Preparation and characterization of hydroxyapatite coating by magnetron sputtering on Mg–Zn–Ag alloys for orthopaedic trauma implants |
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| Affiliation: | 1. Faculty of Material Science and Engineering, University Politehnica of Bucharest, 313 Splaiul Independentei St., 060042, Bucharest, Romania;2. Faculty of Electrical Engineering, University Politehnica of Bucharest, 313 Splaiul Independentei St., 060042, Bucharest, Romania;3. Department for Advanced Surface Processing and Analysis by Vacuum Technologies, National Institute of Research and Development for Optoelectronics - INOE 2000, 409 Atomistilor St., RO 77125, Magurele, Romania;4. Physical Materials Science and Composite Materials Centre, Research School of Chemistry & Applied Biomedical Sciences, National Research Tomsk Polytechnic University, 30 Lenina Avenue, 634050, Tomsk, Russia;5. Faculty of Medicine and Pharmacy, Dunarea de Jos University, 35 Alexandru Ioan Cuza St., 800010, Galati, Romania;6. Academy of Romanian Scientists, 54 Splaiul Independentei St., 050094, Bucharest, Romania;7. Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche (ISM-CNR), 100 Via del Fosso del Cavaliere, 00133, Rome, Italy;8. Institute of Pharmacy, Department of Analytical, Physical and Colloid Chemistry, I.M. Sechenov First Moscow State Medical University, 8 Trubetskaya St., 119991, Moscow, Russia;1. University Politehnica of Bucharest, 313 Spl. Independentei Str., Bucharest, Romania;2. National Institute for Optoelectronics, 409 Atomistilor Str., Magurele, Romania;1. Department of Chemistry, Lomonosov Moscow State University, Moscow, 119991, Russia;2. Bernal Institute, University of Limerick, Limerick, V94 T9PX, Ireland;3. Department of Physics, Lomonosov Moscow State University, Moscow, 119991, Russia;4. Laboratory of Terahertz Spectroscopy, Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, Dolgoprudny, 141701, Russia;5. SLS, Laboratory for Synchrotron Radiation – Condensed Matter, Paul Scherrer Institute, 5232, Villigen, Switzerland;6. Department of Materials Science, MSU-BIT University, Shenzhen, 517182, China;1. Henan Key Laboratory of High Temperature Functional Ceramics, School of Material Science and Engineering, Zhengzhou University, Zhengzhou, 450052, China;2. School of Material Science and Engineering, Zhengzhou University, Zhengzhou, 450001, China;1. School of Materials Science and Engineering, Shanghai University, Shanghai, China;2. National Key Laboratory of Science and Technology on Underwater Acoustic Antagonizing, Shanghai, 201108, China;3. Shanghai Marine Electronic Equipment Research Institute, Shanghai, 201108, China;1. Department of Physics, Zhejiang Normal University, Jinhua, 321004, China;2. MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China;3. College of Environment, Hohai University, Nanjing, 210098, China |
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| Abstract: | The aim of the present paper was to evaluate the effect of hydroxyapatite coatings on the two types of Mg–Zn–Ag alloys as a possible solution to control magnesium alloy degradation. The coatings were prepared by the radio frequency magnetron sputtering method at a deposition temperature of 300 °C. To perform this evaluation, the coated alloys were immersed in a simulated body fluid solution at body temperature (37 ± 0.5 °C) to determine the corrosion resistance through electrochemical and immersion tests. Moreover, the investigation also consisted of the evaluation of microchemical, mechanical, and morphological properties. The deposition temperature of 300 °C was enough to obtain a crystalline hydroxyapatite structure with a Ca/P ratio close to the stochiometric one. The adhesion of coatings was not influenced by the nature of Mg–Zn–Ag alloys, so similar values for both coated alloys were found. The results showed that the coating was homogonous deposited on the Mg–Zn–Ag alloys and the corrosion resistance of uncoated magnesium alloys was improved. |
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| Keywords: | Hydroxyapatite coating Mg-based alloys Magnetron sputtering Surface modification Corrosion rate Biodegradability |
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