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Al-Si alloys are mostly used in casting industry for automotive parts. In this alloy, silicon need to be
modified to obtain fine fibrous particles instead of coarse needles. Strontium master alloys have been used as
modifier in Al-Si alloys for decades [1,2]. The modification was first discovered in 1921 by Aladar Pacz and his
unique method was patented. In the Pacz study, it has been shown that Al-Si alloys with Si content of 5-15% are
modified with alkali fluoride, preferably sodium fluoride fluxes. Closset and Gruzleski, have shown that strontium
can be used as a modifier in silicon-containing alloys [1].
International Symposium on Light Alloys and Composite Materials
UHAKS
Ibrahim Goksel Hizli
Rasit Sezer
Özen Gürsoy2
Selim Ertürk
Cüneyt Arslan
Derya Dışpınar