Role of beta-stabilizing elements on the microstructure and mechanical properties evolution of modified PM Ti surfaces designed for biomedical applications

Ureña, J.; Tejado, E.; Pastor, J.Y.; Velasco, Francisco; Tsipas, S.A.; Jiménez-Morales, Antonia; Gordo, E.

doi:10.1080/00325899.2018.1426185

Cited by 10 publications

(13 citation statements)

References 33 publications

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“…This wear dependence on diffusion treatments could be ascribed to hardness, since high hardness is related to the reduction of plasticity. In this context, although hardness values are in the same order, Ti-Nb presents 320 HV with respect to 280 HV of GreenTi-Nb [24]. This is in agreement with the deeper grooves observed on the GreenTi-Nb material compared to those on Ti-Nb.…”

Section: Tribocorrosion Behavioursupporting

confidence: 83%

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Corrosion and tribocorrosion behaviour of β-type Ti-Nb and Ti-Mo surfaces designed by diffusion treatments for biomedical applications

et al. 2018

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Corrosion and tribocorrosion behaviour of modified Ti surfaces through thermochemical treatments has been studied. Electrochemical Impedance Spectroscopy (EIS) and reciprocating sliding tests using a ball-on-plate tribometer under 1 N load and alumina as counter-material were used to evaluate the influence of Nb and Mo on titanium corrosion and tribocorrosion properties. Ti-Nb and Ti-Mo surfaces exhibited better anticorrosive properties than CP-titanium. Under tribological action the modified Ti surfaces showed similar coefficient of friction and lower tendency to corrosion compared to CP-Ti. Furthermore, Nb diffusion increased the repassivation rate with respect to Ti and Ti-Mo surfaces due to its stable passive film.

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Section: Tribocorrosion Behavioursupporting

confidence: 83%

“…For comparison purposes, a polished sintered titanium substrate was chosen as a control sample. Microstructures and mechanical properties of the designed materials are reported in detailed in a previous work [24].…”

Section: Methodsmentioning

confidence: 99%

Corrosion and tribocorrosion behaviour of β-type Ti-Nb and Ti-Mo surfaces designed by diffusion treatments for biomedical applications

et al. 2018

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“…Two different Ti surfaces (Ti-Nb and Ti-NbNH4Cl) designed by surface modification through Nb diffusion treatments have been produced [17], [18]. The surface modification has been performed on Ti substrates produced from Ti hydride powder (GfE Metalle und Materialien GmbH, Germany) with particle size below 63 μm using a conventional powder metallurgy route of uniaxial pressing at 600 MPa plus a high vacuum sintering at 1100 ᴼC for 60 min.…”

Section: Modified Ti Surface Design and Fabricationmentioning

confidence: 99%

“…In this context, the following surfaces were designed: i) a functionally gradient β-Ti surface with low elastic modulus (64 GPa), and ii) a hard nitride porous Ti surface (6 GPa); both with improved mechanical performance with respect to Ti [18].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Cellular behaviour of bone marrow stromal cells on modified Ti-Nb surfaces

et al. 2018

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The cellular behaviour of bone marrow stromal cells on titanium surfaces modified by niobium diffusion is presented in order to test their osteogenic differentiation response after culturing for 21 days. The surface modification of Ti substrates produced by powder metallurgy was performed through niobium diffusion treatments. Ti-Nb exhibited a β-Ti surface together with a microstructural (β / α+β / α) and compositional (Ti-Nb) gradient which enhances hardness, wear resistance and lowers the elastic modulus making it more similar to the human bone. Furthermore, the Ti-NbNH4Cl by means of the activating agent achieved three times the hardness of Ti together with a porous surface. The in vitro osteogenic differentiation response of bone marrow stromal cells on both Ti-Nb surfaces indicated the positive cell-material interaction. The osteogenic differentiation of cells was successful after 21 days, considering the positive response in terms of increased cell viability, lactate dehydrogenase-(LDH) activity, alkaline phosphatase-(ALP) activity expression (osteogenic marker) and bone-like nodules deposition by ST-2 cells as a bone mineralization cue. Therefore, the positive effect of a low elastic modulus Ti-Nb surface and a porous nitride Ti-NbNH4Cl with suitable wettability and average roughness values on the osteogenic differentiation response of bone marrow stromal cells is demonstrated.

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“…In addition, tantalum can act as a β stabiliser for titanium, which is beneficial for biomedical purposes (ie. low modulus and high strength) [27,222]. Compared to commercially pure titanium (cp-Ti), titanium-tantalum (Ti-Ta) alloys have a lower elastic modulus, higher relative strength (for similar stiffness), enhanced corrosion resistance and excellent biocompatibility, according to Zhou et al [34].…”

Section: Introductionmentioning

confidence: 99%

Additive manufacturing and mechanical properties of titanium lattices for biomedical applications

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Role of beta-stabilizing elements on the microstructure and mechanical properties evolution of modified PM Ti surfaces designed for biomedical applications

Abstract: Role of beta-stabilizing elements on the microstructure and mechanical properties evolution of modified PM Ti surfaces designed for biomedical applications, Powder Metallurgy, 61(2), pp. 90-99.

Cited by 10 publications

References 33 publications

Corrosion and tribocorrosion behaviour of β-type Ti-Nb and Ti-Mo surfaces designed by diffusion treatments for biomedical applications

Corrosion and tribocorrosion behaviour of β-type Ti-Nb and Ti-Mo surfaces designed by diffusion treatments for biomedical applications

Cellular behaviour of bone marrow stromal cells on modified Ti-Nb surfaces

Additive manufacturing and mechanical properties of titanium lattices for biomedical applications

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