Hydroxyapatite and brushite coatings on plasma electrolytic oxidized Ti6A14V alloys obtained by the thermal substrate deposition method

摘要

Hydroxyapatite (HA) and brushite (DCPD) coatings were prepared on plasma electrolytic oxidation (PEO)-treated Ti6Al4V substrates using thermal substrate deposition (TSD) technology. For the deposition of calcium phosphate (CaP) coatings of different phase compositions, the temperature-dependent solubility phenomenon of calcium orthophosphates at a fixed solution pH was used. DCPD and calcium-deficient HA (Ca/P = 1.64) coatings were obtained at substrate temperatures of 85 degrees C and 140 degrees C, respectively. For 30 min of deposition, a 300 mu m thick HA coating consisting of both needle- and plate-shaped crystals of 4 mu m and a 50 mu m thick DCPD coating with needle-like crystals of 7 mu m were obtained. Porous morphologies were characteristic of both coatings. (C) 2019 Elsevier B.V. All rights reserved.