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Conference Paper: Bioactivity and Corrosion Resistance of NiTi After Calcium Plasma Immersion Ion Implantation

TitleBioactivity and Corrosion Resistance of NiTi After Calcium Plasma Immersion Ion Implantation
Authors
Issue Date2007
PublisherInstitute of Electrical and Electronics Engineers. The Journal's website is located at http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000568
Citation
The 34th IEEE International Conference on Plasma Science (ICOPS 2007) and The 16th IEEE International Pulsed Power Conference (PPPS-2007), Albuquerque, NM., 17-22 June 2007. In Conference Proceedings, 2007, p. 375, no. 3P31 How to Cite?
AbstractSummary form only given. Plasma immersion ion implantation (PHI) is an effective approach to enhance the surface properties of various types of biomaterials. In order to enhance the surface bioactivity and corrosion resistance of NiTi shape memory alloy, calcium ions were implanted into NiTi alloys that have been pre-plasma-implanted with oxygen and nitrogen. The results are compared to samples without pre-treatment. The bioactivity of calcium-implanted NiTi was evaluated by immersion tests in simulated body fluid (SBF). The surface of NiTi before and after immersion tests was characterized by X-ray photoelectron spectroscopy (XPS). The XPS results reveal that the structure of the calcium-implanted layer in all the samples is composed of calcium oxide and gradually becomes a Ca-P layer after a period incubation in SBF. This Ca-P film also can be detected by scanning electron microscopy (SEM). To evaluate the anti-corrosion performance of NiTi, electrochemical potentiodynamic polarization tests were conducted on the NiTi samples in SBF. NiTi samples with pre-oxygen and nitrogen plasma implantation exhibit better corrosion resistance than single calcium-implanted samples. Our results indicate that calcium implantation can enhance the bioactivity of NiTi alloy due to the formation of calcium phosphate on the surface of the alloy. Plasma ion implantation can also improve the corrosion resistance of NiTi.
Persistent Identifierhttp://hdl.handle.net/10722/104227
ISSN

 

DC FieldValueLanguage
dc.contributor.authorLiu, XMen_HK
dc.contributor.authorWu, SLen_HK
dc.contributor.authorChu, PKen_HK
dc.contributor.authorChan, YLen_HK
dc.contributor.authorChung, CYen_HK
dc.contributor.authorChu, CLen_HK
dc.contributor.authorYeung, KWKen_HK
dc.contributor.authorLu, WWen_HK
dc.contributor.authorCheung, KMCen_HK
dc.contributor.authorLuk, KDKen_HK
dc.date.accessioned2010-09-25T21:44:19Z-
dc.date.available2010-09-25T21:44:19Z-
dc.date.issued2007en_HK
dc.identifier.citationThe 34th IEEE International Conference on Plasma Science (ICOPS 2007) and The 16th IEEE International Pulsed Power Conference (PPPS-2007), Albuquerque, NM., 17-22 June 2007. In Conference Proceedings, 2007, p. 375, no. 3P31-
dc.identifier.issn0730-9244-
dc.identifier.urihttp://hdl.handle.net/10722/104227-
dc.description.abstractSummary form only given. Plasma immersion ion implantation (PHI) is an effective approach to enhance the surface properties of various types of biomaterials. In order to enhance the surface bioactivity and corrosion resistance of NiTi shape memory alloy, calcium ions were implanted into NiTi alloys that have been pre-plasma-implanted with oxygen and nitrogen. The results are compared to samples without pre-treatment. The bioactivity of calcium-implanted NiTi was evaluated by immersion tests in simulated body fluid (SBF). The surface of NiTi before and after immersion tests was characterized by X-ray photoelectron spectroscopy (XPS). The XPS results reveal that the structure of the calcium-implanted layer in all the samples is composed of calcium oxide and gradually becomes a Ca-P layer after a period incubation in SBF. This Ca-P film also can be detected by scanning electron microscopy (SEM). To evaluate the anti-corrosion performance of NiTi, electrochemical potentiodynamic polarization tests were conducted on the NiTi samples in SBF. NiTi samples with pre-oxygen and nitrogen plasma implantation exhibit better corrosion resistance than single calcium-implanted samples. Our results indicate that calcium implantation can enhance the bioactivity of NiTi alloy due to the formation of calcium phosphate on the surface of the alloy. Plasma ion implantation can also improve the corrosion resistance of NiTi.-
dc.languageengen_HK
dc.publisherInstitute of Electrical and Electronics Engineers. The Journal's website is located at http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000568-
dc.relation.ispartofIEEE Conference Record - Abstractsen_HK
dc.rightsIEEE Conference Record - Abstracts. Copyright © Institute of Electrical and Electronics Engineers.-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.titleBioactivity and Corrosion Resistance of NiTi After Calcium Plasma Immersion Ion Implantationen_HK
dc.typeConference_Paperen_HK
dc.identifier.emailChan, YL: roycyl@graduate.hku.hken_HK
dc.identifier.emailYeung, KWK: wkkyeung@hkucc.hku.hken_HK
dc.identifier.emailLu, WW: wwlu@hkusua.hku.hken_HK
dc.identifier.emailCheung, KMC: cheungmc@hku.hken_HK
dc.identifier.emailLuk, KDK: hrmoldk@hkucc.hku.hken_HK
dc.identifier.authorityYeung, KWK=rp00309en_HK
dc.identifier.authorityLu, WW=rp00411en_HK
dc.identifier.authorityCheung, KMC=rp00387en_HK
dc.identifier.authorityLuk, KDK=rp00333en_HK
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1109/PPPS.2007.4345830-
dc.identifier.hkuros137042en_HK
dc.publisher.placeUnited States-
dc.customcontrol.immutablesml 170331 amended-

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