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The present study has been aimed to investigate the preparation and analysis of calcium phosphate (CaP) based hydroxyapatite (HA, Ca10(PO4)6(OH)2) coatings formed on Ti6Al4V alloys in a new buffer environment. The coating process has been performed by means of biomimetic method. In the study, a synthetic body fluid (SBF), which is fully compatible with human blood plasma, has been prepared for the first time in the literature by using the citric acid – sodium citrate buffer system. Using this buffer system will not cause any toxic reactions in the human body. CaP coating of the Ti6Al4V surface has been performed in this new SBF. The surface roughness and thickness specifications of the coatings have been determined, their microstructures have been analyzed by using a scanning electron microscope (SEM), the elemental analysis (EDX) of the coating surfaces and the XRD analysis have been done. The results are presented and discussed.

This study aims to examine the fracture and surface adhesion behavior of hydroxyapatite (HA) coatings created in acitric acid – sodium citrate buffer system. Coatings were implemented on the surface of Ti6Al4V. The modulus of elasticity, hardness and adhesion strength values of the presented coatings were determined, the fracture toughness values were calculated and scanning electron microscope (SEM) images were taken as well. Finally, the mechanical properties found by the tests implemented to hydroxyapatite coatings applied on Ti6Al4V, which yielded successful outcomes were compared to the mechanical properties of bone. The fracture toughness achieved in this study was found to be more compatible with the mechanical properties of the original bone itself when compared to the literature findings. Besides, the adhesion strength was found to be remarkably high.

The new CaP coating can be used in orthopedic surgery as catalyzer to improve bone ingrowth. We believe that our research will form a model for further research on biomimetic coatings on Ti-6Al-4V substrates.

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Biomimetic is an expression used to define the substances, tools, mechanism, a systems created by humans through imitating the systems existing in the nature. With this method the surfaces of base materials activated by various chemicals are coated inside synthetic body fluid (SBF) that is created in the laboratory ground by using the method of defecation. As coating is conducted in an environment which has synthetic body fluid, biomaterials that are completely harmonious with the body can be obtained.In this study it is aimed to create hydroxyapatite (HA) coating that is completely harmonious with human blood plasma, in Alanin and Alanine Sodium Salt environment by using biomimetic technics for the first time in literature and to analyse it. In the process of HA coating, Ti6A14V alloyed implant materials have been used as base material.In the study, implant materials having Ti6Al4V alloy have been first sandpapered and then they were washed first with pure water and then with acetone. The materials that were also cleaned inside the ultrasonic bathroom, have been waited for 1 day in the 100 mL 5M NaOH + 0,5 mL H2O2 solution in drying-oven for being activated. Later on NaOH was transferred and the materials were washed with pure water. Afterwards it is left to dry at 60 ºC for 24 hours. After being dried, it was waited for 1 hour at 600 ºC and than cooled. With the completion of this process, the synthetic body fluid solution (2L) was obtained with the temperature at 37 ºC and pH value at ~7,4. Coating process was realised inside SBF with waiting periods of 24, 48, 72, and 96 hours. Relating to the coatings obtained by biomimetic method, surface smoothness and thickness specifications have been determined, their micro structure has been analysed by using Scanning Electron Microscope (SEM), the elementary analyses namely Energy Dispersive X-ray Spectroscopy (EDS) for the surfaces of coating have been determined and X-Ray Diffraction (XRD) analysis have been conducted for obtaining information regarding phases and the concentrations of the phases. The results obtained from the study have been evaluated and discussed.