The DLC Coating on 316L Stainless Steel Stochastic Voronoi Tessellation Structures Obtained by Binder Jetting Additive Manufacturing for Potential Biomedical Applications

The DLC coating of samples produced by additive manufacturing with complex shapes is a challenge but also shows the possibility obtaining diffusive barrier for biomedical applications. In this study, stochastic porous structures based on Voronoi tessellation were fabricated using binder jetting technology from 316L SS powder and modified coating. was deposited RF PACVD technology. chamber pressure 40 Pa methane gas flow rate 60 sccm. negative bias voltage 700 V. deposition time 5 min. Dimensional analysis performed optical microscopy. Surface morphology topography evaluated SEM confocal Raman spectroscopy used to examine chemical structure Finally, HR TEM evaluate physicochemical characterization interconnected spatial network accurately duplicated obtained substrates characterized high roughness (Ra = 6.43 µm). Moreover, results indicated that conditions process allow continuous tightened thickness 30 nm 230 defined content Cr2O3 SiO2.