Synthesis and Coating with Electrophoretic Deposition of ZIF-8 for the Improvement of Surface Properties of CoCrW Alloy

Authors : Yakup Uzun, Ayşenur Alptekin, Şükran Merve Tüzemen, Burak Atik, Yusuf Burak Bozkurt, Ayhan Çelik

Pages : 138-143

View : 30 | Download : 24

Publication Date : 2024-12-22

Article Type : Research Paper

Abstract :Cobalt-based alloys, which exhibit excellent properties in terms of wear and high corrosion resistance as well as biocompatibility, stand out among other metallic implant materials. However, traditional production methods such as casting, forging and machining are insufficient in many industrial applications for the production of difficult-to-machine metallic special parts such as CoCr alloys. Therefore, with the developing technology, interest in modern production methods such as powder metallurgy and additive manufacturing has increased. Selective laser melting (SLM) with laser powder bed fusion (L-PBF) is one of the most preferred additive manufacturing methods for the production of materials with complex internal structures that traditional manufacturing methods cannot support. In addition, since CoCr alloys, like all other metallic materials, exhibit inert properties in terms of biocompatibility within the body, the lack of behaviors such as osseointegration, bioactivity, antibacteriality in implants produced from these alloys negatively affects the success of the implant. In this respect, surface properties can be improved by applying various surface treatments to the surfaces of these materials. In this sense, ZIF-8 metal organic framework (Zn-Zeolitic imidazolate framework) coating material, which exhibits hydrophobic character with its hexagonal geometry and porous structure, is remarkable for its chemical and thermal stability as well as its antibacterial and biocompatibility. In this study, ZIF-8 coating material was first synthesized with Zn(NO3)2 and 2-methylimidazole using methanol solvent at 50 °C. In addition, CoCrW alloy samples with dimensions of 10 x 10 x 2 mm3 were produced by SLM method. The synthesized ZIF-8 material was coated on the surface of CoCrW samples by electrophoretic deposition (EPD) method. Following the synthesis and coating processes, structural (XRD) and morphological (SEM) characterizations were performed to confirm both the successful synthesis of ZIF-8 material and the successful coating of ZIF-8 material on CoCrW sample surfaces by EPD method.
Keywords : CoCrW, biyomalzeme, antibakteriyel, ZIF-8, metal organik çerçeveler