RESUMO
The purpose of this study was to investigate surface characteristics of nanotube formed Ti25NbxZr alloys. Ti25NbxZr ternary alloys with 015 wt% Zr were manufactured in a vacuum arcmelting furnace. Ingots of the alloys were homogenized in an Ar atmosphere at 1000 °C for 12 h, followed by quenching in ice water. Nanotube layers were formed by an electrochemical method in 1 M H3PO4 and 0.8 wt% NaF at 30 V for 1 h. As the Zr content of the Ti25NbxZr Alloys increased, the crystals transformed from a needle-like to equiaxed structure. Two nanotube sizes were obtained on the Ti25NbxZr alloys. As the Zr content was increased, the diameters of the larger tubes decreased, whereas those of the smaller tubes increased. However, increased Zr content in the Ti25NbxZr alloys had little effect on wettability.