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Título:
WEAR RESISTANCE OF ANODIC TITANIUM DIOXIDE FILMS PRODUCED ON Ti-6Al-4V ALLOY
Autor/es:
MARÍA LAURA VERA; MARIO ROBERTO ROSENBERGER; CARLOS ENRIQUE SCHVEZOV; ALICIA ESTHER ARES
Revista:
NANOMATERIALS AND NANOTECHNOLOGY
Editorial:
INTECH
Referencias:
Lugar: Rijeka; Año: 2015
ISSN:
1847-9804
Resumen:
Ti-6Al-4V alloy with TiO2 coating is the most commonlyselected material to construct an aortic heart valve. Wearresistance is the main mechanical property to be evaluatedfor this purpose. In this paper, the wear resistance of TiO2thin films obtained by anodic oxidation of Ti-6Al-4V isevaluated. Anodic oxidation was performed at 20 V to 70V with a H2SO4 1 M electrolyte. The samples were thermallytreated at 500°C for 1 h, and crystalline phases of TiO2 wereobtained. The wear was performed in a ball-on-flat reciprocatingmachine with a range of loads from 1 gf to 4 gf andtimes between 60 s and 1200 s, using a diamond sphere ascounterface. The counterface oscillates at 0.5 Hz and 4 mmin amplitude. The wear is measured using a profilometerand is calculated as the worn volume. The wear resistanceof the coated samples is larger than the substrate, andincreases with thickness and with crystalline coating.
