Ultrasonic Cavitation Based Nanomanufacturing of Bulk Aluminum Matrix Nanocomposites

[+] Author and Article Information
Yong Yang

Department of Mechanical Engineering,  University of Wisconsin-Madison, 1513 University Avenue, Madison WI 53706

Xiaochun Li1

Department of Mechanical Engineering,  University of Wisconsin-Madison, 1513 University Avenue, Madison WI 53706xcli@cae.wisc.edu


Corresponding author.

J. Manuf. Sci. Eng 129(3), 497-501 (Feb 05, 2006) (5 pages) doi:10.1115/1.2714583 History: Received September 27, 2005; Revised February 05, 2006

Lightweight metal–matrix nanocomposites (MMNCs) (metal matrix with nanosized ceramic particles) can be of significance for automobile, aerospace, and numerous other applications. It would be advantageous to develop effective nanomanufacturing methods for fabrication of bulk components of aluminum based MMNCs through solidification processing. However, it is extremely difficult to disperse nanosized ceramic particles uniformly in molten aluminum. In this paper, a high power ultrasonic probe is used to disperse nanosized SiC particles into molten aluminum alloy A356. Experimental results show that the ultrasonic cavitation based dispersion of nanoparticles in molten aluminum alloy is effective. The uniform nanoparticle dispersion in the Al alloy matrix resulted in significantly improved mechanical properties. To enhance the nanomanufacturing efficiency, various nanoparticle feeding techniques were explored and experimental results are presented.

Copyright © 2007 by American Society of Mechanical Engineers
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Figure 1

Schematic of experimental nanomanufacturing setup

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Figure 2

SEM images of Al matrix and nanocomposite

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Figure 3

Spot EDS spectrum of the nanocomposite with 2wt%SiC

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Figure 4

Bright-field TEM image of nanocomposites

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Figure 5

Tensile test results of nanocomposites

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Figure 6

Flow chart for master powder preparation

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Figure 7

SEM and EDS analysis of master powders with 10wt%SiC

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Figure 8

Optical images of composites fabricated with loose master powers




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