التفاصيل البيبلوغرافية
| العنوان: |
Electrochemical assisted deposition of calcium phosphate coatings for orthopaedic applications. |
| المؤلفون: |
Montero-Ocampo, C.1 cecilia.montero@cinvestav.edu.mx, Villegas, D.1, Veleva, L.2 |
| المصدر: |
Surface Engineering. Jan2008, Vol. 24 Issue 1, p18-22. 5p. 1 Diagram, 4 Graphs. |
| مصطلحات موضوعية: |
*SURFACE coatings, *COATING processes, *HYDROXYAPATITE coating, *CALCIUM phosphate, *TITANIUM alloys, *ORTHOPEDICS |
| مستخلص: |
Calcium phosphate (CP) coatings on Ti6Al4V alloy were grown at controlled current densities (from 3 to 10 mA cm-2) during electrochemical deposition (ECD). The thickness, structure and composition of the coatings were investigated by X-ray diffraction (XRD), infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The results showed that the thickness (ranging from 3 to 16 μm) shows a parabolic increase with the applied deposition current density. The hexagonal hydroxyapatite (HA) structure was the main phase at the current density of 10 mA cm-2 during ECD. The potential–time curves showed that the CP deposition progresses due to the initial reduction of alloy surface oxide layer, after which a reduction of nitrate ions takes place on the active free surface sites. The kinetics of this process is enhanced by sufficiently high current densities. Such current densities have a direct influence on the local pH of the solution and determine the morphology, structure and composition of ECD products. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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