Abstract
Producing bioactive hydroxyapatite coatings on metallic implant materials combines the mechanical advantages of implant materials and biological affinity of the hydroxyapatite surface to the natural tissue. In this work, hydroxyapatite was synthesized on 316L stainless steel substrates via sol–gel method by using Ca(NO3)2·4H2O and C6H15O3P. In order to improve adherence of the coatings produced, the surface of the substrate was initially modified by electrodepositing nucleus of calcium phosphate compounds. Effect of aging time for preparation of the sol solution and coating characteristics were investigated. The phase compositions and structures of the coatings were characterized by X-ray diffractometry, and scanning electron microscopy was used to determine morphological characteristics of the coatings. Adhesion between the hydroxyapatite coating and the substrate was investigated by using scanning scratch tester. The coating produced on the modified surface by the sol solution aged for 24 h was found to prove better morphological and adhesion properties.
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The authors would like to acknowledge the support provided by The Scientific & Technical Research Council of Turkey, under project number MISAG-259 and T.R. Prime Ministry State Planning Organization for providing the infrastructure of our laboratories.
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Ak Azem, F., Cakir, A. Synthesis of HAP coating on galvanostatically treated stainless steel substrates by sol–gel method. J Sol-Gel Sci Technol 51, 190–197 (2009). https://doi.org/10.1007/s10971-009-1964-8
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DOI: https://doi.org/10.1007/s10971-009-1964-8