Abstract
The main aim of this study is to evaluate corrosion and biocompatibility behavior of thermal spray hydroxyapatite (HA) and hydroxyapatite/titania bond (HA/TiO2)-coated 316L stainless steel (316L SS). In HA/TiO2 coatings, TiO2 was used as a bond coat between HA top coat and 316L SS substrate. The coatings were characterized by x-ray diffraction and scanning electron microscopy/energy dispersive spectroscopy, and corrosion resistance determined for the uncoated substrate and the two coatings. The biological behavior was investigated by the cell culture studies using osteosarcoma cell line KHOS-NP (R-970-5). The corrosion resistance of the steel was found to increase after the deposition of the HA and HA/TiO2 bond coatings. Both HA, as well as, HA/TiO2 coatings exhibit excellent bond strength of 49 and 47 MPa, respectively. The cell culture studies showed that HA-coated 316L SS specimens appeared more biocompatible than the uncoated and HA/TiO2-coated 316L SS specimens.
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Acknowledgments
The authors gratefully acknowledge the financial support to carry out this study under ISIRD Research Grant from Indian Institute of Technology Ropar, Roopnagar, India. The authors are thankful to Dr Narinder Singh, the Department of Chemistry, the Indian Institute of Technology, Ropar for his help in cell culture studies.
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Singh, T.P., Singh, H. & Singh, H. Characterization, Corrosion Resistance, and Cell Response of High-Velocity Flame-Sprayed HA and HA/TiO2 Coatings on 316L SS. J Therm Spray Tech 21, 917–927 (2012). https://doi.org/10.1007/s11666-012-9782-x
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DOI: https://doi.org/10.1007/s11666-012-9782-x