Micro-arc oxidation of Ti6Al4V and Ti6Al7Nb alloys for biomedical applications

Huseyin Cimenoglu; Mert Gunyuz; Gamze Torun Kose; Murat Baydogan; Faysal Uǧurlu; Cem Sener

doi:10.1016/j.matchar.2011.01.002

Micro-arc oxidation of Ti6Al4V and Ti6Al7Nb alloys for biomedical applications

Huseyin Cimenoglu^*, Mert Gunyuz, Gamze Torun Kose, Murat Baydogan, Faysal Uǧurlu, Cem Sener

^*Corresponding author for this work

Department of Metallurgical and Materials Engineering

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

116 Citations (Scopus)

Abstract

In the present study, the in-vitro biological responses of two competitive titanium alloys (Ti6Al4V and Ti6Al7Nb) were investigated after modifying their surfaces by the micro-arc oxidation (MAO) process conducted in a (CH ₃COO)₂Ca•H₂O and Na₃PO ₄ containing electrolyte under identical electrical parameters and exposure time. After the process, the surfaces of the alloys were covered with a thick (approx. 10 μm) TiO₂ layer exhibiting different characteristics. The oxide layer of the Ti6Al4V alloy was porous and contained hydroxyapatite precipitates whereas the oxide layer of the Ti6Al7Nb alloy showed a more grainy appearance and contained calcium titanate precipitates. Simulated body fluid (SBF) and cell culture tests were conducted to compare the biological performance of the alloys. Even though oxidized alloys exhibited somewhat similar response in SBF tests, the number of SAOS-2 cells attached to the oxide layer of the Ti6Al4V alloy was greater than that of the T6Al7Nb alloy.

Original language	English
Pages (from-to)	304-311
Number of pages	8
Journal	Materials Characterization
Volume	62
Issue number	3
DOIs	https://doi.org/10.1016/j.matchar.2011.01.002
Publication status	Published - Mar 2011

Funding

The authors greatly acknowledge financial support provided by The Scientific and Technical Research Council of Turkey (TUBITAK) under contract no. 105M062 . The MAO equipment used in the present work was supplied by the State Planning Organization of Turkey through project no. 90158.

Funders	Funder number
TUBITAK	105M062
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu

Keywords

Biocompatibility
Micro-arc oxidation
Ti6Al4V
Ti6Al7Nb
Titanium

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title = "Micro-arc oxidation of Ti6Al4V and Ti6Al7Nb alloys for biomedical applications",

abstract = "In the present study, the in-vitro biological responses of two competitive titanium alloys (Ti6Al4V and Ti6Al7Nb) were investigated after modifying their surfaces by the micro-arc oxidation (MAO) process conducted in a (CH 3COO)2Ca•H2O and Na3PO 4 containing electrolyte under identical electrical parameters and exposure time. After the process, the surfaces of the alloys were covered with a thick (approx. 10 μm) TiO2 layer exhibiting different characteristics. The oxide layer of the Ti6Al4V alloy was porous and contained hydroxyapatite precipitates whereas the oxide layer of the Ti6Al7Nb alloy showed a more grainy appearance and contained calcium titanate precipitates. Simulated body fluid (SBF) and cell culture tests were conducted to compare the biological performance of the alloys. Even though oxidized alloys exhibited somewhat similar response in SBF tests, the number of SAOS-2 cells attached to the oxide layer of the Ti6Al4V alloy was greater than that of the T6Al7Nb alloy.",

keywords = "Biocompatibility, Micro-arc oxidation, Ti6Al4V, Ti6Al7Nb, Titanium",

author = "Huseyin Cimenoglu and Mert Gunyuz and Kose, {Gamze Torun} and Murat Baydogan and Faysal Uǧurlu and Cem Sener",

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AU - Cimenoglu, Huseyin

AU - Gunyuz, Mert

AU - Kose, Gamze Torun

AU - Baydogan, Murat

AU - Uǧurlu, Faysal

AU - Sener, Cem

PY - 2011/3

Y1 - 2011/3

N2 - In the present study, the in-vitro biological responses of two competitive titanium alloys (Ti6Al4V and Ti6Al7Nb) were investigated after modifying their surfaces by the micro-arc oxidation (MAO) process conducted in a (CH 3COO)2Ca•H2O and Na3PO 4 containing electrolyte under identical electrical parameters and exposure time. After the process, the surfaces of the alloys were covered with a thick (approx. 10 μm) TiO2 layer exhibiting different characteristics. The oxide layer of the Ti6Al4V alloy was porous and contained hydroxyapatite precipitates whereas the oxide layer of the Ti6Al7Nb alloy showed a more grainy appearance and contained calcium titanate precipitates. Simulated body fluid (SBF) and cell culture tests were conducted to compare the biological performance of the alloys. Even though oxidized alloys exhibited somewhat similar response in SBF tests, the number of SAOS-2 cells attached to the oxide layer of the Ti6Al4V alloy was greater than that of the T6Al7Nb alloy.

AB - In the present study, the in-vitro biological responses of two competitive titanium alloys (Ti6Al4V and Ti6Al7Nb) were investigated after modifying their surfaces by the micro-arc oxidation (MAO) process conducted in a (CH 3COO)2Ca•H2O and Na3PO 4 containing electrolyte under identical electrical parameters and exposure time. After the process, the surfaces of the alloys were covered with a thick (approx. 10 μm) TiO2 layer exhibiting different characteristics. The oxide layer of the Ti6Al4V alloy was porous and contained hydroxyapatite precipitates whereas the oxide layer of the Ti6Al7Nb alloy showed a more grainy appearance and contained calcium titanate precipitates. Simulated body fluid (SBF) and cell culture tests were conducted to compare the biological performance of the alloys. Even though oxidized alloys exhibited somewhat similar response in SBF tests, the number of SAOS-2 cells attached to the oxide layer of the Ti6Al4V alloy was greater than that of the T6Al7Nb alloy.

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KW - Ti6Al7Nb

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Micro-arc oxidation of Ti6Al4V and Ti6Al7Nb alloys for biomedical applications

Abstract

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Keywords

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