Preparation of hydroxyapatite-titanium dioxide coating on Ti6Al4V substrates using hydrothermal-electrochemical method

Abstract

Ti6Al4V substrates were anodized in a 0.5 mol/L H₂SO₄ solution at applied voltages of 90-140 V. A hydroxyapatite-titanium oxide (HA-TiO₂) coating was then deposited on the anodized Ti6Al4V substrates via a hydrothermal-electrochemical method at a constant current. The obtained films and coatings were characterized by X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and Fourier-transform infrared spectrometry. The microstructures of the porous films on the Ti6Al4V substrates were studied to investigate the effect of the anodizing voltage on the phase and morphology of the HA-TiO₂ coating. The results indicated that both the phase composition and the morphology of the coatings were significantly influenced by changes in the anodizing voltage. HA-TiO₂ was directly precipitated onto the surface of the substrate when the applied voltage was between 110 and 140 V. The coatings had a gradient structure and the HA exhibited both needle-like and cotton-like structures. The amount of cotton-like HA structures decreased with an increase in voltage from 90 to 120 V, and then increased slightly when the voltage was higher than 120 V. The orientation index of the (002) plane of the coating was at a minimum when the Ti6Al4V substrate was pretreated at 120 V.

Keywords

Ti6Al4V / HA-TiO₂ coating / anodic oxidation / hydrothermal-electrochemical method

References

[1] Cheng LJ, Ye F, Lu XF, et al. Tissue Response of an Osteoinductive Bioceramic in Bone Defect Rabbit Model[J]. Journal of Wuhan University of Technology-Mater. Sci. Ed., 2010, 25: 28-31.

[2] Xie XH, Yu XW, Zeng SX, et al. Enhanced Osteointegration of Orthopaedic Implant Gradient Coating Composed of Bioactive Glass and Nanohydroxyapatite[J]. J. Mater. Sci. Mater. Med., 2010, 21: 2165-2173.

[3] Dorozhkin SV. Bioceramics Based on Calcium Orthophosphates (Review)[J]. Glass Ceram., 2007, 64: 442-447.

[4] Wagoner JAJ, Herschler BA. A Review of the Mechanical Behavior of CaP and CaP/Polymer Composites for Applications in Bone Replacement and Repair[J]. Acta Biomater., 2011, 7: 16-30.

[5] Vargas S, Estevez M, Hernandez A, et al. Hydroxyapatite Based Hybrid Dental Materials with Controlled Porosity and Improved Tribological and Mechanical Properties[J]. Mater. Res. Innovations, 2013, 17: 154-160.

[6] Abdi BA, Farnoush H, Sadeghi A, et al. Sol-gel Derived Nanohydroxyapatite Film on Friction Stir Processed Ti-6Al-4V Substrate[J]. Surf. Eng., 2013, 29: 205-210.

[7] Layrolle P, Van DVC, Dalmeijer R. Biomimetic Calcium Phosphate Coatings and Their Biological Performances[J]. Key. Eng. Mater., 2001, 192-195: 391-394.

[8] Thanh DT, Nam PT, Phuong NT, et al. Controlling the Electrodeposition, Morphology and Structure of Hydroxyapatite Coating on 316L Stainless Steel[J]. Mater. Sci. Eng. C Mater. Biol. Appl., 2013, 33: 2037-2045.

[9] He DH, Liu P, Liu XK, et al. Hydroxyapatite Bioceramic Coatings Prepared by Hydrothermal-electrochemical Deposition Method[J]. Journal of Wuhan University of Technology-Mater. Sci. Ed., 2014, 29: 398-400.

[10] Frayssineta P, Hardyb D, Rouqueta N, et al. New Observations on Middle Term Hydroxyapatite-coated Titanium Alloy Hip Prostheses[J]. Biomaterials, 1992, 13: 668-674.

[11] Xua JL, Khora KA, Gub YW, et al. Radio Frequency Plasma Spheroidized HA Powders: Powder Characterization and Spark Plasma Sintering Behavior[J]. Biomaterials, 2005, 26: 2197-2207.

[12] Yoshimura M. Importance of Soft Solution Processing for Advanced Inorganic Materials[J]. J. Mater. Res., 1998, 13: 796-802.

[13] Yang CY, Wang BC, Chang E, et al. Bond Degradation at the Plasmasprayed HA Coating/Ti-6AI-4V Alloy Interface: An in vitro Study[J]. J. Mater. Sci. Mater. Med., 1995, 6: 258-265.

[14] Luo R, Liu ZD, Yan FX, et al. The Biocompatibility of Hydroxyapatite Film Deposition on Micro-arc Oxidation Ti6Al4V Alloy[J]. Appl. Surf. Sci., 2013, 266: 57-61.

[15] Raman V, Tamilselvi S, Rajendran N. Electrochemical Impedance Spectroscopic Characterization of Titanium during Alkali Treatment and Apatite Growth in Simulated Body Fluid[J]. Electrochim. Acta, 2007, 52: 7418-7424.

[16] Pan YK, Chen CZ, Wang DG, et al. Preparation and Bioactivity of Micro-arc Oxidized Calcium Phosphate Coatings[J]. Mater. Chem. Phys., 2013, 141: 842-849.

