Calcium filling of TiO2 nanotubes on the surface of NiTi shape memory alloys by plasma immersion ion implantation

Author

Liu, Xiangmei ; Wu, Shuilin ; Chu, Paul K. ; Hu, T. ; Chu, C.L. ; Yeung, K.W.K. ; Chung, C.Y. ; Luc, W.W. ; Cheung, K.M.C. ; Luk, K.D.K.

Author_Institution

Dept. of Phys. & Mater. Sci., City Univ. of Hong Kong, Hong Kong

fYear

2008

fDate

15-19 June 2008

Firstpage

1

Lastpage

1

Abstract

In this work, a thin layer of TiO₂ is produced on the NiTi surface using oxygen plasma immersion ion implantation (O-PIII), followed by anodization in electrolytes to induce the formation of a nanotubular layer. Finally, calcium PIII is conducted to fill the TiO₂ nanotubes with calcium. Inductively-coupled plasma mass spectrometry (ICPMS) results reveal that nickel leaching can be effectively suppressed. Immersion tests in simulated body fluid (SBF) show that the Ca-filled TiO₂ nanotubular layer can accelerate the deposition of apatite on the surface consequently significantly improving the biocompatibility of NiTi SMA.

Keywords

anodisation; biomedical materials; calcium; electrolytes; mass spectroscopic chemical analysis; nanotechnology; nanotubes; plasma immersion ion implantation; titanium compounds; NiTi; TiO₂-Ca; anodization; apatite; biocompatibility; electrolytes; inductively-coupled plasma mass spectrometry; nanotubes; nickel leaching; oxygen plasma immersion ion implantation; shape memory alloys; simulated body fluid; thin layer; Calcium; Filling; Leaching; Mass spectroscopy; Nanotubes; Nickel; Plasma accelerators; Plasma immersion ion implantation; Plasma simulation; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Plasma Science, 2008. ICOPS 2008. IEEE 35th International Conference on

Conference_Location

Karlsruhe

ISSN

0730-9244

Print_ISBN

978-1-4244-1929-6

Electronic_ISBN

0730-9244

Type

conf

DOI

10.1109/PLASMA.2008.4590717

Filename

4590717