The gradient structure of the NiTi surface layers subjected to tantalum ion beam alloying

5th International Congress on Energy Fluxes and Radiation Effects 2016

Girsova, S.L.^1 ; Poletika, T.M.^1 ; Meisner, L.L.^1,2 ; Schmidt, E. Yu^2

Institute of Strength Physics and Material Science SB RAS, 2/4 Akademichesky ave., Tomsk

634055, Russia^1

National Research Tomsk State University, 36 Lenin ave., Tomsk

634050, Russia^2

关键词: Auger electron spectroscopies (AES);    Biological properties;    Depth of the surface layers;    Dispersion analysis;    Gradient structure;    Near-surface layers;    NiTi shape memory alloys;    Non-uniform distribution;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/830/1/012096/pdf
DOI  :  10.1088/1742-6596/830/1/012096

来源: IOP

【 摘 要 】

The NiTi shape memory alloy has been modified by ion implantation with Ta to improve the surface and biological properties. The elemental and phase composition and structure of the surface and near-surface layers of NiTi specimens after the Ta ion implantation with the fluency D = 3 × 1017cm-2and D = 6 × 1017cm-2are examined. The methods of Auger electron spectroscopy (AES), transmission electron microscopy (TEM), and electron dispersion analysis (EDS) are used. It is found that a nonuniform distribution of elements along the depth of the surface layer after the ion implantation of NiTi specimens, regardless of the regime, is accompanied by the formation of a number of sublayer structures.