[17] Alsaran A, Purcek G, Hacisalihoglu I, et al. Hydroxyapatite Production on Ultrafine-grained Pure Titanium by Micro-arc Oxidation and Hydrothermal Treatment[J]. Surf. Coat. Technol., 2011, 205: S537-S542.

[18] Shi XL, Xu LL, Wang QL. Porous TiO₂ Film Prepared by Micro-arc Oxidation and Its Electrochemical Behaviors in Hank’s Solution[J]. Surf. Coat. Technol., 2010, 205: 1730-1735.

[19] Cui X, Kim HM, Kawashita M, et al. Preparation of Bioactive Titania Films on Titanium Metal via Anodic Oxidation[J]. Dent. Mater., 2009, 25: 80-86.

[20] Zhao Y, Xiong TY. Formation of Bioactive Titania Films under Specific Anodization Conditions[J]. Surf. Eng., 2012, 28: 371-376.

[21] Wang Q, Zhang Y, Yang K, et al. Preparation of Bioactive Film on Ti6Al4V[J]. Surf. Rev. Lett., 2009, 16: 775-779.

[22] Yi XH, Fan ZG, Zhang JL, et al. Experimental Study of Preparation of TiO₂ Porous Films on the Surface of TC4 Titanium Alloy by Anodic Oxidation[J]. J. Mater. Eng., 2010 38-41.

[23] Xiao XF, Yu J, Tang HZ, et al. TiO₂ Nanotube Arrays induced Deposition of Hydroxyapatite Coating by Hydrothermal Treatment[J]. Mater. Chem. Phys., 2013, 138: 695-702.

[24] Rajesh P, Muraleedharan CV, Sureshbabu S, et al. Preparation and Analysis of Chemically Gradient Functional Bioceramic Coating Formed by Pulsed Laser Deposition[J]. J. Mater. Sci. Mater. Med., 2012, 23: 339-348.

[25] Cannillo V, Lusvarghia L, Sol A. Production and Characterization of Plasma-sprayed TiO₂-hydroxyapatite Functionally Graded Coatings[J]. J. Eur. Ceram. Soc., 2008, 28: 2161-2169.

[26] Nie X, Leyland A, Matthews A. Deposition of Layered Bioceramic Hydroxyapatite/TiO₂ Coatings on Titanium Alloys using a Hybrid Technique of Micro-arc Oxidation and Electrophoresis[J]. Surf. Coat. Technol., 2000, 125: 407-414.

[27] Du JD, Liu XK, He DH, et al. Influence of Alkali Treatment on Ti6Al4V Alloy and the HA Coating Deposited by Hydrothermalelectrochemical Methods[J]. Rare Metal Mater. Eng., 2014, 43: 830-835.

[28] Huang P, Wang J, Che DC. Study of the Crystal Structures of the Fluoridated Apatite Coatings Electrodeposited on Titanium[J]. Rare Metal Mater. Eng., 2011, 40: 233-236.

[29] Peng ZA, Peng XG. Mechanisms of the Shape Evolution of CdSe Nanocrystals[J]. J. Amer. Chem. Soc., 2001, 123: 1389-1395.

[30] Barbosa MC, Messmer NR, Brazil TR, et al. The effect of Ultrasonic Irradiation on the Crystallinity of Nano-hydroxyapatite Produced via the Wet Chemical Method[J]. Mater. Sci. Eng. C, 2013, 33: 2620-2625.

[31] Li DX, Geng YL, Li YB. Synthesis of Hydroxyapatite Nanocrystals using Hydrolysis of Dicalcium Phosphate[J]. Chin. J. Inorg. Chem., 2008, 24: 83-87.

[32] Ban S, Maruno S. Effect of PH Buffer on Electrochemical Deposition of Calcium Phosphate[J]. Jpn. J. Appl. Phys., 1994, 33: 1545-1548.

[33] Li X, Chen JY, Huang N. Characteristics of TiO₂-PTFE Composite Film Prepared by Anodization of Ti Surface[J]. J. Func. Mater., 2007, 38: 2052-2054.

[34] Mazzarolo A, Curioni M, Vicenzo A, et al. Anodic Growth of Titanium Oxide: Electrochemical Behaviour and Morphological Evolution[J]. Electrochim. Acta, 2012, 75: 288-295.

[35] Toworfea GK, Compostoa RJ, Shapiroa IM, et al. Nucleation and Growth of Calcium Phosphate on Amine-, Carboxyl-and Hydroxylsilane Self-assembled Monolayers[J]. Biomaterials, 2006, 27: 631-642.

[36] Wang J, Chao YL, Wan QB, et al. Fluoridated Hydroxyapatite Coatings on Titanium Obtained by Electrochemical Deposition[J]. Acta Biomater., 2009, 5: 1798-1807.

[37] Park HH, Park IS, Kim KS, et al. Bioactive and Electrochemical Characterization of TiO₂ Nanotubes on Titanium via Anodic Oxidation [J]. Electrochim. Acta, 2010, 55: 6109-6114.

[38] Yan YJ, Ding QQ, Huang Y, et al. Magnesium Substituted Hydroxyapatite Coating on Titanium with Nanotublar TiO₂ Intermediate Layer via Electrochemical Deposition[J]. Appl. Surf. Sci., 2014, 305: 77-85.