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Article: Functionally graded bioactive coatings of hydroxyapatite/titanium oxide composite system

TitleFunctionally graded bioactive coatings of hydroxyapatite/titanium oxide composite system
Authors
KeywordsBiomaterial
Composite
Functionally graded material
Hydroxyapatite (HA)
Nano-indentation
Ti6Al4V
Issue Date2002
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/matlet
Citation
Materials Letters, 2002, v. 55 n. 3, p. 133-137 How to Cite?
AbstractHydroxyapatite powder (P81B, HA, Plasma Biotal, UK) was mixed with titanium oxide (TiO2) in different weight percentages for producing functionally graded bioactive coatings. Composite coatings were made on Ti6Al4V metal substrate. A functionally graded coating was obtained by coating titanium oxide (TiO2) powders of known particle size as the first layer, which was sintered at 900 °C for a few minutes. Coating of subsequent layers of HA-TiO2 composites of different weight ratios (75% TiO2 and 25% HA, 50% TiO2 and 50% HA, 25% TiO2 and 75% HA, and 100% HA) were performed in sequence and these layers were sintered again at 900 °C for a few minutes so as to ensure a good adhesion between layers. The coatings were subsequently subjected to various characterization such as X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), Fourier infra-red spectroscopy (FTIR) and hardness studies. The XRD results confirmed the presence of the corresponding components in HA composites. SEM micrographs showed the surface morphology of the functionally graded layers, and the presence of elements was also identified by EDX analysis which confirms the versatility of the coating technique performed at low temperature. Nano-indentation studies revealed that HA-TiO2-Ti functionally graded coating yielded 15.1 and 0.405 GPa as the hardness and modulus values, respectively. © 2002 Elsevier Science B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/85430
ISSN
2015 Impact Factor: 2.437
2015 SCImago Journal Rankings: 0.807
References

 

DC FieldValueLanguage
dc.contributor.authorRoop Kumar, Ren_HK
dc.contributor.authorWang, Men_HK
dc.date.accessioned2010-09-06T09:04:40Z-
dc.date.available2010-09-06T09:04:40Z-
dc.date.issued2002en_HK
dc.identifier.citationMaterials Letters, 2002, v. 55 n. 3, p. 133-137en_HK
dc.identifier.issn0167-577Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/85430-
dc.description.abstractHydroxyapatite powder (P81B, HA, Plasma Biotal, UK) was mixed with titanium oxide (TiO2) in different weight percentages for producing functionally graded bioactive coatings. Composite coatings were made on Ti6Al4V metal substrate. A functionally graded coating was obtained by coating titanium oxide (TiO2) powders of known particle size as the first layer, which was sintered at 900 °C for a few minutes. Coating of subsequent layers of HA-TiO2 composites of different weight ratios (75% TiO2 and 25% HA, 50% TiO2 and 50% HA, 25% TiO2 and 75% HA, and 100% HA) were performed in sequence and these layers were sintered again at 900 °C for a few minutes so as to ensure a good adhesion between layers. The coatings were subsequently subjected to various characterization such as X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), Fourier infra-red spectroscopy (FTIR) and hardness studies. The XRD results confirmed the presence of the corresponding components in HA composites. SEM micrographs showed the surface morphology of the functionally graded layers, and the presence of elements was also identified by EDX analysis which confirms the versatility of the coating technique performed at low temperature. Nano-indentation studies revealed that HA-TiO2-Ti functionally graded coating yielded 15.1 and 0.405 GPa as the hardness and modulus values, respectively. © 2002 Elsevier Science B.V. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/matleten_HK
dc.relation.ispartofMaterials Lettersen_HK
dc.rightsMaterials Letters. Copyright © Elsevier BV.en_HK
dc.subjectBiomaterialen_HK
dc.subjectCompositeen_HK
dc.subjectFunctionally graded materialen_HK
dc.subjectHydroxyapatite (HA)en_HK
dc.subjectNano-indentationen_HK
dc.subjectTi6Al4Ven_HK
dc.titleFunctionally graded bioactive coatings of hydroxyapatite/titanium oxide composite systemen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0167-577X&volume=55&spage=133&epage=137&date=2002&atitle=Functionally+graded+bioactive+coatings+of+hydroxyapatite/titanium+oxide+composite+systemen_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/S0167-577X(01)00635-8en_HK
dc.identifier.scopuseid_2-s2.0-0036645255en_HK
dc.identifier.hkuros110858en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0036645255&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume55en_HK
dc.identifier.issue3en_HK
dc.identifier.spage133en_HK
dc.identifier.epage137en_HK
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridRoop Kumar, R=6602435898en_HK
dc.identifier.scopusauthoridWang, M=15749714100en_HK

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