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Article: (Ti, O)/Ti and (Ti, O, N)/Ti composite coatings fabricated via PIIID for the medical application of NiTi shape memory alloy

Title(Ti, O)/Ti and (Ti, O, N)/Ti composite coatings fabricated via PIIID for the medical application of NiTi shape memory alloy
Authors
Keywordsbioactivity
corrosion
NiTi shape memory alloy (SMA)
plasma immersion ion implantation and deposition
surface modification
Issue Date2011
PublisherJohn Wiley & Sons, Inc. The Journal's web site is located at http://www.interscience.wiley.com/jpages/0021-9304:1/
Citation
Journal Of Biomedical Materials Research - Part B Applied Biomaterials, 2011, v. 96 B n. 2, p. 249-260 How to Cite?
AbstractIn this investigation, the plasma immersion ion implantation and deposition (PIIID) technique was used to fabricate (Ti, O)/Ti or (Ti, O, N)/Ti coatings on a NiTi shape memory alloy (SMA, 50.8 at.% Ni) to improve its corrosion, wear resistance, and bioactivity. After coating fabrication, the structure and properties of composite coatings were studied, and the coated and uncoated NiTi SMA samples were compared with each other. Scanning electron microscopic (SEM) examination of coating surfaces and cross-sections showed that (Ti, O)/Ti and (Ti, O, N)/Ti composite coatings were dense and uniform, having thickness values of 1.16 ± 0.08 μm and 0.95 ± 0.06 μm, respectively. X-ray diffraction (XRD) results revealed that there were no diffraction peaks corresponding to TiO 2 or TiN for (Ti, O)/Ti and (Ti, O, N)/Ti composite coatings, suggesting that after the PIIID treatment, TiO 2 and TiN were amorphous or nanosized in the coatings. Energy dispersive X-ray (EDX) analysis indicated that the interface between the coating and NiTi SMA substrate was gradual rather than sharp. In addition, EDX elemental mapping of coating cross-sections showed that Ni was depleted from the surface. Differential scanning calorimetry (DSC) curves revealed that the shape memory ability of NiTi SMA was not degraded by the PIIID treatment. The width of wear tracks on (Ti, O, N)/Ti coated NiTi SMA samples was reduced 6.5-fold, in comparison with that on uncoated samples. The corrosion potential (E corr) was improved from -466.20 ± 37.82 mV for uncoated samples to 125.50 ± 21.49 mV and -185.40 ± 37.05 mV for (Ti, O)/Ti coated and (Ti, O, N)/Ti coated samples, respectively. Both types of coatings facilitated bone-like apatite formation on the surface of NiTi SMA in simulated body fluid (SBF), indicating their in vitro bioactivity. © 2010 Wiley Periodicals, Inc.
Persistent Identifierhttp://hdl.handle.net/10722/139389
ISSN
2015 Impact Factor: 2.881
2015 SCImago Journal Rankings: 0.784
ISI Accession Number ID
Funding AgencyGrant Number
State Key Lab of Advanced Welding Production Technology at Harbin Institute of Technology, China
University of Hong Kong, Hong Kong
University of Hong Kong (HKU)
Funding Information:

Contract grant sponsors: State Key Lab of Advanced Welding Production Technology at Harbin Institute of Technology, China, and The University of Hong Kong, Hong Kong

References

 

