The production of advanced fine-grained alumina by carbon nanotube addition

Inam, Fawad; Peijs, Ton and Reece, Michael J (2011) The production of advanced fine-grained alumina by carbon nanotube addition.

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Abstract

Alumina and alumina+1vol.% carbon nanotube (CNT) composites were fully densified by spark plasma sintering. Post-sintering heat treatments (1300–1500 ◦C) were performed to completely oxidize CNTs and then densify the remaining 1 vol.% to produce fine-grained ceramics. The grain size and Vickers hardness of the heat-treated composites were compared with the monolithic alumina sintered without CNT addition. Compared to the initial powder particle size of alumina (D50: 356±74 nm), minimal grain growth (∼450 nm) was observed for the fully dense heat-treated composites. A 25% improvement in Vickers hardness and >10 times finer average grain size were observed for alumina produced by the heat treatment (1300 ◦C) of alumina+1vol.% CNT composite, compared to alumina sintered without CNTs.

Item Type: Article
Additional Information: Copyright © 2011 Elsevier Ltd. Published by Elsevier Ltd. All rights reserved. This is the author's final version of the work after peer review. The article was originally published in the Journal of the European Ceramic Society in 2011 by Elsevier. The full published article can be found at http://dx.doi.org/10.1016/j.jeurceramsoc.2011.07.011 on the publisher's website http://www.sciencedirect.com/science/article/pii/S0955221911003451
Keywords: SPS/FAST, Sintering, Grain growth, Grain size, Alumina, Carbon nanotubes, Hardness, Nanocomposite
Members: Glyndŵr University
Depositing User: ULCC Admin
Date Deposited: 15 Sep 2012 00:13
Last Modified: 20 Mar 2016 21:25
URI: http://collections.crest.ac.uk/id/eprint/4500

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