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Hydroxyapatite-anatase-carbon nanotube nanocomposite coatings fabricated by electrophoretic codeposition for biomedical applications
Bokai Zhang; Chi Tat Kwok
2011-10
Source PublicationJournal of Materials Science: Materials in Medicine
ISSN0957-4530
Volume22Issue:10Pages:2249-2259
Abstract

In order to eliminate micro-cracks in the monolithic hydroxyapatite (HA) and composite hydroxyapatite/ carbon nanotube (HA/CNT) coatings, novel HA/TiO 2/CNT nanocomposite coatings on Ti6Al4V were attempted to fabricate by a single-step electrophoretic codeposition process for biomedical applications. The electrophoretically deposited layers with difference contents of HA, TiO 2 (anatase) and CNT nanoparticles were sintered at 800°C for densification with thickness of about 7-10 lm. A dense and crack-free coating was achieved with constituents of 85 wt% HA, 10 wt% TiO 2 and 5 wt% CNT. Open-circuit potential measurements and cyclic potentiodynamic polarization tests were used to investigate the electrochemical corrosion behavior of the coatings in vitro conditions (Hanks' solution at 37°C). The HA/TiO 2/ CNT coatings possess higher corrosion resistance than that of the Ti6Al4V substrate as reflected by nobler open circuit potential and lower corrosion current density. In addition, the surface hardness and adhesion strength of the HA/TiO 2/ CNT coatings are higher than that of the monolithic HA and HA/CNT coatings without compromising their apatite forming ability. The enhanced properties were attributed to the nanostructure of the coatings with the appropriate TiO2 and CNT contents for eliminating micro-cracks and micro-pores. 

DOIhttps://doi.org/10.1007/s10856-011-4416-2
URLView the original
Indexed BySCI
Language英语
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Biomedical ; Materials Science, bioMaterials
WOS IDWOS:000295712600011
PublisherSPRINGER, VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
The Source to ArticleScopus
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Cited Times [WOS]:35   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTROMECHANICAL ENGINEERING
Corresponding AuthorChi Tat Kwok
AffiliationDepartment of Electromechanical Engineering, Faculty of Science and Technology, University of Macau, Av. Padre Tomas Pereira, Taipa, Macau, China
First Author AffilicationFaculty of Science and Technology
Corresponding Author AffilicationFaculty of Science and Technology
Recommended Citation
GB/T 7714
Bokai Zhang,Chi Tat Kwok. Hydroxyapatite-anatase-carbon nanotube nanocomposite coatings fabricated by electrophoretic codeposition for biomedical applications[J]. Journal of Materials Science: Materials in Medicine,2011,22(10):2249-2259.
APA Bokai Zhang,&Chi Tat Kwok.(2011).Hydroxyapatite-anatase-carbon nanotube nanocomposite coatings fabricated by electrophoretic codeposition for biomedical applications.Journal of Materials Science: Materials in Medicine,22(10),2249-2259.
MLA Bokai Zhang,et al."Hydroxyapatite-anatase-carbon nanotube nanocomposite coatings fabricated by electrophoretic codeposition for biomedical applications".Journal of Materials Science: Materials in Medicine 22.10(2011):2249-2259.
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