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Mechanosynthesis of metal-silica nanocomposites

Corrias, A., Ennas, G., Paschina, G., Piccaluga, G., Zedda, D. (1995) Mechanosynthesis of metal-silica nanocomposites. Materials Science Forum, 195 . pp. 25-30. ISSN 0255-5476. (doi:10.4028/www.scientific.net/MSF.195.25) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
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http://dx.doi.org/10.4028/www.scientific.net/MSF.1...

Abstract

A mechanochemistry route has been experimented to synthesise metal-silica nanocomposites with different volume fractions of nickel or iron through oxygen transfer reactions from the corresponding metal oxides to silicon. In nickel containing samples, oxygen transfer occurs in a direct way and Si can be completely transformed into silica, while the stoichiometric quantity of NiO is reduced to Ni(0) nanometer crystallites. When NiO is present in a larger content, the excess, present at the end of the milling process, is reduced by a thermal treatment in H2 flux. This does not produce a significant growth of the nanocrystallites. Similar process conditions applied to Fe containing samples give rise to a more complex reaction path which prevents the complete conversion of Fe(III) to Fe(0).

Item Type: Article
DOI/Identification number: 10.4028/www.scientific.net/MSF.195.25
Uncontrolled keywords: Heat flux, Heat treatment, Iron, Mechanical alloying, Metallic matrix composites, Nickel, Stoichiometry, Synthesis (chemical), Volume fraction, Mechanosynthesis, Metal silica nanocomposites, Oxygen transfer reactions, Nanostructured materials
Subjects: Q Science > QC Physics > QC176.8.N35 Nanoscience, nanotechnology
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Anna Corrias
Date Deposited: 17 Dec 2014 12:20 UTC
Last Modified: 29 May 2019 13:57 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/46238 (The current URI for this page, for reference purposes)
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