The agglomeration, coalescence and sliding of nanoparticles, leading to the rapid sintering of zirconia nanoceramics

Abstract Conventional sintering is a time- and energy-consuming process used for the densification of consolidated particles facilitated by atomic diffusion at high temperatures. Nanoparticles, with their increased surface free energy, can promote sintering; however, size reduction also promotes agg...

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Autores principales:	Andraž Kocjan, Manca Logar, Zhijian Shen
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f9dc07b263d0430c962dfba2e414b593
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spelling	oai:doaj.org-article:f9dc07b263d0430c962dfba2e414b5932021-12-02T11:41:20ZThe agglomeration, coalescence and sliding of nanoparticles, leading to the rapid sintering of zirconia nanoceramics10.1038/s41598-017-02760-72045-2322https://doaj.org/article/f9dc07b263d0430c962dfba2e414b5932017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02760-7https://doaj.org/toc/2045-2322Abstract Conventional sintering is a time- and energy-consuming process used for the densification of consolidated particles facilitated by atomic diffusion at high temperatures. Nanoparticles, with their increased surface free energy, can promote sintering; however, size reduction also promotes agglomeration, so hampering particle packing and complete densification. Here we show how the ordered agglomeration of zirconia primary crystallites into secondary particle assemblies ensures their homogeneous packing, while also preserving the high surface energy to higher temperatures, increasing the sintering activity. When exposed to intense electromagnetic radiation, providing rapid heating, the assembled crystallites are subjected to further agglomeration, coalescence and sliding, leading to rapid densification in the absence of extensive diffusional processes, cancelling out the grain growth during the initial sintering stages and providing a zirconia nanoceramic in only 2 minutes at 1300 °C.Andraž KocjanManca LogarZhijian ShenNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Andraž Kocjan Manca Logar Zhijian Shen The agglomeration, coalescence and sliding of nanoparticles, leading to the rapid sintering of zirconia nanoceramics
description	Abstract Conventional sintering is a time- and energy-consuming process used for the densification of consolidated particles facilitated by atomic diffusion at high temperatures. Nanoparticles, with their increased surface free energy, can promote sintering; however, size reduction also promotes agglomeration, so hampering particle packing and complete densification. Here we show how the ordered agglomeration of zirconia primary crystallites into secondary particle assemblies ensures their homogeneous packing, while also preserving the high surface energy to higher temperatures, increasing the sintering activity. When exposed to intense electromagnetic radiation, providing rapid heating, the assembled crystallites are subjected to further agglomeration, coalescence and sliding, leading to rapid densification in the absence of extensive diffusional processes, cancelling out the grain growth during the initial sintering stages and providing a zirconia nanoceramic in only 2 minutes at 1300 °C.
format	article
author	Andraž Kocjan Manca Logar Zhijian Shen
author_facet	Andraž Kocjan Manca Logar Zhijian Shen
author_sort	Andraž Kocjan
title	The agglomeration, coalescence and sliding of nanoparticles, leading to the rapid sintering of zirconia nanoceramics
title_short	The agglomeration, coalescence and sliding of nanoparticles, leading to the rapid sintering of zirconia nanoceramics
title_full	The agglomeration, coalescence and sliding of nanoparticles, leading to the rapid sintering of zirconia nanoceramics
title_fullStr	The agglomeration, coalescence and sliding of nanoparticles, leading to the rapid sintering of zirconia nanoceramics
title_full_unstemmed	The agglomeration, coalescence and sliding of nanoparticles, leading to the rapid sintering of zirconia nanoceramics
title_sort	agglomeration, coalescence and sliding of nanoparticles, leading to the rapid sintering of zirconia nanoceramics
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/f9dc07b263d0430c962dfba2e414b593
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The agglomeration, coalescence and sliding of nanoparticles, leading to the rapid sintering of zirconia nanoceramics

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