Correlation between porosity and space holder content at different sintering temperatures of aluminum foam

Aluminum foam is the most popular metal foam that can be used as energy absorbers, heat exchangers, air-oil separators and structure core of fuel cells. Melt-foaming agent, melt-gas injection, investment casting and powder-foaming agent techniques can be used to manufacture aluminum foam, but these...

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Bibliographic Details
Main Authors: Rushdi, N. M. F. M., Jamaludin, S. B., Mazlee, M. N., Jamal, Z. A. Z.
Format: Conference Proceeding
Language:English
Subjects:
Aluminum
Foaming agents
Fuel cells
Gas injection
Heat exchangers
Homogeneous mixtures
Investment casting
Metal foams
Porosity
Separators
Sintering
Sintering (powder metallurgy)
Sodium chloride
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Summary:Aluminum foam is the most popular metal foam that can be used as energy absorbers, heat exchangers, air-oil separators and structure core of fuel cells. Melt-foaming agent, melt-gas injection, investment casting and powder-foaming agent techniques can be used to manufacture aluminum foam, but these techniques are too expensive. In this study, the aluminum foam was manufactured via a sintering dissolution process (SDP). Powders of aluminum and sodium chloride as space holder (25, 40, 50 wt. %) were mixed together to produce a homogeneous mixture. The mixture was compacted at 200 MPa followed by sintering at 500, 550 and 600˚C for 2 hours. A warm running water stream was used to dissolve the space holder that was embedded in the aluminum. The result showed that, the space holder content performed a significant role to control the total porosity to a value between 18 and 40%, and the porosity increased with increasing content of space holder and sintering temperature.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4958757