In-situ formation of Ag nanoparticles in the MAO coating during the processing of cp-Ti

Maj, Ł. and Fogarassy, Z. and Wojtas, D. and Jarzębska, A. and Muhaffel, F. and Sulyok, A. and Góral, A. and Kulczyk, M. and Çimenoğlu, H. and Bieda, M. (2023) In-situ formation of Ag nanoparticles in the MAO coating during the processing of cp-Ti. SCIENTIFIC REPORTS, 13. ArtNo: 3230. ISSN 2045-2322

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Abstract

Silver nanoparticle (Ag-NP) containing antibacterial micro-arc oxidation (MAO) coatings have already been synthesized over titanium-based materials via the MAO process employed in silver acetate (AgC2H3O2) containing electrolyte. However, the way of incorporation and in-situ formation of Ag-NPs within the MAO coating have not been documented yet. Present work was initiated to reveal the mechanism of Ag-NP formation within the MAO coatings. Thus, the structure of the MAO coating fabricated on commercial purity titanium in the AgC2H3O2-containing electrolyte was investigated by electron microscopy techniques. To this end, the cross-sectional high-resolution electron microscopy studies were carried out on lamella cut out with the focused ion beam technique, and these investigations were backed by X-ray photoelectron spectroscopy measurements of chemical composition on the surface of the MAO coating. These studies revealed that Ag is dispersed in the form of nanoparticles throughout the coating and that a higher density was confirmed closer to the micro-pores.

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