A New Approach to Titanium-Hydroxyapatite-Bio Composite: Pressure-Assisted Coating on the Antibacterial and Electrochemical Properties of Ti6Al4V
Yamanoglu R. Alontseva D. Bahador A. Uzuner H. Khoshnaw F. Muratal O. Gumus S. Yavuz I. Ozdemir Y.
2025Johnson Matthey Public Limited Company
Johnson Matthey Technology Review
2025#69Issue 1126 - 138 pp.
This study aims to coat Ti6Al4V alloy with Ti-xHA (x = 2.5–10 wt%) mixture to improve its surface properties. A new approach using a powder metallurgical pressure-assisted sintering method was applied to the coating process. The in situ sintering and coating process was performed at 950°C for 45 min in a vacuum atmosphere of 10–4 mbar. A pressure of 50 MPa was applied during the sintering process. Staphylococcus aureus (ATCC® 29213TM) and Escherichia coli (ATCC® 25922TM) cultures were used to determine the antibacterial activity of the sintered and coated samples. The electrochemical properties of the samples were studied by Tafel extrapolation and potentiodynamic polarisation tests. The results showed that the coating layer containing 7.5 wt% of hydroxyapatite (HA) increased the antibacterial property against gram-positive and gram-negative bacterial cultures. Furthermore, it was determined that the icorr value of the material decreased and the corrosion resistance improved with an increasing HA ratio. In addition, no active-passive oxidation zone formation was observed up to 2000 mV in the HA-added samples.
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Kocaeli University, Engineering Faculty, Department of Metallurgy and Material Engineering, Kocaeli, Turkey
Laboratory of Bioengineering and Regenerative Medicine, National Laboratory Astana, Nazarbayev University, Astana, 010000, Kazakhstan
Materials Processing Institute, Eston Road, Middlesbrough, TS6 6US, United Kingdom
Kocaeli University, Kocaeli Vocational School of Health Services, Department of Medical Services and Techniques, Programme of Medical Laboratory Techniques, Kocaeli, Turkey
Kocaeli University, Faculty of Medicine, Antibody Research and Production Laboratory, Kocaeli, Turkey
School of Engineering and Sustainable Development, Faculty of Computing, Engineering and Media, De Montfort University, Leicester, LE1 9BH, United Kingdom
Toyotetsu Otomotiv, TOSB Otomotiv (OSB), Kocaeli, Turkey
Yalova University, Yalova Vocational School, Safran Campus, Dere Mahallesi, Mehmet Durman Caddesi,, Yalova, Turkey
Kocaeli University
Laboratory of Bioengineering and Regenerative Medicine
Materials Processing Institute
Kocaeli University
Kocaeli University
School of Engineering and Sustainable Development
Toyotetsu Otomotiv
Yalova University
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