Optimization of nano HA-SiC coating on AISI 316L medical grade stainless steel via electrophoretic deposition

摘要

Biocompatible nanostructured coating plays an important role in enhancement of osseointegration ability of metallic implants. This study sets out to obtain optimized SiC concentration in Hydroxyapatite (HA) coating on AISI 316L stainless steel alloy through electrophoretic deposition method. Effect of SiC concentrations (1, 2, and 3%.wt) on the morphology, corrosion behaviour, and mechanical properties of the HA coating is investigated. Results show that SiC could obstruct the formation and growth of micro cracks in the HA coating where HA-3%SiC is considered as a crack free coating. Electrochemical tests reveal that SiC has improved the corrosion resistance of HA coating, and HA-3%SiC coating has the superior corrosion resistance compared with other coatings. Interestingly, nanoindentation test proves that the presence of SiC has considerably increased the elastic modulus of coatings in comparison to the HA coating. (c) 2020 Elsevier B.V. All rights reserved.