Akademik Veri Yönetim Sistemi
JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY, cilt.40, sa.3, ss.1625-1636, 2025 (SCI-Expanded)
Mg and Mg-based alloys have been light engineering materials, which are favourable in applications from aviation to biomaterials. Mono-Mg-Al and multilayered-Mg-Al(M) thin films were formed by the magnetron-sputtering method and the structural, hydrophobicity, tribological, adhesion, and electrochemical properties were investigated (Figure A). Purpose: A multilayered thin film, which has more variable properties than a monolayered one, has also been capturing attention due to the improvement of material properties. The comparison of crystalline mono (C) and multilayered (C/C) films has been focused on generally, but there is not enough amorphous-added (A/C) paper in the literature as studied in this paper. In general, multilayered films, compared to monolayered ones, are constructed with additional elements to the elements forming monolayered films. But mono and multilayered films, formed with the same elements at various sputtering powers, are not common, so they are important for investigating the property changes. The scope of this study is to explore the structural, hydrophobicity, tribological, adhesion, and electrochemical property differences of magnetron-sputtered mono-Mg-Al and multilayered-Mg-Al(M) films as a basic study for bio-applications. Theory and Methods: Thin films were formed by the magnetron sputtering method on cp-Ti by magnesium (Mg) and aluminium (Al) targets with radio frequency (RF) and direct current (DC) powers respectively and then SEM, XRD, XPS, tribometer, tensiometer, and three-electrode cell methods were performed for analysis. Mg-Al was coated at powers of 60 and 40 Watts for Mg and Al respectively. Mg-Al(M) was composed of two different layers; the first layer (60-40) was at 60 and 40 W for Mg and Al and the second layer (80-20) was at 80 and 20 W for Al and Mg. Results: When Mg-Al indicated a 10.7 N critical load for adhesion, Mg-Al(M) wasn't detected due to adherence and embedding of the film on the substrate surface. The multilayered architecture disrupted the prolonging of defects and columnar continuity, this caused retarding of the penetration of the corrosion medium and lowered corrosion potential/rate and this event affected the tribological results in the corrosive medium. Therefore, Mg-Al(M) showed a lower wear rate and friction coefficient than Mg-Al due to better corrosion behaviour. Conclusion: The multilayered Mg-Al(M) performed better tribological, adhesive, and corrosive properties than monolayered Mg-Al.