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Effect of Reinforcement Volume Fraction on the Mechanical Properties of Al--SiC Nanocomposites Produced by Mechanical Alloying and Consolidation

Kamrani, S. and Riedel, R. and Seyed Reihani, S. M. and Kleebe, H.-J. (2010):
Effect of Reinforcement Volume Fraction on the Mechanical Properties of Al--SiC Nanocomposites Produced by Mechanical Alloying and Consolidation.
In: Journal of Composite Materials, 44 (3), SAGE, pp. 313-326, ISSN 0021-9983,
[Online-Edition: http://dx.doi.org/10.1177/0021998309347570],
[Article]

Abstract

Al�(1, 3, 5, 7, 10 vol%) SiC nanocomposites were produced by mechanical alloying (MA) and double pressing/sintering route. The characteristics of the milled powders and the consolidate specimens were examined using high resolution scanning electron microscopy and X-ray diffraction method. Compression and hardness tests were used to study the effect of SiC volume fraction on the strength of Al�SiC nanocomposites. It was shown that with increasing the SiC volume fraction, finer particles with narrower size distribution and smaller crystallite size are obtained after MA. During sintering close to the melting point of aluminum, the presence of nanometer-scaled SiC particles was found to hinder the grain growth significantly. The Al matrix with a higher SiC content exhibited more potential for grain boundary pinning, i.e., smaller grain size was obtained at higher SiC volume fractions. Consequently, an improved mechanical strength was obtained. The processing method (MA/pressing/sintering) can be used for fabrication of near-net shape Al matrix nanocomposites.

Item Type: Article
Erschienen: 2010
Creators: Kamrani, S. and Riedel, R. and Seyed Reihani, S. M. and Kleebe, H.-J.
Title: Effect of Reinforcement Volume Fraction on the Mechanical Properties of Al--SiC Nanocomposites Produced by Mechanical Alloying and Consolidation
Language: English
Abstract:

Al�(1, 3, 5, 7, 10 vol%) SiC nanocomposites were produced by mechanical alloying (MA) and double pressing/sintering route. The characteristics of the milled powders and the consolidate specimens were examined using high resolution scanning electron microscopy and X-ray diffraction method. Compression and hardness tests were used to study the effect of SiC volume fraction on the strength of Al�SiC nanocomposites. It was shown that with increasing the SiC volume fraction, finer particles with narrower size distribution and smaller crystallite size are obtained after MA. During sintering close to the melting point of aluminum, the presence of nanometer-scaled SiC particles was found to hinder the grain growth significantly. The Al matrix with a higher SiC content exhibited more potential for grain boundary pinning, i.e., smaller grain size was obtained at higher SiC volume fractions. Consequently, an improved mechanical strength was obtained. The processing method (MA/pressing/sintering) can be used for fabrication of near-net shape Al matrix nanocomposites.

Journal or Publication Title: Journal of Composite Materials
Volume: 44
Number: 3
Publisher: SAGE
Uncontrolled Keywords: nanocomposite, Al�SiC, mechanical alloying, mechanical properties, grain growth
Divisions: 11 Department of Materials and Earth Sciences > Earth Science > Geo-Material-Science
11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
11 Department of Materials and Earth Sciences > Earth Science
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 05 Apr 2012 11:43
Official URL: http://dx.doi.org/10.1177/0021998309347570
Identification Number: doi:10.1177/0021998309347570
Funders: Financial support by New Industries Center, Iranian Ministry of Mines and Metals
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