Nanoporous anodic oxide films on Ti-Al powder alloy

Data on anodic oxide films produced by anodizing sintered powder Ti-40%Al samples in fluorine water solution 10%H 2SO 4+0,15 %HF are analyzed. The influence of anodizing parameters (regime, values of current density or voltage and anodizing duration) on dependences of current density and voltage on time, i.e. j a(t) and U a(t) were studied. üptimal conditions for self-organized nanostructured oxide films formation were determined. The structure of the surface and cross-sections of investigated samples before and after anodizing was studied by means of scanning electron microscopy. It was shown that under optimal anodizing conditions the self-organized porous film about 350 nm thick with effective pore diameter value p> = (70 ± 10) nm is formed on the powder particles’ surface. It was established that the oxide film consists essentially of TiO 2:Al 2O 3 in a ratio of approximately 1:1. Anodizing of heat resistant powder Ti-40%Al alloy in fluorine water solution is promising for creation of new catalytic nanomaterials.