Hardness and elastic modulus of TiO2 anodic films measured by instrumented indentation.
The aim of this work was to investigate the mechanical properties of the titanium anodic films (TiO2) produced by anodic oxidation under galvanostatic conditions, using a 1.4M 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 TiO2 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.
Soares
Paulo
P
Health Technology Post-Graduate Program, Pontifícia Universidade Católica do Paraná, 80215-901 Curitiba (PR), Brazil. pcsoaresjr@yahoo.com
Mikowski
Alexandre
A
Lepienski
Carlos M
CM
Santos
Emanuel
E
Soares
Glória A
GA
Swinka Filho
Vitoldo
V
Kuromoto
Neide K
NK
D020099:Coated Materials, Biocompatible; D004548:Elasticity; D004566:Electrodes; D006244:Hardness; D006245:Hardness Tests; D008422:Materials Testing; D010084:Oxidation-Reduction; D013499:Surface Properties; D014025:Titanium
D020099:Coated Materials, Biocompatible; C009495:titanium dioxide; D014025:Titanium