WEAR RESISTANCE AND ADHERENCE OF TIO2 SOL-GEL THIN FILMS

MIGUEL ANGEL ALTERACH; PABLO CESAR FAVILLA; MARIO ROBERTO ROSENBERGER; ALICIA ESTHER ARES; CARLOS ENRIQUE SCHVEZOV

Seattle, WA, USA.

Congreso; SUPPLEMENTAL PROCEEDINGS: VOLUME 2: MATERIALS CHARACTERIZATION, COMPUTATION, MODELING AND ENERGY; 2010

TMS

The wear resistance and adherence of TiO2 films was studied; the films were synthesized by the sol-gel dip-coating technique on a grade 5 titanium alloy. Monolayer and multilayer films were deposited by varying: dip-coating velocity, aging time of sol and the heat treatment parameters. These process conditions had influence on the color (thickness) of the film and the cracks formation. The wear resistance was measured on a ball-on-flat machine using a rotating glass ball as counterface. The worn films were evaluated by the size of the superficial scare, which can be noted by the change of color on the surface. The adherence was measured on a scratch test machine and examined by optical microscope to determine the adherent critical load. The best wear resistance and adherence of the films was measured on a trilayer film fabricated with a heat treatment at 500ºC for 1h for each layer.