On the Arrhenius-like behavior of conductivity during flash sintering of 3 mol% yttria stabilized zirconia ceramics

被引：19

作者：

V. Campos, Joao ^{[1
,2
,3
]}

Lavagnini, Isabela R. ^{[1
,2
,3
]}

Avila, Viviana ^{[3
]}

Yoon, Bola ^{[3
]}

Ghose, Sanjit ^{[4
]}

Raj, Rishi ^{[3
]}

Pallone, Eliria M. J. A. ^{[1
,2
]}

Jesus, Lilian M. ^{[3
,5
]}

机构：

[1] Univ Sao Paulo, USP, Dept Biosyst Engn, Av Duque Caxias Norte 225, BR-13635900 Pirassununga, SP, Brazil

[2] Univ Sao Paulo, USP, FZEA, Postgrad Programme Mat Sci & Engn, Av Duque Caxias Norte 225, BR-13635900 Pirassununga, Brazil

[3] Univ Colorado, Dept Mech Engn, Boulder, CO 80309 USA

[4] Brookhaven Natl Lab, Energy Sci Directorate, Photon Sci Div, NSLS II, Upton, NY 11973 USA

[5] Univ Fed Sao Carlos UFSCAR, Dept Phys, Grp Adv Funct Mat MAFA, BR-13565905 Sao Carlos, SP, Brazil

来源：

SCRIPTA MATERIALIA | 2021年 / 203卷

基金：

巴西圣保罗研究基金会; 瑞典研究理事会;

关键词：

Zirconia; Electric field-assisted sintering; Synchrotron; X-ray diffraction; IONIC-CONDUCTIVITY; DIELECTRIC-PROPERTIES; NANOGRAIN ZIRCONIA; TEMPERATURE; TRANSLUCENT; INCUBATION; ONSET; FIELD;

D O I：

10.1016/j.scriptamat.2021.114093

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We discuss the Arrhenius behavior of electrical conductivity sigma during flash sintering of 3 mol% yttria stabilized zirconia (3YSZ). In situ x-ray diffraction is used to determine sample temperature. Sintering contribution to sigma is excluded by investigating the flash event on a dense ceramic. We show that total conductivity follows an Arrhenius-like equation in both dense and green samples, even during Stage II of flash. The non-linearity often verified during flash sintering of 3YSZ is therefore related to the furnace temperature instead of the sample temperature when building the ln(sigma) vs. 1/T plots. Furthermore, we verified a change in the activation energy for conduction prior to the ignition of the flash event and discussed the possible mechanisms. For instance, the decrease in activation energy from Stage I to II in the dense sample is attributed to a contribution from electronic carriers. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页数：5

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