Fabrication of Porous Stainless Steel 316L for Biomedical Applications

Abstract

Abstract. Porous metals are very attractive materials for biomedical application as the physical and mechanical properties of these materials can be tailored similarly to the natural bone. In this work, porous stainless steel 316L has been fabricated by foam replication method. This method offers a lot of advantages including of easy processing technique, very economic, does not involve the use of toxic chemical and capable of producing porous structure that almost similar to natural bone. The porous stainless steel 316L (SS316L) samples were prepared by varying the SS316L composition from 40 wt% to 60 wt%. Sintering process was carried out at 1250C in a vacuum furnace. The microstructure and pore size were observed and determined through Scanning Electron Microscope (SEM). Archimedes method was used to measure the samples density, while compression test was carried out to determine the compressive strength and elastic modulus. The average pore size for samples with 50 wt% and 60 wt% SS316L are 268µm and 299µm respectively. Samples with 40 wt% SS316L experienced the largest shrinkage which is 33% while the sample with 60 wt% SS316L experienced the smallest shrinkage which is 21%. The density and porosity of the porous SS316L with 50 wt% SS316L are 0.43g/cm3 and 93.6% respectively, and for porous SS316L with 60 wt% SS316L are 0.69 g/cm3 and 89.2% respectively. The modulus of elasticity and compressive strength for porous SS316L with 60 wt% SS316L are 0.46 GPa and 56 MPa respectively. All these properties are in the range of the natural bone properties. Besides, the cytotoxicity test showed that this porous SS316L does not have a cytotoxic potential for biomedical implant.

Producing the Methane Conversion by Steam Methane Reforming Over SiO2-NiO Catalyst

“…The range of pore size of the SiO2 -NiO foam was in the range of 13µm to 43μm as Figure 2. The SiO2-NiO foams are also consist of the open, closed pores and interconnect of the strut [20,21]. The finding pore size of SiO2-NiO foam were probity as catalyst as the having "large" (>10nm) and "small" (<10mm) sizes.…”

Influence of the Laser Deposited 316L Single Layers on Corrosion in Physiological Media

“…Bulk improvement takes advantage of the possibility of controlling the porosity of the material by means of powder metallurgy [5,6]. More preferably, powder is processed through additive manufacturing technologies such as selective laser melting (SLM) to achieve controlled geometry scaffolds with a higher porosity design freedom than with conventional powder metallurgy [7][8][9] and research on further improving their dimensional accuracy is still ongoing [10].…”