Effect of Porous Oxide Films on Characterization and Bioactivity of Titanium Niobium Alloy by Electrochemical Treatments

Abstract

In the present investigation, the mechanical properties of TiNb alloys were modified by electrochemical treatment. The properties of the TiNb alloy specimens were determined by electrochemical measurement and material analyses. The effects of titanium hydride compounds on the formation of porous structural oxide film during electrochemical surface treatment are examined by XPS, TF-XRD and SEM. Oxide films are formed during anodization following cathodic pretreatments. TiH 1.971 is formed by cathodic pretreatment. The TiH 1.971 is directly dissolved following anodic treatment.Additionally, the porous TiNb that was formed by the dissolution of TiH 1.971 were modified to porous oxide films.Hydrogen charging is important in forming porous oxide films.Anodization following cathodic pretreatment not only yields a thick oxide film, but also produces porous structures.Implanting bioactive TiNb into a porous oxidation film promotes bone-interface contact, improving osseo/osetointegration.

Biomechanical Research of TiNb Alloys with Electrochemical Treatment Using Finite Element Method

“…The sizes of the nodules and craters range from 50 to 500 nm. The similar morphology is also presented on the SEM image of CA-TiNb treated alloy surface in our preliminary research [5]. The extensive nodules and craters presents on the CA-TiNb , 13 (7) 1-11 (2008) surface because of the hydrogen charging titanium transiting to oxide layers.…”

“…In our previous study, Ti-40Nb alloy and electrochemical treatment was performed to treat Ti-40Nb alloy and investigate the biocompatibility. The thick oxide layers consisted mainly of TiO 2 and Nb 2 O 5 phase could be obtained on the surface of Ti-40Nb by anodization with cathodic pretreatment, contributing to the high degree of biocompatibility [5]. The physical properties of biomaterials surface such as surface roughness and surface Gibbs energy are the important factors to determine the shear strength at the interface between the metallic material and bone tissue [6].…”

Effects of Surface Functionalization on the Nanostructure and Biomechanical Properties of Binary Titanium-Niobium Alloys

“…Surface modification of the TiNb specimens using a two-step electrochemical functionalization.-A two-step electrochemical treatment was used for the functionalization of the TiNb specimens, as described previously. 13,26 Briefly, 2-mm-thick TiNb specimens with diameters of 1 cm were mechanically polished using 4000 grit paper and then with 0.3 μm Al 2 O 3 powder. After cleaning with an ultrasonic cleaner, the TiNb specimens underwent cathodic pretreatment for 10 min in 1 M H 2 SO 4 solution at 298 K and were then treated by anodic oxidation at a constant current of 15 A/dm 2 (ASD) for 10 min in 5 M NaOH solution to form metal-oxide layers.…”

“…12 The composition, phases, and mechanical properties of titanium-niobium alloys (TiNb) have been investigated within the Nb range from 14 to 50 wt%. [13][14][15] The elastic modulus of TiNb varies with the Nb content, as well as with the phase constitution and its crystal structure. Moreover, niobium pentoxide (Nb 2 O 5 ) is considered to be a promising oxide coating for metallic implants because of its thermodynamic stability and extremely high corrosion resistance.…”

“…[22][23][24] In our previous work, we developed and investigated a thick nanoporous TiO 2 layer, which was formed on Ti by anodic oxidation after cathodic pretreatment. 13,17,20,22,25,26 The formation of a nanoporous layer was correlated with the presence of the hydrogen-charged Ti, which was formed after cathodic pretreatment and directly changed to nanoporous TiO 2 by the dissolution reaction during anodic oxidation.…”