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Improvement of CNFs/SiC nanocomposite properties obtained from different routes and consolidated by pulsed electric-current pressure sintering

Garcia Rocha, Victoria, Borrell, Amparo, Torrecillas, Ramón and Fernández, Adolfo 2012. Improvement of CNFs/SiC nanocomposite properties obtained from different routes and consolidated by pulsed electric-current pressure sintering. Materials Science and Engineering: A 556 , pp. 414-419. 10.1016/j.msea.2012.07.006

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Abstract

The influence of the preparation route and composition on carbon nanofibers–silicon carbide (CNFs/SiC) nanocomposites' properties was studied. Nanopowders were mixed by ultrasonic dispersion or high attrition milling and the consolidation was done by pulsed electric-current pressure sintering technique. The relative density and fracture strength of high-energy attrition milled CNFs/SiC nanocomposites gradually increased with the increase of sintering temperature, from 1400 to 1800 °C and holding time 1 to 30 min. A chemical surface coating of CNFs with alumina precursor is proposed as a very effective way for improving the interaction between CNFs and SiC. An increase of 54% in fracture strength was achieved on the nanocomposites when the surface coating was used. As a consequence of the stronger interaction between the components, which is achieved through the use of suitable processing route and sintering parameters, and the role of nano-alumina as sintering aid improved mechanical properties was achieved.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Uncontrolled Keywords: Mechanical characterization; Ceramics; Nanostructured materials; Grain refinement; Pulsed electric-current pressure sintering
Publisher: Elsevier
ISSN: 0921-5093
Date of Acceptance: 2 July 2012
Last Modified: 04 Jun 2017 09:19
URI: http://orca.cf.ac.uk/id/eprint/93345

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