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DS: Fachverband Dünne Schichten

DS 13: Poster

DS 13.33: Poster

Donnerstag, 20. März 2025, 18:00–20:00, P1

Structure evolution of multi-component Ti-Nb-Zr-based thin films with Ag addition during heat treatment — •Anna Benediktová, Lucie Nedvědová, Zdeněk Jansa, Palaniappan Subramanian, Michal Procházka, and Ján Minár — University of West Bohemia, Pilsen, Czech Republic

Multicomponent and high-entropy alloys represent an intensively studied group of materials. Due to their potential to be chemically and structurally very stable, wear resistant and hard, they have also become the subject of study as biomaterials. Conventional metallic biomaterials usually have many disadvantages, including inadequate antibacterial properties leading to infections and possible implant loss. To improve the surface properties, thin films with different amounts of silver as an antibacterial agent were prepared by magnetron sputtering. Their structure in the as-deposited state and the evolution of the structure during heat treatment were analyzed in detail by diffraction techniques (XRD, SAED) and by scanning and transmission electron microscopy (SEM, TEM). The chemical states of the surface were investigated by X-ray photoelectron spectroscopy (XPS). The chemical stability of the films in phosphate buffered solution (pH ~ 7.4) was evaluated by electrochemical methods such as potentiodynamic polarization and electrochemical impedance spectroscopy.

Keywords: magnetron sputtering; transmission electron microscopy; biomaterials; XPS; potentiodynamic polarization