Solid State Science and Technology, Vol. 16, No 1 (2008) 168-174
Corresponding Author: firstname.lastname@example.org
THE EFFECT OF CERIUM ADDITION ON THE MICROSTRUCTURE OF AlSiMgCe ALLOY
Anasyida Abu Seman and Abdul Razak Daud.
School of Applied Physics, Faculty of Science and Technology,
University Kebangsaan Malaysia, 43600 Bangi, Selangor.
In this study the effect of cerium addition on the microstructure and microhardness of
Al-12.5Si-4Mg alloy was investigated. Experiments have been conducted on Al
12.5Si4Mg alloys with cerium content in the alloy was varied from 0.5 to 3wt%. The
alloys were produced by casting in a permanent mould. Optical microscopy, scanning
electron microscopy and energy dispersive X-Ray spectroscopy, X-ray diffractometry
and Vickers microhardness were used in this investigation. The results show that the
addition of 0.5 to 3.0wt% of cerium led to the formation of precipitation of Al4Ce phase
in the Al-matrix. The microhardness of as cast alloy increases with the increase in
cerium content as a result of the precipitation. Heat treatment at 200ΊC led to the
increase in microhardness of as cast alloys due clustering of Si and precipitation of fine
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