Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 32, Issue 14, Pages 3667-3674Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2012.02.033
Keywords
Sintering; Thermal conductivity; Electrical conductivity; ZrO2; SPS
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Funding
- Office of Naval Research (ONR) [N00014-10-1-0632]
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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.
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