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Conference Paper: Improvements of anti-corrosion and mechanical properties of NiTi orthopedic materials by acetylene, nitrogen and oxygen plasma immersion ion implantation

TitleImprovements of anti-corrosion and mechanical properties of NiTi orthopedic materials by acetylene, nitrogen and oxygen plasma immersion ion implantation
Authors
KeywordsCorrosion resistance
Diffusion barrier
NiTi shape memory alloys
Plasma immersion ion implantation
Issue Date2005
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/nimb
Citation
Nuclear Instruments And Methods In Physics Research, Section B: Beam Interactions With Materials And Atoms, 2005, v. 237 n. 1-2, p. 411-416 How to Cite?
AbstractNickel-titanium shape memory alloys (NiTi) are useful materials in orthopedics and orthodontics due to their unique super-elasticity and shape memory effects. However, the problem associated with the release of harmful Ni ions to human tissues and fluids has been raising safety concern. Hence, it is necessary to produce a surface barrier to impede the out-diffusion of Ni ions from the materials. We have conducted acetylene, nitrogen and oxygen plasma immersion ion implantation (PIII) into NiTi alloys in an attempt to improve the surface properties. All the implanted and annealed samples surfaces exhibit outstanding corrosion and Ni out-diffusion resistance. Besides, the implanted layers are mechanically stronger than the substrate underneath. XPS analyses disclose that the layer formed by C2H2 PIII is composed of mainly TiCx with increasing Ti to C concentration ratios towards the bulk. The nitrogen PIII layer is observed to be TiN, whereas the oxygen PIII layer is composed of oxides of Ti4+, Ti3+ and Ti 2+. © 2005 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/139530
ISSN
2014 Impact Factor: 1.124
2014 SCImago Journal Rankings: 0.601
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorPoon, RWYen_HK
dc.contributor.authorHo, JPYen_HK
dc.contributor.authorLiu, Xen_HK
dc.contributor.authorChung, CYen_HK
dc.contributor.authorChu, PKen_HK
dc.contributor.authorYeung, KWKen_HK
dc.contributor.authorLu, WWen_HK
dc.contributor.authorCheung, KMCen_HK
dc.date.accessioned2011-09-23T05:51:15Z-
dc.date.available2011-09-23T05:51:15Z-
dc.date.issued2005en_HK
dc.identifier.citationNuclear Instruments And Methods In Physics Research, Section B: Beam Interactions With Materials And Atoms, 2005, v. 237 n. 1-2, p. 411-416en_HK
dc.identifier.issn0168-583Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/139530-
dc.description.abstractNickel-titanium shape memory alloys (NiTi) are useful materials in orthopedics and orthodontics due to their unique super-elasticity and shape memory effects. However, the problem associated with the release of harmful Ni ions to human tissues and fluids has been raising safety concern. Hence, it is necessary to produce a surface barrier to impede the out-diffusion of Ni ions from the materials. We have conducted acetylene, nitrogen and oxygen plasma immersion ion implantation (PIII) into NiTi alloys in an attempt to improve the surface properties. All the implanted and annealed samples surfaces exhibit outstanding corrosion and Ni out-diffusion resistance. Besides, the implanted layers are mechanically stronger than the substrate underneath. XPS analyses disclose that the layer formed by C2H2 PIII is composed of mainly TiCx with increasing Ti to C concentration ratios towards the bulk. The nitrogen PIII layer is observed to be TiN, whereas the oxygen PIII layer is composed of oxides of Ti4+, Ti3+ and Ti 2+. © 2005 Elsevier B.V. All rights reserved.en_HK
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/nimben_HK
dc.relation.ispartofNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atomsen_HK
dc.subjectCorrosion resistanceen_HK
dc.subjectDiffusion barrieren_HK
dc.subjectNiTi shape memory alloysen_HK
dc.subjectPlasma immersion ion implantationen_HK
dc.titleImprovements of anti-corrosion and mechanical properties of NiTi orthopedic materials by acetylene, nitrogen and oxygen plasma immersion ion implantationen_HK
dc.typeConference_Paperen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0168-583X&volume=237&issue=1-2&spage=411&epage=416&date=2006&atitle=Improvements+of+anti-corrosion+and+mechanical+properties+of+NiTi+orthopedic+materials+by+acetylene,+nitrogen+and+oxygen+plasma+immersion+ion+implantation-
dc.identifier.emailYeung, KWK:wkkyeung@hkucc.hku.hken_HK
dc.identifier.emailLu, WW:wwlu@hku.hken_HK
dc.identifier.emailCheung, KMC:cheungmc@hku.hken_HK
dc.identifier.authorityYeung, KWK=rp00309en_HK
dc.identifier.authorityLu, WW=rp00411en_HK
dc.identifier.authorityCheung, KMC=rp00387en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.nimb.2005.05.030en_HK
dc.identifier.scopuseid_2-s2.0-23644434982en_HK
dc.identifier.hkuros192135en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-23644434982&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume237en_HK
dc.identifier.issue1-2en_HK
dc.identifier.spage411en_HK
dc.identifier.epage416en_HK
dc.identifier.isiWOS:000231543000077-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridPoon, RWY=34572161800en_HK
dc.identifier.scopusauthoridHo, JPY=7402650045en_HK
dc.identifier.scopusauthoridLiu, X=8603933800en_HK
dc.identifier.scopusauthoridChung, CY=8100842800en_HK
dc.identifier.scopusauthoridChu, PK=36040705700en_HK
dc.identifier.scopusauthoridYeung, KWK=13309584700en_HK
dc.identifier.scopusauthoridLu, WW=7404215221en_HK
dc.identifier.scopusauthoridCheung, KMC=7402406754en_HK

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