Preparation of al-12si foam using liquid technique

الملخص EN

-Abstract This research aims at foaming an Al-12Si alloy by using CaCO3 powder as a foaming agent added to the agitated melt in different weight percents. The foaming process was carried out at different foaming temperatures of 700C?, 750 C? and 800C? for 5, 10 and 15 minutes using different foaming agent percents (0.5, 1, and 1.5) wt%.

The metallic foam had been characterized by microstructure examinations, density and porosity and compression tests. It was found from the results that there is an ability to produce metallic foams based on Al –Si alloy by using CaCO3 as a foaming agent without the need for adding ceramic stabilizing materials which are always added in a high percent.

The mach inability problems caused by the presence of these materials can therefore be avoided. It was also pointed out that the porosity of metallic foams fabricated in this work increased as the foaming agent percent increases within the range used (0.5% - 1.5 %) and the preferred amount is 1%, where the optimum foaming time is 10 minutes at a foaming temperature of 750 C?. Keywords: metal foam microstructure Al-Si alloy