Fabrication of 316L stainless steel (SS316L) foam via powder compaction method
Metal foam is the cellular structures that made from metal and have pores in their structures. Metal foam also known as the porous metals, which express that the structure has a large volume of porosities with the value of up to 0.98 or 0.99. Porous 316L stainless steel was fabricated by powder m...
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| Format: | Thesis |
| Language: | English English English |
| Published: |
2015
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/1511/1/ZULAIKHA%20ABDULLAH%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/1511/3/24p%20ZULAIKHA%20ABDULLAH.pdf http://eprints.uthm.edu.my/1511/2/ZULAIKHA%20ABDULLAH%20WATERMARK.pdf |
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| Summary: | Metal foam is the cellular structures that made from metal and have pores in their
structures. Metal foam also known as the porous metals, which express that the
structure has a large volume of porosities with the value of up to 0.98 or 0.99. Porous
316L stainless steel was fabricated by powder metallurgy route with the composition
of the SS316L metal powder as metallic material, polyethylene glycol (PEG) and
Carbamide as the space holder with the composition of 95, 90, 85, 80, and 75 of
weight percent (wt. %). The powders were mixed in a ball mill at 60 rpm for 10
minutes and the mixtures were put into the mold for the pressing. The samples were
uniaxially pressed at 3 tons and heat treated by using box furnace at different
sintering temperature which are 870°C, 920°C, and 970°C separately. The suitable
sintering temperature was obtained from the Thermal Gravimetric Analysis (TGA).
There are several tests that have been conducted in order to characterize the physical
properties of metal foam such as density and porosity testing, and the morphological
testing (Scanning Electron Microscopy (SEM)), and Energy Dispersive X-ray (EDX).
From the result, it can be conclude that, the sintering temperature of 920°C was
compatible temperature in order to produce the metal foams which have large pores.
Other than that, the composition of 85 and 75 wt. % is the best compositions in order
to creates the homogenous mixture and allow the formation of large pore uniformly
compared to other compositions which in line with the objective to produce foams
with low density and high porosity which suitable for implant applications. The
average pore size was within range 38.555μm to 54.498 μm which can be classified
as micro pores. |
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