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Synthesis and corrosion of functionally gradient TiO2 and hydroxyapatite coatings on Ti-6Al-4V
Suresh Krishnamoorthy Seshadri
Published in
2007
Volume: 106
   
Issue: 2-3
Pages: 406 - 411
Abstract
TiO2 coating offers excellent corrosion resistance and the bone mineral hydroxyapatite (HA) offers very good biocompatibility. A suitable combination of these coatings is expected to produce good corrosion resistance as well as biocompatibility of an implant. Functionally graded coatings containing TiO2 and HA were produced on Ti-6Al-4V. Three sets of coatings were produced. The bare alloy is heated for 2 h at 800 °C to get TiO2 layer to get the first coating. The next coating consists of two layers, namely, (a) TiO2 produced by heat-treatment and (b) a second layer containing 50% TiO2 and 50% HA. The third sample contains three layers, namely, (a) TiO2 produced by heat-treatment as the first layer, followed by (b) a layer containing 50% TiO2 and 50% HA and (c) third layer of HA electrochemically deposited above the second layer. These three samples were subjected to corrosion tests in Simulated Body Fluid (SBF). It was found that coating 1 containing the oxide alone had the highest corrosion resistance followed by coatings 2 and 3. Coating 2 provides corrosion resistance and will show better implant-bone bonding. © 2007 Elsevier B.V. All rights reserved.
About the journal
JournalMaterials Chemistry and Physics
ISSN02540584
Open AccessNo
Concepts (12)
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    Biocompatibility
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    Body fluids
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    Coatings
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    Corrosion resistance
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    Heat treatment
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    Hydroxyapatite
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    Synthesis (chemical)
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    Electrochemical techniques
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    FUNCTIONALLY GRADED COATINGS
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    HYDROXYAPATITE COATINGS
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    Simulated body fluid (sbf)
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    TITANIUM COMPOUNDS