High Dose Ion Implantation Into NiTi for Improvement of Pseudoplasticity and Shape Memory Effect

Authors A. Pogrebnjak1, S. Bratushka1, N. Levintant-Zayonts2

1 Sumy State University, 2, Rimsky-Korsakov Str., Sumy, 40007 Ukraine

2 Institute of Fundamental Technological Research, PAS, 21 Swietokrzyska str, 00-049 Warsaw

Е-mail alexp@i.ua
Issue Volume 5, Year 2013, Number 1
Dates Received 24 October 2012; published online 28 March 2013
Citation A. Pogrebnjak, S. Bratushka, N. Levintant-Zayonts, J. Nano- Electron. Phys. 5 No 1, 01016 (2013)
PACS Number(s) 61.72.up, 62.20.Qp, 68.35.bd
Keywords Implantation (7) , NiTi (14) , Shape memory effect, Pseudoelastic, Properties (87) .
Annotation New investigation results of N +, Mo, W, N and Ni high dose ion implantation of 1018cm – 2 influence on alloys physical and mechanical properties are presented in this article. Increasing of alloys wear resistance by abrasion of the surface layer, increasing of nanohardness, corrosion resistance, and changes of surface NiTi morphology are obtained. The correlation between the change of the elemental composition (after implantation) and the increase in mechanical properties of the alloy is observed. In other words, a nanostructure of oxycarbides and oxynitrides is formed in the surface layer as a result of high-dose ion implantation, which improves wear resistance, corrosion resistance and nanohardness of material. At the same time, the bulk properties of NiTi after implantation (pseudoplasticity and shape memory effect) do not change, which makes ion implantation an effective tool for improvement materials properties.

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