Figure 1. A cluster of nano-sized SiC particles.


Figure 2. A SEM image of individual nanoparticles in a solidified specimen.


(a)


(b)


Figure 3. (a) Grain size of control group; (b) Grain size of casting subjected to high intensity ultrasonic vibration during solidification.


REFERENCE


1. Liu. Y., Liu. X., and Bian. X ., Grain Refinement of Mg-Al Alloys with Al4


Materials Letters, 58 (7-8) (2004), 1282-1287. C3


2. StJohn, D. H., Ma, Q., Easton, M.A., Cao, P. and Hildebrand, Z., Grain Refinement of Magnesium Alloys, Metall. Mat. Trans, 36 (A) (2005), 1669-1679.


-SiC/Al Master Alloys,


3. Jian. X., Xu. H., Meek.T. and Han. Q., Effect of Power Ultrasound on Solidification of A356 Alloy, Materials Letters, 59 (2-3) (2005), 190.


4. Jian, X., Meek, T. and Han, Q., Refinement of Eutectic Silicon Phase of Aluminum A356 Alloy Using High- Intensity Ultrasonic Vibration, Scripta Materialia, 54 (5) (2006), 893-896.


International Journal of Metalcasting/Winter 10


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