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Electrochemical Behavior of Biomedical Titanium Alloys Coated with Diamond Carbon in Hanks’ Solution
L. Mohan, Ramadoss Radhika, K. Ramasubramanian
Published in Springer New York LLC
2018
Volume: 27
   
Issue: 4
Pages: 1635 - 1641
Abstract
Biomedical implants in the knee and hip are frequent failures because of corrosion and stress on the joints. To solve this important problem, metal implants can be coated with diamond carbon, and this coating plays a critical role in providing an increased resistance to implants toward corrosion. In this study, we have employed diamond carbon coating over Ti-6Al-4V and Ti-13Nb-13Zr alloys using hot filament chemical vapor deposition method which is well-established coating process that significantly improves the resistance toward corrosion, wears and hardness. The diamond carbon-coated Ti-13Nb-13Zr alloy showed an increased microhardness in the range of 850 HV. Electrochemical impedance spectroscopy and polarization studies in SBF solution (simulated body fluid solution) were carried out to understand the in vitro behavior of uncoated as well as coated titanium alloys. The experimental results showed that the corrosion resistance of Ti-13Nb-13Zr alloy is relatively higher when compared with diamond carbon-coated Ti-6Al-4V alloys due to the presence of β phase in the Ti-13Nb-13Zr alloy. Electrochemical impedance results showed that the diamond carbon-coated alloys behave as an ideal capacitor in the body fluid solution. Moreover, the stability in mechanical properties during the corrosion process was maintained for diamond carbon-coated titanium alloys. © 2018, ASM International.
About the journal
JournalData powered by TypesetJournal of Materials Engineering and Performance
PublisherData powered by TypesetSpringer New York LLC
ISSN10599495
Open AccessYes
Concepts (27)
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    Aluminum
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    Aluminum alloys
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    Aluminum coatings
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    Body fluids
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    Chemical vapor deposition
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    Coatings
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    Corrosion
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    Corrosion resistance
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    Corrosion resistant alloys
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    Diamonds
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    Electrochemical corrosion
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    Electrochemical impedance spectroscopy
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    Niobium
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    Niobium alloys
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    Ternary alloys
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    Titanium
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    Zirconium
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    Zirconium alloys
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    Biomedical implants
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    BIOMEDICAL TITANIUM ALLOY
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    Electrochemical behaviors
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    Electrochemical impedance
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    HFCVD
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    Hot-filament chemical vapor deposition
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    Polarization study
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    Simulated body fluids
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    Titanium alloys