OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 26 No. 3 2024 that with an increase in the copper concentration, the corrosion current density of the coatings increased from 3.455 to 17.570 μA/cm2. It is found that in the SBF solution, copper-titanium coatings Cu10–Cu70 have a higher corrosion potential and better corrosion resistance compared to the Ti-6Al-4V alloy, but the passivation films formed on it are more permeable than on the Ti-6Al-4V alloy. All compositions of the CuTi coatings showed bactericidal activity towards the non-pathogenic culture of Escherichia coli. It is shown that the electrospark deposition of Cu-Ti coatings reduces the surface wear of the titanium alloy Ti-6Al-4V in SBF solution many times over. Despite the lubricating effect, the wear in the SBF solution is more severe for the Ti-6Al-4V alloy and copper-titanium coatings compared to wear under dry friction conditions due to the intensive removal of the antifriction tribooxide layer. The combined action of abrasive wear and oxidation accelerated by the electrolyte was the main wear mechanism of the copper-titanium coatings, while for the Ti-6Al-4Valloy, adhesive wear was more characteristic. References 1. Geetha M., Singh A., Asokamani R., Gogia A. Ti based biomaterials, the ultimate choice for orthopaedic implants – a review. Progress in Materials Science, 2009, vol. 54, pp. 397–425. DOI: 10.1016/j.pmatsci.2008.06.004. 2. Gepreel M.A.H., Niinomi M. Biocompatibility of Ti-alloys for long-term implantation. Journal of the Mechanical Behavior of Biomedical Materials, 2013, vol. 20, pp. 407–415. DOI: 10.1016/j.jmbbm.2012.11.014. 3. Sánchez-López J.C., Rodríguez-Albelo M., Sánchez-Pérez M., Godinho V., López-Santos C., Torres Y. Ti6Al4V coatings on titanium samples by sputtering techniques: Microstructural and mechanical characterization. Journal of Alloys and Compounds, 2023, vol. 952, p. 170018. DOI: 10.1016/j.jallcom.2023.170018. 4. Banerjee R., Das S., Mukhopadhyay K., Nag S., ChakraborttyA., Chaudhuri K. Involvement of in vivo induced cheY-4 gene of Vibrio cholerae in motility, early adherence to intestinal epithelial cells and regulation of virulence factors. FEBS Letters, 2002, vol. 532, pp. 221–226. DOI: 10.1016/S0014-5793(02)03678-5. 5. Olmedo D., Fernández M.M., Guglielmotti M.B., Cabrini R.L. Macrophages related to dental implant failure. Implant Dentistry, 2003, vol. 12, pp. 75–80. DOI: 10.1097/01.ID.0000041425.36813.A9. 6. Zhao L., Chu P.K., Zhang Y., Wu Z. Antibacterial coatings on titanium implants. Journal of Biomedical Materials Research. Part B: Applied Biomaterials, 2009, vol. 91, pp. 470–480. DOI: 10.1002/jbm.b.31463. 7. Tian J., Xu K., Hu J., Zhang S., Cao G., Shao G. Durable self-polishing antifouling Cu-Ti coating by a micronscale Cu/Ti laminated microstructure design. Journal of Materials Science & Technology, 2021, vol. 79, pp. 62–74. DOI: 10.1016/j.jmst.2020.11.038. 8. Zhang J.Q., Cao S., Liu Y., Bao M.M., Ren J., Li S.Y., Wang J.J. Tribocorrosion behavior of antibacterial Ti– Cu sintered alloys in simulated biological environments. Rare Metals, 2022, vol. 41, pp. 1921–1932. DOI: 10.1007/ s12598-021-01943-6. 9. Adamiak B., Wiatrowski A., Domaradzki J., Kaczmarek D., Wojcieszak D., Mazur M. Preparation of multicomponent thin films by magnetron co-sputtering method: The Cu-Ti case study. Vacuum, 2019, vol. 161, pp. 419–428. DOI: 10.1016/j.vacuum.2019.01.012. 10. Jin X., Gao L., Liu E., Yu F., Shu X., Wang H. Microstructure, corrosion and tribological and antibacterial properties of Ti–Cu coated stainless steel. Journal of the Mechanical Behavior of Biomedical Materials, 2015, vol. 50, pp. 23–32. DOI: 10.1016/j.jmbbm.2015.06.004. 11. Wojcieszak D., Kaczmarek D.,AntosiakA., Mazur M., Rybak Z., RusakA., Szponar B. Influence of Cu–Ti thin film surface properties on antimicrobial activity and viability of living cells. Materials Science and Engineering: C, 2015, vol. 56, pp. 48–56. DOI: 10.1016/j.msec.2015.06.013. 12. Zhu Y., Yan M., Zhang Q., Wang Q., Zhuo H. Effects of the prefabricated Cu-Ti film on the microstructure and mechanical properties of the multiphase coating by thermo plasma nitriding on C17200 Cu alloy. Coatings, 2019, vol. 9, p. 694. DOI: 10.3390/coatings9110694. 13. Wang Z.Q., Wang X.R. Microstructure and flame-retardant properties of Ti-Cu coating on Tc11 prepared via electrospark deposition. Material Engineering and Mechanical Engineering: Proceedings of Material Engineering and Mechanical Engineering (MEES 2015). World Scientific, 2016, pp. 1283–1291. DOI: 10.1142/ 9789814759687_0144. 14. Radek N. Experimental investigations of the Cu-Mo and Cu-Ti electro-spark coatings modified by laser beam. Advances in Manufacturing Science and Technology, 2008, vol. 32, pp. 53–68.
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