Study of Hydroxyapatite/Al₂O₃ (anodic) Biocomposite Coating on Titanium with a Novel Multi-Step Method

Abstract:

A novel hydroxyapatite/Al2O3 (anodic) biocomposite coating has been successfully fabricated on titanium using a multi-step technique including physical vapor deposition (PVD), anodization, electrodeposition and hydrothermal treatment. Scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), and X-ray diffraction (XRD) were employed to investigate morphologies and compositions of the pre- and post-hydrothermally treated hydroxyapatite/Al2O3 (anodic) biocomposite coatings. The results showed that plate-like Ca-deficient hydroxyapatite coating was directly elctrodeposited onto anodic Al2O3 at a constant current density of 2.0 mA/cm2 using NaH2PO4 as the phosphorous source. The plate-like Ca-deficient hydroxyapatite was converted into network-like Ca-rich hydroxyapatite after hydrothermal treatment.

• Periodical: Key Engineering Materials (Volume 312)
• Pages: 257-262
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.312.257
• Online since: June 2006
• Authors: Li Ping He, Zhen Jun Wu, Zong Zhang Chen, Yiu Wing Mai
• Keywords: Anodization, Biocomposite Coating, Electro-Deposition, Hydrothermal Treatment, Hydroxyapatite (HAP)

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