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Flash sintering of ceramic materials
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Dancer, Claire E. J. (2016) Flash sintering of ceramic materials. Materials Research Express, 3 (10). 102001. doi:10.1088/2053-1591/3/10/102001 ISSN 2053-1591.
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WRAP_1271916-wmg-221216-c_dancer_flash_sintering_review_mrx_for_wrap.pdf - Accepted Version - Requires a PDF viewer. Download (1309Kb) |
Official URL: http://dx.doi.org/10.1088/2053-1591/3/10/102001
Abstract
During flash sintering, ceramic materials can sinter to high density in a matter of seconds while subjected to electric field and elevated temperature. This process, which occurs at lower furnace temperatures and in shorter times than both conventional ceramic sintering and field-assisted methods such as spark plasma sintering, has the potential to radically reduce the power consumption required for the densification of ceramic materials. This paper reviews the experimental work on flash sintering methods carried out to date, and compares the properties of the materials obtained to those produced by conventional sintering. The flash sintering process is described for oxides of zirconium, yttrium, aluminium, tin, zinc, and titanium; silicon and boron carbide, zirconium diboride, materials for solid oxide fuel applications, ferroelectric materials, and composite materials. While experimental observations have been made on a wide range of materials, understanding of the underlying mechanisms responsible for the onset and latter stages of flash sintering is still elusive. Elements of the proposed theories to explain the observed behaviour include extensive Joule heating throughout the material causing thermal runaway, arrested by the current limitation in the power supply, and the formation of defect avalanches which rapidly and dramatically increase the sample conductivity. Undoubtedly, the flash sintering process is affected by the electric field strength, furnace temperature and current density limit, but also by microstructural features such as the presence of second phase particles or dopants and the particle size in the starting material. While further experimental work and modelling is still required to attain a full understanding capable of predicting the success of the flash sintering process in different materials, the technique non-etheless holds great potential for exceptional control of the ceramic sintering process.
Item Type: | Journal Article | ||||||||
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Subjects: | T Technology > TN Mining engineering. Metallurgy | ||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||||
Library of Congress Subject Headings (LCSH): | Sintering, Ceramic materials | ||||||||
Journal or Publication Title: | Materials Research Express | ||||||||
Publisher: | Institute of Physics Publishing Ltd. | ||||||||
ISSN: | 2053-1591 | ||||||||
Official Date: | 10 October 2016 | ||||||||
Dates: |
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Volume: | 3 | ||||||||
Number: | 10 | ||||||||
Article Number: | 102001 | ||||||||
DOI: | 10.1088/2053-1591/3/10/102001 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Date of first compliant deposit: | 3 January 2017 | ||||||||
Date of first compliant Open Access: | 10 October 2017 |
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