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Sintering and densification of nanocrystalline ceramic oxide powders: a review

Chaim, Rachman and Levin, M. and Shlayer, Amit and Estournès, Claude Sintering and densification of nanocrystalline ceramic oxide powders: a review. (2008) Advances in Applied Ceramics: Structural, Functional and Bioceramics Journal - Advances in Psychiatric Treatment, vol. 107 (n° 3). pp. 159-169. ISSN 1743-6753

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Official URL: http://dx.doi.org/10.1179/174367508X297812

Abstract

Observation of the unconventional properties and material behaviour expected in the nanometre grain size range necessitates the fabrication of fully dense bulk nanostructured ceramics. This is achieved by the application of ceramic nanoparticles and suitable densification conditions, both for the green and sintered compacts. Various sintering and densification strategies were adopted, including pressureless sintering, hot pressing, hot isostatic pressing, microwave sintering, sinter forging, and spark plasma sintering. The theoretical aspects and characteristics of these processing techniques, in conjunction with densification mechanisms in the nanocrystalline oxides, were discussed. Spherical nanoparticles with narrow size distribution are crucial to obtain homogeneous density and low pore-to-particle-size ratio in the green compacts, and to preserve the nanograin size at full densification. High applied pressure is beneficial via the densification mechanisms of nanoparticle rearrangement and sliding, plastic deformation, and pore shrinkage. Low temperature mass transport by surface diffusion during the spark plasma sintering of nanoparticles can lead to rapid densification kinetics with negligible grain growth.

Item Type:Article
Additional Information:Thanks to Maney Publishing editor. The definitive version is available at http://www.ingentaconnect.com The original PDF of the article can be found at Advances in Applied Ceramics: Structural, Functional and Bioceramics Journal - Advances in Psychiatric Treatment website : http://maney.co.uk/index.php/journals/aac/
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Other partners > Technion – Israel Institute of Technology (ISRAEL)
French research institutions > Centre National de la Recherche Scientifique - CNRS
Laboratory name:
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Deposited By: Celine Cabaup

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