Abstract
Hydroxyapatite is a bioceramic material known as orthopedic implant due to its excellent biocompatibility. From a crystallographic aspect, HA is flexible and can accommodate different ions in its structure. Zinc (Zn) is essential in the human body due to its role in many biological functions and is known to have antibacterial properties. In this work, Zn doped hydroxyapatite coatings were developed by solution precursor plasma spraying using different zinc ion concentrations. It was found that zinc addition does not modify the morphology of coatings. X-ray diffraction analysis showed that Zn concentration greater than 10 mol% inhibits the formation of HA and favors the formation of calcium zinc phosphate. Rietveld refinement showed that the unit cell parameters were not substantially changed upon Zn addition. In general, the structural analysis revealed that Zn ions were highly likely inserted at the hydroxyl column formed by the dehydroxylation of HA under high-temperature plasma environment.
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