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Article: A comparative study on titania layers formed on Ti, Ti-6Al-4V and NiTi shape memory alloy through a low temperature oxidation process

TitleA comparative study on titania layers formed on Ti, Ti-6Al-4V and NiTi shape memory alloy through a low temperature oxidation process
Authors
KeywordsLow temperature oxidation
NiTi shape memory alloy
Surface modification
Ti
Ti-6Al-4V
Titanium oxide
Issue Date2010
PublisherElsevier SA. The Journal's web site is located at http://www.elsevier.com/locate/surfcoat
Citation
Surface And Coatings Technology, 2010, v. 205 n. 1, p. 92-101 How to Cite?
AbstractFor improving the bioactivity and biocompatibility of metals for medical applications, anatase titania layers were synthesized on Ti, Ti-6Al-4V and NiTi shape memory alloy (SMA) using the H2O2-oxidation and hot water aging treatment method at 80°C. The thickness of the titania layers on Ti, Ti-6Al-4V and NiTi SMA was 7.43±0.93μm, 3.14±0.38μm and 4.04±0.25μm, respectively. X-ray diffraction (XRD) and transmission electron microscopic (TEM) analysis indicated that the titania layers formed were poorly crystalline anatase. Fourier transform infrared spectroscopy (FTIR) suggested that abundant Ti-OH functional groups were produced on titania, which could improve bioactivity of the metals. In addition, the titania layer formed on Ti substrate was shown to contain more molecularly chemisorbed water and Ti-OH functional groups than those on Ti-6Al-4V and NiTi SMA. Atomic force microscopic (AFM) results showed that the surface roughness values of metal samples depended on the scanning size and that surface roughness of samples significantly increased after the H2O2-oxidation and hot water aging treatment for all three metals. Compared to Ti-6Al-4V and NiTi SMA, the H2O2-treated and aged Ti samples exhibited the roughest surface. The wettability of samples was evaluated through water contact angle measurements. After the H2O2-oxidation treatment, the three metals exhibited high hydrophilicity. The bonding strength of titania layers on Ti, Ti-6Al-4V and NiTi was also investigated. Potentiodynamic polarization tests indicated that the corrosion resistance of H2O2-treated and aged Ti, Ti-6Al-4V and NiTi SMA was significantly improved due to the titania layer formation. © 2010 Elsevier B.V.
Persistent Identifierhttp://hdl.handle.net/10722/139381
ISSN
2015 Impact Factor: 2.139
2015 SCImago Journal Rankings: 0.872
ISI Accession Number ID
Funding AgencyGrant Number
University of Hong Kong (HKU)
Funding Information:

This work was supported by a research grant from The University of Hong Kong (HKU) in the Basic Research Program. T. Sun thanks HKU for providing him with a research studentship. The authors thank the technical staff in the Department of Mechanical Engineering, HKU, for their assistance.

References

 

DC FieldValueLanguage
dc.contributor.authorSun, Ten_HK
dc.contributor.authorWang, Men_HK
dc.date.accessioned2011-09-23T05:49:01Z-
dc.date.available2011-09-23T05:49:01Z-
dc.date.issued2010en_HK
dc.identifier.citationSurface And Coatings Technology, 2010, v. 205 n. 1, p. 92-101en_HK
dc.identifier.issn0257-8972en_HK
dc.identifier.urihttp://hdl.handle.net/10722/139381-
dc.description.abstractFor improving the bioactivity and biocompatibility of metals for medical applications, anatase titania layers were synthesized on Ti, Ti-6Al-4V and NiTi shape memory alloy (SMA) using the H2O2-oxidation and hot water aging treatment method at 80°C. The thickness of the titania layers on Ti, Ti-6Al-4V and NiTi SMA was 7.43±0.93μm, 3.14±0.38μm and 4.04±0.25μm, respectively. X-ray diffraction (XRD) and transmission electron microscopic (TEM) analysis indicated that the titania layers formed were poorly crystalline anatase. Fourier transform infrared spectroscopy (FTIR) suggested that abundant Ti-OH functional groups were produced on titania, which could improve bioactivity of the metals. In addition, the titania layer formed on Ti substrate was shown to contain more molecularly chemisorbed water and Ti-OH functional groups than those on Ti-6Al-4V and NiTi SMA. Atomic force microscopic (AFM) results showed that the surface roughness values of metal samples depended on the scanning size and that surface roughness of samples significantly increased after the H2O2-oxidation and hot water aging treatment for all three metals. Compared to Ti-6Al-4V and NiTi SMA, the H2O2-treated and aged Ti samples exhibited the roughest surface. The wettability of samples was evaluated through water contact angle measurements. After the H2O2-oxidation treatment, the three metals exhibited high hydrophilicity. The bonding strength of titania layers on Ti, Ti-6Al-4V and NiTi was also investigated. Potentiodynamic polarization tests indicated that the corrosion resistance of H2O2-treated and aged Ti, Ti-6Al-4V and NiTi SMA was significantly improved due to the titania layer formation. © 2010 Elsevier B.V.en_HK
dc.languageengen_US
dc.publisherElsevier SA. The Journal's web site is located at http://www.elsevier.com/locate/surfcoaten_HK
dc.relation.ispartofSurface and Coatings Technologyen_HK
dc.subjectLow temperature oxidationen_HK
dc.subjectNiTi shape memory alloyen_HK
dc.subjectSurface modificationen_HK
dc.subjectTien_HK
dc.subjectTi-6Al-4Ven_HK
dc.subjectTitanium oxideen_HK
dc.titleA comparative study on titania layers formed on Ti, Ti-6Al-4V and NiTi shape memory alloy through a low temperature oxidation processen_HK
dc.typeArticleen_HK
dc.identifier.emailWang, M:memwang@hku.hken_HK
dc.identifier.authorityWang, M=rp00185en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.surfcoat.2010.06.019en_HK
dc.identifier.scopuseid_2-s2.0-77954959562en_HK
dc.identifier.hkuros193968en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-77954959562&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume205en_HK
dc.identifier.issue1en_HK
dc.identifier.spage92en_HK
dc.identifier.epage101en_HK
dc.identifier.isiWOS:000282494800013-
dc.publisher.placeSwitzerlanden_HK
dc.identifier.scopusauthoridSun, T=7402922748en_HK
dc.identifier.scopusauthoridWang, M=15749714100en_HK
dc.identifier.citeulike7407572-

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