Fabrication of Near Net Shape Metallic Foam via Plaster Mould

材料科学技术（英）, 2008, 24(3): 335-339.

^1, , ^2, , ^3, , ^4, , ^5,

1.i-Cube Center, School of Nano and Advanced Materials Engineering, Gyeongsang National University, Jinju 660-701, Korea

2.i-Cube Center, School of Nano and Advanced Materials Engineering, Gyeongsang National University, Jinju 660-701, Korea

3.i-Cube Center, School of Nano and Advanced Materials Engineering, Gyeongsang National University, Jinju 660-701, Korea

4.i-Cube Center, School of Nano and Advanced Materials Engineering, Gyeongsang National University, Jinju 660-701, Korea

5.ERIC, School of Nano and Advanced Materials Engineering, Gyeongsang National University, Jinju 660-701, Korea

Fabrication of Near Net Shape Metallic Foam via Plaster Mould

Young-Hwan Song ^1, , Hwan-Coo Seon ^2, , Soo-Han Parka ^3, , Min-Jae deong ^4, , Bo-Young Hur ^5,

1.i-Cube Center, School of Nano and Advanced Materials Engineering, Gyeongsang National University, Jinju 660-701, Korea

2.i-Cube Center, School of Nano and Advanced Materials Engineering, Gyeongsang National University, Jinju 660-701, Korea

3.i-Cube Center, School of Nano and Advanced Materials Engineering, Gyeongsang National University, Jinju 660-701, Korea

4.i-Cube Center, School of Nano and Advanced Materials Engineering, Gyeongsang National University, Jinju 660-701, Korea

5.ERIC, School of Nano and Advanced Materials Engineering, Gyeongsang National University, Jinju 660-701, Korea

Keywords： Metal foam

Fabrication characteristics are unstable in direct foaming method. Therefore, most of near net-shape metallic foams are produced, and investigated by powder metallurgy. Direct foaming method, however, has many benefits (i.e. reduce the unit cost of goods and fabrication process etc.) to fabrication of metallic foams. In this article, the fabrication characteristic of near net-shape metallic foams by direct foaming method was evaluated. AI and Plaster was used for base material and mould material respectively. Ca and TiH2 were added to molten Al as thickening and blowing agent for stable condition of bubbles. Thickening time was about 10 min with a stirring speed of 600 r/min. Foaming time was 30-120 s for evaluation of the optimum foaming condition. Amount of agent was selected by pre-experimental data. Porosity of near net-shape goods was measured by Archimedes method. On the other hand, it seems that increasing poring time and thickening agent make the poor porosity

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Fabrication of Near Net Shape Metallic Foam via Plaster Mould

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