**4. Result**

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 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.

$$\text{Density of water } \rho\_{\text{w}} = \frac{\text{m}\_{\text{w}}}{\text{v}\_{\text{w}}} \tag{17}$$

*Design and Development of Manufacturing System Design for Producing Metallic Foam DOI: http://dx.doi.org/10.5772/intechopen.92879*

*vw* <sup>¼</sup> *mw ρw* = 3.5�10�<sup>5</sup> <sup>m</sup><sup>3</sup> .

The volume of water was equal to the volume of the aluminum piece: Density of aluminum: *<sup>ρ</sup>*Al <sup>¼</sup> *<sup>m</sup>*Al *v*Al . <sup>ρ</sup>Al = 2.42 � <sup>10</sup><sup>3</sup> kg/m<sup>3</sup> .

The density of pure aluminum was 2.319 � <sup>10</sup><sup>3</sup> kg/m<sup>3</sup> . So, there were some impurities in the aluminum that are used in this research.
