Influence of Hydrogen Charging on the Formation of Nanostructural Titania by Anodizing with Cathodic Pretreatment

The purpose of the present study was to evaluate the influences of titanium hydride on the formation of nanostructural titanium oxide by electrochemical treatment. The physico-chemical surface properties were investigated by scanning electron microscopy, cross-sectional transmission electron microscopy, thin film X-ray diffractometry, and X-ray photoelectron spectroscopy. Nanoporous structures were formed after anodization with cathodic pretreatments. The titanium hydride is formed by cathodic pretreatments. Titanium hydride was a sacrificial layer on titanium following anodization. The sacrificial layer has a phase. The is a tetragonal nanostructure and its lattice constant is . Furthermore, it was formed within titanium matrices during cathodization. The nanostructural decomposes after anodization. Furthermore, the nanoporous Ti formed by dissolution of was changed to nanoporous . The plays an important role in forming nanoporous . The triangle-like was observed on the Ti matrix and grain boundary. In the matrix, an transition occurred during cathodization. The anodization with cathodic pretreatment not only produces titanium hydride layer, but also results in formation of nanostructural titanium oxide. Nanoporous titania can be enhanced osseointegration of implant such as orthopedic and dental implants.