Atomic–scale investigations of passive film formation on Ti-Nb alloys

Çaha, Ihsan; Alves, Alexandra Cruz; Chirico, Caterina; Pinto, A. M. P.; Tsipas, S.A.; Gordo, E.; Bondarchuk, Oleksandr; Deepak, Francis Leonard; Toptan, Fatih

doi:10.1016/j.apsusc.2022.156282

Cited by 14 publications

(3 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Differently from them, 40 MC has presented an utterly dendritic structure, which is common in processing with mold. The results found here are in coherence with the ones found in the literature 21,[23][24][25] .…”

Section: Resultssupporting

confidence: 93%

“…In both cases, wear volume and coefficient, the results presented by CM and RC conditions did not vary significantly since it has similar hardness and elastic modulus although it has presented different phases. The hardness and elastic modulus results are in accordance with literature [21][22][23][24][25] In Figure 2b it is presented the results of Ti-25Nb. It was observed a similar result that 15Nb and the wear volume varies according to hardness.…”

Section: Ti-15nbsupporting

confidence: 87%

See 1 more Smart Citation

Wear Behavior of Ti-xNb Biomedical Alloys by Ball Cratering

Mattos,

Kuroda,

Rossi

et al. 2024

Mat. Res.

View full text Add to dashboard Cite

Ti alloys have been developing through the years, aiming the biomedical application since it has suitable properties. Among Ti alloys, the Ti-Nb systems are a pronounced group to biomedical applications due to its low elastic modulus, good corrosion resistance, and mechanical properties. Although this system is quite well-known regarding its phases, structure and properties, there is not plenty of information about wear available in the literature. To investigate the wear resistance, the samples were submitted to x-ray diffraction (XRD) and scanning electron microscopy (SEM) to analyze the phases formed. Hardness and elastic modulus were measured by microhardness Vickers and dynamic Young modulus by excitation impulse. Additionally, wear volume, wear resistance, and H/E ratio were calculated to understand the wear material's performance. This study aims to investigate the wear resistance of Ti-xNb (x = 15, 25 and 40wt.%), one of each type of Ti alloys and phases formed: Ti-15Nb (α´), Ti-25Nb (α") and Ti-40Nb (β) and the influence of cooling rate after solution heat treatment on wear properties through ball cratering. It was possible to find that the harder the alloy, the higher the wear resistance. Thus, in the case of Ti-xNb (x = 15, 25 and 40wt.%), alloys the hardness plays a significant role in wear resistance. Besides that, the samples that have presented the α´ or α"phase have the lowest wear resistance. Therefore, not only the hardness influences the wear resistance but also the combination of phases formed.

show abstract

Section: Resultssupporting

confidence: 93%

Section: Ti-15nbsupporting

confidence: 87%

Wear Behavior of Ti-xNb Biomedical Alloys by Ball Cratering

Mattos,

Kuroda,

Rossi

et al. 2024

Mat. Res.

View full text Add to dashboard Cite

show abstract

“…Preferential dissolution of the β phase observed in two‐phased alloy justifies the necessity to verify if the presence of albumin accelerates H 2 O 2 ‐induced corrosion in the case of single β‐phase Ti alloys, such as those from the TiNb system, which are currently widely studied owing to their reduced stiffness combined with high biocompatibility 26–29 . Solution‐treated binary TiNb alloys with Nb addition in the range of 40–45 wt% demonstrate a low elastic modulus (between 60 and 65 GPa), which is much closer value to the stiffness of human cortical bone (10–30 GPa) compared to standard Ti‐based biomaterials (100–120 GPa) 30 .…”

Section: Introductionmentioning

confidence: 99%

Albumin suppresses oxidation of TiNb alloy in the simulated inflammatory environment

Sotniczuk,

Kalita,

Chromiński

et al. 2024

J Biomed Mater Res

View full text Add to dashboard Cite

Literature data has shown that reactive oxygen species (ROS), generated by immune cells during post‐operative inflammation, could induce corrosion of standard Ti‐based biomaterials. For Ti6Al4V alloy, this process can be further accelerated by the presence of albumin. However, this phenomenon remains unexplored for Ti β‐phase materials, such as TiNb alloys. These alloys are attractive due to their relatively low elastic modulus value. This study aims to address the question of how albumin influences the corrosion resistance of TiNb alloy under simulated inflammation. Electrochemical and ion release tests have revealed that albumin significantly enhances corrosion resistance over both short (2 and 24 h) and long (2 weeks) exposure periods. Furthermore, post‐immersion XPS and cross‐section TEM analysis have demonstrated that prolonged exposure to an albumin‐rich inflammatory solution results in the complete coverage of the TiNb surface by a protein layer. Moreover, TEM studies revealed that H2O2‐induced oxidation and further formation of a defective oxide film were suppressed in the solution enriched with albumin. Overall results indicate that contrary to Ti6Al4V, the addition of albumin to the PBS + H2O2 solution is not necessary to simulate the harsh inflammatory conditions as could possibly be found in the vicinity of a TiNb implant.

show abstract