Hanif Mahmudah, Ihwanul Aziz, Mona Sari, Nilam Cahyati, Yusril Yusuf
The coating of hydroxyapatite (HA) on the surface of a porous titanium alloy (Ti-6Al-4V) through the plasma electrolytic oxidation (PEO) method with the voltage variation 400, 450, and 500 V, the concentration of HA 1, 3, and 5 g in an electrolyte solution consisting of 2 L H2O, 4 g NaOH, 1 g NaH2PO4·H2O and duration of experiment 5, 10, and 15 minutes. In this study, commercial HA and abalone HA were used. Previous studies have not found any studies on differences in commercial HA and abalone HA. Variations were made to determine the best HA composition and strength values to optimize HA coating on porous titanium surfaces. Samples were analyzed using an X-ray diffractometer (XRD) to determine the crystal phase and a Scanning Electron Microscope (SEM) to determine surface morphology. Compressive strength test analyzed the mechanical properties of titanium. HA crystal phase appeared more in abalone HA. The resulting surface morphology is porous with a roughness that increases proportionally to the stress and HA composition. The results showed that the coating with the optimal HA phase intensity with the appropriate thickness and mechanical properties was found in samples A54(15) and K55. © 2026 Author(s).
Department of Physics, Faculty of Mathematics and Natural Science, Universitas Gadjah Mada, Sekip Utara, Bulaksumur, Yogyakarta, 55281, Indonesia; Research Center of Accelerator Technology, Research Organization of Nuclear Energy, National Research and Innovation Agency (BRIN), Yogyakarta, Indonesia; Department of Physics Education, Faculty of Mathematics and Natural Sciences, Universitas Negeri Yogyakarta, Yogyakarta, 55281, Indonesia
