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Liquid Film Capillary Mechanism for Densification of Ceramic Powders during Flash Sintering
Recently, local melting of the particle surfaces confirmed the formation of spark and plasma during spark plasma sintering, which explains the rapid densification mechanism via liquid. A model for rapid densification of flash sintered ceramics by liquid film capillary was presented, where liquid fil...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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MDPI
2016
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5502973/ https://www.ncbi.nlm.nih.gov/pubmed/28773405 http://dx.doi.org/10.3390/ma9040280 |
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author | Chaim, Rachman |
author_facet | Chaim, Rachman |
author_sort | Chaim, Rachman |
collection | PubMed |
description | Recently, local melting of the particle surfaces confirmed the formation of spark and plasma during spark plasma sintering, which explains the rapid densification mechanism via liquid. A model for rapid densification of flash sintered ceramics by liquid film capillary was presented, where liquid film forms by local melting at the particle contacts, due to Joule heating followed by thermal runaway. Local densification is by particle rearrangement led by spreading of the liquid, due to local attractive capillary forces. Electrowetting may assist this process. The asymmetric nature of the powder compact represents an invasive percolating system. |
format | Online Article Text |
id | pubmed-5502973 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-55029732017-07-28 Liquid Film Capillary Mechanism for Densification of Ceramic Powders during Flash Sintering Chaim, Rachman Materials (Basel) Article Recently, local melting of the particle surfaces confirmed the formation of spark and plasma during spark plasma sintering, which explains the rapid densification mechanism via liquid. A model for rapid densification of flash sintered ceramics by liquid film capillary was presented, where liquid film forms by local melting at the particle contacts, due to Joule heating followed by thermal runaway. Local densification is by particle rearrangement led by spreading of the liquid, due to local attractive capillary forces. Electrowetting may assist this process. The asymmetric nature of the powder compact represents an invasive percolating system. MDPI 2016-04-11 /pmc/articles/PMC5502973/ /pubmed/28773405 http://dx.doi.org/10.3390/ma9040280 Text en © 2016 by the author; Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Chaim, Rachman Liquid Film Capillary Mechanism for Densification of Ceramic Powders during Flash Sintering |
title | Liquid Film Capillary Mechanism for Densification of Ceramic Powders during Flash Sintering |
title_full | Liquid Film Capillary Mechanism for Densification of Ceramic Powders during Flash Sintering |
title_fullStr | Liquid Film Capillary Mechanism for Densification of Ceramic Powders during Flash Sintering |
title_full_unstemmed | Liquid Film Capillary Mechanism for Densification of Ceramic Powders during Flash Sintering |
title_short | Liquid Film Capillary Mechanism for Densification of Ceramic Powders during Flash Sintering |
title_sort | liquid film capillary mechanism for densification of ceramic powders during flash sintering |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5502973/ https://www.ncbi.nlm.nih.gov/pubmed/28773405 http://dx.doi.org/10.3390/ma9040280 |
work_keys_str_mv | AT chaimrachman liquidfilmcapillarymechanismfordensificationofceramicpowdersduringflashsintering |