABC, BR-09210580 Santo Andre, SP, Brazil
来源：
SCRIPTA MATERIALIA | 2019年 / 170卷
基金：
巴西圣保罗研究基金会;
关键词：
Flash sintering; Gamma irradiation; Zirconia; Ionic conductivity; RADIATION;
D O I：
10.1016/j.scriptamat.2019.06.004
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Experiments on electric field-assisted pressureless sintering were conducted, with a dilatometer connected to a power supply, in zirconia: 8 mol% yttria polycrystalline ceramics exposed to gamma radiation. During heating to 1000 degrees C, an electric field of 150 V cm(-1) was applied at room temperature up to a sharp thickness shrinkage occurred (flash sintering). It was found that the higher the imparted gamma radiation dose the higher the shrinkage. The shrinkage enhancement and the increase of the total ionic conductivity, when compared to non-irradiated sample, were probably due to the increase of oxygen vacancy concentration after exposure to gamma radiation. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：120 / 123
页数：4
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