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Magnesium Matrix Nano-Composite Fabricated by Ultrasonic Dispersion of Nano-Sized SiC Particles in Molten Magnesium Alloy

[+] Author Affiliations
Jie Lan, Xiaochun Li

University of Wisconsin at Madison

Paper No. IMECE2004-61408, pp. 411-414; 4 pages
doi:10.1115/IMECE2004-61408
From:
  • ASME 2004 International Mechanical Engineering Congress and Exposition
  • Aerospace
  • Anaheim, California, USA, November 13 – 19, 2004
  • Conference Sponsors: Aerospace Division
  • ISBN: 0-7918-4700-4 | eISBN: 0-7918-4178-2, 0-7918-4179-0, 0-7918-4180-4
  • Copyright © 2004 by ASME

abstract

The use of ultrasonic nonlinear effects to disperse nano-sized ceramic particles in molten metal has been studied and nanosized SiC particle reinforced AZ91D magnesium composites were fabricated. The microstructure of the composites was investigated by high resolution scanning electron microscopy (SEM), X-ray photo spectroscopy (XPS) and high resolution X-Ray Diffractometer(XRD) techniques. Experimental results show a nearly uniform distribution and good dispersion of the SiC nanoparticles within the magnesium matrix, although some of small agglomerates (less than 300nm) were found in matrix. The microhardness of composites have been improved significantly compared to that of pure AZ91D. The ultrasonic fabrication methodology is striking to rapidly produce a wide range of nano-sized particles reinforced metal matrix composites.

Copyright © 2004 by ASME

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