Mechanical and Microstructural Characterization of the Ti-25Ta-25Nb Alloy for Dental Applications

Abstract

Titanium and its alloys have been used in biomedical applications due to their excellent properties such as high corrosion resistance, biocompatibility and mechanical properties. In orthodontics, initially, it was common to use nickel-titanium alloys, however due to allergic reactions of patients, new titanium alloys containing elements such as niobium and tantalum are being studied. The Ti-25Ta-25Nb alloy is a β-titanium alloy and it has a low elastic modulus. In the present work, the ternary alloy was evaluated after cold work by swaging followed by solubilization treatment. Microstructure and mechanical properties were evaluated after each step of the process. Results were similar to find in the literature for this alloy obtained by other processing rote.

Ti-25Nb-25Ta alloy treated by plasma electrolytic oxidation in phosphoric acid for implant applications

“…Both conditions disclosed the β-phase and α"-metastable phase peaks. The β phase is a result of the Nb and Ta elements in the Ti-25Nb-25Ta system, which play a role as β stabilizers [42]. The α" is a metastable phase with an orthorhombic crystal system, corresponding a stage between the Hexagonal Closed Packed (hcp) and the Body Cubic Center (bcc) [43][44][45].…”

Processing of the Ti25Ta25Nb3Sn Experimental Alloy Using ECAP Process for Biomedical Applications

“…The Ti-25Nb-25Ta alloy was previously studied by Seixas et al (2016) who identified the feasibility of its use in biomedical applications [14,17]. Recently, Silva et al (2023) verified the effects of adding 5%w of Sn, confirming better results for Ti-25Nb-25Ta-3Sn alloy.…”

“…The Ti-25Ta-25Nb-3Sn experimental alloy was obtained from sheets of titanium (grade 2), tantalum (99.99%), niobium (99.99%), and tin (99.99%). The methodology used in the processing was based on our previous studies with this alloy [14,17,18]. During melting, ingots were melted and re-melted at least ten times due to the difference between the melting point of these materials.…”

“…To stabilize the β phase, the bars were solution-treated in a vacuum furnace at 900 • C for 2 h followed by water quenching. Warm ECAP was added to the already studied processing route [14,17,18] to change the grain size of the alloy.…”

“…These results have led to an increased interest in studies in this area. Some promising alloys developed recently include: Ti-Mo-Nb [4,7,8], Ti-Mo-Nb-Zr [3,9], Ti-Nb-Cu [10], Ti-Zr-Nb [11], Ti-Nb-Sn [12], Ti-Nb-Ta [13,14], Ti-Nb-Zr-Mn-Sn [15], Ti-Mo-Nb-O [16], Ti-Nb-Zr-Ta [16], Ti-Nb-Zr-Ta-Sn [1], and Ti-Ta-Nb-Sn [17,18].…”