0
Special Section: Micromanufacturing

Mechanical Properties and Microstructure of MgSiC Nanocomposites Fabricated by Ultrasonic Cavitation Based Nanomanufacturing

[+] Author and Article Information
Guoping Cao, Hiromi Konishi

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

Xiaochun Li

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

J. Manuf. Sci. Eng 130(3), 031105 (May 05, 2008) (6 pages) doi:10.1115/1.2823086 History: Received June 12, 2007; Revised November 04, 2007; Published May 05, 2008

Magnesium, the lightest structural metal, is of significance to improve energy efficiency in various applications. MgSiC nanocomposites were successfully fabricated by ultrasonic cavitation based dispersion of SiC nanoparticles in Mg melts. As compared to pure magnesium, the mechanical properties including tensile strength and yield strength of the MgSiC nanocomposites were improved significantly, while the good ductility of pure Mg was retained. The grain size of the pure magnesium was refined significantly when SiC nanoparticles were dispersed in the Mg matrix. In the microstructure of MgSiC nanocomposites, while there were still some SiC microclusters, most of the SiC nanoparticles were dispersed very well. Transmission electron microscopy study of the interface between SiC nanoparticles and magnesium matrix indicates that SiC nanoparticles bond well with Mg without forming an intermediate phase.

FIGURES IN THIS ARTICLE
<>
Copyright © 2008 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Experimental setup for fabricating Mg–SiC nanocomposites

Grahic Jump Location
Figure 2

Permanent mold casting Mg samples for tensile testing

Grahic Jump Location
Figure 3

Typical stress-strain curves of as-cast pure Mg and Mg∕SiC nanocomposites

Grahic Jump Location
Figure 4

Optical images of pure Mg and Mg/2% SiC nanocomposites showing grain refining effects of SiC nanoparticles: (a) pure Mg and (b) Mg/2% SiC nanocomposites

Grahic Jump Location
Figure 5

Fracture surface of pure Mg and Mg/2% SiC nanocomposites (a) pure Mg and (b) Mg/2% SiC nanocomposites

Grahic Jump Location
Figure 6

Optical images of SiC microclusters: (a) Mg/0.5% SiC, (b) Mg/2% SiC, and (c) Mg/4% SiC

Grahic Jump Location
Figure 7

SEM images of Mg/2% SiC nanocomposite: (a) lower magnification and (b) higher magnification of an area without big SiC clusters, which showed a good dispersion of SiC nanoparticles in Mg

Grahic Jump Location
Figure 8

EDS of Mg/2% SiC nanocomposites: (a) SiC cluster area and (b) Mg matrix

Grahic Jump Location
Figure 9

TEM images of Mg/2% SiC nanocomposite: (a) low magnification TEM image of SiC nanoparticles in a microcluster of Mg/2% SiC nanocomposite (asterisks indicate SiC nanoparticles), (b) low magnification TEM image of SiC nanoparticles in a microcluster of Mg/4% SiC nanocomposite, (c) ED of Mg/2% SiC nanocomposite, and (d) high resolution TEM image of the interface between a SiC nanoparticle (bottom) and Mg matrix (top)

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In