AVS 59th Annual International Symposium and Exhibition
    Tribology Focus Topic Tuesday Sessions
       Session TR-TuP

Paper TR-TuP6
Comparative Study of Tribocorrosion Behavior of Biomedical Alloys Coated with Metal-Ceramic Multilayers

Tuesday, October 30, 2012, 6:00 pm, Room Central Hall

Session: Tribology Poster Session
Presenter: M. Flores, Universidad de Guadalajara, Mexico
Authors: M. Flores, Universidad de Guadalajara, Mexico
O. Jimenez, Universidad de Guadalajara, Mexico
E. Rodriguez, Universidad de Guadalajara, Mexico
L. Huerta, Universidad Nacional Autonoma de Mexico
Correspondent: Click to Email
The tribocorrosion behavior of Ti6Al4V and CoCrMo alloys alone and coated with TiAlN/TiAl multilayers was investigated. The multilayers were deposited onto the alloys by magnetron sputtering. The structure and composition of multilayers were studied by means of XRD and RBS techniques respectively. The tribocorrosion was performed using a ball-on-flat reciprocating tribometer, the tests were conducted in a simulated body fluid at 36.5 ± 1 °C of temperature and 7.4 Ph. The loads used were between 1N and 5N, the oscillating frequency was 1Hz. The counterparts were Al2O3 balls 10 mm in diameter. The tribocorrosion and corrosion were studied using electrochemical techniques such as open circuit potential (OCP), electrochemical noise, potentiodynamic and potensiostatic polarizations in a simulated body fluid. The individual and synergistic effects of wear and corrosion on total wear loss were estimated. The worn surface was studied by means of profilometry. For the used conditions the CoCrMo alloys shows a high tribocorrosion resistance respect to the Ti6Al4V. The results indicate that multilayers improve the tribocorrosion resistance of both alloys.