Effect of organic space holder in fabrication of clocedcell aluminium foam
In this work, the closed-cell aluminium foams were fabricated via powder metallurgy route with organic space holder which also known as carbamide (urea). Carbamide was added with aluminium powder at different compositions from 50wt% to 70wt%. Then the influences of sintering temperatures were also i...
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| Main Authors: | , , |
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| Format: | Conference or Workshop Item |
| Published: |
2013
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/4781/ http://eprints.uthm.edu.my/4781/1/EFFECT_OF_ORGANIC_SPACE_HOLDER.pdf |
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| Summary: | In this work, the closed-cell aluminium foams were fabricated via powder metallurgy
route with organic space holder which also known as carbamide (urea). Carbamide was added with
aluminium powder at different compositions from 50wt% to 70wt%. Then the influences of
sintering temperatures were also investigated at 500°C, 550°C and 600°C. Physical and mechanical
tests were conducted on the fabricated closed cell aluminium foam samples. The result showed that
the porosity inversely proportional with density, that means the porosity decreases as the density of
the foam increased. Also, it was revealed that the highest compressive strength was obtained at
sintering temperature of 550°C. However, the compressive strength of the closed-cell aluminium
foam decreased at the sintering temperature of 600°C. This is due to the occurrence of oxidation
problem. It can be concluded that carbamide can be proposed as one of the organic space holder
material in the fabrication of closed–cell aluminium foam. Then, the experimental parameters such
as sintering temperature, type of space holder and composition gave great influence to the
mechanical and physical properties of the fabricated closed-cell aluminium foam. |
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