Characterization of electrochemical behavior and surface oxide films on superelastic biomedical Ti–Nb–Ta alloy in simulated physiological solutions

The Electrochemical and Mechanical Behavior of Bulk and Porous Superelastic Ti‒Zr-Based Alloys for Biomedical Applications

“…The composition, chemical state, and element distribution profile near the alloy’s surface were studied by Auger electron spectroscopy (AES) using a PHI-680 Physical Electronics (Physical Electronics Inc., Chanhassen, MN, USA) Auger nanoprobe combined with Ar ion sputtering (estimated sputtering rate 8.3·10 −2 nm/s [36]). Relative sensitivity factors for the differential mode elements were used to calculate the concentration.…”

“…Due to the fact that load-bearing intraosseous implants are designed to operate in quite aggressive body media, it is of great practical importance to study the corrosion and electrochemical behavior of these prospective materials, including tests in simulated physiological conditions [34]. The chemical composition and thickness of the passive oxide layer formed on the material surface also play an important role in the implant’s biocompatibility and should be studied carefully [35,36].…”

Comparative study of structure formation and mechanical behavior of age-hardened Ti–Nb–Zr and Ti–Nb–Ta shape memory alloys

“…They contain exclusively biocompatible components, thus providing high corrosion resistance and biochemical compatibility [1][2][3][4][5], whereas their superelastic behavior and low Young's modulus are close to those of bone tissues [6][7][8][9]. The structure and functional properties of these alloys depend on a complex sequence of phase transformations, including reversible β ↔ α″ and β ↔ ω transformations, and can effectively be controlled by a technological sequence comprising plastic deformation, post-deformation annealing (PDA) and age-hardening heat treatments [7,[10][11][12].…”

Influencia de las adiciones de Fe en las aleaciones de Ti-Nb-Ta obtenidas mediante tecnología de polvos, para aplicaciones biomédicas

“…El interés de estudiar dos regiones con diferente distancia al centro se debe a la distribución de la deformación plástica en la muestra. Zhilyaev y colaboradores explican que la deformación verdadera producida en HPT depende del número de rotaciones, el radio y el espesor de la muestra (Zhukova et al, 2014) (Zhilyaev et al, 2003). Esto nos ha llevado a seleccionar las posiciones R/2 y R para la caracterización de las muestras .…”

“…El Titanio presenta una buena resistencia a la corrosión, pero el uso de Nb y Ta mejora la resistencia frente a la corrosión electroquímica cuando lo comparamos con Ti CP o con Ti6Al4V (Karayan, Park and Lee, 2008;Chelariu et al, 2014). Wang y Zheng obtienen una capa de óxido combinada de TiO 2 y Nb 2 O 3 en la aleación Ti16Nb (%atómico) (Wang and Zheng, 2009), cosa que Zhukova y colaboradores confirman para la aleación Ti22Nb6Ta (%atómico) (Zhukova et al, 2014). Navarro Laboulais y colaboradores confirman que la aleación Ti35Nb10Ta muestra una menor corrosión activa y pasiva comparado con el TiCP (Navarro Laboulais et al, 2017).…”