Effects of local Joule heating during the field assisted sintering of ionic ceramics

被引：70

作者：

Holland, Troy B. ^{[1
]}

Anselmi-Tamburini, Umberto ^{[2
]}

Quach, Dat V. ^{[1
]}

Tran, Tien B. ^{[1
]}

Mukherjee, Amiya K. ^{[1
]}

机构：

[1] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA

[2] Univ Pavia, Dept Phys Chem, I-27100 Pavia, Italy

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2012年 / 32卷 / 14期

关键词：

Sintering; Thermal conductivity; Electrical conductivity; ZrO2; SPS; DC ELECTRIC-FIELD; THERMAL-CONDUCTIVITY; ZIRCONIA; 3Y-TZP; DIFFUSION; DEFORMATION; DEFECT; MODEL; LAYER;

D O I：

10.1016/j.jeurceramsoc.2012.02.033

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：

Recent investigations regarding the role of applied fields on the grain growth and densification behavior of ionic ceramics are providing strong insights into the efficacy of Field Assisted Sintering Technique (FAST), aka Spark Plasma Sintering (SPS). Explanations of the observed behaviors, such as grain growth suppression and densification enhancement, are based upon the conjectured presence of a Joule heating driven temperature differential between grain interfaces and grain cores. These differentials were thought to be responsible for providing increased densification rates and lower densification temperatures through grain growth suppression and/or increased local kinetics at the forming necks. In this paper, we analyze the energetic, thermal, and practical details of this process in the context of the commonly accepted stages of sintering. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：3667 / 3674

页数：8

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