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Article: Surface structure and biomedical properties of chemically polished and electropolished NiTi shape memory alloys

TitleSurface structure and biomedical properties of chemically polished and electropolished NiTi shape memory alloys
Authors
KeywordsBiomedical properties
Electropolishing
NiTi shape memory alloy
Surface structure
Issue Date2008
PublisherElsevier SA. The Journal's web site is located at http://www.elsevier.com/locate/msec
Citation
Materials Science And Engineering C, 2008, v. 28 n. 8, p. 1430-1434 How to Cite?
AbstractThe surface structure and biomedical properties of NiTi shape memory alloy (SMA) samples after undergoing electropolishing and chemical polishing are determined and compared employing scanning electron microscopy, X-ray photoelectron spectroscopy, inductively-coupled plasma mass spectrometry, hemolysis analysis, blood platelet adhesion test, and MTT test. The results indicate that after chemical polishing, there is still a high Ni concentration on the surface of the NiTi SMA. On the other hand, electropolishing can form a thin surface titanium oxide film (about 10 nm thickness) with depleted Ni. In addition to the TiO2 phase, some titanium suboxides (TiO and Ti2O3) are found in the surface film. Compared to chemical polishing, electropolishing can more effectively mitigate out-diffusion of Ni ions and the wettability, blood compatibility, and thromboresistance are also better. However, no difference on the cytocompatibility can be observed from samples that have been chemically polished or electropolished. © 2008 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/139535
ISSN
2015 Impact Factor: 3.42
2015 SCImago Journal Rankings: 1.332
ISI Accession Number ID
Funding AgencyGrant Number
University of Ministry of Education of ChinaNCET-06-0464
National Natural Science Foundation of China50501007
Natural Science Foundation of Jiangsu ProvinceBK2007515
National High-tech Program-863 Projects of China2006AA03Z445
NSG Foundation
City University of Hong Kong Strategic Research Grant7001999
Hong Kong Research Grants Council (RGC)8730021
City University of Hong Kong Applied Research9667002
Funding Information:

The work was supported by Program for New Century Excellent Talents (NCET-06-0464) in University of Ministry of Education of China, National Natural Science Foundation of China (Project No.: 50501007), Natural Science Foundation of Jiangsu Province (Project No.: BK2007515), National High-tech Program-863 Projects of China (Project No.: 2006AA03Z445), Nippon Sheet Glass Foundation for Materials Science and Engineering (NSG Foundation), City University of Hong Kong Strategic Research Grant (SRG) No. 7001999, Hong Kong Research Grants Council (RGC) Central Allocation Grant No. 8730021, as well as City University of Hong Kong Applied Research Grant No. 9667002.

References

 

DC FieldValueLanguage
dc.contributor.authorChu, CLen_HK
dc.contributor.authorWang, RMen_HK
dc.contributor.authorHu, Ten_HK
dc.contributor.authorYin, LHen_HK
dc.contributor.authorPu, YPen_HK
dc.contributor.authorLin, PHen_HK
dc.contributor.authorWu, SLen_HK
dc.contributor.authorChung, CYen_HK
dc.contributor.authorYeung, KWKen_HK
dc.contributor.authorChu, PKen_HK
dc.date.accessioned2011-09-23T05:51:22Z-
dc.date.available2011-09-23T05:51:22Z-
dc.date.issued2008en_HK
dc.identifier.citationMaterials Science And Engineering C, 2008, v. 28 n. 8, p. 1430-1434en_HK
dc.identifier.issn0928-4931en_HK
dc.identifier.urihttp://hdl.handle.net/10722/139535-
dc.description.abstractThe surface structure and biomedical properties of NiTi shape memory alloy (SMA) samples after undergoing electropolishing and chemical polishing are determined and compared employing scanning electron microscopy, X-ray photoelectron spectroscopy, inductively-coupled plasma mass spectrometry, hemolysis analysis, blood platelet adhesion test, and MTT test. The results indicate that after chemical polishing, there is still a high Ni concentration on the surface of the NiTi SMA. On the other hand, electropolishing can form a thin surface titanium oxide film (about 10 nm thickness) with depleted Ni. In addition to the TiO2 phase, some titanium suboxides (TiO and Ti2O3) are found in the surface film. Compared to chemical polishing, electropolishing can more effectively mitigate out-diffusion of Ni ions and the wettability, blood compatibility, and thromboresistance are also better. However, no difference on the cytocompatibility can be observed from samples that have been chemically polished or electropolished. © 2008 Elsevier B.V. All rights reserved.en_HK
dc.languageengen_US
dc.publisherElsevier SA. The Journal's web site is located at http://www.elsevier.com/locate/msecen_HK
dc.relation.ispartofMaterials Science and Engineering Cen_HK
dc.subjectBiomedical propertiesen_HK
dc.subjectElectropolishingen_HK
dc.subjectNiTi shape memory alloyen_HK
dc.subjectSurface structureen_HK
dc.titleSurface structure and biomedical properties of chemically polished and electropolished NiTi shape memory alloysen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0928-4931&volume=28&issue=8&spage=1430&epage=1434&date=2008&atitle=Surface+structure+and+biomedical+properties+of+chemically+polished+and+electropolished+NiTi+shape+memory+alloys-
dc.identifier.emailYeung, KWK:wkkyeung@hkucc.hku.hken_HK
dc.identifier.authorityYeung, KWK=rp00309en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.msec.2008.03.009en_HK
dc.identifier.scopuseid_2-s2.0-56249110496en_HK
dc.identifier.hkuros192157en_US
dc.identifier.hkuros204517-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-56249110496&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume28en_HK
dc.identifier.issue8en_HK
dc.identifier.spage1430en_HK
dc.identifier.epage1434en_HK
dc.identifier.isiWOS:000261848600036-
dc.publisher.placeSwitzerlanden_HK
dc.identifier.scopusauthoridChu, CL=7404345713en_HK
dc.identifier.scopusauthoridWang, RM=21733955100en_HK
dc.identifier.scopusauthoridHu, T=25948400300en_HK
dc.identifier.scopusauthoridYin, LH=8090267900en_HK
dc.identifier.scopusauthoridPu, YP=7103191509en_HK
dc.identifier.scopusauthoridLin, PH=7403225139en_HK
dc.identifier.scopusauthoridWu, SL=15125218800en_HK
dc.identifier.scopusauthoridChung, CY=8100842800en_HK
dc.identifier.scopusauthoridYeung, KWK=13309584700en_HK
dc.identifier.scopusauthoridChu, PK=36040705700en_HK

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