Asymmetric temperature distribution during steady stage of flash sintering dense zirconia

被引：61

作者：

Liu, Guangxin ^{[1
,2
]}

Liu, Dianguang ^{[3
]}

Liu, Jinling ^{[1
,2
]}

Gao, Yan ^{[1
,2
]}

Wang, Yiguang ^{[4
]}

机构：

[1] Southwest Jiaotong Univ, Sch Mech & Engn, State Key Lab Tract Power, Chengdu 610031, Sichuan, Peoples R China

[2] Southwest Jiaotong Univ, Appl Mech & Struct Safety Key Lab Sichuan Prov, Chengdu 610031, Sichuan, Peoples R China

[3] Southwest Jiaotong Univ, Sch Mat Sci & Engn, Chengdu 610031, Sichuan, Peoples R China

[4] Northwestern Polytech Univ, Sci & Technol Thermostruct Composite Mat Lab, Xian 710072, Shaanxi, Peoples R China

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2018年 / 38卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Flash-sintering; Joule heating; Asymmetric temperature distribution; Electrochemical reaction; YTTRIA-STABILIZED ZIRCONIA; NANOGRAIN ZIRCONIA; FIELD;

D O I：

10.1016/j.jeurceramsoc.2018.02.012

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：

Surface temperature of zirconia is measured during flash sintering using thermal imaging camera. The results reveal that in the steady stage the temperature along the longitude of electric field is uneven: the temperature at the end of gauge section close to the anode is much higher than that close to the cathode; and the highest temperature locates at the three-quarter of the length of gauge section from the cathode. We further demonstrate that the asymmetric temperature distribution is related to the flashing since temperature distribution in the specimen without flashing is symmetric. The possible mechanisms that resulted in the asymmetric distribution are discussed.

引用

页码：2893 / 2896

页数：4

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