Ti-O/Ti-N biomedical gradient films synthesized by metal vacuum arc plasma deposition and thermal oxidation

Author

Leng, Y.X. ; Sun, Hongbin ; Yang, Ping ; Chen, J.Y. ; Wan, G.J. ; Wang, Jiacheng ; Huang, Nicole

Author_Institution

Sch. of Mater. Sci. & Eng., Southwest Jiaotong Univ., Chengdu, China

fYear

2003

fDate

5-5 June 2003

Firstpage

281

Abstract

Summary form only given, as follows. In the last two decades, low temperature isotropic pyrolytic carbon (LTIC) has been the best material for fabricating artificial heart valves. However, the blood compatibility of LTIC is not sufficient for prolonged clinical use. TiO/TiN films were synthesized on 1Cr18Ni9Ti substrates. Ti-N films were deposited on 1Cr18Ni9Ti substrate by metal vacuum arc deposition. Then the as-deposited Ti-N films were oxidized at 600/spl deg/ for 25 min to synthesize Ti-O/Ti-N gradient film. In the complex Ti-O/Ti-N structure, the presence of Ti-O improves the blood compatibility and the main effect of Ti-N is to improve the mechanical properties. The composition, microstructure and mechanical properties of Ti-N and Ti-O/Ti-N gradient film were examined by XPS, XRD, microhardness tester and ball-on-disk wear test. Using a constant-potential method, the anodic polarization of the films has been measured, and the corrosion resistance properties of the films have been evaluated.

Keywords

biomedical materials; cardiology; plasma CVD coatings; prosthetics; titanium compounds; vacuum arcs; 1Cr18Ni9Ti substrates; 600 degC; Cr-Ni-Ti; Ti-O-Ti-N; XPS; XRD; anodic polarization; artificial heart valves; ball-on-disk wear test; blood compatibility; constant-potential method; corrosion resistance properties; low temperature isotropic pyrolytic carbon; metal vacuum arc deposition; microhardness; thrombus formation; Biological materials; Biomedical materials; Blood; Mechanical factors; Oxidation; Plasma materials processing; Plasma temperature; Substrates; Testing; Vacuum arcs;

fLanguage

English

Publisher

ieee

Conference_Titel

Plasma Science, 2003. ICOPS 2003. IEEE Conference Record - Abstracts. The 30th International Conference on

Conference_Location

Jeju, South Korea

ISSN

0730-9244

Print_ISBN

0-7803-7911-X

Type

conf

DOI

10.1109/PLASMA.2003.1228829

Filename

1228829