DC FieldValueLanguage
dc.contributor.authorSun, Ten_HK
dc.contributor.authorWang, LPen_HK
dc.contributor.authorWang, Men_HK
dc.date.accessioned2011-09-23T05:49:05Z-
dc.date.available2011-09-23T05:49:05Z-
dc.date.issued2011en_HK
dc.identifier.citationJournal Of Biomedical Materials Research - Part B Applied Biomaterials, 2011, v. 96 B n. 2, p. 249-260en_HK
dc.identifier.issn1552-4973en_HK
dc.identifier.urihttp://hdl.handle.net/10722/139389-
dc.description.abstractIn this investigation, the plasma immersion ion implantation and deposition (PIIID) technique was used to fabricate (Ti, O)/Ti or (Ti, O, N)/Ti coatings on a NiTi shape memory alloy (SMA, 50.8 at.% Ni) to improve its corrosion, wear resistance, and bioactivity. After coating fabrication, the structure and properties of composite coatings were studied, and the coated and uncoated NiTi SMA samples were compared with each other. Scanning electron microscopic (SEM) examination of coating surfaces and cross-sections showed that (Ti, O)/Ti and (Ti, O, N)/Ti composite coatings were dense and uniform, having thickness values of 1.16 ± 0.08 μm and 0.95 ± 0.06 μm, respectively. X-ray diffraction (XRD) results revealed that there were no diffraction peaks corresponding to TiO 2 or TiN for (Ti, O)/Ti and (Ti, O, N)/Ti composite coatings, suggesting that after the PIIID treatment, TiO 2 and TiN were amorphous or nanosized in the coatings. Energy dispersive X-ray (EDX) analysis indicated that the interface between the coating and NiTi SMA substrate was gradual rather than sharp. In addition, EDX elemental mapping of coating cross-sections showed that Ni was depleted from the surface. Differential scanning calorimetry (DSC) curves revealed that the shape memory ability of NiTi SMA was not degraded by the PIIID treatment. The width of wear tracks on (Ti, O, N)/Ti coated NiTi SMA samples was reduced 6.5-fold, in comparison with that on uncoated samples. The corrosion potential (E corr) was improved from -466.20 ± 37.82 mV for uncoated samples to 125.50 ± 21.49 mV and -185.40 ± 37.05 mV for (Ti, O)/Ti coated and (Ti, O, N)/Ti coated samples, respectively. Both types of coatings facilitated bone-like apatite formation on the surface of NiTi SMA in simulated body fluid (SBF), indicating their in vitro bioactivity. © 2010 Wiley Periodicals, Inc.en_HK
dc.languageengen_US
dc.publisherJohn Wiley & Sons, Inc. The Journal's web site is located at http://www.interscience.wiley.com/jpages/0021-9304:1/en_HK
dc.relation.ispartofJournal of Biomedical Materials Research - Part B Applied Biomaterialsen_HK
dc.rightsJournal of Biomedical Materials Research Part B: Applied Biomaterials. Copyright © John Wiley & Sons, Inc.en_US
dc.subjectbioactivityen_HK
dc.subjectcorrosionen_HK
dc.subjectNiTi shape memory alloy (SMA)en_HK
dc.subjectplasma immersion ion implantation and depositionen_HK
dc.subjectsurface modificationen_HK
dc.subject.meshCoated Materials, Biocompatible - chemistryen_US
dc.subject.meshMaterials Testingen_US
dc.subject.meshNickelen_US
dc.subject.meshProstheses and Implantsen_US
dc.subject.meshTitaniumen_US
dc.title(Ti, O)/Ti and (Ti, O, N)/Ti composite coatings fabricated via PIIID for the medical application of NiTi shape memory alloyen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1552-4973&volume=96&issue=2&spage=249&epage=260&date=2011&atitle=(Ti,+O)/Ti+and+(Ti,+O,+N)/Ti+composite+coatings+fabricated+via+PIIID+for+the+medical+application+of+NiTi+shape+memory+alloyen_US
dc.identifier.emailWang, M:memwang@hku.hken_HK
dc.identifier.authorityWang, M=rp00185en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/jbm.b.31760en_HK
dc.identifier.pmid21210504-
dc.identifier.scopuseid_2-s2.0-78651074480en_HK
dc.identifier.hkuros193981en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-78651074480&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume96 Ben_HK
dc.identifier.issue2en_HK
dc.identifier.spage249en_HK
dc.identifier.epage260en_HK
dc.identifier.isiWOS:000286169600008-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridSun, T=7402922748en_HK
dc.identifier.scopusauthoridWang, LP=36166042100en_HK
dc.identifier.scopusauthoridWang, M=15749714100en_HK

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