Microstructure and elastic modulus evolution of TiTaNb alloys

Wei, Tian; Huang, J.C.; Chao, Chih-Yeh; Wei, Liangyi; Tsai, Ming-Kai; Chen, Yi‐Hau

doi:10.1016/j.jmbbm.2018.06.047

Cited by 15 publications

(5 citation statements)

References 24 publications

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“…The passive film constituted by Ta 2 O 5 and Nb 2 O 5 has more stability and high corrosion resistance in comparison to conventional Ti-6Al-4V alloys. Additionally, NbTaTi alloys possess a lower modulus than titanium due to the presence of β phase [135]. Thus, most of the β-Ti alloys' studies are focused on the development of β-Ti alloy by the addition of Nb, Ta, Mo, Fe, and other alloying metals able to confer relevant properties to the material.…”

Section: Electrochemical Biocorrosion Of Passive Coatings On β-Ti Alloysmentioning

confidence: 99%

Passive Layers and Corrosion Resistance of Biomedical Ti-6Al-4V and β-Ti Alloys

et al. 2021

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The high specific strength, good corrosion resistance, and great biocompatibility make titanium and its alloys the ideal materials for biomedical metallic implants. Ti-6Al-4V alloy is the most employed in practical biomedical applications because of the excellent combination of strength, fracture toughness, and corrosion resistance. However, recent studies have demonstrated some limits in biocompatibility due to the presence of toxic Al and V. Consequently, scientific literature has reported novel biomedical β-Ti alloys containing biocompatible β-stabilizers (such as Mo, Ta, and Zr) studying the possibility to obtain similar performances to the Ti-6Al-4V alloys. The aim of this review is to highlight the corrosion resistance of the passive layers on biomedical Ti-6Al-4V and β-type Ti alloys in the human body environment by reviewing relevant literature research contributions. The discussion is focused on all those factors that influence the performance of the passive layer at the surface of the alloy subjected to electrochemical corrosion, among which the alloy composition, the method selected to grow the oxide coating, and the physicochemical conditions of the body fluid are the most significant.

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Section: Electrochemical Biocorrosion Of Passive Coatings On β-Ti Alloysmentioning

confidence: 99%

Passive Layers and Corrosion Resistance of Biomedical Ti-6Al-4V and β-Ti Alloys

et al. 2021

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“…Biomedical β-type Ti alloys are typically formed in binary system Ti-Nb [7,13,15], ternary systems Ti-Nb-Ta [16][17][18], Ti-Nb-Zr [10], and Ti-Ta-Zr [19], and quaternary systems such as Ti-Nb-Ta-Zr [8,9,11,20] and Ti-Nb-Zr-Sn [21,22]. Entirely β-type Ti alloys may have a Young's modulus as low as 33 GPa [21], while Ti-6Al-4V has a Young's modulus of approximately 114 GPa [23].…”

Section: Introductionmentioning

confidence: 99%

“…Niobium and tantalum are particularly promising alloying elements. They stabilize the β-phase in Ti base alloys, form highly corrosion-resistant passive oxide layers, and are biocompatible [13,16,17,[24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Advanced Ti–Nb–Ta Alloys for Bone Implants with Improved Functionality

Sass,

Sellin,

Kauertz

et al. 2024

JFB

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The additive manufacturing of titanium–niobium–tantalum alloys with nominal chemical compositions Ti–xNb–6Ta (x = 20, 27, 35) by means of laser beam powder bed fusion is reported, and their potential as implant materials is elaborated by mechanical and biological characterization. The properties of dense specimens manufactured in different build orientations and of open porous Ti–20Nb–6Ta specimens are evaluated. Compression tests indicate that strength and elasticity are influenced by the chemical composition and build orientation. The minimum elasticity is always observed in the 90° orientation. It is lowest for Ti–20Nb–6Ta (43.2 ± 2.7 GPa) and can be further reduced to 8.1 ± 1.0 GPa for open porous specimens (p < 0.001). Furthermore, human osteoblasts are cultivated for 7 and 14 days on as-printed specimens and their biological response is compared to that of Ti–6Al–4V. Build orientation and cultivation time significantly affect the gene expression profile of osteogenic differentiation markers. Incomplete cell spreading is observed in specimens manufactured in 0° build orientation, whereas widely stretched cells are observed in 90° build orientation, i.e., parallel to the build direction. Compared to Ti–6Al–4V, Ti–Nb–Ta specimens promote improved osteogenesis and reduce the induction of inflammation. Accordingly, Ti–xNb–6Ta alloys have favorable mechanical and biological properties with great potential for application in orthopedic implants.

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“…These materials include in particular a new titanium-niobium (TiNb) alloy (a binary system with a β-structure, i.e., β-TiNb), and a number of other Ti-Nb, titaniumniobium-tantalum (Ti-Nb-Ta) and titanium-zirconium-niobium (Ti-Zr-Nb) alloys. The elastic modulus of these materials decreases to ~80 GPa at ~25 wt.% of Nb for TiNb, to ~50 GPa at ~25 wt.% of Nb and 6.25% Zr for TiNbZr, and to ~75 GPa at ~23 wt.% of Ta and 10 wt.% of Zr for TiTaZr [9,10]. At the same time, these alloys in general have a higher corrosion resistance [11].…”

Section: Introductionmentioning

confidence: 99%

Beta-Titanium Alloy Covered by Ferroelectric Coating–Physicochemical Properties and Human Osteoblast-Like Cell Response

et al. 2021

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Beta-titanium alloys are promising materials for bone implants due to their advantageous mechanical properties. For enhancing the interaction of bone cells with this perspective material, we developed a ferroelectric barium titanate (BaTiO3) coating on a Ti39Nb alloy by hydrothermal synthesis. This coating was analyzed by scanning electron and Raman microscopy, X-ray diffraction, piezoresponse force microscopy, X-ray photoelectron spectroscopy, nanoindentation, and roughness measurement. Leaching experiments in a saline solution revealed that Ba is released from the coating. A progressive decrease of Ba concentration in the material was also found after 1, 3, and 7 days of cultivation of human osteoblast-like Saos-2 cells. On day 1, the Saos-2 cells adhered on the BaTiO3 film in higher initial numbers than on the bare alloy, but they were less spread, and their initial proliferation rate was slower. These cells also contained a lower amount of beta1-integrins and vinculin, i.e., molecules involved in cell adhesion, and produced a lower amount of collagen I. This cell behavior was attributed to a higher surface roughness of BaTiO3 film rather than to its potential cytotoxicity, because the cell viability on this film was very high, reaching almost 99%. The amount of alkaline phosphatase, an enzyme involved in bone matrix mineralization, was similar in cells on the BaTiO3-coated and uncoated alloy, and on day 7, the cells on BaTiO3 film attained a higher final cell population density. These results indicate that after some improvements, particularly in its roughness and stability, the hydrothermal ferroelectric BaTiO3 film could be promising coating for improved osseointegration of bone implants.

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Microstructure and elastic modulus evolution of TiTaNb alloys

Cited by 15 publications

References 24 publications

Passive Layers and Corrosion Resistance of Biomedical Ti-6Al-4V and β-Ti Alloys

Passive Layers and Corrosion Resistance of Biomedical Ti-6Al-4V and β-Ti Alloys

Advanced Ti–Nb–Ta Alloys for Bone Implants with Improved Functionality

Beta-Titanium Alloy Covered by Ferroelectric Coating–Physicochemical Properties and Human Osteoblast-Like Cell Response

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