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Research Letters in Materials Science
Volume 2008 (2008), Article ID 835746, 4 pages
http://dx.doi.org/10.1155/2008/835746
Research Letter

Influence of Nanosized Silicon Carbide on Dimensional Stability of Al/SiC Nanocomposite

1Department of Materials Science and Metallurgical Engineering, Engineering Faculty, Ferdowsi University of Mashhad, P.O. Box 91775-1111, Mashhad 91779-48974, Iran
2Center for Nanotechnology, Ferdowsi University of Mashhad, P.O. Box 91775-1111, Mashhad 91779-48974, Iran

Received 12 November 2007; Accepted 7 January 2008

Academic Editor: Jack Gillespie

Copyright © 2008 S. M. Zebarjad et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This study concentrated on the role of particle size of silicon carbide (SiC) on dimensional stability of aluminum. Three kinds of Al/SiC composite reinforced with different SiC particle sizes (25  𝜇 m, 5  𝜇 m, and 70 nm) were produced using a high-energy ball mill. The standard samples were fabricated using powder metallurgy method. The samples were heated from room temperature up to 500C in a dilatometer at different heating rates, that is, 10, 30, 40, and 60C/min. The results showed that for all materials, there was an increase in length change as temperature increased and the temperature sensitivity of aluminum decreased in the presence of both micro- and nanosized silicon carbide. At the same condition, dimensional stability of Al/SiC nanocomposite was better than conventional Al/SiC composites.