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Hardness and elastic modulus of TiO 2 anodic films measured by instrumented indentation
Author(s) -
Soares Paulo,
Mikowski Alexandre,
Lepienski Carlos M.,
Santos Emanuel,
Soares Glória A.,
Filho Vitoldo Swinka,
Kuromoto Neide K.
Publication year - 2008
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.30900
Subject(s) - materials science , elastic modulus , scanning electron microscope , composite material , titanium , indentation , substrate (aquarium) , porosity , nanoindentation , modulus , surface roughness , raman spectroscopy , indentation hardness , metallurgy , microstructure , optics , oceanography , physics , geology
The aim of this work was to investigate the mechanical properties of the titanium anodic films (TiO 2 ) produced by anodic oxidation under galvanostatic conditions, using a 1.4 M phosphoric acid electrolyte, with different current densities ( J ) on commercially pure titanium (cp‐Ti). The morphology of the oxide films were observed by scanning electron microscopy (SEM), whereas the composition of the film was determined by Raman spectroscopy. Porosity, average roughness (Ra) and thickness of the TiO 2 films increased with the applied J . Hardness and elastic modulus were measured by instrumented indentation technique, and the influence of the substrate was corrected using analytical models. The anodic films presented higher hardness and lower elastic modulus values compared with the cp‐Ti. © 2007 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2008