Journal
SCRIPTA MATERIALIA
Volume 146, Issue -, Pages 260-266Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2017.12.006
Keywords
Sintering; Flash sintering; Water-assisted flash sintering; Two-step flash sintering; Field-assisted sintering
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Funding
- Aerospace Materials for Extreme Environments program of the U.S. Air Force Office of Scientific Research (AFOSR) [FA9550-14-1-0174]
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This viewpoint article critically assesses several scientific and technological questions regarding flash sintering: (1) How does a flash start? (2) What are the possible mechanisms of rapid densifications? (3) What are the electric field/current/potential effects? (4) Can we drastically reduce the flash temperature (or even start a flash at room temperature)? (5) Can we control the microstructures (e.g., fabricate dense nanomystalline ceramics) by manipulating the electric field/current profile? ZnO is discussed as an examplar but other materials are also critically reviewed. New results of both ZnO and Y2O3-statabilized ZrO2 are presented. Open scientific questions and new technological opportunities are discussed. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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