**6. Conclusion**

aluminum was cooled down, casting can be taken out from the mold. In **Figure 19**

Experiment 5 was not completed because the molten metal was drained out from

This was the sixth experiment in which the amount of aluminum was 330 g and amount of calcium was 6 g (2% of weight). The stirring time was 60 s. All procedure was the same as described above. The drainage time of the molten metal from the

Test the aluminum that was used is pure or not, Archimedes' principle was used. In Archimedes' principle water taken in a bucket and that bucket was full of water at the top level. Then a piece of aluminum that was used for producing metallic foam was dipped into the water, and the water that was coming out from the bucket

Density of water <sup>ρ</sup><sup>w</sup> <sup>¼</sup> mw

vw

(17)

was collected into the next bucket. The weight of water was calculated and

calculations that are given below are performed:

Weigh of aluminum piece = 85 g. Weight of water displaced out = 35 g.

the microstructure of metallic foam that was produced was shown.

bottom hole was 60 s. The microstructure was shown in **Figure 20**.

**3.5 Experiment no. 5**

**3.6 Experiment no. 6**

the hole.

**Figure 20.**

**4. Result**

**102**

Weight of aluminum = 776 g.

Weight of aluminum = 330 g. Amount of CaCo3 = 6 g.

Amount of CaCo3 =?

*Microstructure of metallic foam sample 4.*

*Foams - Emerging Technologies*

There is a large potential for metal foam applications. However, there are several deficiencies with the current technology. With these opportunities for the improvement identified, research objectives were set to design a new foam product and develop a new method of production to overcome the present shortcomings. Given the current results of this research work, it is evident that these areas for improvement have been addressed, and the knowledge gained from this work lends valuable information to plan future actions for further improvement to this product.

The system was designed, fabricated and controlled for aluminum foam generation. The obtained foam was tested, and the density of metallic foam was 0.4230 � <sup>10</sup><sup>3</sup> kg/m<sup>3</sup> .
