Functionally graded HA-TiO2 nanostructured composite coating on Ti-6Al-4V substrate via electrophoretic deposition

Hamidreza Farnoush; Gürol Aldiç; Hüseyin Çimenoğlu

doi:10.1016/j.surfcoat.2015.01.069

Functionally graded HA-TiO₂ nanostructured composite coating on Ti-6Al-4V substrate via electrophoretic deposition

Hamidreza Farnoush^*, Gürol Aldiç, Hüseyin Çimenoğlu

^*Corresponding author for this work

Department of Metallurgical and Materials Engineering

Research output: Contribution to journal › Article › peer-review

46 Citations (Scopus)

Abstract

In the present study, electrophoretic deposition was carried out in the ethanol-based suspensions at the voltage of 20V for 3min to form functionally graded coatings of HA/TiO₂ nanoparticles and HA-TiO₂ nanocomposite coatings with 0, 10 and 20wt.% of TiO₂ on Ti-6Al-4V substrate. The gradual addition of HA suspension into the deposition cell containing TiO₂ nanoparticles caused the functionally graded structure of HA-TiO₂ coatings. The microstructure of coatings showed the lower porosities by the addition of TiO₂ and using graded structure. The pull-off test results showed the highest bonding strength for the graded coating. The electrochemical impedance spectroscopic studies after in vitro tests, revealed that the total corrosion resistance of graded coating is higher than that of HA and HA-TiO₂ samples. The accelerated apatite formation on functionally graded coating corresponding to inductively coupled plasma spectroscopy was attributed to the higher wettability of its surface.

Original language	English
Pages (from-to)	7-15
Number of pages	9
Journal	Surface and Coatings Technology
Volume	265
DOIs	https://doi.org/10.1016/j.surfcoat.2015.01.069
Publication status	Published - 15 Mar 2015

Bibliographical note

Publisher Copyright:
© 2015 Elsevier B.V.

Keywords

Bonding strength
Electrochemical behavior
Electrophoretic deposition
Functionally graded material
Hydroxyapatite

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10.1016/j.surfcoat.2015.01.069

Cite this

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title = "Functionally graded HA-TiO2 nanostructured composite coating on Ti-6Al-4V substrate via electrophoretic deposition",

abstract = "In the present study, electrophoretic deposition was carried out in the ethanol-based suspensions at the voltage of 20V for 3min to form functionally graded coatings of HA/TiO2 nanoparticles and HA-TiO2 nanocomposite coatings with 0, 10 and 20wt.% of TiO2 on Ti-6Al-4V substrate. The gradual addition of HA suspension into the deposition cell containing TiO2 nanoparticles caused the functionally graded structure of HA-TiO2 coatings. The microstructure of coatings showed the lower porosities by the addition of TiO2 and using graded structure. The pull-off test results showed the highest bonding strength for the graded coating. The electrochemical impedance spectroscopic studies after in vitro tests, revealed that the total corrosion resistance of graded coating is higher than that of HA and HA-TiO2 samples. The accelerated apatite formation on functionally graded coating corresponding to inductively coupled plasma spectroscopy was attributed to the higher wettability of its surface.",

keywords = "Bonding strength, Electrochemical behavior, Electrophoretic deposition, Functionally graded material, Hydroxyapatite",

author = "Hamidreza Farnoush and G{\"u}rol Aldi{\c c} and H{\"u}seyin {\c C}imenoğlu",

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T1 - Functionally graded HA-TiO2 nanostructured composite coating on Ti-6Al-4V substrate via electrophoretic deposition

AU - Farnoush, Hamidreza

AU - Aldiç, Gürol

AU - Çimenoğlu, Hüseyin

PY - 2015/3/15

Y1 - 2015/3/15

N2 - In the present study, electrophoretic deposition was carried out in the ethanol-based suspensions at the voltage of 20V for 3min to form functionally graded coatings of HA/TiO2 nanoparticles and HA-TiO2 nanocomposite coatings with 0, 10 and 20wt.% of TiO2 on Ti-6Al-4V substrate. The gradual addition of HA suspension into the deposition cell containing TiO2 nanoparticles caused the functionally graded structure of HA-TiO2 coatings. The microstructure of coatings showed the lower porosities by the addition of TiO2 and using graded structure. The pull-off test results showed the highest bonding strength for the graded coating. The electrochemical impedance spectroscopic studies after in vitro tests, revealed that the total corrosion resistance of graded coating is higher than that of HA and HA-TiO2 samples. The accelerated apatite formation on functionally graded coating corresponding to inductively coupled plasma spectroscopy was attributed to the higher wettability of its surface.

AB - In the present study, electrophoretic deposition was carried out in the ethanol-based suspensions at the voltage of 20V for 3min to form functionally graded coatings of HA/TiO2 nanoparticles and HA-TiO2 nanocomposite coatings with 0, 10 and 20wt.% of TiO2 on Ti-6Al-4V substrate. The gradual addition of HA suspension into the deposition cell containing TiO2 nanoparticles caused the functionally graded structure of HA-TiO2 coatings. The microstructure of coatings showed the lower porosities by the addition of TiO2 and using graded structure. The pull-off test results showed the highest bonding strength for the graded coating. The electrochemical impedance spectroscopic studies after in vitro tests, revealed that the total corrosion resistance of graded coating is higher than that of HA and HA-TiO2 samples. The accelerated apatite formation on functionally graded coating corresponding to inductively coupled plasma spectroscopy was attributed to the higher wettability of its surface.

KW - Bonding strength

KW - Electrochemical behavior

KW - Electrophoretic deposition

KW - Functionally graded material

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