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Erschienen in:
2016 | OriginalPaper | Buchkapitel
Adhesion of Anodic Titanium Dioxide Coatings on Titanium Grades 5 Alloys
verfasst von : María Laura Vera, Mario Roberto Rosenberger, Carlos E. Schvezov, Alicia E. Ares
Erschienen in: TMS 2015 144th Annual Meeting & Exhibition
Verlag: Springer International Publishing
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In the present research the adhesion of thin anodic coatings of TiO2 (40 nm to 140 nm) is evaluated. Coatings were produced by anodic oxidation of Ti-6Al-4V, using H2SO4 as electrolyte at different voltages (20 V to 70 V), employing heat treatments of 1 h at 500 ℃ and 600 ℃.The adhesion of coatings was evaluated by scratch test with load rates of 2 N/mm and 4 N/mm and up to 10 N and 20 N of maximum load.The adhesion was dependent on the increasing load rates. At larger rate a brittle behavior was found and the critical load decreased with heat treatment temperature. For non-heat treated coatings, the critical load of adherence increased with coating thickness.