Micro-scratch and corrosion behavior of functionally graded HA-TiO2 nanostructured composite coatings fabricated by electrophoretic deposition

Hamidreza Farnoush; Jamshid Aghazadeh Mohandesi; Hüseyin Çimenoğlu

doi:10.1016/j.jmbbm.2015.02.021

Micro-scratch and corrosion behavior of functionally graded HA-TiO₂ nanostructured composite coatings fabricated by electrophoretic deposition

Hamidreza Farnoush^*, Jamshid Aghazadeh Mohandesi, Hüseyin Çimenoğlu

^*Corresponding author for this work

Department of Metallurgical and Materials Engineering

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

77 Citations (Scopus)

Abstract

In the present study, functionally graded coatings of HA/TiO₂ nanoparticles and HA-TiO₂ nanocomposite coatings with 0, 10 and 20wt% of TiO₂ were fabricated by electrophoretic deposition on Ti-6Al-4V substrate. The functionally graded structure of HA/TiO₂ coatings was formed by gradual addition of HA suspension into the deposition cell containing TiO₂ nanoparticles. Micro-scratch test results showed the highest critical distances of crack initiation and delamination, normal load before failure and critical contact pressures for functionally graded coating. It was observed that the improvement of adhesion strength and fracture toughness of functionally graded coatings would be due to the reduction of thermal expansion coefficient mismatch between Ti-6Al-4V substrate and HA. The results of potentiodynamic polarization measurements showed that the graded structure of the coating could efficiently increase the corrosion resistance of substrate.

Original language	English
Pages (from-to)	31-40
Number of pages	10
Journal	Journal of the Mechanical Behavior of Biomedical Materials
Volume	46
DOIs	https://doi.org/10.1016/j.jmbbm.2015.02.021
Publication status	Published - 1 Jun 2015

Bibliographical note

Publisher Copyright:
© 2015 Elsevier Ltd.

Keywords

Corrosion behavior
Electrophoretic deposition
Functionally graded material
Hydroxyapatite
Micro-scratch

Access to Document

10.1016/j.jmbbm.2015.02.021

Cite this

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title = "Micro-scratch and corrosion behavior of functionally graded HA-TiO2 nanostructured composite coatings fabricated by electrophoretic deposition",

abstract = "In the present study, functionally graded coatings of HA/TiO2 nanoparticles and HA-TiO2 nanocomposite coatings with 0, 10 and 20wt% of TiO2 were fabricated by electrophoretic deposition on Ti-6Al-4V substrate. The functionally graded structure of HA/TiO2 coatings was formed by gradual addition of HA suspension into the deposition cell containing TiO2 nanoparticles. Micro-scratch test results showed the highest critical distances of crack initiation and delamination, normal load before failure and critical contact pressures for functionally graded coating. It was observed that the improvement of adhesion strength and fracture toughness of functionally graded coatings would be due to the reduction of thermal expansion coefficient mismatch between Ti-6Al-4V substrate and HA. The results of potentiodynamic polarization measurements showed that the graded structure of the coating could efficiently increase the corrosion resistance of substrate.",

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author = "Hamidreza Farnoush and {Aghazadeh Mohandesi}, Jamshid and H{\"u}seyin {\c C}imenoğlu",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd.",

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doi = "10.1016/j.jmbbm.2015.02.021",

language = "English",

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Micro-scratch and corrosion behavior of functionally graded HA-TiO₂ nanostructured composite coatings fabricated by electrophoretic deposition. / Farnoush, Hamidreza; Aghazadeh Mohandesi, Jamshid; Çimenoğlu, Hüseyin.
In: Journal of the Mechanical Behavior of Biomedical Materials, Vol. 46, 01.06.2015, p. 31-40.

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

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