Ti6Al4V coating with B2O3 and Al2O3 containing hydroxyapatite by HVOF technique

Document Type : Article


Department of Materials Science and Engineering, Faculty of Engineering, University of Afyon Kocatepe, 03200 Afyon, Turkey.


Calcium phosphate (Ca-P) based bioceramics has proved to be alluring materials for biomedical applications. Among these, particular attention has been given to hydroxyapatite (HA), Ca10(PO4)6(OH)2. Due to its favorable some physical, mechanical, chemical properties and biocompatibility, HA-coated Ti6Al4V alloy has been approved as one of the most interesting implant materials for orthopedic and dental applications. High Velocity Oxy Fuel (HVOF) is a method used to coat hydroxyapatite (HA) on metallic implants such as titanium (Ti) and its alloy (Ti6Al4V). In this work decreasing the crack occurrence and increasing adhesion strength were investigated. For this purpose, sol-gel synthesized nano sized HA, alumina (Al2O3) and Boron oxide (B2O3) powders were produced. First, a series of HA/Al2O3 HA/B2O3 coatings have been deposited on Ti6Al4V substrate by HVOF method. All specimens’ surfaces were used to characterize by using Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM-EDS) and X-ray Diffraction (XRD). Adhesion strength of the samples was found to affect with increasing amount of Al2O3 and B2O3 in HA. Furthermore, water contact angles of coating layer were decreased with increasing amount of Al2O3 and B2O3 in HA. This coating surface was expected to combine the advantages of Ca-P (osseointegration) and adhesion strength.


Main Subjects

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