CHARACTERIZATION OF SS316L FOAM USING TAPIOCA STARCH BY COMPACTION METHOD

Abstract

In this work, porous 316 L Stainless Steel (SS316 L) has been prepared by powder metallurgy route which is compaction method. This method compromises a lot of advantages including of easy processing method, very economic and environmentally friendly. Furthermore, the compaction method does not involve usage of toxic chemicals and capable to produce porous structure for variety of applications. The methods studied are compaction method and organic material as a binder. The organic material can easily burn out during sintering process and chemically stable. The SS316 L foams were fabricated in this study using starch as space holder. The SS316 L samples were prepared by varying the SS316 L composition from 40 wt%, 45 wt% and 50 wt%. Then, sintering process was conducted in high temperature at 1200^oC in a vacuum furnace. The mechanical properties and pore structures were investigated by SEM. Archimedes was used to measure bulk density and porosity of samples. The 40 wt% SS316L shows the lowest value of bulk density and highest porosity with 3.19 g/cm³ and 10.61 %, respectively. The 50 wt% SS316L shows the highest value of bulk density and lowest porosity with 6.46 g/cm³ and 1.77 %, respectively. The sample with 50 wt% were produced a good and finer structure with micro and macropores and struts comparing to other composition.